Renin Activity Plasma Test
A Plasma Renin helps determine the cause of hypertension in cases where signs of kidney disease are present.
A plasma renin may be ordered when a patient has high blood pressure and low potassium. Even if potassium is normal, testing may be done if typical medications do not control the high blood pressure or if hypertension develops at an early age. Primary aldosteronism is a potentially curable form of hypertension, so it is important to detect and treat it properly.
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Plasma Renin Activity (PRA), PRA
Blood
No fasting required. If possible, medications should be stopped 3 weeks prior to collection. Check with physician before stopping any medications. It is recommended that the patient be ambulatory for at least 30 minutes before blood collection.
5-7 days. May take longer based on weather, holiday or lab delays.
The Potassium Blood Test measures potassium levels in the blood to detect imbalances causing hyperkalemia or hypokalemia.
The Potassium Urine Test, 24-Hour, checks how much potassium leaves your body in urine over 24 hours to help find problems with your kidneys, adrenal glands, or body’s balance of fluids and minerals.
Cortisol Urine Test, Urinary Free, 24-Hour
The Cortisol Urine Test, Urinary Free, 24-Hour, measures cortisol levels in the urine over 24 hours to help screen for adrenal gland disorders.