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HelpTest Code LAB1765 Creatinine Clearance
Performing Laboratory
Asante Rogue Regional Medical Center / Asante Three Rivers Medical Center
Specimen Minimum Volume
Serum: 0.5 mL
Urine: 1.0 mL
Billing Code
2050490
Methodology
Kinetic Jaffe Reaction
Specimen Requirements
Required: Blood and 24 hour urine
24 Hour Urine Container Instructions
24 Hour Urine Container with no preservatives
and
Yellow (Gold) top tube (SST) or
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
82575 - Creatinine; clearance
82565 - Creatinine; blood
Additional Information
A measure of glomerular filtration rate of the kidney. This is a 24 hour clearance test. Creatinine clearance is
calculated on the basis of the surface area of the patient. Exercise may cause increased creatinine clearance. The glomerular filtration rate is substantially increased in pregnancy.
The National Kidney Disease Foundation (NKDF) reports the estimated glomerular filtration rate (eGFR), calculated with each adult serum or plasma creatinine, is superior to Creatinine Clearance in most patients other than those patients with an extremely large body or muscle mass.
Specimen Transport Temperature and Stability
Blood and 24 hour urine
24 hour urine container with no preservative
Container MUST be labeled with: Office Location, Patient’s First and Last Name and Date of Birth
Instruct patient: To label container with Date and time collection started, Date and time collection finished.
Void and DISCARD the first-morning specimen and to record exact time of voiding.
Patient should collect all subsequent voided urine for remainder of day and night.
Collect first-morning specimen on day 2 at same time as noted on day 1. Collection is complete.
Keep urine refrigerated during entire collection. Screw lid on securely.
Patient’s height and weight MUST be noted.
Blood MUST be collected sometime during the 24-hour collection period, either 24 hours prior to the
start of the urine collection or 24 hours after the urine collection.
Send the blood sample and the entire 24 hour urine container to the laboratory immediately.
Spin and refrigerate 1 mL of serum. Transport serum and 24-hour urine to the laboratory immediately.
Performing Department
Chemistry
Reasons for Rejection
Lipemia
Hemolysis
Lacking collection date
Lacking collection beginning and ending times
Lacking Patients Height and Weight
Lack of Two Patient Identifiers:
1-Patient's First & Last name
2-Patient's Date of Birth