Anesthetic technique and development of XXXX after posterior fossa surgery in the sitting position.

@entity1 @entity5745 @entity1276 @entity16 @entity1875 @entity3810 @entity5161 @entity1211 @entity3575
OBJECTIVE: @entity5745 is a well-known complication of surgical procedures performed with the @entity1 placed in the sitting position. Its incidence and intensity were prospectively studied in 90 consecutive @entity1 undergoing a posterior fossa procedure in this position. Various anesthetic agents, with different effects on cerebral hemodynamics, were used. MATERIAL AND METHODS: @entity1 were randomly assigned to one of three groups. In group 1 (n=30), anesthesia was induced and maintained with @entity1875 . In group 2 (n=30), anesthesia was induced with thiopental and maintained with @entity5161 . In group 3 (n=30), anesthesia was induced with thiopental and maintained with @entity3810 and low-dose @entity5161 . All @entity1 received a load dose and an infusion of @entity3575 . A cerebral computed tomography scan was performed to all @entity1 8 hours after surgery for detecting the presence and location of intracranial air. The size of @entity5745 was ascertained using the formula for calculating the volume of a spheroid: v = PI / 6. x. y. z. Preoperative diagnosis, existence of shunted or non-shunted @entity1276 , type and duration of the surgical procedure, detection of intraoperative @entity1211 , and appearance of new neurological symptoms in the postoperative period, were recorded. RESULTS: All @entity1 included in the study developed postoperative @entity5745 . There were no significant differences (P = 0.133) in the estimated volume of intracranial air between the groups (group 1, volume = 38.3 -/+ 35.4 ml; group 2, volume = 48.9 -/+ 36.3 ml; group 3, volume = 31.5 -/+ 28.4 ml). Only two @entity1 in the group 2 manifested symptoms of @entity16 due to the pressure exerted by the intracranial air. CONCLUSIONS: Despite the hypothetical diverse effects of the three anesthetic techniques used in this series on cerebral hemodynamics, our results suggest that none of them has a substantial effect on the amount of intracranial air detected after posterior fossa procedures performed in seated individuals. To the best of our knowledge this is the first report that addresses in a prospective manner the effects of several habitual anesthetic techniques on the development of @entity5745 in @entity1 submitted to posterior fossa procedures performed in the sitting position.
