Which condition is characterized by very high blood glucose (often 600-1200 mg/dL) and osmolarity >320 mOsm/L?

Which condition is characterized by very high blood glucose (often 600-1200 mg/dL) and osmolarity >320 mOsm/L?

• A. Diabetic ketoacidosis
• B. Hypoglycemia
• C. Hyperglycemia without ketosis
• D. Hyperosmolar hyperglycemic state

Answer: (D)

Hyperosmolar hyperglycemic state is defined by extremely high blood glucose (often 600–1200 mg/dL) with serum osmolality above 320 mOsm/kg and little or no ketosis. The key idea is that there is enough insulin to suppress ketone formation, so there isn’t the acidosis seen in diabetic ketoacidosis, but not enough to prevent severe hyperglycemia and osmotic diuresis. The result is profound dehydration and high serum osmolality, which commonly presents with altered mental status, especially in older adults with type 2 diabetes. This combination—huge glucose with very high osmolality and minimal ketosis—distinguishes it from diabetic ketoacidosis (which has acidosis and ketosis), hypoglycemia (low glucose), or hyperglycemia without the osmolar imbalance.

Hyperosmolar hyperglycemic state is defined by extremely high blood glucose (often 600–1200 mg/dL) with serum osmolality above 320 mOsm/kg and little or no ketosis. The key idea is that there is enough insulin to suppress ketone formation, so there isn’t the acidosis seen in diabetic ketoacidosis, but not enough to prevent severe hyperglycemia and osmotic diuresis. The result is profound dehydration and high serum osmolality, which commonly presents with altered mental status, especially in older adults with type 2 diabetes. This combination—huge glucose with very high osmolality and minimal ketosis—distinguishes it from diabetic ketoacidosis (which has acidosis and ketosis), hypoglycemia (low glucose), or hyperglycemia without the osmolar imbalance.