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HelpTest Code LAB13310 Aldosterone/Direct Renin Ratio
Department
Send Outs
Reference Lab Test Number
ALDR
Refer To
Primary Collection Container
1 – Gold (SST)
2 – Lavender 4 mL (K3EDTA)
Alternate Collection Container
Aldosterone Serum: Red (No Gel)
Transport
Serum (Aldosterone): Refrigerated
Plasma (Direct Renin): CRITICAL FROZEN
Preferred Transport Temperature
Aldosterone serum frozen
Direct Renin plasma frozen
Processing
ALDOSTERONE:
Centrifuge serum collection tube. Separate and send 1.0 mL serum in a screw-capped plastic vial. Label this tube “serum-aldosterone”.
DIRECT RENIN:
Immediately after collection, centrifuge lavender EDTA collection tube and separate plasma
from cells. Send 1.5 mL plasma in screw capped plastic vial. CRITICAL FROZEN. Attach the plasma
label to this sample.
Stability
Aldosterone:
Ambient: Unacceptable
Refrigerated: 5 days
Frozen: 1 month.
Renin:
Ambient: Unacceptable
Refrigerated: Unacceptable
Frozen: 1 month
Minimum Testing Volume
Aldosterone: 0.5 mL
Direct Renin: 1.0 mL
Reference Range
Aldosterone: Upright: <39.2 ng/dL, Supine: <23.2 ng/dL
Aldosterone/Direct Renin Ratio: 0.1-3.7; Renin: 3.1-57.1 pg/mL
Methodology
Aldosterone: Chemiluminescence; Direct Renin: Chemiluminescence; Ratio: Calculation
Performed
Monday-Friday
Reported
2-4 days
CPT Codes
82088, 84244
Unacceptable Conditions
Aldosterone: Plasma: gross hemolysis, gross lipemia, incorrect sample identification
Direct Renin: Hemolysis, grossly lipemic, icteric, non-frozen plasma, serum, plasma dark blue trace element EDTA, incorrect sample type identification