Management of Magnet Ingestion

Critical Understanding and Immediate Management

The World Journal of Emergency Surgery recommends proceeding immediately to emergent endoscopy (within 2-6 hours) regardless of negative x-ray findings, as magnets require urgent removal due to high risk of pressure necrosis, perforation, and fistula formation 1
Plain radiographs have a false-negative rate up to 47% for foreign body detection, and can miss certain objects entirely, according to the World Journal of Emergency Surgery 2, 3
The absence of radiographic findings does NOT exclude magnet ingestion when history is suggestive, as stated by the World Journal of Emergency Surgery 1, 3

A CT scan should be performed immediately as it has 90-100% sensitivity compared to only 32% for plain x-rays, according to the World Journal of Emergency Surgery 2, 3
CT will definitively identify the magnet(s), determine exact location, number of magnets, and assess for early complications (perforation, obstruction, fistula formation), as recommended by the World Journal of Emergency Surgery 2, 3

Emergent flexible endoscopy is mandated for magnet ingestion due to risk of pressure necrosis between magnets or between magnet and other metallic objects, according to the World Journal of Emergency Surgery 1
This timeframe applies regardless of whether single or multiple magnets are suspected, as stated by the World Journal of Emergency Surgery 1

Never rely on negative x-ray to exclude magnet ingestion when history is positive, as warned by the World Journal of Emergency Surgery 2, 3
Do not use contrast swallow studies—they increase aspiration risk and impair endoscopic visualization, according to the World Journal of Emergency Surgery 2, 3
Even a single magnet is dangerous if there is any possibility of multiple magnets or co-ingestion with other metallic objects, as noted by the World Journal of Emergency Surgery 1

Patients with psychiatric illness or dementia may require sedation during endoscopy, but airway safety and the ability to perform the procedure emergently should be prioritized, as recommended by the Anaesthesia guideline society 4