Test Name

Urea, 24-hour Urine

Test Code

264

Unit

g/24hr

Station

Chemistry

CPT Code

84540

Performing Facility

American Medical Labs, Herzliya
Pituah

Analyzer

Roche cobas 6000

Test Method

Enzymatic- kinetic UV

AML Preferred Tube

24 Hour Urine Collection. No
additives

Storage Instruction

Refrigerated

Stability:

2 days at 15 to 25 ^oC

7 days at 2 to 8^oC

 4 weeks at -15
to -25^oC

Min. Volume

1 mL of well mixed urine from measured 24 hour
collection.

Turn-Around-Time

One day

Limitations

Measuring range: 6 – 12000 mg/dL

Intended Use

Renal function test

Patient Preparation

Instruct the patient to void at 8 AM and discard the
specimen. Then collect all urine including the final specimen voided at
the end of the 24-hour collection period (i.e. 8 AM the next
morning).

Reasons for Rejection

Collection times not indicated; improper labeling; use of
preservatives

Adult Reference Ranges

10 to 35 g Urea/24
h