During an evaluation for treatment-resistant hypertension, diaphoresis, and episodic tachycardia, a patient is found to have significantly elevated -hour urine fractionated metanephrines. Subsequent cross-sectional abdominal imaging confirms a unilateral -cm adrenal mass, establishing the diagnosis of a pheochromocytoma. A multidisciplinary team plans a definitive surgical intervention.
Arrange the following perioperative management steps in the mandatory chronological order required to safely optimize the patient and prevent catastrophic hemodynamic instability.
- 1Initiate therapy with a long-acting alpha-adrenergic antagonist
- 2Add a beta-adrenergic antagonist to the medication regimen
- 3Administer intravenous isotonic crystalloids for acute volume expansion
- 4Proceed with minimally invasive adrenalectomy
Cevap
The correct sequence for the surgical preparation and management of a pheochromocytoma is to first initiate alpha-adrenergic blockade, followed by beta-adrenergic blockade, then administer volume expansion, and finally perform the surgical resection.
The correct chronological sequence safely prepares the patient for the physiological stress of a pheochromocytoma resection. Alpha-blockade (typically phenoxybenzamine) must be started 10-14 days prior to surgery to control blood pressure and expand the vascular bed. Beta-blockade is added subsequently (2-3 days later) to manage resulting tachycardia. Because the patient is chronically volume depleted from prolonged vasoconstriction, generous sodium loading and preoperative intravenous crystalloids are administered next. Once hemodynamically optimized, the patient can safely undergo definitive surgical adrenalectomy.
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Anahtar Kavram
The perioperative surgical pathway for pheochromocytoma mandates strict sequential administration of alpha-blockade followed by beta-blockade and subsequent intravascular volume expansion prior to definitive tumor resection.