Foreign body ingestion Disc batteries Emergency NaOH, KOH, mercury 1 hour -mucosal damage 2 to 4 hours- muscular layers 8 to 12 hours- perforation Esophagoscopy Observation for gastric location for 4-7 days Laparotomy for bowel perforationForeign Body Ingestion ◼ Disc batteries ◼ Emergency ◼ NaOH, KOH, mercury ◼ 1 hour – mucosal damage ◼ 2 to 4 hours – muscular layers ◼ 8 to 12 hours – perforation ◼ Esophagoscopy ◼ Observation for gastric location for 4-7 days ◼ Laparotomy for bowel perforation