Specimen Requirements

Title

Cystatin C, Serum

Specimen Requirement

Collect SST/1 mL serum. After 30 minutes of clotting, promptly centrifuge and send refrigerated.

Methodology

Quantitative Nephelometry

Stability

Room temp: Unacceptable, Refrigerated: 7 days, Frozen: 3 months

Reference Range

By Report*

Turnaround

1-3 days Performed Sunday-Thursday

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.

Test Code

CYSCS