32240:CREATININE CLEARANCE
Author PeaceHealth Laboratories
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| Methodology: |
Colorimetry/ Alkaline Picrate |
| Edit Date: |
2/13/2009 |
| Performed: |
Daily |
| Released: |
Same day as tested |
| CPT Code: |
82575 |
| Specimen Collection Details |
| Collection: |
Two specimens required. SERUM: One 7.5 mL serum separator tube (SST) for the serum creatinine. NOTE: The serum specimen must be obtained within 24 hours of the start or stop time of the urine collection. URINE: 24-hour collection preferred, or a minimum 4-hour collection is accepted. Refrigerate during collection, handling, and transport. Do not add preservatives. Note time collection started and stopped, and the patient’s height and weight on the requisition. |
| Handling: |
Centrifuge SST and transport in original tube. Send complete urine collection in original container. Patient’s height and weight information MUST be sent with specimens. A 25 mL aliquot of the urine may be submitted by following this protocol: Mix the entire urine collection well, measure and record the total volume. Pour aliquot of urine into sterile container. |
| Standard Volume: |
Total urine collection or 25 mL aliquot, AND 2 mL serum. |
| Minimum Volume: |
5 mL urine AND 0.5 mL serum. |
| Transport: |
Refrigerated. |
| Rejection Criteria: |
Incomplete urine collection; specimen not refrigerated. |
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| Results vary for age and sex. See individual components. |