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HelpOrder Code LABPTU Protein, Total, 24 Hour, Urine
Additional Codes
Mayo Test Code: PTU
EPIC Test Code: LABPTU
Reporting Name
Protein, Total, 24 HR, UUseful For
Evaluation of kidney disease using a 24-hour urine collection
Screening for monoclonal gammopathy
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. Specimens should be collected before fluorescein is given or not collected until at least 24 hour later.
2. No preservative.
3. Invert well before taking 4-mL aliquot.
4. Do not over fill aliquot tube 4 mL at most.
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 | 24 hours |
Special Instructions
Reference Values
≥18 years: <229 mg/24 hours
Reference values have not been established for patients <18 years of age.
Reference value applies to 24-hour collection.
CPT Code Information
84156
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PTU | Protein, Total, 24 HR, U | 2889-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| TP2 | Total Protein, 24 HR, U | 2889-4 |
| TM23 | Collection Duration | 13362-9 |
| VL21 | Urine Volume | 19153-6 |
Method Description
The sample is preincubated in an alkaline solution containing EDTA, which denatures the protein and eliminates interference from magnesium ions. Benzethonium chloride is then added, producing turbidity.(Package insert: Total Protein Urine/CSF Gen.3. Roche Diagnostics; V13.0 11/2018)
Reject Due To
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Method Name
Turbidimetry
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Kidney Transplant Test Request
-Renal Diagnostics Test Request (T830)
Day(s) Performed
Monday through Sunday