the Effect of Dexmedetomidine and Magnesium Sulfate in Open Resection of Pheochromocytoma

which in addition to the orally prescribed drugs; on admission to the ICU, the Pheo-patient has serum-Mg level measurement \& a bolus of 40 mg/kg MgSo₄ is given I.V. \& may be repeated until the therapeutic level of MgSo₄ 2-4 mmol/Liter is reached (7\&10). Dexmedetomidine sedation is started the evening prior to surgery by loading dose of 1µg/Kg followed by 0.2-0.7 µg/Kg/hour according to each patient

1\) Traditional group in which the patients̕ hemodynamic adjustment will be conducted using orally or IV α₁ \& β-adrenergic blockers \[Prazocin (minipress): 0.5-20 mg/day, Propranolol (Inderal) :10-360 mg/day, Bisoprolol (Concor): 2.5-20 mg/day, Atenolol (Tenormin): 25-100 mg/day \&/or Labetalol (Trandate)200-600 mg/day, ACI \& ACRB e.g. Tritace 2.5-10 mg/day \& Atacand 4-16 mg/day\]