Pheochromocytoma Resection
Classic endocrine surgery requiring precise hemodynamic management and a solid understanding of adrenergic physiology.
"A 42 y.o. male with a history of hypertension and episodic headaches is scheduled for a robotic-assisted left adrenalectomy for a suspected pheochromocytoma. PMH: BP 165/105, HR 98. He is currently on phenoxybenzamine."
Pre-operative alpha-blockade (Roizen criteria), intraoperative hypertensive crisis management, and post-ligation hypotension.
The 'Golden Rule' of Pheo: Never beta-block before you alpha-block. Defend your choice of vasoactive agents (Clevidipine vs. Nitroprusside) and prepare for the massive drop in SVR once the tumor is clamped.
How a Board-Certified Consultant answers this scenario.
Managing a pheochromocytoma requires meticulous hemodynamic control and a deep understanding of adrenergic receptor physiology. My focus is preventing a hypertensive crisis during tumor manipulation and cardiovascular collapse after tumor ligation. I have confirmed that the patient has met Roizen criteria for adequate alpha-blockade (stable BPs, no EKG changes, orthostatic).
During tumor manipulation, I will use rapid-acting vasodilators like nitroprusside or phentolamine to manage BP spikes. If tachycardia develops, I will only then consider a beta-blocker, ensuring alpha-blockade is already solid to avoid 'unopposed alpha' activity. Once the adrenal vein is ligated, I expect a precipitous drop in SVR; I will be ready with aggressive fluid boluses and a norepinephrine infusion to maintain coronary and cerebral perfusion. I will also monitor glucose levels closely, as these patients often develop profound hypoglycemia after the catecholamine surge is removed.