Ketone production is a hallmark of which diabetic emergency?

• A. Diabetic ketoacidosis
• B. Hyperosmolar hyperglycemic state
• C. Hypoglycemic crisis
• D. Lactic acidosis

Answer: (A)

Ketone production happens when insulin is severely deficient and counterregulatory hormones are high, which drives fat breakdown. The liver then converts the released fatty acids into ketone bodies (like acetoacetate and beta-hydroxybutyrate). Their accumulation creates the characteristic high anion-gap metabolic acidosis seen in diabetic ketoacidosis. Clinically, this emergency presents with dehydration, very high blood glucose, nausea or abdominal pain, fruity breath, and rapid breathing, along with ketones detected in blood or urine. Hyperosmolar hyperglycemic state can have very high glucose and dehydration but has little ketone production, while a hypoglycemic crisis centers on dangerously low glucose and does not feature ketone-driven acidosis. Lactic acidosis involves elevated lactate from poor perfusion or oxygen delivery and is not defined by ketone production.