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HelpTest Code LAB818 Creatinine Clearance
Additional Codes
CREAT CLEAR
Includes:
Serum Creatinine, Creatinine U and Creatinine Urine 24 Hour
Notes:
Specimen label and request must state the date/time the collection started & ended. Request must state patient's height in centimeters and weight in kilograms. Serum collected within 72 hours is required with 24 hour urine sample.
Collection:
Specimen: Blood and Timed Urine Collection
Container:
Blood – Green Lithium Heparin with gel (preferred), Serum Separator or Plain Red
Urine – Plain urine jug with no preservative. Refrigerate urine during collection.
Volume:
Blood – 5 mL; Minimum 1 mL
Urine – entire timed collection
Stability:
Send specimens to Lab within 4 hours of collection completion.
Urine:
Refrigerated (preferred): 1 Week
Frozen: 2 Weeks
Once serum/plasma is separated from cells:
Ambient: 8 Hours
Refrigerated (preferred): 1 Week
Frozen: 2 Weeks
Turn Around Time (TAT):
STAT: 1 HOUR
Routine: 4 HOURS
Test Availability:
24 hours a day / 7 days a week
Reference Interval:
Serum Creatinine:
| Age | Female | Male |
|---|---|---|
| < 14 days | 0.4 - 1.1 mg/dL | 0.4 - 1.1 mg/dL |
| 14 days - < 1 year | 0.3 - 0.5 mg/dL | 0.3 - 0.5 mg/dL |
| 1 year - < 4 years | 0.4 - 0.5 mg/dL | 0.4 - 0.5 mg/dL |
| 4 years - < 7 years | 0.4 - 0.6 mg/dL | 0.4 - 0.6 mg/dL |
| 7 years - < 12 years | 0.5 - 0.7 mg/dL | 0.5 - 0.7 mg/dL |
| 12 years - < 15 years | 0.6 - 0.8 mg/dL | 0.6 - 0.8 mg/dL |
| 15 years - < 19 years | 0.6 - 0.9 mg/dL | 0.7 - 1.1 mg/dL |
| > 19 years | 0.6 - 1.1 mg/dL | 0.7 - 1.3 mg/dL |
Creatinine U: No established reference range.
Creatinine U 24 Hour: 0.80 - 2.80 G/24 Hour
Interpretive Data:
Corrected to standard body surface area.
Performing Laboratory Section
Chemistry / UMC MAIN LABORATORY