Wednesday, April 29, 2009
19 - Osmolality clinical uses
Serum osmolality is used in two main circumstances: investigation of hyponatraemia and identification of an osmolar gap. Urine osmolality is an important test of renal concentrating ability, for identifying disorders of the ADH mechanism, and identifying causes of hyper-or hyponatraemia. Faecal osmolality can be used to assist with diagnosis of the cause of diarrhoea.