Aldosterone/Direct Renin Ratio

ARR; Aldosterone to Renin Ratio; Aldosterone: Direct Renin Ratio

5 days

Chemiluminescent Immunoassay (CLIA)

Accredited NRL Laboratory

Wednesday and Friday

Calculates the ratio of aldosterone to renin to screen for primary aldosteronism, a cause of secondary hypertension.

Serum and Plasma

1 mL plasma and 0.5 mL serum

Lavender top (EDTA) tube and Red top tube or Gel barrier tube

No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.

This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.