Cystatin c test

CYSTATIN C TEST

DESCRIPTION – this test measures the amount of a protein called cystatin C in your blood. Your body makes cystatin C constantly, and the protein is found in different fluids, including blood, spinal fluid and breast milk. When your kidneys are healthy, they filter cystatin C out of the blood so it can be excreted in your urine

METHODOLOGY – quantitative nephelometry

TURN AROUND TIME – within 24 hours

SPECIMEN REQUIERED –

COLLECT – serum separator or plasma separator tube or green (sodium heparin)

SPECIMEN PREPARATION – allow specimen to clot completely at room temperature. Separate the serum or plasma from cells within 2 hours of collection. Transfer 1 ml of serum to transport tube

STORAGE/TRANSPORT TEMPERATURE – refrigerated

STABILITY – refrigerated:1 week; frozen: 3 months

UNACCEPTABLE CONDITION – grossly hemolyzed specimens

SPECIAL INSTRUCTIONS – clinical history is mandatory