Referred Tests
| Web: | mayocliniclabs.com |
|---|---|
| Email: | mcl@mayo.edu |
| Telephone: | 800-533-1710 |
| International: | +1 855-379-3115 |
| Values are valid only on day of printing. | |
Test ID: URAU
Urea, 24 Hour, Urine
Specimen Type 
Describes the specimen type validated for testing
Necessary Information
24-Hour volume is required.
Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Container/Tube: Plastic, 5-mL tube (T465)
Specimen Volume: 4 mL
Collection Instructions:
1. Add 10 g of boric acid as preservative at start of collection. (If boric acid is not available, refrigerate specimen during collection.)
2. Collect urine for 24 hours.
3. Mix well before taking aliquot.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens in Special Instructions for multiple collections.
Special Instructions Library of PDFs including pertinent information and forms related to the test
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.
Urine Preservative Collection Options
Note: The addition of preservative or application of temperature controls must occur within 4 hours of completion of the collection.
| Ambient | No |
| Refrigerate | OK |
| Frozen | OK |
| 50% Acetic Acid | OK |
| Boric Acid | Preferred |
| Diazolidinyl Urea | OK |
| 6M Hydrochloric Acid | OK |
| 6M Nitric Acid | OK |
| Sodium Carbonate | OK |
| Thymol | OK |
| Toluene | No |
Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory
Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 14 days | |
| Frozen | 14 days |