Cystatin C-14224

Test info

  
Cystatin C
  
14224
  
LAB14224
  
CTSTATINC
  

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.

Specimen

  
Serum
  
  
1.0 mL
  
0.5 mL
  

Immediately following collection, thoroughly mix sample by gently inverting 5 times

  
  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin within two (2) hours of sample collection
  

Gold serum separator (SST) tube

  
Heparin plama
  

Red serum vial/tube, 5 mL

Dk green heparin (Li or Na), no gel

 

  

Dk green:

Immediately following collection, mix sample thoroughly by gently inverting 8 - 10, times to prevent clotting

  

Red:

  1.  Allow sample to clot
  2. Spin
  3. Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum, within two (2) hours of sample collection
 

Dk green:

  1. Spin
  2. Transfer plasma to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as the appropriate plasma type, within two (2) hours of sample collection
  
  

Ambient (preferred) - 14 days

Refrigerated - 14 days

Frozen - 14 days

Freeze/thaw cycles - stable x 3

  
  • Specimens other than serum or heparinized plasma
  • Gross hemolysis (>1,000 mg/dL Hgb)
  • Excessive turbidity
  • Clots in samples

Performance

  
LabCorp Burlington (121251): R-LC
  
Mo - Fr
  
2 - 5 days
  

Immunologic

Clinical and Interpretive info

  

Cystatin C: 0.62 - 1.16 mg/L

Billing

  
82610
  
Result 33863-2

Tracking

  
05/30/2019
  
08/20/2021
  
02/19/2021