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HelpTest Code UPHB pH, Body Fluid
Ordering Guidance
To measure pH of a urine specimen, order PHU_ / pH, Random, Urine.
Necessary Information
1. Date and time of collection.
2. Specimen source
-Identify source name from the following list with location (if appropriate):
-Peritoneal fluid (peritoneal, abdominal, ascites, paracentesis)
-Drain fluid (drainage, JP drain)
-Synovial fluid
-Write in source name with source location (if appropriate)
Specimen Required
Supplies: Metal Free Specimen Vial (T173)
Container/Tube: Metal-free container
Specimen Volume: 5 mL
Useful For
Indicating the presence of infections or fistulas
Verifying the effectiveness of treatment to reduce stomach pH
Diagnosing disease states characterized by abnormal stomach acidity
This test is not appropriate for measurement of pleural fluid pH, as that measurement should be made using a blood gas analyzer locally due to sample stability and transport requirements.
Method Name
pH Meter
Reporting Name
pH, BFSpecimen Type
Body FluidSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Body Fluid | Refrigerated (preferred) | 7 days | |
| Frozen | 7 days | ||
| Ambient | 24 hours |
Reject Due To
| Spinal fluid Chest (thoracic) fluid Thoracentesis Pleural fluid Urine |
Reject |
Reference Values
An interpretive report will be provided.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
83986
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| UPHB | pH, BF | 2748-2 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| U_PHB | pH, BF | 2748-2 |
| SRC18 | Source | 14725-6 |
Day(s) Performed
Monday through Sunday