- Published on
Emergency and Acute Medicine – Carpal Tunnel Syndrome
Condition Overview
Carpal tunnel syndrome results from compression of the median nerve as it traverses the carpal tunnel, a confined space formed by the carpal bones and the transverse carpal ligament. Structures within the tunnel include the median nerve, flexor digitorum profundus, flexor digitorum superficialis, and flexor pollicis longus tendons. The condition may present as an acute or chronic process.
Causes and Predisposing Factors
Acute cases are typically related to trauma, infection, hemorrhage, snake bite, or high-pressure injection injuries. Chronic disease is more common and is associated with repetitive or high-impact occupational activities, pregnancy, oral contraceptive use, granulomatous diseases such as tuberculosis or sarcoidosis, space-occupying lesions causing median nerve compression, osteophytes, amyloid, multiple myeloma, rheumatoid arthritis, endocrine disorders including hypothyroidism, diabetes mellitus, and acromegaly, chronic hemodialysis, or idiopathic causes.
In children, idiopathic disease is rare and most cases are secondary to identifiable causes such as trauma, mucolipidosis, median nerve hamartoma, anomalous flexor digitorum superficialis, or hemophilia with hematoma.
Clinical Presentation
Patients report acute or gradual onset of symptoms. Sensory complaints include numbness and paresthesia in the median nerve distribution involving the thumb, index finger, middle finger, and radial half of the ring finger. Pain is often localized to the wrist or hand but may radiate proximally to the forearm, elbow, or shoulder. Symptoms are classically worse at night and may improve with shaking the hand. Repetitive wrist movements and sustained wrist flexion, such as during driving, often exacerbate symptoms.
On examination, weakness of the abductor pollicis brevis and opponens pollicis may be present, leading to clumsiness, dropping objects, or impaired fine motor control. Loss of two-point discrimination and thenar muscle atrophy are late findings and highly specific.
Key Diagnostic Considerations
Diagnosis is primarily clinical, based on characteristic nocturnal pain and paresthesia in the median nerve distribution. Motor weakness and thenar wasting suggest advanced disease. Provocative maneuvers have limited sensitivity and specificity but may support the diagnosis. These include the Phalen test, Tinel sign at the wrist, carpal compression test with direct pressure over the transverse carpal ligament, and the tourniquet test using a blood pressure cuff.
Investigations and Interpretation
Laboratory studies are generally unnecessary unless systemic disease is suspected; thyroid studies or rheumatologic testing may be considered based on history and examination. Plain wrist radiographs are indicated when trauma or degenerative arthritis is suspected. CT may demonstrate bony encroachment in select cases but is not routine. MRI can visualize soft tissue abnormalities such as median nerve flattening, palmar bowing of the transverse carpal ligament, synovial swelling, or nerve signal changes, though it is not recommended for routine diagnosis. Ultrasound is increasingly used and may show median nerve swelling proximally, distal flattening, and ligament bowing. Nerve conduction studies and electromyography remain the diagnostic gold standard.
Important Alternative Diagnoses
Conditions to consider include cervical radiculopathy involving C6–C7 roots, hand–arm vibration syndrome, thoracic outlet syndrome, first carpometacarpal joint osteoarthritis, brachial plexitis, generalized peripheral neuropathy, syringomyelia, and multiple sclerosis.
Emergency Department Management
No immediate stabilization is typically required. Acute carpal tunnel syndrome constitutes a surgical emergency and warrants urgent hand surgery consultation for decompression of the transverse carpal ligament using open or endoscopic techniques. Chronic disease is managed conservatively with analgesics, activity modification, avoidance of repetitive wrist motion, and wrist splinting in a neutral position, particularly at night. Adjunctive therapies may include yoga and referral for occupational or ergonomic evaluation with tendon and nerve-gliding exercises.
Pharmacologic Therapy
Analgesics may be used for symptom control. NSAIDs have not demonstrated long-term benefit. Short courses of oral corticosteroids provide temporary improvement, such as prednisone 20 mg daily for 7 days followed by 10 mg daily for 7 days, or prednisolone 20–25 mg daily tapered over 2–4 weeks. Local corticosteroid injections offer transient relief in approximately two-thirds of patients and may include hydrocortisone 20 mg, methylprednisolone 15–40 mg, or triamcinolone 20 mg, typically combined with a small volume of lidocaine.
Disposition and Follow-Up
Admission is indicated for acute carpal tunnel syndrome requiring urgent surgical decompression. Patients with chronic disease may be discharged once pain is controlled. Follow-up with a primary care provider, occupational medicine specialist, or hand surgeon should occur within 1–2 weeks for definitive management and consideration of surgical intervention if symptoms persist or progress.
Condition Overview
Carpal tunnel syndrome results from compression of the median nerve as it traverses the carpal tunnel, a confined space formed by the carpal bones and the transverse carpal ligament. Structures within the tunnel include the median nerve, flexor digitorum profundus, flexor digitorum superficialis, and flexor pollicis longus tendons. The condition may present as an acute or chronic process.
Causes and Predisposing Factors
Acute cases are typically related to trauma, infection, hemorrhage, snake bite, or high-pressure injection injuries. Chronic disease is more common and is associated with repetitive or high-impact occupational activities, pregnancy, oral contraceptive use, granulomatous diseases such as tuberculosis or sarcoidosis, space-occupying lesions causing median nerve compression, osteophytes, amyloid, multiple myeloma, rheumatoid arthritis, endocrine disorders including hypothyroidism, diabetes mellitus, and acromegaly, chronic hemodialysis, or idiopathic causes.
In children, idiopathic disease is rare and most cases are secondary to identifiable causes such as trauma, mucolipidosis, median nerve hamartoma, anomalous flexor digitorum superficialis, or hemophilia with hematoma.
Clinical Presentation
Patients report acute or gradual onset of symptoms. Sensory complaints include numbness and paresthesia in the median nerve distribution involving the thumb, index finger, middle finger, and radial half of the ring finger. Pain is often localized to the wrist or hand but may radiate proximally to the forearm, elbow, or shoulder. Symptoms are classically worse at night and may improve with shaking the hand. Repetitive wrist movements and sustained wrist flexion, such as during driving, often exacerbate symptoms.
On examination, weakness of the abductor pollicis brevis and opponens pollicis may be present, leading to clumsiness, dropping objects, or impaired fine motor control. Loss of two-point discrimination and thenar muscle atrophy are late findings and highly specific.
Key Diagnostic Considerations
Diagnosis is primarily clinical, based on characteristic nocturnal pain and paresthesia in the median nerve distribution. Motor weakness and thenar wasting suggest advanced disease. Provocative maneuvers have limited sensitivity and specificity but may support the diagnosis. These include the Phalen test, Tinel sign at the wrist, carpal compression test with direct pressure over the transverse carpal ligament, and the tourniquet test using a blood pressure cuff.
Investigations and Interpretation
Laboratory studies are generally unnecessary unless systemic disease is suspected; thyroid studies or rheumatologic testing may be considered based on history and examination. Plain wrist radiographs are indicated when trauma or degenerative arthritis is suspected. CT may demonstrate bony encroachment in select cases but is not routine. MRI can visualize soft tissue abnormalities such as median nerve flattening, palmar bowing of the transverse carpal ligament, synovial swelling, or nerve signal changes, though it is not recommended for routine diagnosis. Ultrasound is increasingly used and may show median nerve swelling proximally, distal flattening, and ligament bowing. Nerve conduction studies and electromyography remain the diagnostic gold standard.
Important Alternative Diagnoses
Conditions to consider include cervical radiculopathy involving C6–C7 roots, hand–arm vibration syndrome, thoracic outlet syndrome, first carpometacarpal joint osteoarthritis, brachial plexitis, generalized peripheral neuropathy, syringomyelia, and multiple sclerosis.
Emergency Department Management
No immediate stabilization is typically required. Acute carpal tunnel syndrome constitutes a surgical emergency and warrants urgent hand surgery consultation for decompression of the transverse carpal ligament using open or endoscopic techniques. Chronic disease is managed conservatively with analgesics, activity modification, avoidance of repetitive wrist motion, and wrist splinting in a neutral position, particularly at night. Adjunctive therapies may include yoga and referral for occupational or ergonomic evaluation with tendon and nerve-gliding exercises.
Pharmacologic Therapy
Analgesics may be used for symptom control. NSAIDs have not demonstrated long-term benefit. Short courses of oral corticosteroids provide temporary improvement, such as prednisone 20 mg daily for 7 days followed by 10 mg daily for 7 days, or prednisolone 20–25 mg daily tapered over 2–4 weeks. Local corticosteroid injections offer transient relief in approximately two-thirds of patients and may include hydrocortisone 20 mg, methylprednisolone 15–40 mg, or triamcinolone 20 mg, typically combined with a small volume of lidocaine.
Disposition and Follow-Up
Admission is indicated for acute carpal tunnel syndrome requiring urgent surgical decompression. Patients with chronic disease may be discharged once pain is controlled. Follow-up with a primary care provider, occupational medicine specialist, or hand surgeon should occur within 1–2 weeks for definitive management and consideration of surgical intervention if symptoms persist or progress.
- Published on
Emergency and Acute Medicine – Carpal Fractures
Overview
Carpal fractures involve the most frequently injured region of the upper extremity. The scaphoid accounts for approximately 68% of cases, followed by the triquetrum at about 18%. These injuries often coexist with other wrist trauma, including scaphocapitate syndrome (capitate fracture with scaphoid fracture), perilunate dislocations, hamate fractures with fourth and fifth carpometacarpal injuries, and concurrent distal radius fractures.
Mechanisms of Injury
Typical mechanisms include a fall on an outstretched hand with wrist hyperextension or hyperflexion, direct blows, axial loading, and repetitive or chronic use injuries. Hyperflexion commonly results in dorsal avulsion fractures, while hyperextension leads to volar avulsion fractures. Hook of hamate fractures are classically associated with forceful swinging motions, such as with racquets or golf clubs.
Clinical Features
Patients usually report a fall or direct impact. Examination reveals pain, swelling, and reduced wrist motion. Careful palpation of individual carpal bones is possible with proper wrist positioning. Scaphoid fractures often present with snuffbox tenderness, which is sensitive but nonspecific; specificity improves with wrist pronation and ulnar deviation. Axial thumb compression may elicit pain but lacks specificity. Palmar tenderness over the scaphoid tubercle at the distal wrist crease with wrist extension is more specific.
Initial Assessment Priorities
A complete examination of the entire upper extremity and shoulder girdle is required to identify associated injuries. A thorough neurovascular assessment is essential, particularly for hamate fractures, which may involve ulnar nerve or artery injury.
Diagnostic Evaluation
Standard imaging includes anteroposterior, lateral, and oblique views of the wrist and hand. Dedicated views, such as scaphoid views, should be obtained when suspicion remains high. CT scanning provides superior fracture detection, while MRI is useful for identifying occult fractures and ligamentous injuries.
Conditions to Differentiate
Consider metacarpal base fractures, distal radius or ulna fractures, lunate dislocation, perilunate dislocation, and in children, distal radius epiphyseal injuries, as pediatric wrist trauma rarely represents a simple sprain.
Early Management
In the prehospital or early ED setting, protect open wounds, elevate the limb, apply ice, remove constricting jewelry, and immobilize the wrist with padded splints. As with all trauma, assess for life-threatening injuries first.
Definitive Emergency Care
Most isolated carpal fractures are initially treated with immobilization aimed at maintaining alignment. Thumb spica splints are used for scaphoid and trapezium fractures. Sugar-tong splints are appropriate for capitate and lunate fractures, maintaining the wrist in neutral position. Volar splints are suitable for triquetrum, pisiform, trapezoid, and hamate fractures with slight wrist extension. Suspected fractures, especially scaphoid injuries, should be splinted even if initial radiographs are negative. Open fractures require immediate irrigation, IV antibiotics targeting Staphylococcus aureus with additional gram-negative coverage for severe soft tissue injury, tetanus prophylaxis, neurovascular monitoring, and urgent orthopedic consultation.
Pain Control
Analgesia includes NSAIDs, mild oral narcotics, or other oral analgesics. Proper immobilization often provides significant pain relief.
Disposition Planning
Open fractures and unstable or displaced injuries requiring operative intervention warrant admission. Closed, nondisplaced fractures adequately immobilized may be discharged with orthopedic follow-up in 7–10 days.
Follow-Up Strategy
All confirmed fractures require orthopedic referral for casting and definitive care. Missed injuries or inadequate immobilization can result in nonunion, avascular necrosis, chronic pain, and disability. Persistent pain despite negative initial imaging should prompt repeat radiographs or advanced imaging after 7–10 days.
Clinical Pearls and Pitfalls
Carpal fractures are frequently occult on initial imaging and easily missed. All clinically suspected fractures should be immobilized. While most scaphoid fractures occur in isolation, other carpal fractures are commonly associated with additional wrist or hand injuries. Long-term outcomes depend heavily on early recognition, proper splinting in a functional position, and timely orthopedic follow-up.
Overview
Carpal fractures involve the most frequently injured region of the upper extremity. The scaphoid accounts for approximately 68% of cases, followed by the triquetrum at about 18%. These injuries often coexist with other wrist trauma, including scaphocapitate syndrome (capitate fracture with scaphoid fracture), perilunate dislocations, hamate fractures with fourth and fifth carpometacarpal injuries, and concurrent distal radius fractures.
Mechanisms of Injury
Typical mechanisms include a fall on an outstretched hand with wrist hyperextension or hyperflexion, direct blows, axial loading, and repetitive or chronic use injuries. Hyperflexion commonly results in dorsal avulsion fractures, while hyperextension leads to volar avulsion fractures. Hook of hamate fractures are classically associated with forceful swinging motions, such as with racquets or golf clubs.
Clinical Features
Patients usually report a fall or direct impact. Examination reveals pain, swelling, and reduced wrist motion. Careful palpation of individual carpal bones is possible with proper wrist positioning. Scaphoid fractures often present with snuffbox tenderness, which is sensitive but nonspecific; specificity improves with wrist pronation and ulnar deviation. Axial thumb compression may elicit pain but lacks specificity. Palmar tenderness over the scaphoid tubercle at the distal wrist crease with wrist extension is more specific.
Initial Assessment Priorities
A complete examination of the entire upper extremity and shoulder girdle is required to identify associated injuries. A thorough neurovascular assessment is essential, particularly for hamate fractures, which may involve ulnar nerve or artery injury.
Diagnostic Evaluation
Standard imaging includes anteroposterior, lateral, and oblique views of the wrist and hand. Dedicated views, such as scaphoid views, should be obtained when suspicion remains high. CT scanning provides superior fracture detection, while MRI is useful for identifying occult fractures and ligamentous injuries.
Conditions to Differentiate
Consider metacarpal base fractures, distal radius or ulna fractures, lunate dislocation, perilunate dislocation, and in children, distal radius epiphyseal injuries, as pediatric wrist trauma rarely represents a simple sprain.
Early Management
In the prehospital or early ED setting, protect open wounds, elevate the limb, apply ice, remove constricting jewelry, and immobilize the wrist with padded splints. As with all trauma, assess for life-threatening injuries first.
Definitive Emergency Care
Most isolated carpal fractures are initially treated with immobilization aimed at maintaining alignment. Thumb spica splints are used for scaphoid and trapezium fractures. Sugar-tong splints are appropriate for capitate and lunate fractures, maintaining the wrist in neutral position. Volar splints are suitable for triquetrum, pisiform, trapezoid, and hamate fractures with slight wrist extension. Suspected fractures, especially scaphoid injuries, should be splinted even if initial radiographs are negative. Open fractures require immediate irrigation, IV antibiotics targeting Staphylococcus aureus with additional gram-negative coverage for severe soft tissue injury, tetanus prophylaxis, neurovascular monitoring, and urgent orthopedic consultation.
Pain Control
Analgesia includes NSAIDs, mild oral narcotics, or other oral analgesics. Proper immobilization often provides significant pain relief.
Disposition Planning
Open fractures and unstable or displaced injuries requiring operative intervention warrant admission. Closed, nondisplaced fractures adequately immobilized may be discharged with orthopedic follow-up in 7–10 days.
Follow-Up Strategy
All confirmed fractures require orthopedic referral for casting and definitive care. Missed injuries or inadequate immobilization can result in nonunion, avascular necrosis, chronic pain, and disability. Persistent pain despite negative initial imaging should prompt repeat radiographs or advanced imaging after 7–10 days.
Clinical Pearls and Pitfalls
Carpal fractures are frequently occult on initial imaging and easily missed. All clinically suspected fractures should be immobilized. While most scaphoid fractures occur in isolation, other carpal fractures are commonly associated with additional wrist or hand injuries. Long-term outcomes depend heavily on early recognition, proper splinting in a functional position, and timely orthopedic follow-up.
- Published on
Emergency and Acute Medicine – Peripartum Cardiomyopathy
Core Definition
Peripartum cardiomyopathy is a dilated cardiomyopathy that develops during the final month of pregnancy or within the first 5 months after delivery. Diagnosis requires all of the following: onset of heart failure in the defined peripartum period, no identifiable alternative cause, no preexisting cardiac disease, and objective echocardiographic evidence of systolic dysfunction. Incidence is approximately 3–5 per 10,000 live births. About half of cases recover spontaneously. Reported mortality ranges from 18% to 56%. Thromboembolic complications are more common than in other cardiomyopathies.
Risk Profile and Prognostic Indicators
Risk is increased in women older than 30 years, multiparity, multiple gestations, prolonged tocolytic therapy exceeding 4 weeks, obesity, preeclampsia, and African American race. Poor prognosis is associated with low left ventricular ejection fraction at 6 months postpartum, symptom onset more than 2 weeks after delivery, age over 30 years, African American descent, and multiparity.
Proposed Pathophysiology
The exact cause remains uncertain. Leading theories include viral myocarditis facilitated by pregnancy-related immunosuppression, autoimmune reaction to maternal or fetal antigens, maladaptive response to pregnancy-related hemodynamic stress, stress-induced cytokine activation, prolonged tocolysis, and nutritional deficiencies such as selenium deficiency.
Clinical Presentation
Common symptoms include dyspnea, orthopnea, paroxysmal nocturnal dyspnea, cough, dizziness, chest discomfort, fatigue, anorexia, and arrhythmias. History should focus on timing of symptom onset, persistent unexplained cough, excessive weight gain greater than 2–4 lb per week, prior cardiac disease, and complications in previous pregnancies. Examination findings may include jugular venous distention, gallop rhythm, mitral regurgitation murmur, loud P2, pulmonary rales, rapid-onset peripheral edema, hepatomegaly, and hepatojugular reflux.
Essential Evaluation
Chest radiography may show pulmonary venous congestion, cardiomegaly (difficult to interpret in pregnancy), and pleural effusions. Electrocardiography is nonspecific but may demonstrate left ventricular hypertrophy, left atrial enlargement, T-wave changes, ventricular ectopy (≈40%), or atrial fibrillation (≈20%).
Diagnostic Data Interpretation
Laboratory studies typically show normal electrolytes and renal function. Mild postpartum anemia may worsen dyspnea and fatigue. BNP is useful in differentiating cardiac from pulmonary causes of dyspnea; levels >100 pg/mL strongly support heart failure, while ≤50 pg/mL has a high negative predictive value. Chest imaging may demonstrate progressive pulmonary edema patterns from cephalization to interstitial and alveolar edema, sometimes mimicking pneumonia. Echocardiography confirms diagnosis by showing global ventricular dilation, wall thinning, and reduced systolic function. Diagnostic criteria include ejection fraction <45%, fractional shortening <30%, and indexed lv end-diastolic dimension>2.72 cm/m², with exclusion of valvular disease and tamponade. Endomyocardial biopsy is reserved for suspected myocarditis or consideration of immunosuppressive therapy.
Conditions to Exclude
Alternative causes of dilated cardiomyopathy include ischemia, infarction, valvular disease, chronic hypertension, familial cardiomyopathy, alcohol or drug toxicity, metabolic disorders, thyroid disease, infections, autoimmune disease, neuromuscular disorders, and mitochondrial disease. Other causes of dyspnea or edema include pulmonary embolism, pneumonia, asthma, anemia, hyperthyroidism, constrictive pericarditis, tamponade, nephrotic syndrome, and cirrhosis.
Initial and Emergency Management
Differentiate pulmonary edema from reactive airway disease early. Rapid assessment of airway, breathing, and circulation is essential. Provide supplemental oxygen, consider noninvasive ventilation, and address preload and afterload carefully.
Antepartum management includes nitrates, hydralazine, IV diuretics, amlodipine, digoxin for rate control, cautious use of carvedilol when stable, low-molecular-weight heparin when EF <35%, fetal monitoring, and invasive monitoring if unstable.
Postpartum therapy allows addition of ACE inhibitors or ARBs. Anticoagulation is frequently recommended due to high thromboembolic risk. Heparin is preferred during pregnancy; warfarin is avoided until postpartum. Refractory or severe cases may require inotropes, vasopressors, vasodilators, mechanical circulatory support, or extracorporeal membrane oxygenation. Immunosuppressive therapy may be considered if no improvement occurs after 2 weeks of optimal medical therapy, though evidence remains mixed.
Disposition Decisions
All symptomatic patients with new-onset peripartum cardiomyopathy require admission. ICU care is indicated for pulmonary edema, cardiogenic shock, or ischemia. Discharge may be considered only in carefully selected patients with mild dysfunction, established disease, rapid symptom resolution, no ischemia, and reliable close follow-up.
Follow-Up Guidance
Cardiology follow-up is mandatory. Patients should maintain adequate hydration, restrict dietary sodium, avoid alcohol, use compression stockings if needed, monitor daily weights, and seek care for rapid weight gain, worsening dyspnea, syncope, or palpitations.
Clinical Pearls and Pitfalls
Thromboembolism risk is high in pregnancy-associated cardiomyopathy. Early recognition and coordinated management with cardiology and obstetrics significantly improve outcomes.
Core Definition
Peripartum cardiomyopathy is a dilated cardiomyopathy that develops during the final month of pregnancy or within the first 5 months after delivery. Diagnosis requires all of the following: onset of heart failure in the defined peripartum period, no identifiable alternative cause, no preexisting cardiac disease, and objective echocardiographic evidence of systolic dysfunction. Incidence is approximately 3–5 per 10,000 live births. About half of cases recover spontaneously. Reported mortality ranges from 18% to 56%. Thromboembolic complications are more common than in other cardiomyopathies.
Risk Profile and Prognostic Indicators
Risk is increased in women older than 30 years, multiparity, multiple gestations, prolonged tocolytic therapy exceeding 4 weeks, obesity, preeclampsia, and African American race. Poor prognosis is associated with low left ventricular ejection fraction at 6 months postpartum, symptom onset more than 2 weeks after delivery, age over 30 years, African American descent, and multiparity.
Proposed Pathophysiology
The exact cause remains uncertain. Leading theories include viral myocarditis facilitated by pregnancy-related immunosuppression, autoimmune reaction to maternal or fetal antigens, maladaptive response to pregnancy-related hemodynamic stress, stress-induced cytokine activation, prolonged tocolysis, and nutritional deficiencies such as selenium deficiency.
Clinical Presentation
Common symptoms include dyspnea, orthopnea, paroxysmal nocturnal dyspnea, cough, dizziness, chest discomfort, fatigue, anorexia, and arrhythmias. History should focus on timing of symptom onset, persistent unexplained cough, excessive weight gain greater than 2–4 lb per week, prior cardiac disease, and complications in previous pregnancies. Examination findings may include jugular venous distention, gallop rhythm, mitral regurgitation murmur, loud P2, pulmonary rales, rapid-onset peripheral edema, hepatomegaly, and hepatojugular reflux.
Essential Evaluation
Chest radiography may show pulmonary venous congestion, cardiomegaly (difficult to interpret in pregnancy), and pleural effusions. Electrocardiography is nonspecific but may demonstrate left ventricular hypertrophy, left atrial enlargement, T-wave changes, ventricular ectopy (≈40%), or atrial fibrillation (≈20%).
Diagnostic Data Interpretation
Laboratory studies typically show normal electrolytes and renal function. Mild postpartum anemia may worsen dyspnea and fatigue. BNP is useful in differentiating cardiac from pulmonary causes of dyspnea; levels >100 pg/mL strongly support heart failure, while ≤50 pg/mL has a high negative predictive value. Chest imaging may demonstrate progressive pulmonary edema patterns from cephalization to interstitial and alveolar edema, sometimes mimicking pneumonia. Echocardiography confirms diagnosis by showing global ventricular dilation, wall thinning, and reduced systolic function. Diagnostic criteria include ejection fraction <45%, fractional shortening <30%, and indexed lv end-diastolic dimension>2.72 cm/m², with exclusion of valvular disease and tamponade. Endomyocardial biopsy is reserved for suspected myocarditis or consideration of immunosuppressive therapy.
Conditions to Exclude
Alternative causes of dilated cardiomyopathy include ischemia, infarction, valvular disease, chronic hypertension, familial cardiomyopathy, alcohol or drug toxicity, metabolic disorders, thyroid disease, infections, autoimmune disease, neuromuscular disorders, and mitochondrial disease. Other causes of dyspnea or edema include pulmonary embolism, pneumonia, asthma, anemia, hyperthyroidism, constrictive pericarditis, tamponade, nephrotic syndrome, and cirrhosis.
Initial and Emergency Management
Differentiate pulmonary edema from reactive airway disease early. Rapid assessment of airway, breathing, and circulation is essential. Provide supplemental oxygen, consider noninvasive ventilation, and address preload and afterload carefully.
Antepartum management includes nitrates, hydralazine, IV diuretics, amlodipine, digoxin for rate control, cautious use of carvedilol when stable, low-molecular-weight heparin when EF <35%, fetal monitoring, and invasive monitoring if unstable.
Postpartum therapy allows addition of ACE inhibitors or ARBs. Anticoagulation is frequently recommended due to high thromboembolic risk. Heparin is preferred during pregnancy; warfarin is avoided until postpartum. Refractory or severe cases may require inotropes, vasopressors, vasodilators, mechanical circulatory support, or extracorporeal membrane oxygenation. Immunosuppressive therapy may be considered if no improvement occurs after 2 weeks of optimal medical therapy, though evidence remains mixed.
Disposition Decisions
All symptomatic patients with new-onset peripartum cardiomyopathy require admission. ICU care is indicated for pulmonary edema, cardiogenic shock, or ischemia. Discharge may be considered only in carefully selected patients with mild dysfunction, established disease, rapid symptom resolution, no ischemia, and reliable close follow-up.
Follow-Up Guidance
Cardiology follow-up is mandatory. Patients should maintain adequate hydration, restrict dietary sodium, avoid alcohol, use compression stockings if needed, monitor daily weights, and seek care for rapid weight gain, worsening dyspnea, syncope, or palpitations.
Clinical Pearls and Pitfalls
Thromboembolism risk is high in pregnancy-associated cardiomyopathy. Early recognition and coordinated management with cardiology and obstetrics significantly improve outcomes.
- Published on
Emergency and Acute Medicine – Cholelithiasis
Overview and mechanism
Cholelithiasis refers to the presence of gallstones that become symptomatic when they obstruct the cystic duct or common bile duct, disrupting normal bile flow and triggering gallbladder spasm. This produces the characteristic pain of biliary colic. A related functional disorder, biliary dyskinesia, causes identical symptoms despite the absence of stones. When stones migrate into the common bile duct (choledocholithiasis), pain may be more prolonged and is often accompanied by abnormal liver function tests and bilirubin elevation, with risk of complications such as cholangitis or pancreatitis.
Causes and risk factors
Most gallstones are cholesterol stones, which develop when bile becomes supersaturated with cholesterol. Pigment stones account for about one fifth of cases and consist mainly of calcium bilirubinate; they are commonly associated with hemolytic disorders that increase unconjugated bilirubin levels. The incidence of gallstones rises with age and is higher in females, with additional risk factors including obesity, pregnancy, rapid weight loss, Hispanic ethnicity, and medications that promote biliary stasis such as oral contraceptives or ceftriaxone. In children, gallstones are rare and are usually linked to hemolytic anemias such as sickle cell disease or hereditary spherocytosis. Biliary sludge, a nonstone crystalline material, may also cause biliary colic and is associated with pregnancy, rapid weight loss, certain medications, and organ transplantation. Chronic obstruction with calcium deposition can lead to a porcelain gallbladder, a condition associated with an increased risk of gallbladder carcinoma.
Clinical presentation
Patients typically describe dull, aching epigastric or right upper quadrant pain that develops gradually over several minutes, persists for 30 minutes to several hours, and then resolves. The pain often radiates to the right scapula, shoulder, or thoracic spine and is frequently triggered by a large or fatty meal. Associated symptoms include anorexia, nausea, and vomiting. Patients are usually afebrile; the presence of fever or chills suggests a complication such as cholecystitis or cholangitis.
Examination findings
On examination, there is tenderness to deep palpation in the right upper quadrant without rebound or guarding. A Murphy sign may be present during an active episode of biliary colic but should resolve once the pain subsides.
Initial evaluation
Assessment includes exclusion of cardiac causes when appropriate, along with basic laboratory testing such as a complete blood count, liver function tests, pancreatic enzymes, urinalysis, and pregnancy testing when indicated. These tests help distinguish uncomplicated biliary colic from complications involving infection, obstruction, or pancreatitis.
Diagnostic studies
Laboratory studies are often normal in uncomplicated cholelithiasis. Leukocytosis or significant liver enzyme abnormalities suggest cholecystitis, cholangitis, or common bile duct obstruction. Ultrasound is the imaging modality of choice, with high sensitivity and specificity for gallstones and the ability to assess bile duct dilation and gallbladder wall changes. Hepatobiliary scintigraphy is useful when cholecystitis is suspected but ultrasound findings are equivocal, though it does not directly visualize stones. Computed tomography is less sensitive for gallstones but may identify complications or alternative diagnoses.
Differential considerations
Conditions that can mimic biliary colic include myocardial infarction, abdominal aortic aneurysm, acute cholecystitis, cholangitis, pancreatitis, renal colic, peptic ulcer disease, pneumonia involving the right lower lobe, hepatitis, and other intra-abdominal emergencies.
Early management
Initial treatment focuses on supportive care. Intravenous access and fluids are provided for patients with vomiting or dehydration, and oral intake is withheld during acute symptoms. Pain control is essential, often with parenteral nonsteroidal anti-inflammatory drugs or opioids combined with antiemetics once the diagnosis is reasonably secure.
Emergency department care
Hydration, analgesia, and antiemetics form the mainstay of treatment for uncomplicated biliary colic. Anticholinergic agents have not demonstrated benefit. Ongoing reassessment is required to ensure symptoms resolve and that no complications develop.
Disposition and follow-up
Patients should be admitted and receive surgical or gastroenterology consultation if there is evidence of cholecystitis, cholangitis, common bile duct obstruction, or gallstone pancreatitis. Discharge may be considered when pain has fully resolved, laboratory and imaging studies show no complications, and the patient can tolerate oral intake. All patients with symptomatic gallstones require referral for surgical evaluation, and those with choledocholithiasis need gastroenterology follow-up.
Clinical pearls
Gallstones detected incidentally on imaging may not be the cause of abdominal pain, so alternative diagnoses must always be considered. Ultrasound is the most accurate initial test for gallstones, while hepatobiliary scintigraphy is particularly useful for diagnosing cystic duct obstruction and acute cholecystitis. Computed tomography may miss non-radiopaque stones and should not be relied upon alone for diagnosis.
Overview and mechanism
Cholelithiasis refers to the presence of gallstones that become symptomatic when they obstruct the cystic duct or common bile duct, disrupting normal bile flow and triggering gallbladder spasm. This produces the characteristic pain of biliary colic. A related functional disorder, biliary dyskinesia, causes identical symptoms despite the absence of stones. When stones migrate into the common bile duct (choledocholithiasis), pain may be more prolonged and is often accompanied by abnormal liver function tests and bilirubin elevation, with risk of complications such as cholangitis or pancreatitis.
Causes and risk factors
Most gallstones are cholesterol stones, which develop when bile becomes supersaturated with cholesterol. Pigment stones account for about one fifth of cases and consist mainly of calcium bilirubinate; they are commonly associated with hemolytic disorders that increase unconjugated bilirubin levels. The incidence of gallstones rises with age and is higher in females, with additional risk factors including obesity, pregnancy, rapid weight loss, Hispanic ethnicity, and medications that promote biliary stasis such as oral contraceptives or ceftriaxone. In children, gallstones are rare and are usually linked to hemolytic anemias such as sickle cell disease or hereditary spherocytosis. Biliary sludge, a nonstone crystalline material, may also cause biliary colic and is associated with pregnancy, rapid weight loss, certain medications, and organ transplantation. Chronic obstruction with calcium deposition can lead to a porcelain gallbladder, a condition associated with an increased risk of gallbladder carcinoma.
Clinical presentation
Patients typically describe dull, aching epigastric or right upper quadrant pain that develops gradually over several minutes, persists for 30 minutes to several hours, and then resolves. The pain often radiates to the right scapula, shoulder, or thoracic spine and is frequently triggered by a large or fatty meal. Associated symptoms include anorexia, nausea, and vomiting. Patients are usually afebrile; the presence of fever or chills suggests a complication such as cholecystitis or cholangitis.
Examination findings
On examination, there is tenderness to deep palpation in the right upper quadrant without rebound or guarding. A Murphy sign may be present during an active episode of biliary colic but should resolve once the pain subsides.
Initial evaluation
Assessment includes exclusion of cardiac causes when appropriate, along with basic laboratory testing such as a complete blood count, liver function tests, pancreatic enzymes, urinalysis, and pregnancy testing when indicated. These tests help distinguish uncomplicated biliary colic from complications involving infection, obstruction, or pancreatitis.
Diagnostic studies
Laboratory studies are often normal in uncomplicated cholelithiasis. Leukocytosis or significant liver enzyme abnormalities suggest cholecystitis, cholangitis, or common bile duct obstruction. Ultrasound is the imaging modality of choice, with high sensitivity and specificity for gallstones and the ability to assess bile duct dilation and gallbladder wall changes. Hepatobiliary scintigraphy is useful when cholecystitis is suspected but ultrasound findings are equivocal, though it does not directly visualize stones. Computed tomography is less sensitive for gallstones but may identify complications or alternative diagnoses.
Differential considerations
Conditions that can mimic biliary colic include myocardial infarction, abdominal aortic aneurysm, acute cholecystitis, cholangitis, pancreatitis, renal colic, peptic ulcer disease, pneumonia involving the right lower lobe, hepatitis, and other intra-abdominal emergencies.
Early management
Initial treatment focuses on supportive care. Intravenous access and fluids are provided for patients with vomiting or dehydration, and oral intake is withheld during acute symptoms. Pain control is essential, often with parenteral nonsteroidal anti-inflammatory drugs or opioids combined with antiemetics once the diagnosis is reasonably secure.
Emergency department care
Hydration, analgesia, and antiemetics form the mainstay of treatment for uncomplicated biliary colic. Anticholinergic agents have not demonstrated benefit. Ongoing reassessment is required to ensure symptoms resolve and that no complications develop.
Disposition and follow-up
Patients should be admitted and receive surgical or gastroenterology consultation if there is evidence of cholecystitis, cholangitis, common bile duct obstruction, or gallstone pancreatitis. Discharge may be considered when pain has fully resolved, laboratory and imaging studies show no complications, and the patient can tolerate oral intake. All patients with symptomatic gallstones require referral for surgical evaluation, and those with choledocholithiasis need gastroenterology follow-up.
Clinical pearls
Gallstones detected incidentally on imaging may not be the cause of abdominal pain, so alternative diagnoses must always be considered. Ultrasound is the most accurate initial test for gallstones, while hepatobiliary scintigraphy is particularly useful for diagnosing cystic duct obstruction and acute cholecystitis. Computed tomography may miss non-radiopaque stones and should not be relied upon alone for diagnosis.
- Published on
Emergency and acute medicine – chancroid
Basic description
Chancroid is a sexually transmitted genital ulcer disease associated with an increased risk of HIV acquisition. It is common in parts of Africa, Southeast Asia, and Latin America but uncommon in the United States, where herpes simplex virus and syphilis are far more frequent causes of genital ulcers. Despite this, chancroid is likely underreported due to diagnostic challenges.
Cause and microbiology
The disease is caused by Haemophilus ducreyi, a highly infectious gram-negative bacterium transmitted through sexual contact.
Clinical presentation
Chancroid typically begins as a small erythematous papule or pustule that rapidly ulcerates into a painful lesion measuring 1–20 mm. The ulcers are soft, friable, and have ragged, irregular borders with an excavated appearance. The base contains moist granulation tissue and may produce purulent or hemorrhagic exudate.
In men, lesions most often involve the penile shaft, glans, foreskin, or anus, whereas in women they may occur on the cervix, vagina, vulva, perineum, or anus. Symptoms usually appear 4–7 days after exposure, with an incubation period ranging from 1–35 days.
Painful inguinal lymphadenopathy develops in approximately half of affected men and less frequently in women. These nodes are typically unilateral, may become suppurative, and can rupture to form chronic draining sinuses. Dysuria and dyspareunia may occur due to lesion contact. Several variants exist, including phagedenic chancroid with rapid tissue destruction, giant chancroid with a single large ulcer, serpiginous ulcers that spread superficially, and follicular chancroid with multiple small perifollicular lesions.
Diagnostic approach
Diagnosis is primarily clinical but often inaccurate because laboratory confirmation is difficult. The Centers for Disease Control and Prevention defines a probable diagnosis as the presence of typical painful genital ulcers with negative testing for syphilis and herpes simplex virus. A definite diagnosis requires isolation of H. ducreyi on culture, which is rarely feasible in routine practice.
Laboratory evaluation
Gram stain is unreliable and shows characteristic gram-negative coccobacilli in a linear “school-of-fish” pattern in only 50–80% of cases. Culture requires specialized media and has variable sensitivity. Polymerase chain reaction testing is sensitive and specific but not widely available. Serologic testing for syphilis, herpes simplex virus, and HIV is recommended because coinfection is common.
Differential diagnosis
Infectious considerations include syphilis, genital herpes, granuloma inguinale, and lymphogranuloma venereum. Noninfectious causes such as drug reactions, pyoderma gangrenosum, and Behçet disease should also be considered when presentation is atypical.
Management principles
Standard infection control precautions should be used during evaluation. Treatment should not be delayed when clinical criteria for probable chancroid are met.
Emergency department treatment
First-line therapy includes single-dose azithromycin or intramuscular ceftriaxone, with ceftriaxone preferred during pregnancy. Alternative regimens include ciprofloxacin for three days (avoided in pregnancy and lactation) or erythromycin for seven days. Suppurative lymph nodes larger than 5 cm should be aspirated with a large-bore needle through intact skin to prevent chronic sinus formation. Patients should undergo concurrent testing for HIV, syphilis, and herpes simplex virus, with repeat testing at three months if initially negative.
Medications
Recommended regimens include azithromycin 1 g orally once or ceftriaxone 250 mg intramuscularly once. Alternatives are ciprofloxacin 500 mg orally twice daily for three days or erythromycin base 500 mg orally four times daily for seven days.
Disposition and follow-up
Patients should abstain from sexual activity or use condoms until complete lesion healing. Clinical improvement is usually seen within two days, with ulcer resolution in 3–7 days, though healing may be delayed in HIV-positive or uncircumcised patients.
Ongoing care recommendations
All sexual partners with exposure within 10 days of symptom onset should be examined and treated regardless of symptoms. HIV-positive patients require close follow-up, particularly when treated with single-dose regimens due to higher failure rates.
Key clinical pearls
Treatment should be initiated based on clinical probability rather than awaiting culture confirmation. Treatment failure should prompt evaluation for nonadherence, antimicrobial resistance, or coinfection, particularly syphilis.
Basic description
Chancroid is a sexually transmitted genital ulcer disease associated with an increased risk of HIV acquisition. It is common in parts of Africa, Southeast Asia, and Latin America but uncommon in the United States, where herpes simplex virus and syphilis are far more frequent causes of genital ulcers. Despite this, chancroid is likely underreported due to diagnostic challenges.
Cause and microbiology
The disease is caused by Haemophilus ducreyi, a highly infectious gram-negative bacterium transmitted through sexual contact.
Clinical presentation
Chancroid typically begins as a small erythematous papule or pustule that rapidly ulcerates into a painful lesion measuring 1–20 mm. The ulcers are soft, friable, and have ragged, irregular borders with an excavated appearance. The base contains moist granulation tissue and may produce purulent or hemorrhagic exudate.
In men, lesions most often involve the penile shaft, glans, foreskin, or anus, whereas in women they may occur on the cervix, vagina, vulva, perineum, or anus. Symptoms usually appear 4–7 days after exposure, with an incubation period ranging from 1–35 days.
Painful inguinal lymphadenopathy develops in approximately half of affected men and less frequently in women. These nodes are typically unilateral, may become suppurative, and can rupture to form chronic draining sinuses. Dysuria and dyspareunia may occur due to lesion contact. Several variants exist, including phagedenic chancroid with rapid tissue destruction, giant chancroid with a single large ulcer, serpiginous ulcers that spread superficially, and follicular chancroid with multiple small perifollicular lesions.
Diagnostic approach
Diagnosis is primarily clinical but often inaccurate because laboratory confirmation is difficult. The Centers for Disease Control and Prevention defines a probable diagnosis as the presence of typical painful genital ulcers with negative testing for syphilis and herpes simplex virus. A definite diagnosis requires isolation of H. ducreyi on culture, which is rarely feasible in routine practice.
Laboratory evaluation
Gram stain is unreliable and shows characteristic gram-negative coccobacilli in a linear “school-of-fish” pattern in only 50–80% of cases. Culture requires specialized media and has variable sensitivity. Polymerase chain reaction testing is sensitive and specific but not widely available. Serologic testing for syphilis, herpes simplex virus, and HIV is recommended because coinfection is common.
Differential diagnosis
Infectious considerations include syphilis, genital herpes, granuloma inguinale, and lymphogranuloma venereum. Noninfectious causes such as drug reactions, pyoderma gangrenosum, and Behçet disease should also be considered when presentation is atypical.
Management principles
Standard infection control precautions should be used during evaluation. Treatment should not be delayed when clinical criteria for probable chancroid are met.
Emergency department treatment
First-line therapy includes single-dose azithromycin or intramuscular ceftriaxone, with ceftriaxone preferred during pregnancy. Alternative regimens include ciprofloxacin for three days (avoided in pregnancy and lactation) or erythromycin for seven days. Suppurative lymph nodes larger than 5 cm should be aspirated with a large-bore needle through intact skin to prevent chronic sinus formation. Patients should undergo concurrent testing for HIV, syphilis, and herpes simplex virus, with repeat testing at three months if initially negative.
Medications
Recommended regimens include azithromycin 1 g orally once or ceftriaxone 250 mg intramuscularly once. Alternatives are ciprofloxacin 500 mg orally twice daily for three days or erythromycin base 500 mg orally four times daily for seven days.
Disposition and follow-up
Patients should abstain from sexual activity or use condoms until complete lesion healing. Clinical improvement is usually seen within two days, with ulcer resolution in 3–7 days, though healing may be delayed in HIV-positive or uncircumcised patients.
Ongoing care recommendations
All sexual partners with exposure within 10 days of symptom onset should be examined and treated regardless of symptoms. HIV-positive patients require close follow-up, particularly when treated with single-dose regimens due to higher failure rates.
Key clinical pearls
Treatment should be initiated based on clinical probability rather than awaiting culture confirmation. Treatment failure should prompt evaluation for nonadherence, antimicrobial resistance, or coinfection, particularly syphilis.
- Published on
Emergency And Acute Medicine – Cirrhosis
Overview And Pathophysiology
Cirrhosis is a progressive and chronic disease marked by ongoing inflammation, hepatocellular injury and necrosis, diffuse fibrosis, and the formation of regenerative nodules. These changes lead to distortion and eventual loss of normal hepatic lobular and vascular architecture. In advanced stages, cirrhosis is irreversible and results in intrahepatic portal hypertension due to increased sinusoidal resistance, compression of central veins, and abnormal arterial–portal venous shunting. Cirrhosis is a major public health concern and is among the leading causes of death in the United States.
Etiology And Risk Factors
Chronic alcohol abuse is the most common cause of cirrhosis in the United States, followed by chronic viral hepatitis B and C. Other causes include autoimmune hepatitis, primary biliary cirrhosis, secondary biliary cirrhosis from sclerosing cholangitis, and metabolic disorders such as hereditary hemochromatosis, Wilson disease, and porphyria. Drug-induced liver injury from agents such as acetaminophen, methotrexate, amiodarone, and methyldopa may contribute. Hepatic congestion from right-sided heart failure, constrictive pericarditis, or Budd–Chiari syndrome can lead to cirrhosis. Infiltrative diseases, nonalcoholic steatohepatitis, diffuse hepatocellular carcinoma, and chronic infections such as schistosomiasis or tertiary syphilis are less common causes. Pediatric causes include congenital biliary disorders, metabolic diseases, cystic fibrosis, and α1-antitrypsin deficiency.
Clinical Presentation
Cirrhosis may remain asymptomatic for years or present insidiously with nonspecific complaints such as fatigue, malaise, anorexia, nausea, weight loss, pruritus, and jaundice. Physical findings may include hepatomegaly, splenomegaly, abdominal discomfort, collateral venous circulation with caput medusae, palmar erythema, spider telangiectasias, parotid enlargement, clubbing, and nail changes. Endocrine manifestations include gynecomastia, testicular atrophy, impotence, amenorrhea, and loss of libido. Advanced disease may present with hypotension, fever, fetor hepaticus, asterixis, renal dysfunction, and signs of portal hypertension.
Complications And Decompensated Disease
The development of complications defines decompensated cirrhosis. These include ascites, spontaneous bacterial peritonitis, hepatic encephalopathy, and variceal hemorrhage. Hepatic encephalopathy may be precipitated by gastrointestinal bleeding, infection, excessive dietary protein, electrolyte abnormalities, sedatives, constipation, or renal failure. Variceal bleeding occurs in approximately one-third of patients and carries a high mortality rate with each episode. Other complications include portal hypertensive gastropathy, hepatorenal syndrome due to reduced renal perfusion, and hepatopulmonary syndrome characterized by intrapulmonary vascular dilation and hypoxemia.
Diagnostic Evaluation
Diagnosis relies on a thorough history and physical examination supported by laboratory and imaging studies. Laboratory findings may include anemia, macrocytosis, leukopenia, thrombocytopenia, hypoalbuminemia, hyperbilirubinemia, prolonged prothrombin time, and elevated globulins. Transaminase levels reflect ongoing injury, with an AST to ALT ratio greater than two suggesting alcoholic liver disease. Additional testing is directed at identifying the underlying cause and complications, including viral hepatitis serologies, autoimmune markers, iron studies, ceruloplasmin, α1-antitrypsin levels, and α-fetoprotein. Ultrasound is used to assess liver architecture, ascites, splenomegaly, and portal vein patency, while CT imaging further evaluates abnormal findings. Endoscopy is indicated for variceal surveillance or upper gastrointestinal bleeding, and paracentesis is essential for new or worsening ascites or suspected spontaneous bacterial peritonitis.
Emergency And Acute Management
Initial management focuses on stabilizing the patient and treating life-threatening complications. Altered mental status should prompt administration of dextrose, thiamine, and naloxone as indicated. Hypotension should be corrected with intravenous fluids to prevent ischemic liver injury. Suspected variceal bleeding requires proton pump inhibitors, octreotide infusion, correction of coagulopathy, and urgent endoscopic intervention. Broad-spectrum antibiotics are indicated for suspected sepsis or spontaneous bacterial peritonitis. Hepatic encephalopathy is treated with lactulose and correction of precipitating factors. Ascites management includes sodium restriction, diuretics, and therapeutic paracentesis when necessary.
Definitive And Specialized Therapy
Treatment of underlying etiologies includes phlebotomy or chelation for hemochromatosis, immunosuppressive therapy for autoimmune hepatitis, antiviral therapy for chronic viral hepatitis when appropriate, ursodeoxycholic acid for primary biliary cirrhosis, and chelation therapy for Wilson disease. Nonselective β-blockers reduce the risk of variceal bleeding. Nutritional support with adequate calories and protein is essential unless limited by encephalopathy. Liver transplantation remains the only curative option for advanced cirrhosis.
Disposition And Follow-Up
Patients with acute decompensation, gastrointestinal bleeding, sepsis, advanced hepatic encephalopathy, hepatorenal syndrome, or hepatopulmonary syndrome require hospital admission, often to an intensive care unit. Patients with compensated cirrhosis and no acute complications may be managed as outpatients with close gastroenterology follow-up. All newly diagnosed patients should be referred for specialist evaluation and long-term management.
Clinical Pearls And Pitfalls
Cirrhosis presents with a wide range of clinical manifestations, and prognosis varies significantly depending on disease severity and complications. Any complication signals transition to decompensated disease and worsens prognosis. Symptoms of spontaneous bacterial peritonitis may be subtle, requiring a low threshold for diagnostic paracentesis. Early recognition and aggressive management of complications are critical to improving outcomes.
Overview And Pathophysiology
Cirrhosis is a progressive and chronic disease marked by ongoing inflammation, hepatocellular injury and necrosis, diffuse fibrosis, and the formation of regenerative nodules. These changes lead to distortion and eventual loss of normal hepatic lobular and vascular architecture. In advanced stages, cirrhosis is irreversible and results in intrahepatic portal hypertension due to increased sinusoidal resistance, compression of central veins, and abnormal arterial–portal venous shunting. Cirrhosis is a major public health concern and is among the leading causes of death in the United States.
Etiology And Risk Factors
Chronic alcohol abuse is the most common cause of cirrhosis in the United States, followed by chronic viral hepatitis B and C. Other causes include autoimmune hepatitis, primary biliary cirrhosis, secondary biliary cirrhosis from sclerosing cholangitis, and metabolic disorders such as hereditary hemochromatosis, Wilson disease, and porphyria. Drug-induced liver injury from agents such as acetaminophen, methotrexate, amiodarone, and methyldopa may contribute. Hepatic congestion from right-sided heart failure, constrictive pericarditis, or Budd–Chiari syndrome can lead to cirrhosis. Infiltrative diseases, nonalcoholic steatohepatitis, diffuse hepatocellular carcinoma, and chronic infections such as schistosomiasis or tertiary syphilis are less common causes. Pediatric causes include congenital biliary disorders, metabolic diseases, cystic fibrosis, and α1-antitrypsin deficiency.
Clinical Presentation
Cirrhosis may remain asymptomatic for years or present insidiously with nonspecific complaints such as fatigue, malaise, anorexia, nausea, weight loss, pruritus, and jaundice. Physical findings may include hepatomegaly, splenomegaly, abdominal discomfort, collateral venous circulation with caput medusae, palmar erythema, spider telangiectasias, parotid enlargement, clubbing, and nail changes. Endocrine manifestations include gynecomastia, testicular atrophy, impotence, amenorrhea, and loss of libido. Advanced disease may present with hypotension, fever, fetor hepaticus, asterixis, renal dysfunction, and signs of portal hypertension.
Complications And Decompensated Disease
The development of complications defines decompensated cirrhosis. These include ascites, spontaneous bacterial peritonitis, hepatic encephalopathy, and variceal hemorrhage. Hepatic encephalopathy may be precipitated by gastrointestinal bleeding, infection, excessive dietary protein, electrolyte abnormalities, sedatives, constipation, or renal failure. Variceal bleeding occurs in approximately one-third of patients and carries a high mortality rate with each episode. Other complications include portal hypertensive gastropathy, hepatorenal syndrome due to reduced renal perfusion, and hepatopulmonary syndrome characterized by intrapulmonary vascular dilation and hypoxemia.
Diagnostic Evaluation
Diagnosis relies on a thorough history and physical examination supported by laboratory and imaging studies. Laboratory findings may include anemia, macrocytosis, leukopenia, thrombocytopenia, hypoalbuminemia, hyperbilirubinemia, prolonged prothrombin time, and elevated globulins. Transaminase levels reflect ongoing injury, with an AST to ALT ratio greater than two suggesting alcoholic liver disease. Additional testing is directed at identifying the underlying cause and complications, including viral hepatitis serologies, autoimmune markers, iron studies, ceruloplasmin, α1-antitrypsin levels, and α-fetoprotein. Ultrasound is used to assess liver architecture, ascites, splenomegaly, and portal vein patency, while CT imaging further evaluates abnormal findings. Endoscopy is indicated for variceal surveillance or upper gastrointestinal bleeding, and paracentesis is essential for new or worsening ascites or suspected spontaneous bacterial peritonitis.
Emergency And Acute Management
Initial management focuses on stabilizing the patient and treating life-threatening complications. Altered mental status should prompt administration of dextrose, thiamine, and naloxone as indicated. Hypotension should be corrected with intravenous fluids to prevent ischemic liver injury. Suspected variceal bleeding requires proton pump inhibitors, octreotide infusion, correction of coagulopathy, and urgent endoscopic intervention. Broad-spectrum antibiotics are indicated for suspected sepsis or spontaneous bacterial peritonitis. Hepatic encephalopathy is treated with lactulose and correction of precipitating factors. Ascites management includes sodium restriction, diuretics, and therapeutic paracentesis when necessary.
Definitive And Specialized Therapy
Treatment of underlying etiologies includes phlebotomy or chelation for hemochromatosis, immunosuppressive therapy for autoimmune hepatitis, antiviral therapy for chronic viral hepatitis when appropriate, ursodeoxycholic acid for primary biliary cirrhosis, and chelation therapy for Wilson disease. Nonselective β-blockers reduce the risk of variceal bleeding. Nutritional support with adequate calories and protein is essential unless limited by encephalopathy. Liver transplantation remains the only curative option for advanced cirrhosis.
Disposition And Follow-Up
Patients with acute decompensation, gastrointestinal bleeding, sepsis, advanced hepatic encephalopathy, hepatorenal syndrome, or hepatopulmonary syndrome require hospital admission, often to an intensive care unit. Patients with compensated cirrhosis and no acute complications may be managed as outpatients with close gastroenterology follow-up. All newly diagnosed patients should be referred for specialist evaluation and long-term management.
Clinical Pearls And Pitfalls
Cirrhosis presents with a wide range of clinical manifestations, and prognosis varies significantly depending on disease severity and complications. Any complication signals transition to decompensated disease and worsens prognosis. Symptoms of spontaneous bacterial peritonitis may be subtle, requiring a low threshold for diagnostic paracentesis. Early recognition and aggressive management of complications are critical to improving outcomes.
- Published on
Emergency And Acute Medicine – Chronic Obstructive Pulmonary Disease
Overview And Disease Process
Chronic obstructive pulmonary disease (COPD) is the third leading cause of death in the United States and affects approximately 10% of the population, including nearly half of long-term smokers. It is characterized by persistent airflow limitation resulting from a combination of emphysema, chronic bronchitis, and components of reactive airway disease. Emphysema involves irreversible alveolar destruction with loss of elastic recoil, while chronic bronchitis is defined by airway inflammation without alveolar damage. Reactive airway disease contributes reversible bronchospasm, mucus plugging, and mucosal edema. Patients frequently have comorbid hypertension, diabetes, heart failure, and cardiovascular disease. Recurrent exacerbations are associated with increased mortality, faster decline in lung function, poorer quality of life, and higher rates of hospitalization.
Risk Factors And Causes
Cigarette smoking is the primary cause, with COPD developing in approximately 15% of smokers. Additional risk factors include air pollution, airway hyperresponsiveness, genetic conditions such as α1-antitrypsin deficiency, and possible autoimmune mechanisms. Acute exacerbations are most commonly triggered by infections. Viral infections account for more than half of exacerbations, particularly rhinovirus and respiratory syncytial virus. Bacterial pathogens are isolated in 40–60% of cases, most often Haemophilus influenzae, Moraxella catarrhalis, and Streptococcus pneumoniae. Exacerbations are more likely when dyspnea worsens, sputum volume increases, and sputum becomes purulent. Environmental pollutants, reduced immunity, and seasonal variation—especially winter months—also contribute.
Clinical Presentation
Patients commonly report progressive dyspnea on exertion, chronic cough, sputum production, wheezing, fatigue, and sometimes orthopnea. In advanced cases, altered mental status may occur due to carbon dioxide retention. Physical examination may reveal wheezing, prolonged expiratory phase, decreased air movement, use of accessory muscles, barrel chest, cyanosis, jugular venous distension, peripheral edema, and cardiac gallops. Severe disease may lead to carbon dioxide narcosis with confusion or somnolence.
Diagnostic Evaluation
Laboratory studies may show secondary polycythemia from chronic hypoxemia or leukocytosis during infectious exacerbations. Arterial blood gas analysis often demonstrates hypercapnia with or without acidosis and impaired oxygenation. β-natriuretic peptide testing may help differentiate COPD exacerbation from heart failure. Chest radiography is used to identify pneumonia, pneumothorax, heart failure, or lobar collapse, while computed tomography is reserved for suspected pulmonary embolism or further disease characterization. Pulse oximetry, electrocardiography, pulmonary function testing, and echocardiography are useful adjuncts depending on clinical context.
Differential Diagnosis
Conditions that may mimic or coexist with a COPD exacerbation include pneumothorax, pneumonia, congestive heart failure, pulmonary embolism, asthma, upper airway obstruction, restrictive lung disease, acute respiratory distress syndrome, pleural effusion, acute coronary syndrome, pericardial effusion, and metabolic derangements.
Early And Emergency Management
Initial prehospital and emergency care focuses on supplemental oxygen and rapid bronchodilation. Oxygen should not be withheld due to fear of carbon dioxide retention; instead, patients should be closely monitored. In the emergency department, oxygen therapy is titrated to maintain oxygen saturation above 90–92%, with careful observation for hypoventilation. Noninvasive positive pressure ventilation is the preferred method of ventilatory support for hypercapnic respiratory failure and can often prevent intubation. Endotracheal intubation is reserved for patients with clinical fatigue, worsening mental status, inability to tolerate therapy, or ineffective ventilation.
Definitive Treatment
Management includes continuous cardiac and oxygen monitoring, inhaled short-acting β-agonists and anticholinergics, and systemic corticosteroids to reduce airway inflammation and relapse risk. Antibiotics are indicated when fever, increased sputum production, or worsening dyspnea suggests bacterial infection, with macrolides offering potential additional anti-inflammatory benefit. Ventilator strategies should allow sufficient expiratory time to minimize air trapping, accepting permissive hypercapnia when necessary.
Disposition And Follow-Up
Intensive care admission is required for patients needing intubation, those with severe acidosis, refractory hypoxemia, carbon dioxide narcosis, or significant comorbid cardiac or pulmonary disease. Hospital admission is appropriate for patients with pneumonia, lobar collapse, increased work of breathing, or failure to improve with emergency treatment. Discharge may be considered for mild exacerbations that resolve in the emergency department with stable oxygen saturation above 92%. Long-term management includes smoking cessation, vaccination against influenza and pneumococcus, trigger avoidance, and consideration of specialist referral for advanced therapies such as lung volume reduction surgery.
Clinical Pearls And Pitfalls
Noninvasive positive pressure ventilation is the therapy of choice when optimal medical treatment is insufficient. Patients with COPD are at increased risk for cardiovascular disease, diabetes, and hypertension, emphasizing the importance of preventive care. Routine immunization and early recognition of exacerbations are essential to improving outcomes.
Overview And Disease Process
Chronic obstructive pulmonary disease (COPD) is the third leading cause of death in the United States and affects approximately 10% of the population, including nearly half of long-term smokers. It is characterized by persistent airflow limitation resulting from a combination of emphysema, chronic bronchitis, and components of reactive airway disease. Emphysema involves irreversible alveolar destruction with loss of elastic recoil, while chronic bronchitis is defined by airway inflammation without alveolar damage. Reactive airway disease contributes reversible bronchospasm, mucus plugging, and mucosal edema. Patients frequently have comorbid hypertension, diabetes, heart failure, and cardiovascular disease. Recurrent exacerbations are associated with increased mortality, faster decline in lung function, poorer quality of life, and higher rates of hospitalization.
Risk Factors And Causes
Cigarette smoking is the primary cause, with COPD developing in approximately 15% of smokers. Additional risk factors include air pollution, airway hyperresponsiveness, genetic conditions such as α1-antitrypsin deficiency, and possible autoimmune mechanisms. Acute exacerbations are most commonly triggered by infections. Viral infections account for more than half of exacerbations, particularly rhinovirus and respiratory syncytial virus. Bacterial pathogens are isolated in 40–60% of cases, most often Haemophilus influenzae, Moraxella catarrhalis, and Streptococcus pneumoniae. Exacerbations are more likely when dyspnea worsens, sputum volume increases, and sputum becomes purulent. Environmental pollutants, reduced immunity, and seasonal variation—especially winter months—also contribute.
Clinical Presentation
Patients commonly report progressive dyspnea on exertion, chronic cough, sputum production, wheezing, fatigue, and sometimes orthopnea. In advanced cases, altered mental status may occur due to carbon dioxide retention. Physical examination may reveal wheezing, prolonged expiratory phase, decreased air movement, use of accessory muscles, barrel chest, cyanosis, jugular venous distension, peripheral edema, and cardiac gallops. Severe disease may lead to carbon dioxide narcosis with confusion or somnolence.
Diagnostic Evaluation
Laboratory studies may show secondary polycythemia from chronic hypoxemia or leukocytosis during infectious exacerbations. Arterial blood gas analysis often demonstrates hypercapnia with or without acidosis and impaired oxygenation. β-natriuretic peptide testing may help differentiate COPD exacerbation from heart failure. Chest radiography is used to identify pneumonia, pneumothorax, heart failure, or lobar collapse, while computed tomography is reserved for suspected pulmonary embolism or further disease characterization. Pulse oximetry, electrocardiography, pulmonary function testing, and echocardiography are useful adjuncts depending on clinical context.
Differential Diagnosis
Conditions that may mimic or coexist with a COPD exacerbation include pneumothorax, pneumonia, congestive heart failure, pulmonary embolism, asthma, upper airway obstruction, restrictive lung disease, acute respiratory distress syndrome, pleural effusion, acute coronary syndrome, pericardial effusion, and metabolic derangements.
Early And Emergency Management
Initial prehospital and emergency care focuses on supplemental oxygen and rapid bronchodilation. Oxygen should not be withheld due to fear of carbon dioxide retention; instead, patients should be closely monitored. In the emergency department, oxygen therapy is titrated to maintain oxygen saturation above 90–92%, with careful observation for hypoventilation. Noninvasive positive pressure ventilation is the preferred method of ventilatory support for hypercapnic respiratory failure and can often prevent intubation. Endotracheal intubation is reserved for patients with clinical fatigue, worsening mental status, inability to tolerate therapy, or ineffective ventilation.
Definitive Treatment
Management includes continuous cardiac and oxygen monitoring, inhaled short-acting β-agonists and anticholinergics, and systemic corticosteroids to reduce airway inflammation and relapse risk. Antibiotics are indicated when fever, increased sputum production, or worsening dyspnea suggests bacterial infection, with macrolides offering potential additional anti-inflammatory benefit. Ventilator strategies should allow sufficient expiratory time to minimize air trapping, accepting permissive hypercapnia when necessary.
Disposition And Follow-Up
Intensive care admission is required for patients needing intubation, those with severe acidosis, refractory hypoxemia, carbon dioxide narcosis, or significant comorbid cardiac or pulmonary disease. Hospital admission is appropriate for patients with pneumonia, lobar collapse, increased work of breathing, or failure to improve with emergency treatment. Discharge may be considered for mild exacerbations that resolve in the emergency department with stable oxygen saturation above 92%. Long-term management includes smoking cessation, vaccination against influenza and pneumococcus, trigger avoidance, and consideration of specialist referral for advanced therapies such as lung volume reduction surgery.
Clinical Pearls And Pitfalls
Noninvasive positive pressure ventilation is the therapy of choice when optimal medical treatment is insufficient. Patients with COPD are at increased risk for cardiovascular disease, diabetes, and hypertension, emphasizing the importance of preventive care. Routine immunization and early recognition of exacerbations are essential to improving outcomes.
- Published on
Emergency and acute medicine – acute cholecystitis
Definition and pathogenesis
Acute cholecystitis refers to inflammation of the gallbladder, most often resulting from obstruction of bile flow. The condition is usually precipitated by prolonged blockage of the gallbladder neck or cystic duct, leading to bile stasis, rising intraluminal pressure, mucosal injury, and subsequent inflammatory changes such as edema and increased vascularity.
Underlying causes
The most common form is acute calculous cholecystitis, caused by gallstone obstruction in the gallbladder neck, cystic duct, or occasionally the common bile duct. Secondary bacterial infection with coliforms and anaerobes may occur, although their primary role remains debated. Acalculous cholecystitis accounts for roughly 10% of cases and typically develops in critically ill patients due to biliary stasis and gallbladder ischemia, followed by inflammation and infection. In children, calculous cholecystitis is rare, whereas the acalculous form is more common and often associated with systemic infections such as sepsis, scarlet fever, Kawasaki disease, or parasitic illness.
Clinical features
Patients with calculous cholecystitis usually present with dull, aching epigastric or right upper quadrant pain that may radiate to the right scapula, shoulder, or thoracic spine. Pain persisting longer than six hours favors cholecystitis over uncomplicated biliary colic. As inflammation progresses, pain becomes sharper and more localized due to parietal peritoneal irritation. Nausea, vomiting, fever, and chills are common but not universal, and jaundice occurs in a minority of patients. A history of prior biliary colic or known gallstones supports the diagnosis. In contrast, acalculous cholecystitis often presents atypically in critically ill patients, with minimal localized abdominal pain and features of sepsis without an obvious source.
Physical examination findings
Localized right upper quadrant tenderness with percussion sensitivity or rebound may develop as inflammation advances. A positive Murphy sign—sudden inspiratory arrest during gentle palpation of the right upper quadrant—is present in most cases. In severe disease, signs of peritonitis or systemic toxicity may be evident.
Initial evaluation
Essential investigations include a complete blood count, liver function tests, amylase and lipase, urinalysis, and pregnancy testing when appropriate. Electrocardiography is recommended in patients at risk for coronary artery disease to exclude cardiac causes of pain. Imaging with right upper quadrant ultrasound is the preferred initial diagnostic test, with hepatobiliary scintigraphy reserved for equivocal cases or suspected acalculous cholecystitis.
Laboratory and imaging characteristics
Leukocytosis supports the diagnosis but may be absent in many patients. Liver enzymes and pancreatic markers are usually normal or only mildly elevated; disproportionate elevations in bilirubin or alkaline phosphatase raise concern for common bile duct obstruction or cholangitis. Ultrasound typically demonstrates gallbladder wall thickening, pericholecystic fluid, or gallstones and has high sensitivity and specificity. Hepatobiliary scintigraphy is highly sensitive and specific when ultrasound findings are inconclusive. CT imaging is useful to exclude complications such as perforation, emphysematous cholecystitis, or alternative intra-abdominal pathology.
Diagnostic considerations
Conditions that may mimic acute cholecystitis include biliary colic, cholangitis, hepatitis, hepatic abscess, pancreatitis, peptic ulcer disease, intestinal perforation, right lower lobe pneumonia, myocardial infarction, abdominal aortic aneurysm, appendicitis, and pyelonephritis.
Early management
Initial treatment focuses on supportive care, including intravenous access, fluid resuscitation for dehydration or sepsis, supplemental oxygen, and cardiac monitoring until myocardial ischemia is excluded. Patients should be kept nil per os, with nasogastric decompression if vomiting or ileus is present.
Emergency department therapy
Broad-spectrum intravenous antibiotics covering gram-negative coliforms, anaerobes, and Enterococcus species should be started promptly. Suitable regimens include beta-lactam/beta-lactamase inhibitor combinations, with aminoglycosides added if sepsis or cholangitis is suspected. Alternative regimens are required for patients with penicillin allergy. Antiemetics and opioid analgesics may be administered once the diagnosis is reasonably secure, with caution regarding sphincter of Oddi spasm. Early surgical consultation is mandatory.
Disposition and follow-up
All patients with acute cholecystitis require hospital admission for intravenous antibiotics, analgesia, fluid management, and definitive surgical treatment, typically cholecystectomy within 24–72 hours. Unstable patients or those with complications such as perforation or sepsis require urgent operative intervention. Discharge from the emergency department is not appropriate.
Clinical pearls
Ultrasound is the first-line imaging modality in suspected cholecystitis. Hepatobiliary scintigraphy should be obtained when ultrasound is inconclusive or acalculous cholecystitis is suspected. Early recognition, prompt antibiotics, and timely surgical involvement are essential to prevent complications.
Definition and pathogenesis
Acute cholecystitis refers to inflammation of the gallbladder, most often resulting from obstruction of bile flow. The condition is usually precipitated by prolonged blockage of the gallbladder neck or cystic duct, leading to bile stasis, rising intraluminal pressure, mucosal injury, and subsequent inflammatory changes such as edema and increased vascularity.
Underlying causes
The most common form is acute calculous cholecystitis, caused by gallstone obstruction in the gallbladder neck, cystic duct, or occasionally the common bile duct. Secondary bacterial infection with coliforms and anaerobes may occur, although their primary role remains debated. Acalculous cholecystitis accounts for roughly 10% of cases and typically develops in critically ill patients due to biliary stasis and gallbladder ischemia, followed by inflammation and infection. In children, calculous cholecystitis is rare, whereas the acalculous form is more common and often associated with systemic infections such as sepsis, scarlet fever, Kawasaki disease, or parasitic illness.
Clinical features
Patients with calculous cholecystitis usually present with dull, aching epigastric or right upper quadrant pain that may radiate to the right scapula, shoulder, or thoracic spine. Pain persisting longer than six hours favors cholecystitis over uncomplicated biliary colic. As inflammation progresses, pain becomes sharper and more localized due to parietal peritoneal irritation. Nausea, vomiting, fever, and chills are common but not universal, and jaundice occurs in a minority of patients. A history of prior biliary colic or known gallstones supports the diagnosis. In contrast, acalculous cholecystitis often presents atypically in critically ill patients, with minimal localized abdominal pain and features of sepsis without an obvious source.
Physical examination findings
Localized right upper quadrant tenderness with percussion sensitivity or rebound may develop as inflammation advances. A positive Murphy sign—sudden inspiratory arrest during gentle palpation of the right upper quadrant—is present in most cases. In severe disease, signs of peritonitis or systemic toxicity may be evident.
Initial evaluation
Essential investigations include a complete blood count, liver function tests, amylase and lipase, urinalysis, and pregnancy testing when appropriate. Electrocardiography is recommended in patients at risk for coronary artery disease to exclude cardiac causes of pain. Imaging with right upper quadrant ultrasound is the preferred initial diagnostic test, with hepatobiliary scintigraphy reserved for equivocal cases or suspected acalculous cholecystitis.
Laboratory and imaging characteristics
Leukocytosis supports the diagnosis but may be absent in many patients. Liver enzymes and pancreatic markers are usually normal or only mildly elevated; disproportionate elevations in bilirubin or alkaline phosphatase raise concern for common bile duct obstruction or cholangitis. Ultrasound typically demonstrates gallbladder wall thickening, pericholecystic fluid, or gallstones and has high sensitivity and specificity. Hepatobiliary scintigraphy is highly sensitive and specific when ultrasound findings are inconclusive. CT imaging is useful to exclude complications such as perforation, emphysematous cholecystitis, or alternative intra-abdominal pathology.
Diagnostic considerations
Conditions that may mimic acute cholecystitis include biliary colic, cholangitis, hepatitis, hepatic abscess, pancreatitis, peptic ulcer disease, intestinal perforation, right lower lobe pneumonia, myocardial infarction, abdominal aortic aneurysm, appendicitis, and pyelonephritis.
Early management
Initial treatment focuses on supportive care, including intravenous access, fluid resuscitation for dehydration or sepsis, supplemental oxygen, and cardiac monitoring until myocardial ischemia is excluded. Patients should be kept nil per os, with nasogastric decompression if vomiting or ileus is present.
Emergency department therapy
Broad-spectrum intravenous antibiotics covering gram-negative coliforms, anaerobes, and Enterococcus species should be started promptly. Suitable regimens include beta-lactam/beta-lactamase inhibitor combinations, with aminoglycosides added if sepsis or cholangitis is suspected. Alternative regimens are required for patients with penicillin allergy. Antiemetics and opioid analgesics may be administered once the diagnosis is reasonably secure, with caution regarding sphincter of Oddi spasm. Early surgical consultation is mandatory.
Disposition and follow-up
All patients with acute cholecystitis require hospital admission for intravenous antibiotics, analgesia, fluid management, and definitive surgical treatment, typically cholecystectomy within 24–72 hours. Unstable patients or those with complications such as perforation or sepsis require urgent operative intervention. Discharge from the emergency department is not appropriate.
Clinical pearls
Ultrasound is the first-line imaging modality in suspected cholecystitis. Hepatobiliary scintigraphy should be obtained when ultrasound is inconclusive or acalculous cholecystitis is suspected. Early recognition, prompt antibiotics, and timely surgical involvement are essential to prevent complications.
- Published on
Emergency and acute medicine – acute cholangitis
Overview and pathophysiology
Acute cholangitis is a purulent infection of the biliary tree that develops when there is partial or complete obstruction of the common bile duct. Obstruction may be caused by gallstones, tumors, cysts, or strictures, leading to increased intraluminal pressure and bacterial overgrowth. This process commonly results in bacteremia and sepsis and may extend to involve the liver and gallbladder. Mirizzi syndrome refers to bile duct obstruction caused by extrinsic compression from gallbladder or cystic duct stones or edema.
Causative factors
Infection typically arises from ascending bacteria originating in the duodenum, gallbladder infection, portal venous seeding, hematogenous spread with hepatic secretion, or lymphatic spread. Common organisms include intestinal coliforms such as Escherichia coli, Enterococcus species, and anaerobes including Bacteroides and Clostridium. In patients with AIDS, sclerosing cholangitis may occur, characterized by papillary stenosis, sclerosing cholangitis, and extrahepatic biliary obstruction; organisms such as cytomegalovirus, Cryptosporidium, and microsporidia are frequently isolated, although their exact causal role remains uncertain.
Clinical presentation
The classic presentation is Charcot triad, consisting of fever with chills, right upper quadrant abdominal pain, and jaundice, although all three features are present in only about half of patients. Progression to hypotension and altered mental status indicates severe biliary sepsis, known as Reynolds pentad. Abdominal pain is present in most patients and usually localizes to the right upper quadrant. Fever is common, while clinically apparent jaundice may be absent in a significant proportion of cases. In AIDS-related cholangitis, symptoms tend to be more indolent, with relatively normal bilirubin levels.
Initial evaluation
Early evaluation should include assessment for sepsis and organ dysfunction. Recommended studies include complete blood count, liver function tests, amylase and lipase, urinalysis, blood cultures, and electrocardiography in patients at risk for cardiac disease. Right upper quadrant ultrasound is the initial imaging study of choice to assess for biliary dilation and gallstones, with hepatobiliary scintigraphy considered when ultrasound findings are inconclusive.
Laboratory and imaging findings
Laboratory testing typically demonstrates leukocytosis with a left shift, unless the patient is immunocompromised or in advanced sepsis. Liver function tests show a cholestatic pattern with elevated direct bilirubin and alkaline phosphatase, while transaminase elevations are usually mild. Amylase and lipase are normal or only slightly elevated. Ultrasound helps identify the level of obstruction and gallstone etiology. Hepatobiliary scintigraphy is sensitive early in the disease before ductal dilation develops. CT imaging may assist in excluding alternative diagnoses. MR cholangiopancreatography is highly accurate but generally unnecessary if therapeutic ERCP is planned.
Differential considerations
Conditions that may mimic cholangitis include acute cholecystitis, hepatitis, hepatic abscess, acute pancreatitis, right-sided pyelonephritis, right lower lobe pneumonia or pulmonary embolism, perforated peptic ulcer, appendicitis, and sepsis with nonspecific liver enzyme elevation.
Early management
Initial management focuses on aggressive treatment of sepsis. Prompt intravenous fluid resuscitation is essential to correct dehydration and hemodynamic compromise. Most patients show clinical improvement within the first 24 hours of appropriate antibiotic therapy. Vasopressors may be required for hypotension refractory to fluids.
Emergency department treatment
Broad-spectrum intravenous antibiotics should be initiated early to cover gram-negative coliforms, anaerobes, and Enterococcus. Acceptable regimens include beta-lactam/beta-lactamase inhibitor combinations, carbapenems, or combination therapy with an aminoglycoside. Alternative regimens should be used in patients with penicillin allergy or renal insufficiency. Patients should be kept nil per os, with nasogastric decompression if vomiting or ileus is present. Analgesia and antiemetics may be provided once hemodynamic stability is ensured. Early gastroenterology and surgical consultation is mandatory. If there is no clinical response within 12–24 hours, urgent biliary decompression via ERCP, percutaneous drainage, or surgery is required.
Disposition and follow-up
All patients with acute cholangitis require hospital admission, with intensive care unit placement for those with septic shock or organ failure. There are no criteria for emergency department discharge. Definitive management involves continued intravenous antibiotics and timely biliary drainage when indicated.
Key clinical points
Acute cholangitis is a medical emergency with high risk of sepsis. Early recognition, aggressive fluid resuscitation, prompt administration of broad-spectrum antibiotics, and rapid consultation for biliary drainage are critical to improving outcomes.
Overview and pathophysiology
Acute cholangitis is a purulent infection of the biliary tree that develops when there is partial or complete obstruction of the common bile duct. Obstruction may be caused by gallstones, tumors, cysts, or strictures, leading to increased intraluminal pressure and bacterial overgrowth. This process commonly results in bacteremia and sepsis and may extend to involve the liver and gallbladder. Mirizzi syndrome refers to bile duct obstruction caused by extrinsic compression from gallbladder or cystic duct stones or edema.
Causative factors
Infection typically arises from ascending bacteria originating in the duodenum, gallbladder infection, portal venous seeding, hematogenous spread with hepatic secretion, or lymphatic spread. Common organisms include intestinal coliforms such as Escherichia coli, Enterococcus species, and anaerobes including Bacteroides and Clostridium. In patients with AIDS, sclerosing cholangitis may occur, characterized by papillary stenosis, sclerosing cholangitis, and extrahepatic biliary obstruction; organisms such as cytomegalovirus, Cryptosporidium, and microsporidia are frequently isolated, although their exact causal role remains uncertain.
Clinical presentation
The classic presentation is Charcot triad, consisting of fever with chills, right upper quadrant abdominal pain, and jaundice, although all three features are present in only about half of patients. Progression to hypotension and altered mental status indicates severe biliary sepsis, known as Reynolds pentad. Abdominal pain is present in most patients and usually localizes to the right upper quadrant. Fever is common, while clinically apparent jaundice may be absent in a significant proportion of cases. In AIDS-related cholangitis, symptoms tend to be more indolent, with relatively normal bilirubin levels.
Initial evaluation
Early evaluation should include assessment for sepsis and organ dysfunction. Recommended studies include complete blood count, liver function tests, amylase and lipase, urinalysis, blood cultures, and electrocardiography in patients at risk for cardiac disease. Right upper quadrant ultrasound is the initial imaging study of choice to assess for biliary dilation and gallstones, with hepatobiliary scintigraphy considered when ultrasound findings are inconclusive.
Laboratory and imaging findings
Laboratory testing typically demonstrates leukocytosis with a left shift, unless the patient is immunocompromised or in advanced sepsis. Liver function tests show a cholestatic pattern with elevated direct bilirubin and alkaline phosphatase, while transaminase elevations are usually mild. Amylase and lipase are normal or only slightly elevated. Ultrasound helps identify the level of obstruction and gallstone etiology. Hepatobiliary scintigraphy is sensitive early in the disease before ductal dilation develops. CT imaging may assist in excluding alternative diagnoses. MR cholangiopancreatography is highly accurate but generally unnecessary if therapeutic ERCP is planned.
Differential considerations
Conditions that may mimic cholangitis include acute cholecystitis, hepatitis, hepatic abscess, acute pancreatitis, right-sided pyelonephritis, right lower lobe pneumonia or pulmonary embolism, perforated peptic ulcer, appendicitis, and sepsis with nonspecific liver enzyme elevation.
Early management
Initial management focuses on aggressive treatment of sepsis. Prompt intravenous fluid resuscitation is essential to correct dehydration and hemodynamic compromise. Most patients show clinical improvement within the first 24 hours of appropriate antibiotic therapy. Vasopressors may be required for hypotension refractory to fluids.
Emergency department treatment
Broad-spectrum intravenous antibiotics should be initiated early to cover gram-negative coliforms, anaerobes, and Enterococcus. Acceptable regimens include beta-lactam/beta-lactamase inhibitor combinations, carbapenems, or combination therapy with an aminoglycoside. Alternative regimens should be used in patients with penicillin allergy or renal insufficiency. Patients should be kept nil per os, with nasogastric decompression if vomiting or ileus is present. Analgesia and antiemetics may be provided once hemodynamic stability is ensured. Early gastroenterology and surgical consultation is mandatory. If there is no clinical response within 12–24 hours, urgent biliary decompression via ERCP, percutaneous drainage, or surgery is required.
Disposition and follow-up
All patients with acute cholangitis require hospital admission, with intensive care unit placement for those with septic shock or organ failure. There are no criteria for emergency department discharge. Definitive management involves continued intravenous antibiotics and timely biliary drainage when indicated.
Key clinical points
Acute cholangitis is a medical emergency with high risk of sepsis. Early recognition, aggressive fluid resuscitation, prompt administration of broad-spectrum antibiotics, and rapid consultation for biliary drainage are critical to improving outcomes.
- Published on
Emergency and acute medicine – Chest Pain
Overview
Chest pain is one of the most common presenting complaints in the emergency department and frequently represents a potentially life-threatening condition such as acute coronary syndrome, pulmonary embolism, or aortic dissection. Until proven otherwise, chest pain should always be considered dangerous. Although categorization can suggest etiology, presentations are often variable, vague, and misleading.
Anatomic patterns of pain
Thoracic pain arises from structures such as the myocardium, pericardium, ascending aorta, pulmonary artery, mediastinum, or esophagus. It is typically deep, visceral, and poorly localized, ranging from crushing pressure to burning or indigestion-like discomfort.
Epigastric pain may originate from the descending aorta, diaphragm, gallbladder, pancreas, duodenum, or stomach and is often referred to the xiphoid area or back.
Pleuritic pain results from inflammation or trauma of ribs, muscles, pleura, or pericardium and worsens with breathing, coughing, laughing, or sneezing; tenderness to palpation may be present.
Diaphragmatic pleurisy causes sharp epigastric, lower retrosternal, or shoulder pain that intensifies with thoracic movement.
Chest wall pain involves skin and subcutaneous structures and is reproducible with palpation, arm movement, neck extension, or vertical pressure on the head.
Causes
Thoracic causes include acute coronary syndrome, myocarditis, pericarditis, stress-induced cardiomyopathy, stimulant use, thoracic aortic dissection, and esophageal disorders such as reflux, spasm, rupture, or mediastinitis.
Epigastric causes include descending aortic dissection, peptic ulcer disease, pancreatitis, cholecystitis, splenic or hepatic injury, and subdiaphragmatic abscess.
Pleuritic pain may result from pulmonary embolism, pneumothorax, pneumonia, costochondritis, or sickle cell acute chest syndrome.
Chest wall causes include musculoskeletal strain, rib fractures, herpes zoster, thrombophlebitis, xiphisternal arthritis, and breast pathology.
Clinical features
Coronary ischemia commonly presents with pressure-like or squeezing pain radiating to the arm or jaw, associated with dyspnea, diaphoresis, nausea, vomiting, weakness, or fatigue, especially in women and older adults.
Aortic dissection typically causes sudden, severe pain with maximal intensity at onset, often tearing and radiating to the back or flank, accompanied by hypertension, pulse deficits, murmurs, syncope, or neurologic symptoms.
Pulmonary embolism presents with pleuritic pain, dyspnea, anxiety, tachycardia, tachypnea, syncope, or low-grade fever.
Acute pericarditis causes substernal pain worsened by lying flat and relieved by leaning forward, often with fever and a friction rub.
Pneumothorax produces sudden pleuritic pain with dyspnea and unilateral decreased breath sounds.
History and examination
History is the most critical diagnostic tool and should focus on onset, duration, location, quality, radiation, provoking and relieving factors, associated symptoms, and prior cardiac risk factors. Physical examination should include careful cardiac, pulmonary, vascular, abdominal, and skin assessments, looking for murmurs, rubs, breath sound asymmetry, pulse deficits, abdominal tenderness, or zoster lesions.
Investigations
An electrocardiogram should be obtained and interpreted within 10 minutes of arrival, with serial tracings when suspicion for acute coronary syndrome persists. Laboratory testing is individualized based on risk and presentation and may include cardiac biomarkers and D-dimer in selected low-risk patients.
Chest radiography evaluates for pneumothorax, pneumonia, heart failure, mediastinal widening, or esophageal rupture. Computed tomography is useful for pulmonary embolism and aortic dissection. Ultrasound and echocardiography rapidly assess pericardial effusion, valvular disease, right ventricular strain, pneumothorax, and pleural effusion.
Management principles
Prehospital and early emergency care should be guided by risk assessment and may include intravenous access, cardiac monitoring, oxygen, aspirin, nitrates, and analgesia when a cardiac cause is suspected.
Initial stabilization focuses on airway, breathing, circulation, oxygenation, intravenous access, and continuous monitoring. Definitive treatment depends on the suspected underlying cause and should not be delayed in high-risk presentations.
Disposition and follow-up
Admission decisions depend on the likelihood of life-threatening cardiopulmonary disease. Patients deemed low risk after thorough evaluation may be discharged with close outpatient follow-up. Patients should receive clear return precautions for persistent, worsening, or recurrent chest pain, associated dyspnea, diaphoresis, syncope, or radiation of pain.
Clinical cautions
Avoid reliance on a single cardiac biomarker, response to medications, or a single electrocardiogram. Serial ECGs and reassessment are essential in patients with suspected acute coronary syndrome or recurrent symptoms.
Overview
Chest pain is one of the most common presenting complaints in the emergency department and frequently represents a potentially life-threatening condition such as acute coronary syndrome, pulmonary embolism, or aortic dissection. Until proven otherwise, chest pain should always be considered dangerous. Although categorization can suggest etiology, presentations are often variable, vague, and misleading.
Anatomic patterns of pain
Thoracic pain arises from structures such as the myocardium, pericardium, ascending aorta, pulmonary artery, mediastinum, or esophagus. It is typically deep, visceral, and poorly localized, ranging from crushing pressure to burning or indigestion-like discomfort.
Epigastric pain may originate from the descending aorta, diaphragm, gallbladder, pancreas, duodenum, or stomach and is often referred to the xiphoid area or back.
Pleuritic pain results from inflammation or trauma of ribs, muscles, pleura, or pericardium and worsens with breathing, coughing, laughing, or sneezing; tenderness to palpation may be present.
Diaphragmatic pleurisy causes sharp epigastric, lower retrosternal, or shoulder pain that intensifies with thoracic movement.
Chest wall pain involves skin and subcutaneous structures and is reproducible with palpation, arm movement, neck extension, or vertical pressure on the head.
Causes
Thoracic causes include acute coronary syndrome, myocarditis, pericarditis, stress-induced cardiomyopathy, stimulant use, thoracic aortic dissection, and esophageal disorders such as reflux, spasm, rupture, or mediastinitis.
Epigastric causes include descending aortic dissection, peptic ulcer disease, pancreatitis, cholecystitis, splenic or hepatic injury, and subdiaphragmatic abscess.
Pleuritic pain may result from pulmonary embolism, pneumothorax, pneumonia, costochondritis, or sickle cell acute chest syndrome.
Chest wall causes include musculoskeletal strain, rib fractures, herpes zoster, thrombophlebitis, xiphisternal arthritis, and breast pathology.
Clinical features
Coronary ischemia commonly presents with pressure-like or squeezing pain radiating to the arm or jaw, associated with dyspnea, diaphoresis, nausea, vomiting, weakness, or fatigue, especially in women and older adults.
Aortic dissection typically causes sudden, severe pain with maximal intensity at onset, often tearing and radiating to the back or flank, accompanied by hypertension, pulse deficits, murmurs, syncope, or neurologic symptoms.
Pulmonary embolism presents with pleuritic pain, dyspnea, anxiety, tachycardia, tachypnea, syncope, or low-grade fever.
Acute pericarditis causes substernal pain worsened by lying flat and relieved by leaning forward, often with fever and a friction rub.
Pneumothorax produces sudden pleuritic pain with dyspnea and unilateral decreased breath sounds.
History and examination
History is the most critical diagnostic tool and should focus on onset, duration, location, quality, radiation, provoking and relieving factors, associated symptoms, and prior cardiac risk factors. Physical examination should include careful cardiac, pulmonary, vascular, abdominal, and skin assessments, looking for murmurs, rubs, breath sound asymmetry, pulse deficits, abdominal tenderness, or zoster lesions.
Investigations
An electrocardiogram should be obtained and interpreted within 10 minutes of arrival, with serial tracings when suspicion for acute coronary syndrome persists. Laboratory testing is individualized based on risk and presentation and may include cardiac biomarkers and D-dimer in selected low-risk patients.
Chest radiography evaluates for pneumothorax, pneumonia, heart failure, mediastinal widening, or esophageal rupture. Computed tomography is useful for pulmonary embolism and aortic dissection. Ultrasound and echocardiography rapidly assess pericardial effusion, valvular disease, right ventricular strain, pneumothorax, and pleural effusion.
Management principles
Prehospital and early emergency care should be guided by risk assessment and may include intravenous access, cardiac monitoring, oxygen, aspirin, nitrates, and analgesia when a cardiac cause is suspected.
Initial stabilization focuses on airway, breathing, circulation, oxygenation, intravenous access, and continuous monitoring. Definitive treatment depends on the suspected underlying cause and should not be delayed in high-risk presentations.
Disposition and follow-up
Admission decisions depend on the likelihood of life-threatening cardiopulmonary disease. Patients deemed low risk after thorough evaluation may be discharged with close outpatient follow-up. Patients should receive clear return precautions for persistent, worsening, or recurrent chest pain, associated dyspnea, diaphoresis, syncope, or radiation of pain.
Clinical cautions
Avoid reliance on a single cardiac biomarker, response to medications, or a single electrocardiogram. Serial ECGs and reassessment are essential in patients with suspected acute coronary syndrome or recurrent symptoms.
