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Renin Activity, Plasma
MessageThe patient's posture at the time of collection should be noted (see Patient Preparation).
Test Code
002006
Alias/See Also
Plasma Renin Activity (PRA); PRA
CPT Codes
84244
Preferred Specimen
Plasma, FROZEN
Minimum Volume
2 mL (NOTE:This volume does NOT allow for repeat testing.)
Instructions
Draw blood into an EDTA tube. Keep tube at room temperature. Centrifuge at room temperature.[1] Transfer the plasma into a LabCorp PP transpak frozen purple tube with screw cap (LabCorp ID 49482). Freeze immediately and maintain frozen until tested. IT IS CRITICAL THAT THE PLASMA BE TRANSFERRED AND FROZEN AS QUICKLY AS POSSIBLE TO PREVENT CRYOACTIVATION OF PROTEIN TO RENIN (WHICH RESULTS IN FALSELY ELEVATED RENIN LEVELS). To avoid delays in turnaround time when requesting multiple tests on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED.
Transport Container
Lavender-top (EDTA) tube
Transport Temperature
FREEZE
Specimen Stability
14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis; serum or heparinized plasma specimen; specimen not received frozen; recently administered isotopes
Methodology
Radioimmunoassay (RIA)
Setup Schedule
Daily 1st shift
