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HelpTest Code 24H UR CREAT CLEAR Creatinine Clearance
Performing Laboratory
NRL-Chemistry
Methodology
Jaffe
Includes creatinine, plasma; creatinine, urine; a calculated
clearance; and a calculated creatinine/24 hours.
Specimen Requirements
Plasma and urine are required.
Plasma should be drawn midway into timed urine collection. Recommended interval for urine collection is 12 hours or 24 hours.
Specimen Type: Plasma
Container/Tube: Mint-green top (lithium heparin)
Specimen Volume: 2 mL
Collection Instructions:
1. Avoid hemolysis.
2. Label specimen as plasma.
Specimen Type: Urine, 12-, 24- hour
Container/Tube: Plastic urine container
Specimen Volume: Entire collection
Collection Instructions: No preservative.
Refrigerate specimen during collection.
Additional Information:
1. Starting and ending times and duration of
collection are required.
2. Follow instructions in Urine Collection in Special
Instructions.
Reference Values
CREATININE, PLASMA
Males
≥20 yrs: 0.70-1.40 mg/dL
4yrs-20 yrs: 0.20-1.20 mg/dL
0-4 yrs: 0.10-0.50 mg/dL
Females
≥20 yrs: 0.60-1.30 mg/dL
4-19 yrs: 0.20-1.20 mg/dL
0-3 yrs: 0.10-0.50 mg/dL
CREATININE, URINE
Males: 0.80-2.00 g/24 hours
Females: 0.60-1.80 g/24 hours
CREATININE CLEARANCE
60-130 mL/min
Note: Results are calculated using total volume and length of collection and results are adjusted to units/24 hours.
Day(s) Test Set Up
Monday through Sunday
Turnaround Time:
Routine-daily
Specimen Transport Temperature
Refrigerate
Test Classification and CPT Coding
81050-Urine timed measurement
82575-Creatinine clearance