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# Foreign-body airway obstruction (choking)

Choking happens when food or an object blocks the airway. Severe blockage stops breathing within minutes and needs immediate first aid.

Updated 2026-11-01

## Structures involved

Tap one to see what it is and open it in 3D.

- [Epiglottis](https://durgical.com/en/anatomy/epiglottis/)
- [Trachea](https://durgical.com/en/anatomy/trachea/)
- [Main bronchi](https://durgical.com/en/anatomy/right-main-bronchus/)
- [Vocal folds](https://durgical.com/en/anatomy/vocal-fold/)
- [Pharynx](https://durgical.com/en/anatomy/pharynx/)
- [Cricoid cartilage](https://durgical.com/en/anatomy/cricoid-cartilage/)
- [Thyroid cartilage](https://durgical.com/en/anatomy/thyroid-cartilage/)
- [Lobar bronchi](https://durgical.com/en/anatomy/lobar-bronchus/)
- [Diaphragm](https://durgical.com/en/anatomy/diaphragm/)

## Why it happens

- [Airway defenses, cough and mucociliary clearance](https://durgical.com/en/physiology/airway-defenses-cough-and-mucociliary-clearance/)
- [The causes of hypoxemia](https://durgical.com/en/physiology/the-causes-of-hypoxemia/)
- [Hypoxemic and hypercapnic respiratory failure](https://durgical.com/en/physiology/hypoxemic-and-hypercapnic-respiratory-failure/)

## What it is

Partial or complete blockage of the upper airway (larynx or [trachea](https://durgical.com/en/anatomy/trachea/)) by food or an object. Complete obstruction prevents breathing and speech and leads to hypoxic cardiac arrest within minutes unless relieved.

## Who gets it

A leading cause of accidental death in young children and an important cause in older adults, especially those with swallowing problems. Food is the most common cause in adults; in children, food (nuts, grapes, sausages) and small toys, coins and balloons.

## Causes

- Food bolus (meat, bread) in adults
- Round or small foods and objects in children (nuts, grapes, candy, coins, toy parts, balloons)
- Dentures or dental fragments

## Risk factors

- Age under 4 years
- Older age, dementia, stroke or other causes of dysphagia
- Alcohol or sedative use while eating
- Eating quickly, talking or laughing with food in the mouth
- Poor dentition or ill-fitting dentures

## Pathophysiology

An object lodged at or above the [vocal folds](https://durgical.com/en/anatomy/vocal-fold/) or in the trachea blocks airflow. In partial obstruction air still passes and coughing may expel it; in complete obstruction no air moves, oxygen falls quickly and loss of consciousness and cardiac arrest follow. Smaller objects pass beyond the carina, usually into the [right main bronchus](https://durgical.com/en/anatomy/right-main-bronchus/) (foreign-body aspiration).

## Classification

- Mild (partial) obstruction: effective cough, can speak or cry
- Severe obstruction: ineffective or silent cough, cannot speak or breathe
- Conscious versus unconscious victim; adult, child or infant

## Symptoms and signs

- Sudden onset while eating or playing
- Clutching the throat (universal choking sign)
- Coughing, gagging or stridor in partial obstruction
- Inability to speak, cough or breathe in severe obstruction
- Cyanosis, panic, then loss of consciousness

## Red flags

- Silent cough or no air movement
- Cyanosis or falling consciousness
- Unresponsiveness (cardiac arrest)
- Persistent cough, wheeze or stridor after the episode (retained object)

## Diagnosis

**Clinical**
Recognition is clinical and immediate: sudden respiratory distress during eating, with the choking sign or inability to speak. Treatment begins without tests.

**Tests**
Pulse oximetry once breathing is restored.

**Imaging**
In stable patients after the event: neck and [chest](https://durgical.com/en/anatomy/region/chest/) X-rays (only radiopaque objects are visible; air trapping on expiratory films suggests a bronchial object). Laryngoscopy or bronchoscopy confirms and removes a retained object.

## Differential diagnosis

- Anaphylaxis with laryngeal oedema
- Epiglottitis or croup
- Acute severe asthma
- Cardiac arrest or stroke during a meal
- Panic attack

## Goal of treatment

Relieve the obstruction immediately with age-appropriate manoeuvres, start CPR if the person becomes unresponsive, and remove any retained object in hospital.

## Treatment

**Acute**
Mild obstruction: encourage coughing and watch closely; no blows or thrusts while the cough is effective.

**Acute**
Severe obstruction in adults and children over 1 year: back blows and abdominal thrusts (Heimlich manoeuvre), repeated until the object comes out; chest thrusts in pregnancy or obesity. Infants: back blows alternating with chest thrusts, never abdominal thrusts.

**Acute**
If unresponsive: call for help and start CPR; look in the mouth before breaths and remove only a visible object, without blind finger sweeps.

**Procedure**
In hospital: direct laryngoscopy with forceps, rigid bronchoscopy, or an emergency surgical airway (cricothyrotomy) if the object cannot be removed.

**Follow-up**
Medical review after abdominal thrusts or persistent symptoms, to look for injury or a retained fragment.

## Complications

- Hypoxic brain injury and cardiac arrest
- Injury from thrusts (rib fracture, abdominal organ injury)
- Retained object with pneumonia or atelectasis
- Post-obstructive pulmonary oedema

## Prognosis

Prompt bystander action usually clears the airway with full recovery. Outcome worsens with the time without oxygen; cardiac arrest from choking has a poor prognosis unless relieved quickly.

## Prevention

- Cutting round foods (grapes, sausages) and avoiding nuts and hard candy in young children
- Keeping small objects, coins and balloons away from children; supervision while eating
- Swallowing assessment, texture-modified diets and supervision in older adults with dysphagia
- First-aid and CPR training for families, teachers and caregivers

## Test yourself

Think of the answer, then tap the question to see it.

## How is mild airway obstruction distinguished from severe?

In mild obstruction the person can cough effectively and speak; in severe obstruction the cough is silent and they cannot speak or breathe.

## Which manoeuvres relieve severe choking in a conscious infant?

Back blows alternating with chest thrusts; abdominal thrusts are not used in infants.

## What should be done if a choking person becomes unresponsive?

Call for help and start CPR, checking the mouth for a visible object before breaths; no blind finger sweeps.

## Which manoeuvre replaces abdominal thrusts in a pregnant or obese person?

Chest thrusts.

[Add to my cards (4)](https://durgical.app/estudiar/?add=/en/conditions/foreign-body-airway-obstruction/)

## Related conditions

- [Foreign body aspiration in children](https://durgical.com/en/conditions/foreign-body-aspiration-in-children/)
- [Cardiac arrest (VF, pulseless VT, asystole, PEA)](https://durgical.com/en/conditions/cardiac-arrest/)
- [Aspiration pneumonia and pneumonitis](https://durgical.com/en/conditions/aspiration-pneumonia-and-pneumonitis/)
- [Atelectasis](https://durgical.com/en/conditions/atelectasis/)
- [Acute epiglottitis](https://durgical.com/en/conditions/acute-epiglottitis/)
- [Croup (laryngotracheobronchitis)](https://durgical.com/en/conditions/croup/)
- [Anaphylaxis](https://durgical.com/en/conditions/anaphylaxis/)
- [Asthma](https://durgical.com/en/conditions/asthma/)
- [Foreign bodies of the ear and nose](https://durgical.com/en/conditions/foreign-bodies-of-the-ear-and-nose/)

Educational information, not medical advice. For any symptom, see a health professional.

Sources: [Choking - adult or child over 1 year](https://medlineplus.gov/ency/article/000049.htm) (MedlinePlus, US National Library of Medicine, 2026); [Choking - infant under 1 year](https://medlineplus.gov/ency/article/000048.htm) (MedlinePlus, US National Library of Medicine, 2026).

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Source: https://durgical.com/en/conditions/foreign-body-airway-obstruction/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/conditions/foreign-body-airway-obstruction/