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HelpOrder Code LABPOUM Phosphorus, 24 Hour, Urine
Additional Codes
Mayo Test Code: POU
Reporting Name
Phosphorus, 24 HR, UUseful For
Evaluation of hypo- or hyper-phosphatemic states
Evaluation of patients with nephrolithiasis
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineNecessary Information
24-Hour volume (in milliliters) is required.
Specimen Required
Supplies: Sarstedt 5 mL Aliquot Tube (T914)
Collection Container/Tube: 24-Hour graduated urine container with no metal cap or glued insert
Submission Container/Tube: Plastic, 5 mL tube or a clean, plastic aliquot container with no metal cap or glued insert
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 for multiple collections.
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 30 days | |
| Ambient | 7 days |
Special Instructions
Reference Values
≥18 years: 226-1,797 mg/24 hours
Reference values have not been established for patients who are less than 18 years of age.
CPT Code Information
84105
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| POU | Phosphorus, 24 HR, U | 2779-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| POUU | Phosphorus, 24 HR, U | 2779-7 |
| TM12 | Collection Duration | 13362-9 |
| VL10 | Urine Volume | 3167-4 |
Method Description
Inorganic phosphorus reacts with ammonium molydbdate in an acidic solution to form ammonium phosphomolybdate. The ammonium phosphomolybdate is quantified in the ultraviolet range (340 nm).(Package insert: Roche Phosphorus. Roche Diagnostics; V9.0 12/2019)
Reject Due To
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Method Name
Molybdic Acid
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.
Day(s) Performed
Monday through Sunday