UR Creatinine Clearance 24 Hour
Test Code
CRCLR
Description
Creatinine Clearance - 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.
Collect
Plain red or gel barrier [SST] tube PLUS a 24 hour urine sample is required for this assay.
Pediatric Collection
Minimum volume: 100 mcL serum AND 100 mcL aliquot of urine from a well-mixed 24 hour collection
Storage Transport Temp
Offsite: Send frozen serum and urine Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
8 hours at room temperature.
24 hours refrigerated at 2-8°C
>24 hours frozen at -20°C
Notes
Plain red or gel barrier tube AND a 24 hour urine sample is required for this assay.
Blood sample must be drawn within 3 days of collection of urine.
Performed
Monday - Friday
Methodology
Modified Rate Jaffe
Turnaround Time
4 hours
Department
Core Lab
Synonyms
Jaffe (Creatinine Clearance, Urine and Serum);CRCLX
Study Offerings
Not offered
Reference Interval
All: 70-130 mL/min
CPT Code
82575
New York Approved
FDA Approved or Cleared
FDA
Approved or Cleared