Foreign Bodies in the Throat: Assessment, Diagnosis and Emergency Management
Foreign bodies in the throat may lodge in the oropharynx, hypopharynx, larynx or cervical oesophagus. They can cause complete airway obstruction, mucosal injury, perforation or delayed infection. Airway status determines the first action.
Inability to breathe, speak or cough effectively, silent airflow, cyanosis, collapse, severe stridor or rapidly worsening distress indicates critical airway obstruction. Start age-appropriate choking management and summon emergency airway help immediately.
Learning objectives
- Classify throat foreign bodies by site and object type.
- Recognise complete obstruction, partial obstruction and oesophageal impaction.
- Select safe examination, imaging and endoscopic procedures.
- Outline emergency and definitive management, complications and prevention.
Common objects and high-risk groups
| Group | Common foreign bodies | Special risk |
|---|---|---|
| Young children | Food, bones, seeds, coins, toy parts, batteries | Narrow airway, unwitnessed events and poor symptom description. |
| Adults | Fish/chicken bones, meat bolus, dentures | Dental appliances, poor chewing, alcohol or neurological disease. |
| Older adults | Meat, tablets, dentures | Dysphagia, stroke, Parkinsonism and reduced airway reflexes. |
| Any age | Sharp metal, glass, button batteries, multiple magnets | Perforation, electrical/chemical burns and tissue necrosis. |
Anatomical sites
Object may be visible in a tonsil, tongue base or vallecula; local pain and foreign-body sensation predominate.
Stridor, hoarseness, cough, aphonia, drooling or acute respiratory distress.
Dysphagia, odynophagia, drooling, food refusal, retrosternal discomfort or regurgitation.
Pathophysiology
A foreign body may obstruct airflow mechanically or trigger laryngospasm and oedema. Impacted food can compress mucosa, causing ischaemia and ulceration. Sharp objects can perforate the pharynx or oesophagus, while a button battery produces electrical and caustic injury within a short time. Prolonged impaction increases the risk of necrosis, fistula and deep-neck or mediastinal infection.
Clinical presentation
- Sudden choking or coughing during eating or play.
- Throat pain, persistent foreign-body sensation or localised pricking pain.
- Drooling, inability to swallow saliva, dysphagia or odynophagia.
- Stridor, wheeze, hoarseness, reduced air entry or cyanosis.
- Neck tenderness, swelling, crepitus, fever, chest pain or haematemesis in complicated cases.
Symptoms can persist after a foreign body has passed because of a mucosal scratch; however, ongoing focal pain, drooling, dysphagia or abnormal examination requires investigation.
Emergency assessment
- Determine obstruction severity: an effective cough and speech imply some airflow; a silent, ineffective cough or inability to speak indicates severe obstruction.
- Call for help: involve emergency medicine, anaesthesia and ENT early.
- Give age-appropriate first aid: use current choking algorithms for responsive adults, children and infants. If the patient becomes unresponsive, begin CPR and inspect the mouth only for a clearly visible object.
- Avoid blind sweeps: never push an unseen object deeper with fingers or instruments.
- After relief: reassess airway, breathing and circulation; complications or retained fragments may remain.
A button battery in the oesophagus, a sharp or long object, complete oesophageal obstruction, airway symptoms, perforation signs or significant bleeding requires immediate specialist removal. Do not give food or drink while awaiting urgent assessment.
History and examination
- Time and circumstances, witnessed choking, object type, size and material.
- Ability to breathe, speak, cough and swallow saliva; progression since onset.
- Previous dysphagia, strictures, surgery, reflux, neurological disease or dentures.
- Inspect the mouth and oropharynx with good light and suction available, but avoid probing blindly.
- Assess voice, stridor, chest air entry, neck swelling/tenderness and subcutaneous emphysema.
Flexible nasolaryngoscopy can identify pharyngeal or laryngeal objects in a stable, cooperative patient. When critical obstruction is suspected, examination belongs in a controlled airway setting.
Investigations
| Test | Use | Limitations/cautions |
|---|---|---|
| Plain neck/chest radiographs | Identify radiopaque objects, level, prevertebral swelling, air or aspiration signs. | Fish bones, wood, plastic and food may be radiolucent; a normal film does not exclude them. |
| Two-view radiography for coins/batteries | Differentiate location and characteristic appearance; assess orientation. | Do not delay urgent battery removal. |
| CT neck/chest | Detect radiolucent or sharp objects, perforation, abscess and deep-space complications. | Use when the patient is stable and findings will guide management. |
| Flexible or rigid endoscopy | Direct diagnosis and removal from pharynx, larynx or oesophagus. | Requires trained staff, appropriate airway planning and anaesthesia where indicated. |
Contrast swallow is not a routine first test when endoscopy is likely because contrast can delay care, obscure the field and worsen aspiration risk. Use only after specialist discussion.
Definitive management
Visible oropharyngeal object
A superficial, clearly seen object may be removed with appropriate forceps by a trained clinician under good illumination, suction and airway preparation. Stop if the object is deeply embedded, difficult to grasp, near major vessels or the patient cannot cooperate.
Laryngeal or bronchial object
Maintain oxygenation and arrange urgent rigid endoscopy/bronchoscopy with ENT, anaesthesia and paediatric expertise as appropriate. Repeated blind instrumentation can convert partial obstruction into complete obstruction.
Oesophageal object or food bolus
- Keep nil by mouth, provide IV access, analgesia and suction for secretions.
- Urgent endoscopic removal is required for complete obstruction, sharp objects, button batteries and high-risk objects.
- Other oesophageal objects require timely specialist removal or observation according to size, location, symptoms and local protocol.
- After food-bolus removal, investigate underlying stricture, eosinophilic oesophagitis, tumour or motility disorder when appropriate.
Do not induce vomiting, force food or bulky material to “push it down,” perform blind finger sweeps, or repeatedly probe with forceps. Do not delay treatment of an oesophageal battery or sharp object while awaiting symptoms.
Complications
- Complete airway obstruction, hypoxia, cardiac arrest or aspiration.
- Mucosal laceration, oedema, bleeding and vocal-fold injury.
- Pharyngeal or oesophageal perforation, surgical emphysema, deep-neck abscess and mediastinitis.
- Pressure necrosis, stricture, tracheo-oesophageal or vascular fistula.
- Pneumonia, lung abscess or chronic cough from missed aspiration.
Observation and discharge
After uncomplicated removal, observe until breathing, swallowing and voice are satisfactory and sedative effects have resolved. Give clear return instructions for fever, increasing pain, drooling, dysphagia, breathing difficulty, neck swelling, chest pain, vomiting blood or persistent cough.
Prevention
- Supervise young children during meals and keep small objects, batteries and magnets locked away.
- Cut high-risk foods appropriately and teach children to sit while eating.
- Check dentures and address swallowing difficulty in neurological or older patients.
- Educate caregivers about age-appropriate choking first aid.
Review the anatomy of the pharynx, anatomy of the larynx, anatomy of the oesophagus and physiology of swallowing.
Key examination points
- Airway assessment precedes detailed history or imaging.
- Never perform blind finger sweeps or blind instrumentation.
- Radiolucent objects can be missed on plain X-ray.
- Button batteries and sharp objects demand urgent specialist action.
- Persistent dysphagia after removal requires evaluation for injury or underlying disease.
References and further reading
- NCBI Bookshelf: Foreign Body Airway Obstruction.
- MSD Manual Professional: Gastrointestinal Foreign Bodies.
- Resuscitation Council UK: Choking and resuscitation guidance.
For education only. Apply current Uganda Clinical Guidelines, age-appropriate basic life-support algorithms, local protocols and specialist advice.
