An 16-year-old man presents with polyuria and polydipsia. Which of the following may confirm the diagnosis of diabetes mellitus? 1) A random plasma glucose of >7.5 mmol/L 2) A finding of 3+ ketonuria 3) An HbA1c of 7.0% 4) A fasting plasma glucose of 7.5 mmol/L 5) An abnormal glucose tolerance test

1 Answer

Answer :

Answers-4 The diagnosis is usually relatively easy to confirm in a symptomatic subject. A random glucose of >11.1 mmol/L or a fasting glucose of >7.0 mmol/L would be regarded as confirmatory. There is usually glycosuria in addition to ketonuria. Isolated ketonuria suggests fasting. A raised glycosolated haemoglobin (HbA1c) is also highly suggestive but not diagnostic. A glucose tolerance test is rarely needed.

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