pH, 24 Hour, Urine
Performing Laboratory
Mayo Clinic Laboratories in RochesterSpecimen Type
UrineNecessary Information
24-Hour volume (in milliliters) is required.
Specimen Required
Supplies:
Diazolidinyl Urea (Germall), 5.0 mL (T822)
Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube or a clean, plastic aliquot container
Specimen Volume: 10 mL
Collection Instructions:
1. Collect urine for 24 hours
2. Add 5 mL of diazolidinyl urea as preservative at start of collection or refrigerate specimen during and after collection.
3. Specimen pH should be between 4.5 and 8 and will stay in this range if kept refrigerated. Specimens with pH >8 indicate bacterial contamination, and testing will be cancelled. Do not attempt to adjust pH as it will adversely affect results.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
Specimen Minimum Volume
1 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Urine | Refrigerated (preferred) | 7 days | |
Frozen | 7 days |
Special Instructions
Reference Values
4.5-8.0
CPT Code Information
83986
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
UPH24 | pH, 24 HR, U | 27378-9 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
PH24 | pH, 24 HR, U | 27378-9 |
TM90 | Collection Duration | 13362-9 |
VL72 | Volume | 3167-4 |
Day(s) Performed
Monday through Sunday