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Emergency And Acute Medicine – Dysphagia
Basics Description
Dysphagia is defined as difficulty swallowing and may result from neuromuscular or mechanical causes. It can involve impairment at the oropharyngeal or esophageal level, and careful clinical distinction is essential because etiologies, workup, and urgency differ significantly.
Etiology
Oropharyngeal (transfer) dysphagia is characterized by difficulty initiating a swallow and impaired transfer of food from the mouth to the proximal esophagus. Patients often swallow solids more easily than liquids and develop symptoms immediately upon swallowing. Associated features include nasal or oral regurgitation, coughing, choking, drooling, and aspiration. This form is usually due to neuromuscular disorders causing bulbar muscle weakness or impaired coordination.
Esophageal (transport) dysphagia results from failure of normal transit through the esophagus and is associated with a retrosternal sticking sensation occurring seconds after swallowing. Patients may experience nocturnal regurgitation, aspiration, or regurgitation of undigested food, which is characteristic of esophageal obstruction. Causes include motility disorders and mechanical obstruction.
Functional dysphagia is a diagnosis of exclusion after a full evaluation shows no mechanical or neuromuscular pathology, with symptoms lasting longer than 12 weeks.
Odynophagia refers to pain with swallowing and is a separate but often related condition. Pain localization is generally poor; upper esophageal pain is better localized due to somatic innervation, while lower esophageal visceral pain is poorly localized and may mimic acute coronary syndrome.
Pediatric Considerations
In infants and newborns, common causes include prematurity, congenital malformations, neuromuscular disease, infection such as candidiasis, and inflammation. Foreign body aspiration must always be considered. Other pediatric causes include caustic ingestions, infections, neurologic disorders, and sequelae of head injury. Acquired tracheoesophageal fistula may occur after disk battery or caustic ingestion or prior surgery. Life-threatening pediatric causes include epiglottitis, retropharyngeal abscess, central nervous system infection, botulism, esophageal perforation, and diphtheria.
Diagnosis Signs And Symptoms
Symptoms include difficulty initiating swallowing, sensation of food sticking after swallowing, coughing or choking after eating, impaired gag reflex, dysphonia, drooling, dysarthria, and chest pain.
History
Determine whether dysphagia occurs with solids, liquids, or both. Difficulty with both solids and liquids suggests a neuromuscular disorder, whereas solids alone or progression from solids to liquids suggests mechanical obstruction. Immediate symptoms indicate oropharyngeal dysphagia, while delayed symptoms suggest esophageal involvement. Intermittent symptoms suggest rings or webs, whereas progressive symptoms raise concern for peptic or malignant strictures. Acute onset is concerning for life-threatening causes, with food impaction being the most common. Associated symptoms such as nasal regurgitation, choking, heartburn, or weight loss should be elicited.
Physical-Exam
Findings are often subtle or normal. Perform careful oropharyngeal inspection, pulmonary and cardiac auscultation, and a complete neurologic examination with emphasis on cranial nerves V, VII, IX, X, and XII.
Essential Workup
Ensure adequate airway evaluation and perform a thorough neurologic examination.
Diagnosis Tests And Interpretation
Electrocardiogram should be obtained when chest discomfort raises concern for cardiac etiology. No routine laboratory studies are indicated. Chest radiograph may show dilated esophagus in achalasia, aspiration pneumonitis, or extrinsic compression. Lateral neck radiograph may be helpful in selected cases. Modified barium swallow or videofluoroscopy assesses anatomy and function but should not be performed if endoscopy is anticipated. CT or MRI of the head is indicated for new-onset neuromuscular dysphagia. Upper endoscopy allows relief of obstruction, direct visualization, and biopsy when indicated. Esophageal manometry and fiberoptic nasopharyngeal laryngoscopy are usually performed in the outpatient setting.
Differential Diagnosis
Oropharyngeal causes include infections such as botulism and central nervous system infections, mechanical causes including congenital abnormalities and malignancy, medication-induced injury, and neuromuscular disorders such as stroke, amyotrophic lateral sclerosis, Guillain–Barré syndrome, myasthenia gravis, Parkinson disease, multiple sclerosis, and traumatic brain injury. Esophageal causes include mechanical obstruction from diverticula, webs, foreign bodies, neoplasms, strictures, rings, radiation injury, and postsurgical changes; motility disorders such as achalasia and diffuse esophageal spasm; inflammatory conditions including eosinophilic or pill esophagitis; and extrinsic compression from cardiovascular or mediastinal abnormalities.
Treatment Pre Hospital
Maintain vigilant airway monitoring and position the patient comfortably with suction readily available.
Initial Stabilization And Therapy
Maintain airway vigilance and keep the patient NPO. Administer intravenous fluids with 0.9% normal saline for dehydration. Evaluate urgently for life-threatening causes including retropharyngeal abscess or hematoma, epiglottitis, foreign body, upper airway obstruction, and cardiovascular etiologies.
Emergency Department Treatment And Procedures
Nitroglycerin may be used for esophageal spasm. Glucagon may be attempted for food impaction. Treat complications such as airway obstruction, aspiration pneumonia, dehydration, and malnutrition. Endoscopy is indicated when obstruction persists. Dietary modifications include thickened liquids for neuromuscular disorders and thin liquids for mechanical causes.
Medication
Glucagon 1 mg IV may be administered for food impaction, with a second 1 mg dose after 5 minutes if no improvement; pediatric dosing is 0.02–0.03 mg/kg, not exceeding 0.5 mg. Calcium channel blockers and nitrates may be considered for esophageal motility disorders such as achalasia.
Follow-Up And Disposition
Admission is required for persistent esophageal obstruction, inability to protect the airway, inability to tolerate secretions, or compromised hydration or nutrition. Patients who are stable and well hydrated may be discharged with urgent referral to neurology, otolaryngology, or gastroenterology.
Issues For Referral
Next-day follow-up with primary care, ENT, or gastroenterology is recommended.
Follow-Up Recommendations
Clear liquid diet until specialist evaluation. Return immediately for shortness of breath, chest pain, or inability to tolerate secretions.
Pearls And Pitfalls
Always consider foreign body aspiration in children. Dysphagia is a common presentation of stroke and should be considered in patients with recurrent pneumonia. Life-threatening causes must be excluded before deferring evaluation to the outpatient setting.
Basics Description
Dysphagia is defined as difficulty swallowing and may result from neuromuscular or mechanical causes. It can involve impairment at the oropharyngeal or esophageal level, and careful clinical distinction is essential because etiologies, workup, and urgency differ significantly.
Etiology
Oropharyngeal (transfer) dysphagia is characterized by difficulty initiating a swallow and impaired transfer of food from the mouth to the proximal esophagus. Patients often swallow solids more easily than liquids and develop symptoms immediately upon swallowing. Associated features include nasal or oral regurgitation, coughing, choking, drooling, and aspiration. This form is usually due to neuromuscular disorders causing bulbar muscle weakness or impaired coordination.
Esophageal (transport) dysphagia results from failure of normal transit through the esophagus and is associated with a retrosternal sticking sensation occurring seconds after swallowing. Patients may experience nocturnal regurgitation, aspiration, or regurgitation of undigested food, which is characteristic of esophageal obstruction. Causes include motility disorders and mechanical obstruction.
Functional dysphagia is a diagnosis of exclusion after a full evaluation shows no mechanical or neuromuscular pathology, with symptoms lasting longer than 12 weeks.
Odynophagia refers to pain with swallowing and is a separate but often related condition. Pain localization is generally poor; upper esophageal pain is better localized due to somatic innervation, while lower esophageal visceral pain is poorly localized and may mimic acute coronary syndrome.
Pediatric Considerations
In infants and newborns, common causes include prematurity, congenital malformations, neuromuscular disease, infection such as candidiasis, and inflammation. Foreign body aspiration must always be considered. Other pediatric causes include caustic ingestions, infections, neurologic disorders, and sequelae of head injury. Acquired tracheoesophageal fistula may occur after disk battery or caustic ingestion or prior surgery. Life-threatening pediatric causes include epiglottitis, retropharyngeal abscess, central nervous system infection, botulism, esophageal perforation, and diphtheria.
Diagnosis Signs And Symptoms
Symptoms include difficulty initiating swallowing, sensation of food sticking after swallowing, coughing or choking after eating, impaired gag reflex, dysphonia, drooling, dysarthria, and chest pain.
History
Determine whether dysphagia occurs with solids, liquids, or both. Difficulty with both solids and liquids suggests a neuromuscular disorder, whereas solids alone or progression from solids to liquids suggests mechanical obstruction. Immediate symptoms indicate oropharyngeal dysphagia, while delayed symptoms suggest esophageal involvement. Intermittent symptoms suggest rings or webs, whereas progressive symptoms raise concern for peptic or malignant strictures. Acute onset is concerning for life-threatening causes, with food impaction being the most common. Associated symptoms such as nasal regurgitation, choking, heartburn, or weight loss should be elicited.
Physical-Exam
Findings are often subtle or normal. Perform careful oropharyngeal inspection, pulmonary and cardiac auscultation, and a complete neurologic examination with emphasis on cranial nerves V, VII, IX, X, and XII.
Essential Workup
Ensure adequate airway evaluation and perform a thorough neurologic examination.
Diagnosis Tests And Interpretation
Electrocardiogram should be obtained when chest discomfort raises concern for cardiac etiology. No routine laboratory studies are indicated. Chest radiograph may show dilated esophagus in achalasia, aspiration pneumonitis, or extrinsic compression. Lateral neck radiograph may be helpful in selected cases. Modified barium swallow or videofluoroscopy assesses anatomy and function but should not be performed if endoscopy is anticipated. CT or MRI of the head is indicated for new-onset neuromuscular dysphagia. Upper endoscopy allows relief of obstruction, direct visualization, and biopsy when indicated. Esophageal manometry and fiberoptic nasopharyngeal laryngoscopy are usually performed in the outpatient setting.
Differential Diagnosis
Oropharyngeal causes include infections such as botulism and central nervous system infections, mechanical causes including congenital abnormalities and malignancy, medication-induced injury, and neuromuscular disorders such as stroke, amyotrophic lateral sclerosis, Guillain–Barré syndrome, myasthenia gravis, Parkinson disease, multiple sclerosis, and traumatic brain injury. Esophageal causes include mechanical obstruction from diverticula, webs, foreign bodies, neoplasms, strictures, rings, radiation injury, and postsurgical changes; motility disorders such as achalasia and diffuse esophageal spasm; inflammatory conditions including eosinophilic or pill esophagitis; and extrinsic compression from cardiovascular or mediastinal abnormalities.
Treatment Pre Hospital
Maintain vigilant airway monitoring and position the patient comfortably with suction readily available.
Initial Stabilization And Therapy
Maintain airway vigilance and keep the patient NPO. Administer intravenous fluids with 0.9% normal saline for dehydration. Evaluate urgently for life-threatening causes including retropharyngeal abscess or hematoma, epiglottitis, foreign body, upper airway obstruction, and cardiovascular etiologies.
Emergency Department Treatment And Procedures
Nitroglycerin may be used for esophageal spasm. Glucagon may be attempted for food impaction. Treat complications such as airway obstruction, aspiration pneumonia, dehydration, and malnutrition. Endoscopy is indicated when obstruction persists. Dietary modifications include thickened liquids for neuromuscular disorders and thin liquids for mechanical causes.
Medication
Glucagon 1 mg IV may be administered for food impaction, with a second 1 mg dose after 5 minutes if no improvement; pediatric dosing is 0.02–0.03 mg/kg, not exceeding 0.5 mg. Calcium channel blockers and nitrates may be considered for esophageal motility disorders such as achalasia.
Follow-Up And Disposition
Admission is required for persistent esophageal obstruction, inability to protect the airway, inability to tolerate secretions, or compromised hydration or nutrition. Patients who are stable and well hydrated may be discharged with urgent referral to neurology, otolaryngology, or gastroenterology.
Issues For Referral
Next-day follow-up with primary care, ENT, or gastroenterology is recommended.
Follow-Up Recommendations
Clear liquid diet until specialist evaluation. Return immediately for shortness of breath, chest pain, or inability to tolerate secretions.
Pearls And Pitfalls
Always consider foreign body aspiration in children. Dysphagia is a common presentation of stroke and should be considered in patients with recurrent pneumonia. Life-threatening causes must be excluded before deferring evaluation to the outpatient setting.
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