USMLE Prep - Medical Reference Library

Foreign Body Ingestion — Button Batteries & Magnets

System: Otolaryngology • Reviewed: Aug 31, 2025 • Step 1Step 2Step 3

Synopsis:

Button batteries and multiple magnets are GI emergencies. Immediate imaging; urgent endoscopic removal for esophageal button batteries and for ≥2 magnets. Observe single small magnets if distal and asymptomatic with close follow‑up.

Key Points

  • Stabilize ABCs; begin targeted evaluation without delaying life-saving therapy.
  • Use system-specific risk tools to guide testing and disposition.
  • Order high-yield tests first; escalate imaging when indicated.
  • Start evidence-based initial therapy and reassess frequently.

Algorithm

  1. Primary survey and vitals; IV access and monitors.
  2. Focused history/physical; identify red flags and likely etiologies.
  3. Order system-appropriate labs and imaging (see Investigations).
  4. Initiate guideline-based empiric therapy (see Pharmacology).
  5. Reassess response; arrange consultation and definitive management.

Clinical Synopsis & Reasoning

For Foreign Body Ingestion Button Batteries Magnets, frame the differential by acuity and pathophysiology, then align diagnostics to the leading hypotheses. Prioritize stabilization while obtaining high‑yield studies such as CBC (Baseline hematology), BMP (Electrolytes/renal). Incorporate bedside imaging and targeted labs to define severity and identify complications; synthesize results with clinical trajectory to refine the working diagnosis and disposition needs.


Treatment Strategy & Disposition

Initiate disease‑directed therapy alongside supportive care, titrating to objective response. Pharmacologic options commonly include Analgesia/Antipyretics. Use validated frameworks (e.g., Removal Urgency) to guide escalation and site of care. Address precipitating factors, de‑escalate empiric therapies with data, and arrange follow‑up for monitoring and risk‑factor modification; admit patients with instability, high risk of deterioration, or needs for close monitoring.


Management Notes

Apply honey/sucralfate protocols for esophageal button batteries in children while awaiting removal per local guideline. Coordinate with pediatric anesthesia for airway protection.


Epidemiology / Risk Factors

  • Risk factors vary by condition and patient profile

Investigations

TestRole / RationaleTypical FindingsNotes
CBCBaseline hematologyAbnormal counts
BMPElectrolytes/renalDerangements

Removal Urgency

Object/LocationAction
Esophageal button batteryEmergent removal (<2 h)
Gastric button batteryRemove if criteria met; otherwise observe
≥2 magnets anywhereUrgent removal (endoscopy/surgery)
Single small magnet distalObserve closely
Sharp/elongated objectsLow threshold for removal

Pharmacology

MedicationMechanismOnsetRole in TherapyLimitations
AcetaminophenAnalgesic/antipyreticHoursSymptom control as appropriateHepatotoxicity (overdose)
Ondansetron5-HT3 antagonismMinutesAntiemesis if neededQT prolongation

Prognosis / Complications

  • Prognosis depends on severity, comorbidities, and timeliness of care

Patient Education / Counseling

  • Explain red flags and when to seek emergent care.
  • Reinforce medication adherence and follow-up plan.

References

  1. NASPGHAN/ESPGHAN FB Guideline — Link