Pulmonology · Airway Obstruction
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The right mainstem bronchus is the most common site for foreign body aspiration due to its wider, more vertical, and shorter anatomy compared to the left.
The classic clinical presentation is the sudden onset of choking, coughing, and wheezing in a toddler or child.
Unilateral wheezing or decreased breath sounds on the affected side is the most reliable physical exam finding.
Hyperinflation of the affected lung on expiratory chest X-ray occurs due to a ball-valve effect trapping air during expiration.
Rigid bronchoscopy is the gold standard for both the diagnosis and definitive removal of an aspirated foreign body.
Radiolucent objects, such as peanuts or organic matter, are frequently missed on initial plain film radiography.
Asymptomatic intervals may occur after the initial choking episode, leading to a delayed diagnosis and potential complications like recurrent pneumonia or bronchiectasis.
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A 2-year-old boy is brought to the emergency department by his parents after a sudden episode of coughing and gagging while eating peanuts. On physical examination, the child is in no acute distress, but there is diminished breath sounds and localized wheezing heard over the right lower lung field. A chest X-ray is performed, which shows hyperinflation of the right lung compared to the left. The child's oxygen saturation is 98% on room air.
What is the most appropriate next step in management?
Rigid bronchoscopy
The patient's presentation of sudden choking and unilateral wheezing is classic for foreign body aspiration, and the expiratory hyperinflation confirms the diagnosis; rigid bronchoscopy is required for definitive removal.
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Etiology / Epidemiology
Most common in children < 3 years due to oral exploration and immature dentition. Right mainstem bronchus is the most frequent site due to wider, more vertical anatomy.
Clinical Manifestations
Classic triad: sudden onset choking, wheezing, and diminished breath sounds. Respiratory distress is a medical emergency.
Diagnosis
Rigid bronchoscopy is the gold standard for both diagnosis and removal. Expiratory chest X-ray may show air trapping.
Treatment
Rigid bronchoscopy is the definitive treatment. Do not perform blind finger sweeps as this may push the object deeper.
Prognosis
Most recover fully with prompt removal. Post-obstructive pneumonia and bronchiectasis are the primary long-term complications.
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Epidemiology & Etiology
Predominantly affects toddlers during play or eating. Common objects include peanuts, seeds, and small toys. Adults with impaired swallowing reflexes (e.g., stroke, sedation) are also at high risk.
Pertinent Anatomy
The right mainstem bronchus is shorter, wider, and more vertical than the left, making it the primary site of impaction. Objects may also lodge in the larynx or trachea, causing more severe airway compromise.
Pathophysiology
Aspiration leads to partial or complete airway obstruction. Partial obstruction acts as a ball-valve mechanism, causing hyperinflation of the distal lung segment. Complete obstruction leads to atelectasis and potential secondary infection.
Clinical Manifestations
Presentation ranges from asymptomatic to acute respiratory failure. Look for unilateral wheezing or asymmetric breath sounds on auscultation. Cyanosis and stridor indicate severe, proximal obstruction requiring immediate intervention.
Diagnosis
Initial imaging includes inspiratory and expiratory chest X-rays to identify air trapping. If clinical suspicion is high, rigid bronchoscopy is the gold standard for definitive diagnosis and therapeutic retrieval, even if imaging is negative.
Treatment
For stable patients, rigid bronchoscopy is the procedure of choice. Blind finger sweeps are strictly contraindicated. If the patient is choking and unable to breathe, perform Heimlich maneuver (or back blows/chest thrusts in infants) until the object is expelled or the patient becomes unconscious.
Prognosis
Early removal prevents post-obstructive pneumonia and chronic bronchiectasis. Patients should be monitored for laryngeal edema post-procedure, which may require a short course of corticosteroids.
Differential Diagnosis
Asthma: typically bilateral wheezing and history of atopy
Croup: presents with barking cough and steeple sign
Epiglottitis: presents with tripod positioning and drooling
Pneumonia: presents with fever and consolidation on imaging
Bronchiolitis: viral etiology with diffuse crackles and wheezing