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Test Code MISCLM pH, 24 Hour, Urine

Additional Codes

 

MAYO Test ID

UPH24

EPIC Test ID

2608

 

Reporting Name

pH, Urine 24 Hour

Useful 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)

Method Name

pH Meter

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Urine


Specimen Required


Container/Tube: Plastic, 10-mL urine tube (T068) or a clean, plastic aliquot container

Specimen Volume: 10 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. No preservative.

3. Refrigerate specimen within 4 hours of completion of 24-hour collection.

Additional Information:

1. 24-Hour volume is required.

2. See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens in Special Instructions for multiple collections.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 7 days
  Frozen  7 days

Reject Due To

Hemolysis

NA

Lipemia

NA

Icterus

NA

Other

NA

Reference Values

4.5-8.0

Day(s) and Time(s) Performed

Monday through Saturday; 6:30 a.m.-5 p.m.

CPT Code Information

83986

LOINC Code Information

Test ID Test Order Name Order LOINC Value
UPH24 pH, Urine 24 Hour In Process

 

Result ID Test Result Name Result LOINC Value
PH24 pH, Urine 24 Hour 27378-9
TM90 Collection Duration 13362-9
VL72 Volume 3167-4

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.

Analytic Time

2 days

Urine Preservative Collection Options

Ambient

No

Refrigerated

Yes

Frozen

Yes

6N HCl

No

50% Acetic Acid

No

Na2CO3

No

Toluene

Preferred

6N HNO3

No

Boric Acid

No

Thymol

Yes