Osmolality (Urine)

Pathology category

Biochemistry

Code

UO

Referral code

Request form

Test information

Used in conjunction with serum Osmolality for assessment of fluid load/balance. Also used as marker of adequate renal concentrating capacity, in Water Deprivation Test

NOTE: If required for water deprivation test, please request as WDEP and inform the lab 24h prior to test so they can be processed urgently

Guidelines

Pre-analytical

NOTE: If required for water deprivation test, please request as WDEP and inform the lab 24h prior to test so they can be processed urgently

Reference range

No actual range, use in conjunction with serum levels.

Tube type

Tube type info

Urine Monovette (Yellow top)

Special requirements

Minimum volume

2 ml

Assay frequency

TAT Inpatient (urgent)

TAT Inpatient

4 hrs

TAT GP/Outpatient

48 hrs

Referral lab

Local, Clinical Biochemistry