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HelpTest Code LAB5382 Creatinine - Serum or Plasma
Performing Laboratory
Asante Rogue Regional Medical Center / Asante Three Rivers Medical Center / Ashland Community Hospital / Asante White City Laboratory
Specimen Minimum Volume
0.5 ml
Billing Code
2050474
Methodology
Kinetic Jaffe Reaction; IDMS standardized
Day(s) Test Set Up
Monday through Sunday
Routine – same day
ASAP – 2 hours after receipt of specimen in lab
STAT – 1 hour after receipt of specimen in lab
Test Classification and CPT Coding
82565 - Creatinine; blood
Additional Information
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.
Specimen Transport Temperature and 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.
Performing Department
Chemistry
Reasons for Rejection
Hemolysis
Quantity not sufficient (QNS)
Lack of Two Patient Identifiers:
1-Patient's First & Last name
2-Patient's Date of Birth