Aldosterone, Serum

Casandra

Casandra Test Code AR81269Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0070015CPT Code 82088

Also known as: ALDOST

Clinical Use

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Use

Aldosterone, a hormone produced by the adrenal glands, plays a critical role in maintaining blood pressure and sodium balance. Testing for serum aldosterone is pivotal for diagnosing disorders such as hyperaldosteronism and adrenal insufficiency. Elevated levels may suggest primary aldosteronism, while low levels could indicate adrenal insufficiency. The assessment of aldosterone levels in conjunction with renin may provide insights into the body's fluid balance, especially concerning sodium intake and patient posture, which can significantly affect the hormone's concentrations.

Special Instructions

For accurate results, patient preparation is required: collect the specimen midmorning after the patient has been sitting, standing, or walking for a minimum of two hours, followed by sitting for 5-15 minutes. It is important to refer to the Additional Technical Information for optimal patient preparation, especially regarding sodium intake and medication management.

Limitations

Test results may be influenced by the patient's sodium intake and body posture at the time of collection. High sodium intake can suppress, whereas low sodium may elevate, serum aldosterone levels, leading to false readings. The interaction with medications for hypertension could also affect results, and variance in reference intervals based on age, posture, and sodium intake should be considered when interpreting test outcomes.

Test Details

FDA Approved