Button Battery Ingestion - Complete Clinical Guide

1. Mechanism of Injury

1. Electrolysis / electrical current - When both poles contact moist mucosa, an external electrical circuit forms, hydrolyzing tissue fluid and generating hydroxide at the negative terminal, rapidly raising local pH (liquefactive alkaline necrosis)
2. Pressure necrosis - Direct mechanical compression at the lodgment site
3. Alkaline leakage - Battery electrolyte leaks in a saline environment, causing chemical burns
4. Release of toxic compounds - Mercury and other heavy metals cause systemic toxicity

Tissue injury begins within 15 minutes. Serious burns occur within 2-2.5 hours. Perforation can occur within 6 hours.

• Rosen's Emergency Medicine, p. 1221
• Scott-Brown's Otorhinolaryngology (Vol 2), p. 434
• Tintinalli's Emergency Medicine, Chapter 77

2. Sites Where Button Batteries Get Lodged

Esophagus (Most dangerous - majority of severe injuries)

• Upper esophagus (posterior wall) - Tracheoesophageal fistula, tracheal necrosis, vertebral osteomyelitis/spondylodiscitis
• Mid esophagus (aortic arch level) - Aortoesophageal fistula (catastrophic, often fatal hemorrhage)
• In general - Esophageal perforation, mediastinitis, vocal cord palsy, stricture formation

Stomach

• Battery usually passes through but can be retained if large diameter (≥15-20 mm) in young children
• Less mucosal contact with both poles simultaneously, so injury risk is lower
• Can still cause ulceration and bleeding

Small Intestine

• Rare lodgment site (1.3% of serious injuries)
• Ileocecal valve is an anatomical narrowing where large batteries may arrest

Pylorus

• Functional narrowing where batteries ≥20 mm may not pass, especially in children under 6 years

Beyond the Colon

• Once past the ileocecal valve, passage is usually uneventful

Note: Button batteries also lodge in the nose and external auditory canal (not GI tract) causing septal ulceration/perforation, turbinate necrosis, and tympanic membrane perforation respectively.

• Rosen's Emergency Medicine, p. 1221
• Scott-Brown's Otorhinolaryngology (Vol 2), p. 434

3. GI Transit Times (Time Duration at Each Location)

• Cummings Otolaryngology, Chapter on Esophagoscopy
• Tintinalli's Emergency Medicine, Chapter 77

4. Radiographic Identification

• The double contour/halo is the hallmark radiographic sign of a button battery
• On lateral view: the battery shows a step-off appearance
• CT (sensitivity 90-100%) is used when radiography is equivocal or when vascular complications are suspected

5. When Intervention IS Required (Indications)

EMERGENT - Immediate Removal (Goal: within 2 hours)

• Battery lodged in the esophagus - this is always an emergency, regardless of symptom status
• Any symptoms (dysphagia, drooling, vomiting, chest pain, respiratory distress)
• Battery in the stomach/beyond with magnet co-ingestion (risk of entrapment across bowel walls = pressure necrosis + perforation)
• Battery in stomach with the patient symptomatic at any age

URGENT Removal (within 24 hours)

• Child is ≤5-6 years old (pylorus too small to pass ≥15 mm batteries reliably)
• Battery diameter is ≥15 mm
• Multiple batteries ingested
• Battery has been in stomach for >4 days without passage
• Battery previously thought to be in esophagus for >2 hours before reaching stomach (consider diagnostic endoscopy to exclude esophageal injury)

Surgical Removal

• Battery has passed beyond the pylorus (out of endoscopic reach) AND the patient has:
  • Occult or visible GI bleeding
  • Abdominal pain / acute abdomen signs
  • Fever, vomiting, profoundly decreased appetite
• Rosen's Emergency Medicine, p. 1221
• Tintinalli's Emergency Medicine (Algorithm Fig 77-3 below)
• National Capital Poison Center guideline (poison.org)

6. When Intervention is NOT Required (Expectant Management / Observation)

1. Battery has passed beyond the esophagus (confirmed radiographically)
2. Patient is entirely asymptomatic and has been since ingestion
3. Only one battery was ingested
4. No magnet was co-ingested
5. Battery diameter is < 12 mm (confirmed by imprint code or identical cell measurement)
6. No prior esophageal surgery or anomaly
7. Patient is >5-6 years old (adequate pyloric diameter)

• Regular diet, encourage activity
• Repeat X-rays at 48 hours to confirm pyloric passage
• Weekly repeat radiographs until confirmed passage in stool
• Return immediately if symptoms develop
• Stool inspection to confirm battery passage

7. Management Algorithm

8. First Aid / Pre-Endoscopy Measures

• Honey: 10 mL every 10 minutes (up to 3 doses) for children ≥12 months - helps coat the battery and slow injury by coating the alkaline lesion
• Sucralfate suspension (1 g/10 mL): 10 mL PO every 10 minutes, up to 3 doses - similar protective mechanism to honey
• Do NOT give honey/sucralfate if ingestion was >12 hours ago (may mask perforation signs)
• These are adjuncts only - they do not replace emergent endoscopy
• Keep patient NPO otherwise
• Do NOT induce vomiting
• Do NOT give Ipecac, chelation, or perform blind bougienage

9. Post-Removal Monitoring

• Repeat chest X-ray post-op to exclude pneumothorax (~0.8%) and pneumomediastinum
• Second-look endoscopy at 2-4 days post removal to assess mucosal injury grade and prognosis
• MRI chest on day 13-15 after removal for high-grade esophageal injuries to assess circumferential inflammation around the aorta/great vessels
• If MRI shows ≥50% circumferential inflammation around the aorta, CTA within 14-17 days post removal to assess aortoesophageal fistula risk
• Soft diet for a full 28 days after removal of esophageal battery
• Monitor for TE fistula: respiratory symptoms, especially with swallowing
• Serial contrast CT or MRI for patients at risk of vascular fistulization

10. Complications Summary

11. Key Epidemiology and Risk Factors

• Children under 4 years are at highest risk (peak incidence 18-48 months)
• Males predominate (57%)
• The CR2032 (20 mm, 3V lithium coin cell) is the most dangerous and most commonly involved
• ~1/3 of patients present with dysphagia; ~1/5 are completely asymptomatic at presentation
• 54% of fatal cases were initially misdiagnosed - making early X-ray mandatory in any suspected ingestion
• 6.7-fold increase in battery ingestion incidents between 1985-2009 due to proliferation of small electronic devices
• National Button Battery Ingestion Hotline (USA): 1-202-625-3333 (poison.org)

12. Foreign Body Ingestion - General Clinical Principles

1. Pediatric patients (>75% of cases)
2. Psychiatric patients / prisoners (intentional)
3. Patients with underlying esophageal disease (strictures, Schatzki ring, eosinophilic esophagitis)
4. Edentulous adults (impaired oral sensation)

• Button batteries (anywhere in GI tract if symptomatic or esophageal)
• Multiple magnets (attract across bowel loops - necrosis + fistula)
• Sharp/pointed objects in esophagus or symptomatic stomach
• Objects >6 cm in length or >2.5 cm in diameter (unable to pass pylorus)
• Any foreign body in esophagus >24 hours (high risk of complications including aorto-enteric fistula)

• Small smooth objects past the pylorus in asymptomatic patients
• Coins that have passed into the stomach in older children with normal anatomy

• Blind finger sweeping (may lodge object in larynx)
• Proteolytic enzymes (Adolph's Meat Tenderizer) for food bolus - causes mucosal necrosis
• Chest physical therapy / bronchodilators for airway FB (may cause complete obstruction)
• Ipecac (no proven benefit, risk of esophageal injury)

• Small intestine: variable
• Mean total intestinal transit: 3.8 days (Cummings Otolaryngology)
• Most foreign bodies that reach the stomach will pass within 4-6 days
• Rosen's Emergency Medicine, p. 1221
• Cummings Otolaryngology, Chapter on Esophagoscopy
• Tintinalli's Emergency Medicine, Chapter 77
• Scott-Brown's Otorhinolaryngology Head and Neck Surgery (Vol 2), p. 434