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EasyEndocrinologyHyperosmolar hyperglycaemic stateuk-plab-1

A 79-year-old woman with type 2 diabetes on Metformin is found on ward round to be drowsy and severely dehydrated. Capillary glucose is 38 mmol/L, serum osmolality is raised and blood ketones are 0.6 mmol/L. Arterial pH is 7.35. What is the most likely diagnosis?

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