A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
UREA NITROGEN, URINE, 24 HOUR
Test CodeUNUN
CPT Codes
84540
Preferred Specimen
24 Hour Urine Container without preservative
(aliquot or transfer urine into a transfer tube and note the total volume)
(aliquot or transfer urine into a transfer tube and note the total volume)
Minimum Volume
1 mL aliquot
Instructions
- Mix the specimen well and measure the 24-Hour volume (RECORD THE TOTAL VOLUME)
- Pour off 20 mL of urine into a separate plastic screw-cap container
- Refrigerate if not tested immediately
Transport Temperature
Refrigerate
Specimen Stability
- 2-8°C up to 5 days
Methodology
Colorimetric
Setup Schedule
M, T, W, Th, F, Sa, Sun
Report Available
Same day tested at the performing laboratory.
Clinical Significance
Used in the diagnosis of certain renal and metabolic diseases
Performed By
Alverno Laboratories
Performing Laboratory
Alverno Central Lab
NCHB1 (Chemistry, Beckman AU)
Additional Information
24 Hour Urine Collection
Last Updated: July 5, 2023