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Test Code POU Phosphorus, 24 Hour, Urine

Reporting Name

Phosphorus, U

Useful For

Evaluation of hypo- or hyper-phosphatemic states

 

Evaluation of patients with nephrolithiasis

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Urine


Necessary Information


24-Hour volume is required.



Specimen Required


Container/Tube: Plastic, 5-mL tube (T465)

Specimen Volume: 4 mL

Collection Instructions:

1. Collect urine for 24 hours.

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

Additional Information: 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 Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  7 days

Reference Values

<1,100 mg/24 hours  

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

Test Classification

This test has been cleared or approved by the U.S. 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

84105

LOINC Code Information

Test ID Test Order Name Order LOINC Value
POU Phosphorus, U 2779-7

 

Result ID Test Result Name Result LOINC Value
POUU Phosphorus, U 2779-7
TM12 Collection Duration 13362-9
VL10 Urine Volume 3167-4
PHOCN P Concentration 21458-5

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Method Name

Molybdic Acid

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

Yes

Refrigerate

Preferred

Frozen

Yes

50% Acetic Acid

Yes

Boric Acid

Yes

Diazolidinyl Urea

Yes

6M Hydrochloric Acid

Yes

6M Nitric Acid

Yes

Sodium Carbonate

No

Thymol

Yes

Toluene

No

Forms

If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.