RT Journal Article SR Electronic T1 Hypoglycemia following excision of pheochromocytoma JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 367 OP 368 VO 116 IS 4 A1 Wilkins, G. E. A1 Schmidt, N. A1 Doll, W. A. YR 1977 UL http://www.cmaj.ca/content/116/4/367.abstract AB In two patients hypoglycemia developed in the immediate postoperative period after removal of a pheochromocytoma. In one patient the serum insulin value was elevated when he was hypoglycemic. Preoperative preparation of patients with pheochromocytoma requires use of an alpha-adrenergic blocking agent to decrease blood pressure and allow the plasma volume to expand; in the two patients referred to phenoxybenzamine was given orally. It is difficult to recognize hypoglycemia postoperatively because of the altered consciousness associated with a major operation, analgesics, anesthetic agents and the effects of adrenergic blocking medications; hence the physician must watch closely for this complication.