Cystatin C eGFR


Sunquest Code:CYSGFR  
Epic Code:LAB3417Epic Name:Cystatin C with GFR
Synonyms:Cystatin C; Cystatin-C with CKD-EPI Calculation; Glomerular Filtration Rate, GFR
Methodology:Rate nephelometry
Turnaround Time:Specimens are sent to the reference laboratory Mon-Sat; results are reported within 1-3 days.


Collection Instructions

Specimen:Blood
Optimal Volume:2 mL
Minimum\Peds Volume:1 mL
Container:Red or gold (gel) (Green (lithium heparin, gel), Green (sodium heparin, no gel), Red (no gel))
Causes for Rejection:Grossly hemolyzed specimens.


Processing and Shipping

Specimen Processing:Allow specimen to clot completely at room temperature. Within 2 hours or ASAP, centrifuge and aliquot 1 mL, 0.4 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:95229


Interpretive

Reference Range:Cystatin C: 0.5 - 1.2 mg/L

eGFR by Cystatin C:
17 years or less -calculation not reported
  • Normal or increased eGFR: 90 or greater
  • Mildly decreased eGFR: 60-89
  • Moderately decreased eGFR: 30-59
  • Severely decreased eGFR: 15-29
  • Kidney Failure: Less than 15
 
Use:For evaluation of glomerular filtration rate.


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