A 45-year-old man is evaluated for resistant hypertension and persistent muscle cramps. His blood pressure is mm Hg despite strict adherence to a three-drug antihypertensive regimen that includes a thiazide diuretic. Laboratory testing reveals a serum potassium of mEq/L and a normal serum sodium. The physician suspects an endocrine etiology for his secondary hypertension. Arrange the following diagnostic and therapeutic steps in the correct chronological sequence for establishing the diagnosis and managing this patient's condition.
- 1Determine the plasma aldosterone concentration to plasma renin activity (PAC/PRA) ratio
- 2Perform an intravenous saline infusion test
- 3Obtain a high-resolution computed tomography (CT) scan of the abdomen
- 4Perform bilateral adrenal venous sampling (AVS)
- 5Proceed with unilateral laparoscopic adrenalectomy
Cevap
The correct sequence begins with the PAC/PRA screening, followed by the saline infusion confirmatory test, abdominal CT imaging, adrenal venous sampling, and finally unilateral adrenalectomy.
The correct diagnostic algorithm for primary aldosteronism follows a strict three-phase biochemical and anatomical pathway: 1) Screening with PAC/PRA ratio to detect hyperaldosteronism; 2) Confirmation with a suppression test (saline infusion) to prove autonomous secretion; 3) Subtype classification. Subtype classification begins with a CT scan for anatomical mapping. Because adrenal incidentalomas are common, CT must be followed by AVS (in patients over 35) to functionally prove unilateral secretion before committing to unilateral adrenalectomy.
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Anahtar Kavram
Diagnostic algorithm for Primary Aldosteronism (Conn's Syndrome)