ALDR – “Aldosterone/Direct Renin Ratio”

Update to specimen preparation and rejection criteria

Specimen Preparation: Direct Renin: Do not prechill collection tubes. Centrifuge, separate plasma from cells immediately and send 1.5 mL plasma frozen in a screw capped plastic vial. CRITICAL FROZEN.

Rejection Criteria: Direct Renin: Hemolysis, gross lipemia, nonfrozen plasma, serum, plasma from dark blue EDTA collection tubes, incorrect sample type identification.