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Test Code LAB5382 Creatinine - Serum or Plasma

Useful For

A renal function test, providing an index of glomerular filtration.  Causes of high creatinine include:  renal disease and insufficiency with decreased glomerular filtration (uremia if severe); urinary tract obstruction; reduced renal blood flow including congestive heart failure, shock and dehydration.  Rhabdomyolysis causes high serum creatinine.  Causes of low creatinine include debilitation, decreased muscle mass. 

Limitations:  Certain cephalosporins, especially cefoxitin, cause misleading (high) results.

 

NOTE: An estimate of glomeular filtration, using the 4 parameter MDFD equation (eGFR) is provided with each adult creatinine result.

Performing Laboratory

Asante Rogue Regional Medical Center / Asante Three Rivers Medical Center / Ashland Community Hospital / Asante White City Laboratory

 

Performing Department

Chemistry

Specimen Required

(submit one of the following tube types)

Yellow (Gold) top tube (SST)  -Outpatient clients MUST draw SST

Lithium Heparin Green top tube

Plain Red top tube  

Green microtainer

 

Specimen Minimum Volume

0.5 ml

Neonatal minimum volume: 0.4 mL whole blood

Specimen Stability

Serum or plasma should be centrifuged and separated from cells by either aliquoting or use of a gel separator tube within 2 hours of collection.

 

Serum or plasma is stable 7 days at 2-8° Celsius.

 

Urine stable for 2 days at room temperature at 20-25° Celsius or 6 days refrigerated at 2-8° Celsius.

Reject Due To

  • Hemolysis
  • Quantity not sufficient (QNS)
  • Lack of Two Patient Identifiers:
    • 1-Patient's First & Last name 
    • 2-Patient's Date of Birth

Day(s) Performed

Monday through Sunday

Turnaround time:

Routine – 4 hour after receipt of specimen in lab

STAT - 1 hour after receipt of specimen in lab

Method Name

Kinetic Jaffe Reaction; IDMS standardized

CPT Code Information

82565  -  Creatinine; blood 

Billing Code

2050474