Specimen Requirements
Title
Cystatin C with eGFR
Specimen Requirement
Overnight fasting is preferred.
Collect SST/1.0 mL serum, after 30 minutes of clotting, promptly centrifuge and send.
Methodology
Particle Enhanced Turbidimetric Immunoassay (PETIA)
Stability
Room temp: 26 days, Refrigerated: 26 days, Frozen: 10 Years
Reference Range
By Report*
Turnaround
2-4 days, Set up Monday, Wednesday and Friday
Clinical Use
Since it is formed at a constant rate and freely filtered by the healthy kidney, cystatin C is a good marker of renal function. Serum concentrations of cystatin C are almost totally dependent on glomerular filtration rate (GFR). A reduction in GFR causes a rise in the concentration of cystatin C.
Can be used as a confirmatory test for the diagnosis of chronic kidney disease (CKD) in patients with a decreased GFR as estimated from creatinine.
Test Code
CYSC