Successful treatment with artificial pancreas for a patient who attempted suicide using a high‐dose insulin s.c. injection

BACKGROUND: Artificial pancreas is usually used to manage hyperglycemia. We controlled prolonged hypoglycemia induced by insulin overdose using artificial pancreas. CASE PRESENTATION: A 56‐year‐old female patient with type 2 diabetes mellitus was admitted to the emergency department after overdosing on 1,800 units each of insulin aspart and insulin degludec. She had also ingested 2 weeks of anti‐anxiety medication. When the patient arrived at the hospital, her blood glucose level was 30 mg/dL and she was in a coma. Artificial pancreas (STG‐55; Nikkiso, Tokyo, Japan) was used to control blood glucose levels because we were unable to predict the duration or degree of hypoglycemia. Blood glucose levels were safely controlled without the development of hypo‐ or hyperglycemia. Finally, the patient was discharged without any complications on day 7. CONCLUSION: The STG‐55 artificial pancreas was very useful and convenient for controlling blood glucose levels in our insulin overdose patient.