Pathology Handbook

Urine Creatinine (24 hours)

Clinical Indications

Used to assess the completeness of a 24 hour urine collection. 24 hour Urine Creatinine is also part of a measured creatinine clearance, along with a serum creatinine collected in the same 24 hour period. This is only available in selected cases such as tertiary referral request, transplant donor work-up and some chemotherapy regimes. It has been replaced by the eGFR test.

Test Includes

Free epinephrine (adrenaline), Free norepinephrine (nor-adrenaline)

Request Form

Request on ICE as Creatinine Clearance Test or 24hr Urine Electrolytes

Availability

Daily

Specific Criteria

None

Patient Preparation

None

Turnaround Time

3 working days

Specimen

24 hour urine collection into plain bottle

Volume

24 hour collection

Container

Urine containers 24 hour

Collection

Transport to laboratory on day of collection

Causes for Rejection

Contaminated sample; unlabelled or incorrectly labelled sample;obvious under/over collection

Reference Range and interpretation

See laboratory report