Test ID: PHU_ pH, Random, Urine
Reporting Name
pH, UUseful For
Assessment of patients with metabolic acidosis
Assessment of crystalluria
Monitoring the effectiveness of alkalinization or acidification of urine for certain medical conditions (eg, treatment of uric acid nephrolithiasis)
Clinical Information
Urine pH is a measure of the acidity/alkalinity of urine, and by itself usually provides little useful information. Under normal conditions its value is influenced by the type of diet (some diets: eg, diets rich in meat-having more acid content than others; eg, vegetarian diets). Assessment of urine pH may be useful in the evaluation of systemic acid-base disorder. For example, the normal response during metabolic acidosis is a lowering of the urine pH to less than 5. If it is >5, then a defect in urine acidification should be considered. Often a urine pH above 7 is suggestive of infection of a urea splitting organism such as proteus mirabilis. Monitoring of urine pH may also be helpful during therapeutic interventions to either alkalinize the urine (such as for treatment of uric acid nephrolithiasis) or acidify the urine. Finally, when assessing crystalluria, noting the urine pH may be helpful since some crystals have a propensity to form in alkaline urine while others form in relative acidic urine.
Interpretation
Dependent on clinical condition.
Analytic Time
1 dayDay(s) and Time(s) Performed
Monday through Sunday; Continuously
Method Name
pH meter
Specimen Type
UrineSpecimen Required
Container/Tube: Plastic, 10-mL urine tube (T068)
Specimen Volume: 10 mL
Collections Instructions: Collect a random urine specimen.
Specimen Minimum Volume
1 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Urine | Refrigerated (preferred) | 7 days | |
Frozen | 7 days |
Reference Values
N/A
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.CPT Code Information
83986
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
PHU_ | pH, U | 2756-5 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
PHU_ | pH, U | 2756-5 |
mml-diabetes-metabolic-nutrition