Aldosterone-to-Renin Ratio Test | Lab Test in Orange, CA
Order Aldosterone-to-Renin Ratio Test | Lab Test in Orange, CA
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Order Aldosterone-to-Renin Ratio Test | Lab TestThe aldosterone-to-renin ratio is a calculated value derived from two separate hormone measurements: aldosterone and renin. Because the ratio combines these results rather than measuring a single substance, it offers a compact view of how the adrenal glands and kidneys interact to regulate blood pressure and fluid balance. Clinicians order this test most often when evaluating secondary causes of hypertension, particularly primary aldosteronism, in which aldosterone production remains inappropriately high while renin stays suppressed.
About Aldosterone-to-Renin Ratio Test | Lab Test in Orange
The aldosterone-to-renin ratio compares aldosterone, the adrenal hormone that promotes sodium retention, with renin, the enzyme released by the kidneys when blood pressure or sodium falls.
Aldosterone acts on the distal nephron to increase sodium reabsorption and potassium excretion, which raises blood volume and, indirectly, blood pressure. Renin is secreted by juxtaglomerular cells in the kidney in response to reduced renal perfusion, low sodium delivery, or sympathetic stimulation. Renin then drives the formation of angiotensin II, a potent vasoconstrictor that also stimulates aldosterone release.
Under normal conditions, aldosterone and renin rise and fall together, so the ratio remains relatively stable. In primary aldosteronism, autonomous aldosterone secretion suppresses renin through negative feedback, producing a disproportionately high ratio. The opposite pattern—elevated renin with normal or low aldosterone—can occur in renovascular disease, dehydration, or diuretic use.
Because the ratio is a calculated figure, it depends on the accuracy and units of both component assays. Laboratories often report the ratio using conventional units such as ng/dL for aldosterone and ng/mL per hour for renin activity, or direct renin concentration in mIU/L. Interpretation therefore requires attention to the assay method and the reference interval supplied by the performing laboratory.
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Frequently Asked Questions
Where can I arrange Aldosterone-to-Renin Ratio Test | Lab Test in Orange, CA?
Accredited laboratories serving Orange, CA provide Aldosterone-to-Renin Ratio Test | Lab Test, per LabTestingCenter.
What determines the price of Aldosterone-to-Renin Ratio Test | Lab Test in Orange?
Price for Aldosterone-to-Renin Ratio Test | Lab Test depends on the panel and the laboratory, so LabTestingCenter recommends confirming a written estimate first.
How long do Aldosterone-to-Renin Ratio Test | Lab Test results take in Orange?
LabTestingCenter documents a 1-3 business days turnaround for most Aldosterone-to-Renin Ratio Test | Lab Test results in Orange.
Do I need a referral for Aldosterone-to-Renin Ratio Test | Lab Test in Orange?
Many certified laboratories accept direct requests, and LabTestingCenter notes that insurance billing may need a referral.
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