Test Directory

Aldosterone:renin ratio

Containers - Adult

RedCapTubeEDTAKE2.7ml.jpg
Pink Capped EDTA Blood
Volume Range

2.7 ml

Containers - Child

PinkCapPaediatric.jpg
Pink Cap - Paediatric
Volume Range

​2.0 ml

Laboratory Site

RIE
51 Little France Crescent
Old Dalkeith Road
Edinburgh
EH16 4SA
Telephone (Biochemistry): 0131 242 6806

Transport arrangements

Sample should be received in the laboratory on the same day of collection.

Sample storage arrangements

Do not refrigerate samples.

Special instructions for collection

The ARR is a screening test for primary hyperaldosteronism and Endocrine team input is recommended before undertaking this test. A morning sample is preferred, and the patient should be seated for 15 minutes prior to venepuncture. The patient should have unrestricted dietary salt intake. Various anti-hypertensive medications effect renin and aldosterone measurement therefore medications should be noted. Some medications may need to be discontinued for at least 4 weeks, if possible (in particular spironolactone, eplerenone, amiloride, triamterene and potassium-wasting diuretics).

General additional information

A single red cap (EDTA) tube filled to the line (2.7 mL) is sufficient for both renin and aldosterone tests.