Osmolality urine test

OSMOLALITY URINE TEST

DESCRIPTION – an osmolality test measures the concentration of particles in a solution. In this case, the solution is urine. An osmolality urine test is performed to measure the concentration of particles in urine. Greater than normal results may indicate conditions such as Addison disease, congestive heart failure or shock.

METHODOLOGY – Freezing point

TURN AROUND TIME – within 24 hours

SPECIMEN REQUIERED –

COLLECT – urine

SPECIMEN PREPARATION – transfer 1 ml aliquot from a well-mixed urine to transport tube

STORAGE/TRANSPORT TEMPERATURE – frozen

STABILITY – ambient: 24 hours; refrigerated: 1 week; frozen: 6 months

UNACCEPTABLE CONDITION – urine collected with preservatives

SPECIAL INSTRUCTIONS – clinical history is mandatory