Test Code CRCL.1 CREATININE CLEARANCE, URINE
Methodology
Two-point Rate
Useful as 1 of the most sensitive tests for measuring the glomerular filtration rate.
Specimen Requirements
Submit only 1 of the following blood specimens:
Preferred:
Serum
Serum Gel Tube
Container/Tube: Serum gel tube(s)
Specimen Volume: 1 mL (minimum volume: 0.5 mL) of
serum
Collection Instructions: Spin down within 4 hours of draw.
Note: Label specimen appropriately (serum).
Alternate:
Serum
Plain, Red-Top Tube
Container/Tube:
Plain, red-top tube(s)
Specimen Volume: 1 mL (minimum volume: 0.5 mL) of
serum
Collection Instructions: Spin down within 4 hours of draw.
Note: Label specimen appropriately (serum).
Plasma
Container/Tube: Green-top (lithium heparin) tube(s)
Specimen Volume: 1 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Spin down within 4 hours of draw.
Note: Label specimen appropriately (plasma).
Urine
Container/Tube: Plastic urine container
Specimen Volume: 10 mL from a well-mixed, 24-hour urine collection
Collection Instructions: No preservative. Refrigerate specimen during collection.
Note:
- Patient’s height and weight, starting and ending times of collection, and total volume are required.
- Follow instructions in “Urine Collection, 24-Hour” in Special Instructions.
- Label specimen appropriately (urine).
Day(s) Test Set Up
Monday through Sunday
Reference Values
71-182 mL/minute
Performing Laboratory
Logan Health Medical Center-Chemistry
Test Classification and CPT Coding
82575
Specimen Transport Temperature
Refrigerate