Creatinine Clearance without Glomerular Filtration Rate, Estimated (eGFR)
Use
Creatinine Clearance is used to evaluate the glomerular filtration rate (GFR). Clearance is defined as that volume of plasma from which a measured amount of substance could be completely eliminated into the urine per unit of time. Daily creatinine production is fairly constant except when there is massive injury to muscle.
Special Instructions
Record total volume and collection time on specimen container and requisition. Indicate the patient's height and weight on the test requisition. Note: A serum creatinine level must be collected within 24 hours of the beginning or ending of the urine collection.
Limitations
Not provided.
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
10 mL aliquot from a well-mixed 24-hour urine collection
Minimum Volume
0.5 mL urine
Container
Plastic urine container
Collection Instructions
Record total volume and collection time on specimen container and requisition.
Causes for Rejection
Grossly icteric
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Frozen | 28 days |