Management of Suspected Throat Foreign Body Not Visible on X-ray

Diagnostic Approach

A negative X-ray does not rule out a foreign body, and symptomatic patients or those with high clinical suspicion should proceed directly to CT scan, followed by laryngoscopy/endoscopy based on findings, as recommended by the American College of Cardiology 1
Plain radiography has a false-negative rate up to 47% for esophageal foreign bodies and up to 85% for food bolus, fish bones, chicken bones, and other non-radiopaque objects 1
Many foreign bodies have very low radiopacity and will not be visualized on plain films, according to the World Journal of Emergency Surgery 2

CT scan is essential for locating non-radiopaque objects, evaluating for perforation, and assessing complications, with a sensitivity of 90-100% and specificity of 93.7-100% for detecting foreign bodies 1, 2
Obtain contrast-enhanced CT of the neck and chest in hemodynamically stable patients with suspected perforation 2
CT should evaluate for pneumomediastinum, subcutaneous emphysema, and soft tissue inflammation suggesting perforation 1

Perform thorough visual inspection of the oropharynx looking for visible foreign bodies that can be manually extracted, as recommended by the American Heart Association 3, 4, 5
Never perform blind finger sweeps, as this can impact the foreign body deeper or cause injury to the nasopharynx, according to the American Heart Association 3, 6, 7, 4, 5
If the patient has ineffective cough and suspected airway obstruction, encourage coughing first, then use back blows initially if coughing is ineffective, and follow with abdominal thrusts if back blows fail, as recommended by the American Heart Association 3, 4, 5, 6, 7

Complete blood count (CBC), C-reactive protein (CRP), and inflammatory markers may be ordered for symptomatic patients requiring intervention, as recommended by the American College of Cardiology 1, 2
Endoscopy is recommended for patients with complete esophageal obstruction, sharp-pointed objects, button/disk batteries, and magnets, with emergent endoscopy (within 2-6 hours) indicated for these cases, according to the American College of Gastroenterology 1
Urgent endoscopy (within 24 hours) is recommended for patients with partial esophageal obstruction, food bolus impaction without complete obstruction, and persistent symptoms despite negative imaging, as recommended by the American College of Gastroenterology 1

In patients with suspected perforation and hemodynamic instability, proceed directly to surgical intervention without delaying for imaging, as recommended by the World Journal of Emergency Surgery 2
Esophageal foreign bodies require intervention due to aspiration and perforation risk, with gentle pushing into stomach during endoscopy first, then retrieval if pushing fails, according to the American College of Cardiology 1