A patient with altered mental status, high blood glucose levels, and deep, rapid breathing may have a condition known as __________.

• A. hyperglycemic crisis
• B. hypoglycemic crisis
• C. hyperosmolar hyperglycemic nonketotic coma
• D. diabetic ketoacidosis

Answer: (D)

Deep, rapid breathing with altered mental status and high blood glucose points to diabetic ketoacidosis. When insulin is lacking, the body can’t use glucose and starts breaking down fats, producing ketones. Those ketones create a metabolic acidosis, and the body responds with rapid, deep breaths (Kussmaul breathing) to blow off excess CO2. This combination of hyperglycemia, dehydration, ketosis, and acidosis drives the characteristic breathing pattern and mental status changes seen in DKA.

Other options don’t fit as well: a general hyperglycemic crisis is a broad label that includes DKA and hyperosmolar states, but the key feature here is ketosis with acidosis, which points to DKA. A hypoglycemic crisis involves low blood glucose, not high. The hyperosmolar hyperglycemic state involves very high glucose with little or no ketosis or acidosis, so respiratory pattern isn’t the same.