- Published on
Emergency and Acute Medicine: Spinal Cord Syndromes
Spinal cord syndromes represent patterns of neurologic deficits caused by localized disruption of spinal cord pathways, most commonly due to trauma. These injuries produce characteristic combinations of motor and sensory loss depending on the portion of the cord affected. While high-energy trauma is the most frequent cause, patients with underlying spinal disease such as arthritis, osteoporosis, or metastatic lesions are at increased risk of cord injury even after minor trauma.
Several classic syndromes are recognized. Anterior cord syndrome typically results from flexion or axial loading injuries, or from direct compression by fractures, discs, tumors, or abscesses, and occasionally from compromise of the anterior spinal artery. It presents with bilateral motor paralysis and loss of pain and temperature sensation below the lesion, while dorsal column functions (proprioception and vibration) are preserved. Brown-Séquard syndrome results from hemisection of the cord, most often due to penetrating trauma, and produces ipsilateral motor weakness and loss of proprioception, with contralateral loss of pain and temperature, usually beginning a few levels below the injury. Central cord syndrome, commonly seen in elderly patients with cervical spondylosis, follows hyperextension injuries and leads to greater motor weakness in the upper extremities than the lower, with variable sensory deficits. Dorsal cord syndrome involves loss of proprioception, position sense, and coordination, while complete cord syndrome represents total disruption of the cord, resulting in complete motor and sensory loss below the lesion, often accompanied by neurogenic shock characterized by hypotension, bradycardia, warm skin, and sometimes priapism. Deficits that persist beyond 24 hours are usually permanent.
Patients typically present with an acute loss of motor and/or sensory function following trauma. A detailed neurologic examination is essential to determine the level of injury, using known sensory and motor landmarks such as the clavicles (C4), nipples (T4), umbilicus (T10), and perianal region (S5), as well as key motor functions like elbow flexion (C5), finger movement (C8–T1), and ankle motion (L4–S1). Accurate documentation of these findings is critical for diagnosis, monitoring progression, and guiding management.
Evaluation begins with a thorough neurologic assessment and urgent neurosurgical consultation if any deficit is present. Imaging should include plain radiographs of suspected areas, though CT scanning is often preferred, especially in older patients or when radiographs are inconclusive, as it better visualizes bony injury and canal compromise. MRI is the imaging modality of choice for assessing spinal cord injury, particularly when neurologic deficits are unexplained, progressing, or when surgical intervention is being considered. If MRI is unavailable, CT myelography may be used. Additional studies such as lumbar puncture may be considered when alternative diagnoses like demyelinating or inflammatory conditions are suspected.
The differential diagnosis includes peripheral nerve injuries, dorsal root lesions, Guillain–Barré syndrome, multiple sclerosis, transverse myelitis, epidural abscess, and stroke, all of which may mimic spinal cord pathology and must be carefully distinguished.
Management begins in the prehospital setting with strict spinal immobilization and rapid transport to a trauma center. In the emergency department, immobilization must be maintained at all times, including during airway management with in-line stabilization. Intravenous fluids should be administered, particularly in cases of hypotension, though other causes such as hemorrhage must be excluded. Neurogenic shock should be suspected when hypotension is accompanied by bradycardia, and if unresponsive to fluids, vasopressors (preferably alpha-agonists) may be required.
Early involvement of neurosurgery is critical, as timely decompression or stabilization may improve outcomes. Associated injuries should be treated concurrently, and patients with penetrating trauma require antibiotics and tetanus prophylaxis. The routine use of high-dose corticosteroids is no longer recommended, as evidence has not demonstrated clear benefit and may increase complications.
All patients with suspected spinal cord syndromes require hospital admission, typically to an intensive care unit, for close monitoring and management. No patient with signs of spinal cord injury should be discharged from the emergency department. Early recognition, accurate neurologic assessment, and prompt specialist involvement are key factors influencing prognosis and long-term outcomes.
- Published on
Emergency and Acute Medicine: Spider Bite – Brown Recluse (Loxoscelism)
Brown recluse spider envenomation causes a spectrum of illness ranging from localized skin injury to systemic toxicity, a condition known as loxoscelism. Most patients develop a cutaneous lesion, but in some cases—particularly in children—the venom can produce significant systemic effects such as hemolysis, renal failure, or coagulopathy. The disease results from the toxic effects of enzymes within the venom that trigger inflammation, tissue destruction, and vascular injury.
The brown recluse, also known as the fiddleback spider, is a small tan-to-brown spider with a distinctive violin-shaped marking on its back and three pairs of eyes. It typically inhabits warm, dry environments such as woodpiles, attics, closets, and storage areas. Bites usually occur when the spider is trapped against the skin, making them defensive in nature. The venom contains enzymes that bind to red blood cells causing hemolysis, activate inflammatory pathways through complement, and induce tissue necrosis by lipolysis. It also promotes platelet aggregation and thrombosis, and in severe cases may lead to disseminated intravascular coagulation or shock. The severity of toxicity depends on the amount of venom, the size of the patient, and the location of the bite, with children being more susceptible to severe outcomes.
Clinically, diagnosis relies on a combination of presentation and history, although a confirmed spider bite is often difficult to establish. Most patients present with a single skin lesion, commonly in areas where clothing traps the spider. The bite is often initially painless, but within hours patients may develop burning, itching, or aching at the site. Over time, the lesion evolves into a characteristic pattern with a red outer zone, a pale ischemic ring, and a central area of bluish or purple discoloration indicating necrosis. Blisters may form within 24 to 72 hours, followed by the development of a necrotic eschar over several days. The eschar eventually sloughs, leaving an ulcer that heals slowly over weeks and may result in scarring. The extent of local tissue damage does not reliably predict systemic toxicity.
Systemic manifestations are uncommon but more likely in children and typically develop within one to three days after envenomation. Patients may experience fever, malaise, nausea, vomiting, muscle pain, and jaundice due to hemolysis. A generalized rash, dark urine, and signs of hemoglobinuria may also occur. Severe cases can progress to acute kidney injury, disseminated intravascular coagulation, and shock.
Evaluation is primarily clinical, and laboratory testing is not required in mild cases. However, if systemic toxicity is suspected, investigations may reveal hemolytic anemia, thrombocytopenia, leukocytosis, and abnormalities in coagulation consistent with DIC. Renal function tests may indicate impairment, and urinalysis may show hemoglobinuria or proteinuria. Imaging is generally reserved for complications.
It is important to consider alternative diagnoses, as brown recluse bites are frequently overdiagnosed. Conditions such as bacterial skin infections (including MRSA), necrotizing fasciitis, diabetic ulcers, vasculitis, fungal infections, and other dermatologic or vascular disorders can mimic the presentation. In the absence of a clear history of a spider bite, these alternatives should be strongly considered.
Management is largely supportive. Prehospital care includes immobilizing and elevating the affected limb and applying cool compresses. Harmful measures such as incision, suction, or tourniquets should be avoided. In the emergency setting, treatment involves wound cleansing, tetanus prophylaxis, and adequate analgesia. Antibiotics are indicated only if there is evidence of secondary infection. Early surgical excision is contraindicated, as it may worsen tissue injury.
In cases with systemic involvement, management includes intravenous fluids, monitoring of renal and hematologic parameters, and supportive care such as blood transfusions for severe hemolysis or coagulopathy. Dialysis may be required for renal failure, and vasopressors may be needed in cases of shock. The use of dapsone is controversial and should only be considered in severe cases after screening for G6PD deficiency due to the risk of hemolysis and methemoglobinemia. There is no widely available antivenom.
Patients with significant local progression, systemic toxicity, or high-risk features—especially children—should be admitted for monitoring and treatment. Those with mild, stable lesions may be discharged with close follow-up and reassessment over the next several days. Patients should be counseled about the prolonged healing process and the possibility of scarring, with surgical intervention typically delayed until the acute phase has resolved.
Brown recluse bites are relatively uncommon, and overdiagnosis is a frequent pitfall. Many suspected cases are actually due to infections or other causes of necrotic skin lesions. Careful clinical evaluation, avoidance of unnecessary interventions, and appropriate monitoring are essential to achieving good outcomes.
- Published on
Emergency and Acute Medicine – Black Widow Spider Bite
Black widow spider envenomation is a neurotoxic syndrome caused primarily by the female spider, whose venom contains α-latrotoxin. This toxin triggers massive neurotransmitter release at nerve terminals, leading to widespread neurologic, muscular, and autonomic effects. Although rarely fatal, severity depends on factors such as patient age, comorbidities (especially cardiovascular disease), number of bites, and location of envenomation. Children and elderly patients are at higher risk for severe complications.
Black widow spiders are glossy black with a characteristic red hourglass marking on the underside of the abdomen. They are commonly found in dark, sheltered environments such as garages, woodpiles, and barns, and bites often occur during warmer months.
The bite itself may feel like a mild pinprick or go unnoticed. Within minutes, local pain develops, often described as sharp or burning, and may spread proximally. Systemic symptoms typically begin within 15–60 minutes and include severe muscle cramps and spasms, which may involve the abdomen, chest, or limbs depending on the bite location. Patients may also experience headache, dizziness, diaphoresis, nausea, vomiting, chest pain, shortness of breath, and anxiety or a sense of impending doom. In severe cases, complications include hypertension, cardiac dysrhythmias, pulmonary edema, respiratory failure, seizures, and priapism.
On examination, vital signs may show hypertension, tachycardia, or fever. A classic local finding is a “target lesion” with two puncture marks, surrounding erythema, and localized sweating. Neuromuscular findings include muscle rigidity, fasciculations, and tetanic contractions. Abdominal rigidity may mimic an acute surgical abdomen, making diagnosis challenging.
Diagnosis is primarily clinical, based on symptoms and history, as laboratory tests are nonspecific. Labs may show mild leukocytosis or elevated creatine kinase due to muscle injury. ECG monitoring is recommended in patients with cardiac symptoms or risk factors. Imaging may be needed to exclude other causes of abdominal or chest pain.
Management begins with supportive care. The wound should be cleaned, and tetanus prophylaxis administered. Pain control is essential, typically with opioids, and muscle spasms are treated with benzodiazepines. Antiemetics and antihistamines may be used for associated symptoms. Severe hypertension may require antihypertensive therapy.
Antivenin is reserved for moderate to severe cases that do not respond to supportive treatment or for high-risk patients, including pregnant individuals. Indications include severe pain, hypertension, respiratory distress, seizures, or persistent symptoms. The antivenin is effective and usually produces rapid improvement but carries a risk of hypersensitivity reactions, particularly because it is derived from horse serum. Patients must be monitored closely for anaphylaxis, and pretreatment with antihistamines or epinephrine may be considered.
Admission is recommended for patients with significant symptoms, high-risk groups (children, elderly, pregnant), or those requiring antivenin. Asymptomatic patients may be observed for several hours and discharged if no symptoms develop. Most symptoms peak within a few hours and resolve within 2–3 days, though some patients may experience prolonged fatigue, weakness, or neurologic symptoms.
Key points include recognizing the characteristic muscle cramps and autonomic symptoms, distinguishing the condition from surgical emergencies, providing aggressive symptomatic treatment, and using antivenin appropriately in severe cases.
Black widow spider envenomation is a neurotoxic syndrome caused primarily by the female spider, whose venom contains α-latrotoxin. This toxin triggers massive neurotransmitter release at nerve terminals, leading to widespread neurologic, muscular, and autonomic effects. Although rarely fatal, severity depends on factors such as patient age, comorbidities (especially cardiovascular disease), number of bites, and location of envenomation. Children and elderly patients are at higher risk for severe complications.
Black widow spiders are glossy black with a characteristic red hourglass marking on the underside of the abdomen. They are commonly found in dark, sheltered environments such as garages, woodpiles, and barns, and bites often occur during warmer months.
The bite itself may feel like a mild pinprick or go unnoticed. Within minutes, local pain develops, often described as sharp or burning, and may spread proximally. Systemic symptoms typically begin within 15–60 minutes and include severe muscle cramps and spasms, which may involve the abdomen, chest, or limbs depending on the bite location. Patients may also experience headache, dizziness, diaphoresis, nausea, vomiting, chest pain, shortness of breath, and anxiety or a sense of impending doom. In severe cases, complications include hypertension, cardiac dysrhythmias, pulmonary edema, respiratory failure, seizures, and priapism.
On examination, vital signs may show hypertension, tachycardia, or fever. A classic local finding is a “target lesion” with two puncture marks, surrounding erythema, and localized sweating. Neuromuscular findings include muscle rigidity, fasciculations, and tetanic contractions. Abdominal rigidity may mimic an acute surgical abdomen, making diagnosis challenging.
Diagnosis is primarily clinical, based on symptoms and history, as laboratory tests are nonspecific. Labs may show mild leukocytosis or elevated creatine kinase due to muscle injury. ECG monitoring is recommended in patients with cardiac symptoms or risk factors. Imaging may be needed to exclude other causes of abdominal or chest pain.
Management begins with supportive care. The wound should be cleaned, and tetanus prophylaxis administered. Pain control is essential, typically with opioids, and muscle spasms are treated with benzodiazepines. Antiemetics and antihistamines may be used for associated symptoms. Severe hypertension may require antihypertensive therapy.
Antivenin is reserved for moderate to severe cases that do not respond to supportive treatment or for high-risk patients, including pregnant individuals. Indications include severe pain, hypertension, respiratory distress, seizures, or persistent symptoms. The antivenin is effective and usually produces rapid improvement but carries a risk of hypersensitivity reactions, particularly because it is derived from horse serum. Patients must be monitored closely for anaphylaxis, and pretreatment with antihistamines or epinephrine may be considered.
Admission is recommended for patients with significant symptoms, high-risk groups (children, elderly, pregnant), or those requiring antivenin. Asymptomatic patients may be observed for several hours and discharged if no symptoms develop. Most symptoms peak within a few hours and resolve within 2–3 days, though some patients may experience prolonged fatigue, weakness, or neurologic symptoms.
Key points include recognizing the characteristic muscle cramps and autonomic symptoms, distinguishing the condition from surgical emergencies, providing aggressive symptomatic treatment, and using antivenin appropriately in severe cases.
- Published on
Emergency and Acute Medicine – Snake Envenomation
Snake envenomation is a medical emergency caused by the injection of venom, most commonly from pit vipers, which contain proteolytic enzymes and thrombin-like substances. These toxins cause local tissue destruction and systemic coagulopathy known as venom-induced consumption coagulopathy (VICC). While extremity bites are most common, bites to the head, neck, or trunk are more severe. Notably, up to 25% of pit viper bites are “dry bites” and do not result in envenomation.
In the United States, pit vipers (rattlesnakes, copperheads, and cottonmouths) account for the vast majority of envenomations. Coral snakes, though less common, produce primarily neurotoxic venom. International and exotic snakes may also be encountered, particularly in zoos or private collections. Children are at higher risk for severe toxicity due to smaller body mass.
Local symptoms of pit viper bites typically include one or two puncture wounds, immediate pain, swelling, and progressive edema. Over time, ecchymosis, petechiae, and hemorrhagic blisters may develop. Regional lymphadenopathy is common. Systemic symptoms may include weakness, nausea, diaphoresis, metallic taste, and neurologic findings such as paresthesias or fasciculations. Severe envenomation can lead to coagulopathy, hypotension, pulmonary edema, kidney injury, and cardiac dysfunction. Coral snake envenomation may initially show minimal local findings but can cause delayed neurologic symptoms such as weakness, diplopia, and respiratory failure.
Evaluation requires careful and repeated physical examination, including marking the margins of swelling to monitor progression. Laboratory studies include CBC, coagulation profile, fibrinogen, electrolytes, renal function, creatine phosphokinase, and urinalysis. These help assess severity and complications such as coagulopathy or rhabdomyolysis.
Prehospital care focuses on safety and supportive measures. The patient should move away from the snake, minimize activity, and keep the affected limb immobilized at heart level. Constrictive items should be removed. Harmful interventions such as incision, suction, tourniquets, cryotherapy, or electrical treatment should be avoided, as they worsen outcomes.
Initial management in the emergency setting follows airway, breathing, and circulation principles, along with fluid resuscitation to maintain renal perfusion. Pain is managed with IV opioids. Tetanus prophylaxis should be updated, but routine antibiotics and steroids are not indicated unless treating antivenom reactions.
Antivenom is the cornerstone of treatment for significant envenomation. Indications include progressive swelling, systemic toxicity, coagulopathy, or unstable vital signs. CroFab is the primary treatment for North American pit viper envenomation. Initial dosing is typically 4–6 vials IV, with higher doses for severe cases. Response is assessed after infusion, and additional or maintenance dosing may be required. Pediatric patients receive the same dosing as adults.
Patients must be monitored closely for allergic reactions to antivenom. If reactions occur, treatment includes antihistamines, corticosteroids, fluids, and epinephrine if severe. Decisions about restarting antivenom should involve a toxicologist or poison control center.
Patients with moderate to severe envenomation or those receiving antivenom require admission, often to the ICU. Even asymptomatic patients with potentially venomous bites should be observed for several hours. Discharge is appropriate only if there are no signs of envenomation after observation and laboratory evaluation remains normal.
Key points include avoiding harmful first-aid measures, recognizing that symptoms may initially be mild, administering antivenom promptly when indicated, and ensuring close monitoring for progression or complications.
Snake envenomation is a medical emergency caused by the injection of venom, most commonly from pit vipers, which contain proteolytic enzymes and thrombin-like substances. These toxins cause local tissue destruction and systemic coagulopathy known as venom-induced consumption coagulopathy (VICC). While extremity bites are most common, bites to the head, neck, or trunk are more severe. Notably, up to 25% of pit viper bites are “dry bites” and do not result in envenomation.
In the United States, pit vipers (rattlesnakes, copperheads, and cottonmouths) account for the vast majority of envenomations. Coral snakes, though less common, produce primarily neurotoxic venom. International and exotic snakes may also be encountered, particularly in zoos or private collections. Children are at higher risk for severe toxicity due to smaller body mass.
Local symptoms of pit viper bites typically include one or two puncture wounds, immediate pain, swelling, and progressive edema. Over time, ecchymosis, petechiae, and hemorrhagic blisters may develop. Regional lymphadenopathy is common. Systemic symptoms may include weakness, nausea, diaphoresis, metallic taste, and neurologic findings such as paresthesias or fasciculations. Severe envenomation can lead to coagulopathy, hypotension, pulmonary edema, kidney injury, and cardiac dysfunction. Coral snake envenomation may initially show minimal local findings but can cause delayed neurologic symptoms such as weakness, diplopia, and respiratory failure.
Evaluation requires careful and repeated physical examination, including marking the margins of swelling to monitor progression. Laboratory studies include CBC, coagulation profile, fibrinogen, electrolytes, renal function, creatine phosphokinase, and urinalysis. These help assess severity and complications such as coagulopathy or rhabdomyolysis.
Prehospital care focuses on safety and supportive measures. The patient should move away from the snake, minimize activity, and keep the affected limb immobilized at heart level. Constrictive items should be removed. Harmful interventions such as incision, suction, tourniquets, cryotherapy, or electrical treatment should be avoided, as they worsen outcomes.
Initial management in the emergency setting follows airway, breathing, and circulation principles, along with fluid resuscitation to maintain renal perfusion. Pain is managed with IV opioids. Tetanus prophylaxis should be updated, but routine antibiotics and steroids are not indicated unless treating antivenom reactions.
Antivenom is the cornerstone of treatment for significant envenomation. Indications include progressive swelling, systemic toxicity, coagulopathy, or unstable vital signs. CroFab is the primary treatment for North American pit viper envenomation. Initial dosing is typically 4–6 vials IV, with higher doses for severe cases. Response is assessed after infusion, and additional or maintenance dosing may be required. Pediatric patients receive the same dosing as adults.
Patients must be monitored closely for allergic reactions to antivenom. If reactions occur, treatment includes antihistamines, corticosteroids, fluids, and epinephrine if severe. Decisions about restarting antivenom should involve a toxicologist or poison control center.
Patients with moderate to severe envenomation or those receiving antivenom require admission, often to the ICU. Even asymptomatic patients with potentially venomous bites should be observed for several hours. Discharge is appropriate only if there are no signs of envenomation after observation and laboratory evaluation remains normal.
Key points include avoiding harmful first-aid measures, recognizing that symptoms may initially be mild, administering antivenom promptly when indicated, and ensuring close monitoring for progression or complications.
- Published on
Emergency and Acute Medicine – Smoke Inhalation
Smoke inhalation should be suspected in any patient exposed to fire in an enclosed space or with a history of loss of consciousness. It can cause injury through three main mechanisms: direct thermal injury to the upper airway, chemical irritation of the lower airway, and systemic toxicity from inhaled substances such as carbon monoxide and hydrogen cyanide. Notably, steam inhalation is especially dangerous due to its extremely high heat-carrying capacity, which can rapidly cause severe airway edema and obstruction.
Thermal injury is typically limited to supraglottic structures because the upper airway dissipates heat effectively. However, inhaled irritants can damage lower airway structures, leading to bronchospasm, inflammation, and impaired gas exchange. Systemic toxicity occurs when gases like carbon monoxide impair oxygen delivery or cyanide disrupts cellular respiration.
Patients often present with a history of smoke exposure, especially in confined spaces. Early symptoms may be mild or even absent, with deterioration occurring over the next 24 hours. Upper airway findings include hoarseness, stridor, cough, and nasopharyngeal irritation. Lower airway involvement may present with chest discomfort, hemoptysis, bronchospasm, and excessive secretions. Classic warning signs of significant inhalation injury include facial burns, singed nasal hairs, and carbonaceous sputum.
Evaluation includes pulse oximetry, though it may be falsely normal in carbon monoxide poisoning. Arterial blood gas analysis may reveal hypoxia or metabolic acidosis, particularly in cases of carbon monoxide or cyanide toxicity. Chest radiographs are often initially normal but may show pulmonary changes later. Laboratory testing should include carboxyhemoglobin levels for suspected carbon monoxide exposure and lactate as a marker for cyanide toxicity. Cyanide levels can be measured but treatment should not be delayed while awaiting results.
Management begins with immediate administration of 100% oxygen via face mask. Early intubation is critical in patients with signs of airway compromise such as stridor, drooling, respiratory distress, or altered mental status. Bronchospasm can be treated with nebulized bronchodilators such as albuterol, and corticosteroids may be considered in patients with underlying asthma or COPD.
For carbon monoxide toxicity, treatment includes high-flow oxygen and, in selected cases, hyperbaric oxygen therapy. Cyanide toxicity should be treated promptly with hydroxocobalamin (preferred), or with sodium thiosulfate if necessary. Care must be taken with nitrite-based antidotes in patients with concurrent carbon monoxide exposure.
Patients requiring intubation, those with significant burns, persistent respiratory symptoms, or evidence of toxic exposure should be admitted. Patients with minimal exposure who remain asymptomatic after a period of observation (typically 4–6 hours) may be discharged with clear return precautions.
Key points include maintaining a high index of suspicion even with initially normal findings, recognizing that pulse oximetry can be misleading, initiating early oxygen therapy, and not delaying treatment for suspected cyanide toxicity.
Smoke inhalation should be suspected in any patient exposed to fire in an enclosed space or with a history of loss of consciousness. It can cause injury through three main mechanisms: direct thermal injury to the upper airway, chemical irritation of the lower airway, and systemic toxicity from inhaled substances such as carbon monoxide and hydrogen cyanide. Notably, steam inhalation is especially dangerous due to its extremely high heat-carrying capacity, which can rapidly cause severe airway edema and obstruction.
Thermal injury is typically limited to supraglottic structures because the upper airway dissipates heat effectively. However, inhaled irritants can damage lower airway structures, leading to bronchospasm, inflammation, and impaired gas exchange. Systemic toxicity occurs when gases like carbon monoxide impair oxygen delivery or cyanide disrupts cellular respiration.
Patients often present with a history of smoke exposure, especially in confined spaces. Early symptoms may be mild or even absent, with deterioration occurring over the next 24 hours. Upper airway findings include hoarseness, stridor, cough, and nasopharyngeal irritation. Lower airway involvement may present with chest discomfort, hemoptysis, bronchospasm, and excessive secretions. Classic warning signs of significant inhalation injury include facial burns, singed nasal hairs, and carbonaceous sputum.
Evaluation includes pulse oximetry, though it may be falsely normal in carbon monoxide poisoning. Arterial blood gas analysis may reveal hypoxia or metabolic acidosis, particularly in cases of carbon monoxide or cyanide toxicity. Chest radiographs are often initially normal but may show pulmonary changes later. Laboratory testing should include carboxyhemoglobin levels for suspected carbon monoxide exposure and lactate as a marker for cyanide toxicity. Cyanide levels can be measured but treatment should not be delayed while awaiting results.
Management begins with immediate administration of 100% oxygen via face mask. Early intubation is critical in patients with signs of airway compromise such as stridor, drooling, respiratory distress, or altered mental status. Bronchospasm can be treated with nebulized bronchodilators such as albuterol, and corticosteroids may be considered in patients with underlying asthma or COPD.
For carbon monoxide toxicity, treatment includes high-flow oxygen and, in selected cases, hyperbaric oxygen therapy. Cyanide toxicity should be treated promptly with hydroxocobalamin (preferred), or with sodium thiosulfate if necessary. Care must be taken with nitrite-based antidotes in patients with concurrent carbon monoxide exposure.
Patients requiring intubation, those with significant burns, persistent respiratory symptoms, or evidence of toxic exposure should be admitted. Patients with minimal exposure who remain asymptomatic after a period of observation (typically 4–6 hours) may be discharged with clear return precautions.
Key points include maintaining a high index of suspicion even with initially normal findings, recognizing that pulse oximetry can be misleading, initiating early oxygen therapy, and not delaying treatment for suspected cyanide toxicity.
- Published on
Emergency and Acute Medicine: Sternoclavicular Joint Injury
The sternoclavicular joint (SCJ) is the only articulation connecting the upper limb to the axial skeleton, making it a critical but relatively uncommon site of injury. Stability of this joint depends largely on surrounding ligaments, including the anterior and posterior sternoclavicular ligaments, interclavicular ligament, and costoclavicular ligament. Injuries to the SCJ are rare and typically result from high-energy trauma such as motor vehicle collisions or athletic impacts. They may present as sprains, subluxations, or complete dislocations.
SCJ injuries occur when ligamentous structures are stressed or disrupted. In sprains, the joint capsule remains intact, while subluxation involves partial ligament rupture with preserved costoclavicular support. Complete ligament disruption leads to dislocation, which may be anterior or posterior depending on the direction of force and shoulder position at the time of injury. Anterior dislocations are far more common, accounting for over 90% of cases, and typically result from a posteriorly directed force to the shoulder. Posterior dislocations are less common but far more dangerous, often resulting from direct trauma to the medial clavicle or force transmitted through the shoulder. These can compress vital mediastinal structures, including the trachea, esophagus, and major vessels, making them surgical emergencies.
Patients usually present with localized pain and swelling over the medial clavicle, often holding the affected arm across the chest. Movement of the shoulder is limited, particularly abduction and external rotation. In anterior dislocations, the medial clavicle is visibly prominent and palpable. Posterior dislocations may be more difficult to detect due to swelling but may present with concerning symptoms such as difficulty breathing or swallowing, hoarseness, or signs of vascular compromise. A thorough neurovascular and airway assessment is essential in all suspected cases.
Diagnosis can be challenging with plain radiographs, as the SCJ is poorly visualized. Chest x-rays may appear normal, so a high index of suspicion is required. CT scanning is the imaging modality of choice, as it clearly defines the position of the clavicle and can identify associated injuries to surrounding structures. Ultrasound may be useful in the emergency setting, particularly in unstable patients, while MRI can provide additional detail regarding soft tissue and ligamentous injuries.
Management depends on the severity and type of injury. Sprains and subluxations are typically treated conservatively with rest, analgesia, and sling immobilization. Anterior dislocations may be reduced in the emergency department using traction and positioning techniques under procedural sedation, though recurrence is common and residual deformity is usually cosmetic. Posterior dislocations, however, require urgent reduction—preferably in the operating room with orthopedic and thoracic surgical support due to the risk of life-threatening complications. In emergencies where airway or vascular compromise is present and surgical support is unavailable, reduction may need to be attempted in the ED.
Patients with posterior dislocations or associated complications require hospital admission for monitoring and further management. Those with uncomplicated anterior dislocations or minor injuries may be discharged with appropriate immobilization and close orthopedic follow-up. Activity restriction is important during recovery, and high-risk activities should be avoided for several months.
A key pitfall is missing posterior dislocations, which may be mistaken for anterior injuries due to swelling. In children, injuries to the growth plate can mimic SCJ dislocations. Because of the potential for severe complications, especially with posterior dislocations, early recognition and specialist involvement are critical for optimal outcomes.
The sternoclavicular joint (SCJ) is the only articulation connecting the upper limb to the axial skeleton, making it a critical but relatively uncommon site of injury. Stability of this joint depends largely on surrounding ligaments, including the anterior and posterior sternoclavicular ligaments, interclavicular ligament, and costoclavicular ligament. Injuries to the SCJ are rare and typically result from high-energy trauma such as motor vehicle collisions or athletic impacts. They may present as sprains, subluxations, or complete dislocations.
SCJ injuries occur when ligamentous structures are stressed or disrupted. In sprains, the joint capsule remains intact, while subluxation involves partial ligament rupture with preserved costoclavicular support. Complete ligament disruption leads to dislocation, which may be anterior or posterior depending on the direction of force and shoulder position at the time of injury. Anterior dislocations are far more common, accounting for over 90% of cases, and typically result from a posteriorly directed force to the shoulder. Posterior dislocations are less common but far more dangerous, often resulting from direct trauma to the medial clavicle or force transmitted through the shoulder. These can compress vital mediastinal structures, including the trachea, esophagus, and major vessels, making them surgical emergencies.
Patients usually present with localized pain and swelling over the medial clavicle, often holding the affected arm across the chest. Movement of the shoulder is limited, particularly abduction and external rotation. In anterior dislocations, the medial clavicle is visibly prominent and palpable. Posterior dislocations may be more difficult to detect due to swelling but may present with concerning symptoms such as difficulty breathing or swallowing, hoarseness, or signs of vascular compromise. A thorough neurovascular and airway assessment is essential in all suspected cases.
Diagnosis can be challenging with plain radiographs, as the SCJ is poorly visualized. Chest x-rays may appear normal, so a high index of suspicion is required. CT scanning is the imaging modality of choice, as it clearly defines the position of the clavicle and can identify associated injuries to surrounding structures. Ultrasound may be useful in the emergency setting, particularly in unstable patients, while MRI can provide additional detail regarding soft tissue and ligamentous injuries.
Management depends on the severity and type of injury. Sprains and subluxations are typically treated conservatively with rest, analgesia, and sling immobilization. Anterior dislocations may be reduced in the emergency department using traction and positioning techniques under procedural sedation, though recurrence is common and residual deformity is usually cosmetic. Posterior dislocations, however, require urgent reduction—preferably in the operating room with orthopedic and thoracic surgical support due to the risk of life-threatening complications. In emergencies where airway or vascular compromise is present and surgical support is unavailable, reduction may need to be attempted in the ED.
Patients with posterior dislocations or associated complications require hospital admission for monitoring and further management. Those with uncomplicated anterior dislocations or minor injuries may be discharged with appropriate immobilization and close orthopedic follow-up. Activity restriction is important during recovery, and high-risk activities should be avoided for several months.
A key pitfall is missing posterior dislocations, which may be mistaken for anterior injuries due to swelling. In children, injuries to the growth plate can mimic SCJ dislocations. Because of the potential for severe complications, especially with posterior dislocations, early recognition and specialist involvement are critical for optimal outcomes.
- Published on
🚑 Emergency and Acute Medicine: Staphylococcal Scalded Skin Syndrome
Staphylococcal scalded skin syndrome (SSSS) is a toxin-mediated dermatologic condition caused by exfoliative toxins produced by Staphylococcus aureus. These toxins are generated at a distant site of infection or colonization and spread through the bloodstream, leading to cleavage within the superficial epidermis. Specifically, they disrupt desmosomes in the granular layer, resulting in widespread skin separation and exfoliation. The condition most commonly affects infants and young children under 6 years of age due to their immature immune systems and reduced ability to clear toxins. It may also occur in immunocompromised adults or those with significant renal dysfunction.
SSSS often arises from seemingly minor or occult sources of infection such as the nasopharynx, conjunctiva, umbilicus, urinary tract, or small skin breaks. In many cases, no obvious primary focus is identified. The disease spectrum includes localized forms such as bullous impetigo and more severe generalized forms, including Ritter disease in neonates. The clinical severity depends on patient age and extent of toxin dissemination.
The illness typically begins abruptly with nonspecific symptoms such as fever, irritability, and malaise. This is followed by the rapid development of a diffuse, erythematous rash resembling sunburn, often described as having a “sandpaper-like” texture. The skin is extremely tender, especially in flexural and intertriginous areas such as the neck, axillae, groin, and around the eyes and mouth. Within 1 to 3 days, flaccid bullae form and rupture easily, leading to widespread peeling of the epidermis. A hallmark feature is the Nikolsky sign, where gentle pressure causes the superficial skin layers to separate. Despite the dramatic skin findings, mucous membranes are typically spared, which helps distinguish SSSS from more severe conditions like toxic epidermal necrolysis.
Diagnosis is primarily clinical. Laboratory tests may be used to assess systemic involvement or identify the source of infection, but fluid from the bullae is usually sterile due to the toxin-mediated nature of the disease. Cultures from other sites, such as the nasopharynx or conjunctiva, may reveal the causative organism. In atypical cases, a skin biopsy can confirm the level of epidermal separation.
Management is similar to treating a superficial burn. Patients require careful fluid and electrolyte management, pain control, and protection of the skin barrier. Gentle handling, sterile dressings, and temperature regulation are essential. Prompt initiation of antibiotics targeting penicillin-resistant S. aureus is critical. Intravenous agents such as cefazolin or nafcillin are commonly used, with vancomycin reserved for suspected MRSA. Mild cases in older children may be treated with oral antibiotics such as cephalexin or dicloxacillin.
Hospital admission is required for infants, toxic-appearing patients, or those with extensive skin involvement or dehydration. Complications, though uncommon, include fluid loss, electrolyte imbalance, secondary infections, and sepsis. With appropriate treatment, recovery is typically rapid and complete within two weeks, without scarring.
Important clinical pitfalls include confusing SSSS with other dermatologic emergencies such as toxic epidermal necrolysis or scarlet fever, and failing to identify the underlying source of infection. Early recognition and treatment are essential to prevent complications and ensure favorable outcomes.
- Published on
Emergency and Acute Medicine: Spontaneous Bacterial Peritonitis
Spontaneous bacterial peritonitis (SBP) is an infection of ascitic fluid that occurs without an identifiable surgically treatable intra-abdominal source. It is diagnosed when the ascitic fluid polymorphonuclear leukocyte (PMN) count exceeds 250 cells/mm³, typically with a positive culture. Distinguishing SBP from secondary bacterial peritonitis is critical, as mismanagement carries severe consequences—secondary peritonitis requires surgery, while surgical intervention in SBP is associated with high mortality. SBP is common in patients with ascites, particularly those with liver cirrhosis, with an annual incidence of up to 30%.
The condition arises primarily due to bacterial translocation from the gut. Portal hypertension leads to bowel wall edema, allowing intestinal bacteria to migrate into the peritoneal cavity. Additional contributing factors include transient bacteremia, impaired immune defenses, and reduced complement activity. Gastrointestinal bleeding further increases risk by compromising mucosal barriers. Although SBP is most commonly associated with cirrhosis, it can rarely occur in other causes of ascites such as nephrotic syndrome or heart failure. The most frequent pathogens are aerobic gram-negative organisms such as Escherichia coli and Klebsiella, followed by gram-positive organisms like streptococci.
Clinical presentation is often subtle, and up to one-third of patients may be asymptomatic. When symptoms occur, they may include mild diffuse abdominal pain, fever, chills, diarrhea, worsening ascites, or altered mental status. On examination, fever is the most common finding, though cirrhotic patients may have only low-grade elevations in temperature. Abdominal tenderness may be present, but classic peritonitis signs like rigidity are often absent due to the presence of ascitic fluid separating peritoneal layers.
Paracentesis is the cornerstone of diagnosis and should be performed in all patients with ascites and suspected infection. The procedure is safe even in the presence of coagulopathy, except in severe thrombocytopenia. Ascitic fluid analysis includes cell count, culture, and biochemical markers. A PMN count above 250 cells/mm³ confirms the diagnosis, even if cultures are negative. Additional findings may include low protein levels, low glucose, elevated lactate dehydrogenase, and acidic pH. Blood tests are supportive and reflect underlying liver disease rather than the infection itself. Imaging is primarily used to exclude secondary causes such as perforation or abscess.
Management begins with prompt empiric antibiotic therapy after diagnostic paracentesis. Third-generation cephalosporins such as cefotaxime or ceftriaxone are first-line treatments. Alternative regimens include broad-spectrum β-lactam combinations, depending on patient factors. Aminoglycosides and fluoroquinolones are generally avoided due to toxicity and resistance concerns. Intravenous albumin is recommended in high-risk patients to reduce the risk of renal failure and improve survival. Early treatment is essential, as SBP carries significant mortality and may precipitate complications such as hepatorenal syndrome.
All patients with SBP require hospital admission for intravenous antibiotics and monitoring. Intensive care may be necessary for those with septic shock or severe hepatic encephalopathy. Discharge is not appropriate unless SBP has been definitively excluded or the patient refuses admission under carefully selected low-risk conditions. Long-term management often includes prophylactic antibiotics to prevent recurrence, particularly in high-risk individuals.
Key clinical pitfalls include failing to perform early paracentesis, overlooking SBP in patients with minimal symptoms, and not excluding secondary peritonitis. Because presentation can be subtle, a high index of suspicion is essential in any patient with ascites who develops clinical deterioration. Early diagnosis and timely treatment significantly improve outcomes.
Spontaneous bacterial peritonitis (SBP) is an infection of ascitic fluid that occurs without an identifiable surgically treatable intra-abdominal source. It is diagnosed when the ascitic fluid polymorphonuclear leukocyte (PMN) count exceeds 250 cells/mm³, typically with a positive culture. Distinguishing SBP from secondary bacterial peritonitis is critical, as mismanagement carries severe consequences—secondary peritonitis requires surgery, while surgical intervention in SBP is associated with high mortality. SBP is common in patients with ascites, particularly those with liver cirrhosis, with an annual incidence of up to 30%.
The condition arises primarily due to bacterial translocation from the gut. Portal hypertension leads to bowel wall edema, allowing intestinal bacteria to migrate into the peritoneal cavity. Additional contributing factors include transient bacteremia, impaired immune defenses, and reduced complement activity. Gastrointestinal bleeding further increases risk by compromising mucosal barriers. Although SBP is most commonly associated with cirrhosis, it can rarely occur in other causes of ascites such as nephrotic syndrome or heart failure. The most frequent pathogens are aerobic gram-negative organisms such as Escherichia coli and Klebsiella, followed by gram-positive organisms like streptococci.
Clinical presentation is often subtle, and up to one-third of patients may be asymptomatic. When symptoms occur, they may include mild diffuse abdominal pain, fever, chills, diarrhea, worsening ascites, or altered mental status. On examination, fever is the most common finding, though cirrhotic patients may have only low-grade elevations in temperature. Abdominal tenderness may be present, but classic peritonitis signs like rigidity are often absent due to the presence of ascitic fluid separating peritoneal layers.
Paracentesis is the cornerstone of diagnosis and should be performed in all patients with ascites and suspected infection. The procedure is safe even in the presence of coagulopathy, except in severe thrombocytopenia. Ascitic fluid analysis includes cell count, culture, and biochemical markers. A PMN count above 250 cells/mm³ confirms the diagnosis, even if cultures are negative. Additional findings may include low protein levels, low glucose, elevated lactate dehydrogenase, and acidic pH. Blood tests are supportive and reflect underlying liver disease rather than the infection itself. Imaging is primarily used to exclude secondary causes such as perforation or abscess.
Management begins with prompt empiric antibiotic therapy after diagnostic paracentesis. Third-generation cephalosporins such as cefotaxime or ceftriaxone are first-line treatments. Alternative regimens include broad-spectrum β-lactam combinations, depending on patient factors. Aminoglycosides and fluoroquinolones are generally avoided due to toxicity and resistance concerns. Intravenous albumin is recommended in high-risk patients to reduce the risk of renal failure and improve survival. Early treatment is essential, as SBP carries significant mortality and may precipitate complications such as hepatorenal syndrome.
All patients with SBP require hospital admission for intravenous antibiotics and monitoring. Intensive care may be necessary for those with septic shock or severe hepatic encephalopathy. Discharge is not appropriate unless SBP has been definitively excluded or the patient refuses admission under carefully selected low-risk conditions. Long-term management often includes prophylactic antibiotics to prevent recurrence, particularly in high-risk individuals.
Key clinical pitfalls include failing to perform early paracentesis, overlooking SBP in patients with minimal symptoms, and not excluding secondary peritonitis. Because presentation can be subtle, a high index of suspicion is essential in any patient with ascites who develops clinical deterioration. Early diagnosis and timely treatment significantly improve outcomes.
- Published on
Emergency and Acute Medicine: Spondylolysis and Spondylolisthesis
Spondylolysis is a structural defect in the pars interarticularis, the portion of bone between the superior and inferior articular facets of a vertebra. This defect may occur on one side or both sides, with bilateral involvement significantly increasing the risk of progression to spondylolisthesis, a condition in which one vertebra slips forward over the one beneath it. Spondylolisthesis affects approximately 5% of the population and is more common in males. About half of patients with spondylolysis will develop some degree of vertebral slippage, and roughly half of those individuals will experience symptoms. This condition often leads to nerve root compression, frequently causing sciatica.
Spondylolisthesis is categorized based on underlying cause and severity. Etiologic types include congenital (dysplastic), stress-related (isthmic), degenerative, traumatic, and pathologic forms. Severity is graded using the Meyerding classification, ranging from Grade I (≤25% slippage) to Grade IV (75–100%). The most commonly affected level is L5 slipping over S1, followed by L4 over L5. In pediatric populations, spondylolysis is a common cause of significant low back pain, particularly during adolescent growth spurts. It is frequently seen in young athletes engaged in sports involving repetitive spinal extension, such as gymnastics, diving, and football.
The exact cause of spondylolysis remains uncertain but is thought to involve a combination of congenital susceptibility, altered bone density, and repetitive microtrauma. Symptoms usually develop gradually, unless triggered by acute injury. Patients commonly report low back pain associated with muscle stiffness or spasms, which may radiate to the proximal legs. Pain is typically worsened by standing, walking, or hyperextension and relieved by sitting or forward bending. Neurologic symptoms are generally absent unless significant vertebral displacement leads to nerve compression.
On physical examination, patients may demonstrate a hyperlordotic posture with a shortened trunk appearance and tight hamstrings. A classic diagnostic maneuver is the one-legged hyperextension test, where standing on one leg and leaning backward reproduces pain on the affected side. In more advanced cases, a palpable step-off may be detected over the lumbar spine. Neurologic examination is usually normal but may reveal dermatomal sensory or motor deficits if nerve involvement is present.
Diagnosis is primarily radiologic. Plain lumbosacral spine radiographs, especially oblique views, may reveal a defect in the pars interarticularis, often described as the “Scottie dog” sign with a “broken neck.” Lateral views help identify vertebral slippage. CT scanning provides more detailed visualization of bony abnormalities and is useful in evaluating fracture acuity and healing, while MRI can assess nerve root compression and other soft tissue pathology. In children, imaging is pursued more readily due to the higher risk of progression.
Management is typically conservative. Treatment focuses on pain control, activity modification, and gradual return to activity once symptoms improve. Patients are advised to avoid activities involving repetitive spinal extension for several weeks. Physical therapy and, in some cases, bracing may be considered. Surgical intervention, usually spinal fusion, is reserved for patients with severe symptoms, high-grade slippage (Grade III or IV), or those who fail conservative therapy.
Medications may include NSAIDs, muscle relaxants, and, when necessary, short-term opioids for pain control. Hospital admission is indicated for patients who are unable to ambulate, cannot manage pain at home, or develop new or worsening neurologic deficits. Most patients can be managed as outpatients with appropriate follow-up and education. Pediatric patients require especially close monitoring due to the higher likelihood of progression.
Important pitfalls include missing the diagnosis in adolescents with persistent back pain, failing to recognize progressive neurologic deficits, and overlooking alternative diagnoses such as infection, tumor, or disc disease. Early identification and appropriate management are key to preventing progression and long-term complications.
Spondylolysis is a structural defect in the pars interarticularis, the portion of bone between the superior and inferior articular facets of a vertebra. This defect may occur on one side or both sides, with bilateral involvement significantly increasing the risk of progression to spondylolisthesis, a condition in which one vertebra slips forward over the one beneath it. Spondylolisthesis affects approximately 5% of the population and is more common in males. About half of patients with spondylolysis will develop some degree of vertebral slippage, and roughly half of those individuals will experience symptoms. This condition often leads to nerve root compression, frequently causing sciatica.
Spondylolisthesis is categorized based on underlying cause and severity. Etiologic types include congenital (dysplastic), stress-related (isthmic), degenerative, traumatic, and pathologic forms. Severity is graded using the Meyerding classification, ranging from Grade I (≤25% slippage) to Grade IV (75–100%). The most commonly affected level is L5 slipping over S1, followed by L4 over L5. In pediatric populations, spondylolysis is a common cause of significant low back pain, particularly during adolescent growth spurts. It is frequently seen in young athletes engaged in sports involving repetitive spinal extension, such as gymnastics, diving, and football.
The exact cause of spondylolysis remains uncertain but is thought to involve a combination of congenital susceptibility, altered bone density, and repetitive microtrauma. Symptoms usually develop gradually, unless triggered by acute injury. Patients commonly report low back pain associated with muscle stiffness or spasms, which may radiate to the proximal legs. Pain is typically worsened by standing, walking, or hyperextension and relieved by sitting or forward bending. Neurologic symptoms are generally absent unless significant vertebral displacement leads to nerve compression.
On physical examination, patients may demonstrate a hyperlordotic posture with a shortened trunk appearance and tight hamstrings. A classic diagnostic maneuver is the one-legged hyperextension test, where standing on one leg and leaning backward reproduces pain on the affected side. In more advanced cases, a palpable step-off may be detected over the lumbar spine. Neurologic examination is usually normal but may reveal dermatomal sensory or motor deficits if nerve involvement is present.
Diagnosis is primarily radiologic. Plain lumbosacral spine radiographs, especially oblique views, may reveal a defect in the pars interarticularis, often described as the “Scottie dog” sign with a “broken neck.” Lateral views help identify vertebral slippage. CT scanning provides more detailed visualization of bony abnormalities and is useful in evaluating fracture acuity and healing, while MRI can assess nerve root compression and other soft tissue pathology. In children, imaging is pursued more readily due to the higher risk of progression.
Management is typically conservative. Treatment focuses on pain control, activity modification, and gradual return to activity once symptoms improve. Patients are advised to avoid activities involving repetitive spinal extension for several weeks. Physical therapy and, in some cases, bracing may be considered. Surgical intervention, usually spinal fusion, is reserved for patients with severe symptoms, high-grade slippage (Grade III or IV), or those who fail conservative therapy.
Medications may include NSAIDs, muscle relaxants, and, when necessary, short-term opioids for pain control. Hospital admission is indicated for patients who are unable to ambulate, cannot manage pain at home, or develop new or worsening neurologic deficits. Most patients can be managed as outpatients with appropriate follow-up and education. Pediatric patients require especially close monitoring due to the higher likelihood of progression.
Important pitfalls include missing the diagnosis in adolescents with persistent back pain, failing to recognize progressive neurologic deficits, and overlooking alternative diagnoses such as infection, tumor, or disc disease. Early identification and appropriate management are key to preventing progression and long-term complications.
- Published on
Emergency and Acute Medicine: Splenic Injury
Splenic injury is one of the most important considerations in abdominal trauma, as the spleen is the most commonly injured intra-abdominal organ. Located in the left upper quadrant between the stomach and diaphragm, the spleen is highly vascular and therefore prone to bleeding when injured. In many cases, it is the only organ affected, particularly in blunt trauma scenarios such as motor vehicle accidents, falls, or direct blows to the abdomen. The severity of injury is classified using grading systems based on the extent of hematoma, laceration, and vascular involvement, ranging from minor capsular tears to complete splenic destruction.
The mechanism of injury plays a crucial role in diagnosis. Blunt trauma often results from compression of the spleen between the abdominal wall and posterior structures, while penetrating trauma causes damage through direct tissue disruption and energy transfer. In children, anatomical differences such as a more compliant rib cage and less protective musculature increase susceptibility to splenic injury, while in older adults, reduced physiologic reserve increases the risk of poor outcomes.
Clinical presentation varies widely. Patients may exhibit signs of internal bleeding, including dizziness, weakness, syncope, or hypotension. Local findings often include left upper quadrant tenderness, abdominal distention, and guarding. Classic signs include Kehr sign (referred pain to the left shoulder due to diaphragmatic irritation) and Balance sign (a palpable LUQ mass). Associated findings such as lower left rib fractures or external bruising over the abdomen or flank may further raise suspicion. However, history and physical examination alone are neither sensitive nor specific, making imaging essential.
Initial evaluation follows standard trauma protocols, including airway, breathing, and circulation management. Laboratory studies such as hemoglobin and type and cross-match are obtained but are not diagnostic. Imaging is critical, with focused assessment with sonography for trauma (FAST) used at the bedside to detect free intraperitoneal fluid. While FAST is useful for identifying bleeding, it does not reliably assess the extent of splenic injury. CT scanning with contrast is the gold standard in hemodynamically stable patients, as it provides detailed information about the injury grade and associated intra-abdominal pathology. In unstable patients, immediate surgical intervention may be required without advanced imaging.
Management depends primarily on hemodynamic stability and injury severity. Patients who are unstable or have signs of ongoing hemorrhage typically require emergent laparotomy, often with splenectomy. In contrast, the majority of stable patients—especially those with lower-grade injuries (Grades I–III)—can be managed nonoperatively with close monitoring, serial examinations, and repeat laboratory testing. Angiographic embolization is an important adjunct in selected stable patients with evidence of ongoing bleeding.
Special considerations apply to different populations. In children, nonoperative management is strongly favored to preserve splenic function and reduce the risk of overwhelming post-splenectomy infection. In older adults, however, operative management may be more frequently required due to decreased physiologic reserve and increased risk of complications.
All patients diagnosed with splenic injury require hospital admission for observation or surgical management. Only patients definitively shown to have no splenic or intra-abdominal injury may be safely discharged.
Key pitfalls include relying too heavily on physical examination, missing occult bleeding, and underestimating injury severity in initially stable patients. Early imaging, repeated reassessment, and careful monitoring are essential to prevent delayed recognition of life-threatening hemorrhage.
