Ronald Reagan UCLA Medical Center Clinical Laboratory UCLA Outreach Clinical Laboratory - Panorama City (BURL) Santa Monica UCLA Medical Center and Orthopaedic Hospital
Performing Section
Chemistry
Availability
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Daily, 24 hours UCLA Outreach Clinical Laboratory - Panorama City (BURL): Monday through Friday 0600 - 0230, Saturday 1200-2030 (excluding holidays)
Turnaround Time
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Routine: 4 hours from receipt in the laboratory; STAT: 1 hour from receipt in the laboratory UCLA Outreach Clinical Laboratory - Panorama City (BURL): Routine: 24 hours; STAT: 4 hours from receipt in the laboratory
Methodology
Enzymatic assay
Use
Renal function test when used as part of creatinine clearance
Limitations
Drugs interfering with tubular creatinine secretion include cimetidine, trimethoprim, and probenecid. Creatinine reabsorption occurs with very low urine flow rates. Entities in which reabsorption occurs include severe congestive heart failure, uncontrolled diabetes mellitus, and acute renal failure.
Additional Information
Urine creatinine is rarely ordered alone. Creatinine clearance, which involves a serum creatinine, offers better interpretive data.
Specimen Type
Timed urine
Container
24 Hour Urine Container
Collection Instructions
Obtain the collection container from Clinical Lab Support Services at (310) 267-8100 for the 24-hour urine prior to collection. Instruct the patient to void at the beginning of the collection period. Collect all urine, including the final specimen voided at the end of the 24-hour collection period. Refrigerate specimen during collection. Screw the lid on securely. Transport the specimen promptly to the Laboratory. Requisition and container(s) must be labeled with the patient's full name, hospital number, date and time collection started, and date and time collection finished.
Volume
Entire collection
Minimum Volume
5 mL
Shipping and Handling Instructions
Refrigerate
Causes for Rejection
Specimen not refrigerated during collection
Reference Range
Timed urine: 1000-1800 mg/dL Random urine: No reference range
Test Information
CPT Codes
82570
Synonyms
Urine Creatinine
Performing Laboratory / Facility
Ronald Reagan UCLA Medical Center Clinical Laboratory UCLA Outreach Clinical Laboratory - Panorama City (BURL) Santa Monica UCLA Medical Center and Orthopaedic Hospital
Performing Section
Chemistry
Availability
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Daily, 24 hours UCLA Outreach Clinical Laboratory - Panorama City (BURL): Monday through Friday 0600 - 0230, Saturday 1200-2030 (excluding holidays)
Turnaround Time
Ronald Reagan UCLA Medical Center Clinical Laboratory and Santa Monica UCLA Medical Center and Orthopaedic Hospital: Routine: 4 hours from receipt in the laboratory; STAT: 1 hour from receipt in the laboratory UCLA Outreach Clinical Laboratory - Panorama City (BURL): Routine: 24 hours; STAT: 4 hours from receipt in the laboratory
Methodology
Enzymatic assay
Use
Renal function test when used as part of creatinine clearance
Limitations
Drugs interfering with tubular creatinine secretion include cimetidine, trimethoprim, and probenecid. Creatinine reabsorption occurs with very low urine flow rates. Entities in which reabsorption occurs include severe congestive heart failure, uncontrolled diabetes mellitus, and acute renal failure.
Additional Information
Urine creatinine is rarely ordered alone. Creatinine clearance, which involves a serum creatinine, offers better interpretive data.
Specimen Collection and Handling
Specimen Type
Timed urine
Container
24 Hour Urine Container
Collection Instructions
Obtain the collection container from Clinical Lab Support Services at (310) 267-8100 for the 24-hour urine prior to collection. Instruct the patient to void at the beginning of the collection period. Collect all urine, including the final specimen voided at the end of the 24-hour collection period. Refrigerate specimen during collection. Screw the lid on securely. Transport the specimen promptly to the Laboratory. Requisition and container(s) must be labeled with the patient's full name, hospital number, date and time collection started, and date and time collection finished.
Volume
Entire collection
Minimum Volume
5 mL
Shipping and Handling Instructions
Refrigerate
Causes for Rejection
Specimen not refrigerated during collection
Result Interpretation
Reference Range
Timed urine: 1000-1800 mg/dL Random urine: No reference range
