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Foreign Body Removal
Gastrointestinal Foreign Body Removal is an endoscopic or surgical procedure to safely extract accidentally swallowed objects from the oesophagus, stomach, or intestines — preventing life-threatening complications including perforation, obstruction, and aspiration.
Overview
Gastrointestinal foreign body ingestion is a common clinical emergency affecting both children and adults, ranging from accidentally swallowed coins, fish bones, and dental prostheses to sharp or toxic objects requiring urgent removal. The majority of ingested foreign bodies pass spontaneously, but those lodged in the oesophagus, at the pylorus, or sharp, long, or toxic objects anywhere in the GI tract require prompt endoscopic or surgical removal to prevent serious complications. Flexible upper endoscopy is the preferred and most effective method for removing upper gastrointestinal foreign bodies in the vast majority of cases, providing immediate relief and rapid discharge.
Types of Foreign Body Removal
The technique and urgency of removal depend on the nature of the object, its location, and the presence of complications.
- Endoscopic Retrieval (upper endoscopy using graspers, nets, or forceps — preferred method)
- Flexible Colonoscopic Retrieval (for objects lodged in the colon or rectum)
- Rigid Oesophagoscopy (for objects firmly impacted in the upper oesophagus)
- Surgical Open or Laparoscopic Removal (for objects causing perforation or endoscopic failure)
- Button Battery Emergency Retrieval (requires immediate endoscopy within 2 hours of ingestion)
Risk Factors for Foreign Body Ingestion
Foreign body ingestion affects specific populations and occurs in predictable clinical contexts. Recognising these helps in prevention and appropriate patient triage.
- Young children aged 6 months to 6 years — the most common highest-risk group
- Psychiatric conditions associated with intentional ingestion of large or multiple objects
- Oesophageal disease (strictures, achalasia) predisposing to food bolus impaction
- Dental prosthesis wearers unable to feel food textures clearly
- Elderly patients with dentures or cognitive impairment
- Alcohol intoxication significantly increasing the risk of inadvertent swallowing
Foreign Body Ingestion Symptoms
Symptoms vary depending on the object, its location, and whether complications have already developed. Prompt recognition and specialist assessment are essential.
- Dysphagia — difficulty or inability to swallow indicating oesophageal lodgement
- Drooling and hypersalivation in oesophageal obstruction
- Odynophagia — pain on swallowing from mucosal injury
- Retrosternal chest pain or pressure from oesophageal distension
- Vomiting or regurgitation of food and liquid
- Coughing and choking suggesting airway involvement
- Abdominal pain, distension, or peritonism indicating potential perforation
- Asymptomatic in many cases of smooth objects that have passed into the stomach
Key Benefits
Discover the advantages of choosing our foreign body removal services.
Immediate relief from the distressing symptoms of oesophageal or gastric foreign body obstruction
Safe extraction prevents the risk of perforation, haemorrhage, and aspiration
Button battery removal prevents permanent tissue damage from electrochemical necrosis
Short procedure with rapid recovery and same-day discharge in most uncomplicated cases
Avoids open surgical removal in the vast majority of gastrointestinal foreign body cases
Clinical Features
The technology, techniques and clinical approach behind our foreign body removal.
Emergency endoscopy capability for button batteries requiring removal within 2 hours
Multiple specialised retrieval devices available for different object types and locations
Real-time direct endoscopic vision throughout the entire removal procedure
Paediatric-sized endoscopes available for infant and young child foreign body removal
Assessment of mucosal injury at the time of removal and appropriate treatment initiated
Preparation Instructions
- Fast immediately upon presentation — nothing by mouth until the location and management plan are confirmed
- Complete a chest and abdominal X-ray to locate radiopaque objects and rule out free gas
- CT neck, chest, and abdomen may be required for radiolucent objects or if perforation is suspected
- Blood tests including CBC, coagulation, and blood group should be obtained
- Establish intravenous access before the procedure
- Inform the endoscopy team of the object type, time of ingestion, and all symptoms
- Button battery ingestion requires immediate emergency endoscopy without delay regardless of fasting status
- Children require paediatric anaesthetic dosing and appropriately sized paediatric instruments
The Procedure
Step-by-step guide to what you can expect during your foreign body removal procedure.
Clinical Assessment and Localisation
Your gastroenterologist or surgeon reviews the history of ingestion — what was swallowed, when, and current symptoms — alongside chest and abdominal X-rays and CT imaging where required to precisely locate the foreign body and assess whether there is any evidence of mucosal injury, perforation, or airway compromise.
Urgent Triage Based on Object Type
The urgency of removal depends on the nature of the swallowed object. Button batteries require emergency endoscopy within 2 hours due to the risk of rapid mucosal liquefactive necrosis. Sharp objects, long objects, and objects causing complete oesophageal obstruction are treated as urgent. Round, smooth objects in the stomach may be observed short-term.
Anaesthesia and Endoscope Preparation
Appropriate sedation or general anaesthesia is administered based on the patient's age, cooperation, and the likely difficulty of extraction. The most appropriate retrieval device — Dormia basket, Roth net, rat tooth forceps, or polypectomy snare — is selected and loaded on the endoscope before insertion.
Careful Endoscopic Navigation to the Object
The flexible endoscope is guided through the mouth to the precise location of the foreign body under direct vision. The endoscopist approaches the object carefully, assessing the surrounding mucosa for injury and identifying the safest grasping point to enable controlled extraction.
Controlled Retrieval and Mucosal Assessment
The foreign body is grasped securely with the chosen retrieval device and withdrawn through the oesophagus under continuous direct vision — withdrawing the endoscope and object together to prevent the object from slipping or causing additional injury during removal. The entire mucosa is examined for injury after successful extraction.
Post-Removal Care and Safety Netting
After successful removal, you recover briefly in the endoscopy unit. Your team explains the mucosal findings and any recommended treatment such as proton pump inhibitors for mucosal injury. Clear written guidance is provided on symptoms warranting immediate return, and a follow-up is arranged for cases with significant mucosal injury.
What to Expect
Foreign Body Removal via endoscopy is performed under conscious sedation or general anaesthesia, taking 20 to 45 minutes. The endoscope is passed smoothly to reach the foreign body, which is grasped with the appropriate retrieval device and removed carefully under direct vision. Most patients feel immediate relief from dysphagia and discomfort as soon as the object is removed. Discharge is typically the same day after a brief observation period.
Recovery
Start with sips of clear fluid and progress to soft foods as comfort allows over the first 24 hours, particularly if there was mucosal injury. Take prescribed proton pump inhibitor medication to protect the oesophageal mucosa during healing. Attend the scheduled follow-up so your gastroenterologist can review findings and address any underlying oesophageal condition that may have contributed to the impaction. Return to the emergency department immediately for worsening chest pain, new fever, severe abdominal pain, or difficulty swallowing after discharge.
Frequently Asked Questions
Common questions about foreign body removal.
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