An 80 year old man presents with pain in the upper abdomen for 1 day, in association with anorexia and nausea. There was no history of chest pain, dyspnea, cough, or urinary or bowel symptoms.
He was diagnosed with diabetes mellitus 10 years ago, which is well controlled on Metformin alone. His medical and surgical histories are otherwise unremarkable.
His random capillary glucose is 280 mg/dl. Serial ECGs are found to be normal. Serum amylase, lipase, liver functions, renal functions, and electrolytes are within normal parameters.