Plasma Direct Renin

Specimen Required

3cc EDTA BLOOD (CBC VIAL)

Fasting Required

Purpose of the Test

The Plasma Direct Renin test is used to measure the level of renin in the blood, which plays a critical role in regulating blood pressure and fluid balance in the body. The test is usually ordered to evaluate the cause of hypertension (high blood pressure) or to monitor the effectiveness of treatment for hypertension.

When this test is required

The test is usually requested when a person has high blood pressure that is difficult to control with medication or when a healthcare provider suspects an underlying condition, such as renal artery stenosis or aldosteronism.

What the Test Detects

The test measures the level of renin, an enzyme produced in the kidneys that plays a key role in regulating blood pressure and fluid balance.

Preparation for the Test

There is no specific test preparation needed. However, it is recommended to inform the healthcare provider about any medications or supplements being taken before the test.

Sample Requirements

The test requires a blood sample, usually obtained through a simple blood draw.

Additional Notes

The Plasma Direct Renin test is often ordered in combination with other tests, such as aldosterone, electrolyte levels, and imaging studies, to evaluate the cause of hypertension. It is recommended to discuss the test results with a healthcare provider for further guidance.

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