Pre-surgical preparation for pheochromocytoma: Indicators that should be observed before surgery: 1. Blood pressure in prone position, heart rate x 4 times/day (standing blood pressure should be measured 2-3 minutes after the patient stands up), if necessary, blood pressure and heart rate should be measured in prone, standing position immediately, 3 minutes, 5 minutes and 10 minutes, and changes in postural blood pressure should be noted. 2. 2.Weight (measured every week in the morning on an empty stomach) 3.Blood test every two weeks (mainly pay attention to the change of HCT) 4.Both hands hemogram every two weeks to evaluate the microvascular score of both hands. 5.Extremity temperature 6.Glucose changes 7.Ambulatory blood pressure monitoring can be reviewed every 2 weeks (while leaving 12h urinary catecholamines day and night) 8.Urine catecholamines can be reviewed every 2 weeks 9.Pay attention to the number of stools Indicators that need to be reviewed regularly in medication preparation: Examination items Repeated interval blood routine (Hct), microcirculation of both hands, ambulatory blood pressure monitoring, 24h urinary catecholamines for 2 weeks, morning fasting weight for 1 week Week Medication preparation For patients with persistent hypertension, pressinidine is added from 30mgQ8h (phenazopyridine should be added from 5-10mgBid), for patients with paroxysmal hypertension (usually not high blood pressure), pressinidine is added from 30mgQd~Q12h (phenazopyridine should be added from 5mgQd~Bid), gradually increasing the dose, while observing blood pressure changes and adjusting the drug use. If the patient has a sustained heart rate >120bpm in the prone position or has supraventricular arrhythmias, beta blockers may be considered if alpha blockers are already being used. The drug preparation time should be 2 weeks to 4 weeks, while depending on blood pressure and other changes. Indicators of readiness: 1. Blood pressure control is approximately normal, and the number of hypertensive episodes is significantly reduced or disappears; 2. Hypermetabolic symptoms improve or disappear, such as reduced sweating, weight gain, and correction of metabolic disorders such as blood glucose; 3. Blood volume is restored and peripheral circulation improves; 4. Original postural hypotension is reduced.