Management of cerebral hemispherectomy in children

Surgical removal of a cerebral hemisphere may be undertaken in patients with intractable seizure disorders. Anesthetic management of such patients has not been reviewed in detail before. This study retrospectively analyzed hospital records of ten patients undergoing cerebral hemispherectomy at the Johns Hopkins Hospital between July 1983 and February 1988. Patient records were reviewed for diagnosis, physical characteristics, preoperative medications, anesthetic management, and postoperative course in the intensive care unit (ICU). Massive and sudden blood loss was a common finding in these patients, and during the intraoperative and postoperative periods, fluid resuscitation frequently was an ongoing process. In some patients, the blood loss exceeded one blood volume and was associated with coagulopathy, hypokalemia, and hypothermia. Urine output was elevated by a glucose-induced diuresis in some patients, giving misleading information as to intravascular volume status. Seizures and hemorrhage into the hemispherectomy cavity were management problems in the ICU. From this review, the authors conclude that blood loss may be marked and precipitous during surgical removal of a cerebral hemisphere. Monitoring of intra-arterial pressure and central venous pressure (CVP) is necessary for patient management during the intraoperative and postoperative periods. Intravenous (IV) access should allow rapid intravascular volume administration as it becomes necessary. Patients should remain intubated and observed closely during the immediate postoperative period due to difficulties with hemodynamic stability, seizures, and hemorrhage.