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Test Code LAB818 Creatinine Clearance

Additional Codes

CREAT CLEAR

Includes:

Serum Creatinine, Creatinine U, Creatinine Urine 24 Hour and Creatinine Clearance

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:

 

Creatinine U:  No established reference range.

 

Creatinine U 24 Hour:  0.80 - 2.80 G/24 Hour

 

Creatinine Clearance:

Female:  80.00 - 125.00 mL/min/1.73 sq.m

Male:  90.00 - 130.00 mL/min/1.73 sq.m

Interpretive Data:

Corrected to standard body surface area.

Performing Laboratory Section

Chemistry / UMC MAIN LABORATORY