investigations

Last reviewed 01/2018

These include:

• urinary sugar
• serum calcium
• 24 hour urine volume
• MSU
• urine and plasma osmolarity:
• a relatively concentrated urine suggests an osmotic diuresis e.g. diabetes mellitus
• a relatively dilute urine suggests lack of ADH action e.g. diabetes insipidus
• a urine osmolarity within 50 mmol/Kg of that of plasma suggests chronic renal failure
• water deprivation test