Deep, rapid respirations in a hyperglycemic patient are most characteristic of which condition?

• A. Pulmonary embolism
• B. Hypoglycemic crisis
• C. Hyperosmolar hyperglycemic nonketotic coma
• D. Diabetic ketoacidosis

Answer: (D)

Deep, rapid respirations signal a compensatory response to metabolic acidosis, specifically Kussmaul breathing. In diabetic ketoacidosis, lack of insulin triggers rapid ketone production, creating a high-acid state. The body tries to correct this by blowing off more CO2 through deep, rapid breaths, which is why this breathing pattern is most characteristic of DKA.

Hyperosmolar hyperglycemic nonketotic coma involves severe high blood glucose with little ketosis, so the notable acid-base-driven breathing pattern isn’t as prominent. A hypoglycemic crisis presents with neuro symptoms rather than this distinctive breathing. A pulmonary embolism can cause increased breathing rate but not the ketoacidosis-driven deep, labored pattern seen in DKA.