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ModerateEndocrinologyHyperosmolar hyperglycaemic stateuk-plab-1

A 73-year-old woman with long-standing type 2 diabetes presents confused and very drowsy. Blood glucose is 44 mmol/L, serum osmolality is high and ketones are absent. She is clinically dehydrated with blood pressure 90/60 mmHg. What is the most likely diagnosis?

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