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TEST ID U24CRCl CREATININE CLEARANCE

Important Note

 Both serum and 24 hour urine specimen required.

Patient height and weight are required.

Factors interfering with accuracy of 24hr urine collection:

  • Failure to collect all urine excreted during the 24 hr time frame.
  • Going beyond the 24 hr collection period and collecting excess urine.
  • Losing urine from specimen container through spilling.
  • Failure to keep urine cold during collection period.

Performing Laboratory

NRLS-Core Chemistry

Specimen Type

Urine, 24 Hour

Specimen Required

Container/Tube:
Preferred: 24 hour urine container, no preservative.
Specimen Volume: Entire collection

Collection Instructions:

To start the 24-hour collection, the patient voids, discards specimen, and notes the date and time on label. *Note: 24 hour urine tests must begin on an empty bladder. All urine for the following 24-hour period is added to the container. Urine must be kept on ice or in a refrigerator.

 Exactly 24 hours from the start time, the patient voids again, adding the specimen to the container, and the date and time is recorded as the end of collection.

Specimen Minimum Volume

Entire Collection

Specimen Stability Information

Specimen Type

Temperature

Time
Urine- 24 hour Refrigerated(preferred) 48 hours
  Ambient Not Acceptable
  Frozen Not Acceptable

 

Profile Information

Reporting Name

 Always Performed
CREATININE, BLOOD Yes
CREATININE, URINE Yes
CREATININE, URINE 24 HR Yes
CREATININE CLEARANCE 24 HR Yes
TOTAL VOLUME Yes
TOTAL DURATION Yes
HEIGHT/  WEIGHT PATIENT Yes

Reference Values

An interpretive report will be provided

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 day

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