Which feature best differentiates diabetic ketoacidosis from hyperosmolar hyperglycemic state?

Which feature best differentiates diabetic ketoacidosis from hyperosmolar hyperglycemic state?

• A. Presence of significant ketosis
• B. Marked hyperosmolarity with ketosis absent
• C. Normal serum bicarbonate with ketosis
• D. Lower glucose level than in DKA

Answer: (A)

The clearest difference is ketosis. Diabetic ketoacidosis happens when there’s not enough insulin, so the body ramps up lipolysis and hepatic ketogenesis, leading to significant ketone production and a resulting anion-gap metabolic acidosis. In contrast, hyperosmolar hyperglycemic state usually has some insulin activity that suppresses ketogenesis, so ketosis is minimal or absent even though glucose is extremely high and serum osmolarity is markedly elevated. So detecting significant ketones in the blood or urine points toward DKA, while an absence of meaningful ketosis with very high glucose and high osmolality points toward HHS.

The clearest difference is ketosis. Diabetic ketoacidosis happens when there’s not enough insulin, so the body ramps up lipolysis and hepatic ketogenesis, leading to significant ketone production and a resulting anion-gap metabolic acidosis. In contrast, hyperosmolar hyperglycemic state usually has some insulin activity that suppresses ketogenesis, so ketosis is minimal or absent even though glucose is extremely high and serum osmolarity is markedly elevated.

So detecting significant ketones in the blood or urine points toward DKA, while an absence of meaningful ketosis with very high glucose and high osmolality points toward HHS.