Test Directory
| Test Code | ||
| CALUN | ||
| Test Name | ||
| Urea Nitrogen Clearance, 24UR | ||
| CPT Codes | ||
| 84545 | ||
| Included Tests | ||
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| Expected Turnaround Time | ||
| 1 day | ||
| Clinical Utility | ||
| Used in the evaluation of renal function. | ||
| Specimen and Container Info | ||
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Specimen Type: Serum and 24-Hour Urine Collection Containers: Gold Top, Serum Separator and 24-Hour Plastic Urine Container
Minimum Acceptable Volume: 0.4 mL Volume reflects estimated whole blood. 0.7 mL 24-Hour Urine Note: This volume does not allow for repeat testing. |
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| Collection Instructions | ||
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Urine should be collected in a 24-Hour plastic urine container with no preservative. See Special Instructions: |
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| Processing and Submission Instructions | ||
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Urine should be well mixed before aliquoting. Separator tubes: Contains clot activator and gel for separating serum from cells, but not anticoagulant. Separate serum from cells as soon as the clot has formed (30 minutes). If specimen is centrifuged before clotting is complete, a fibrin clot will form on top of the cell. This may cause the gel barrier to not be intact and could cause improper separation of serum and cells, possibly affecting test results. |
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| Transport Instructions | ||
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Transport to the laboratory refrigerated. |
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| Stability Requirements | ||
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| Methodology | ||
| See Individual Test Listings | ||
| Reference Intervals | ||
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See individual test listings |
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| Performing Location | ||
| Roble Road Core Laboratory | ||
| Testing Schedule | ||
| Routine, daily | ||
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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