Intraoperative visual evoked potential monitoring in suprasellar tumors in children
Medical Journal of Cairo University [The]. 2004; 72 (1): 113-118
en Inglés
| IMEMR
| ID: emr-67571
ABSTRACT
In this study, visual evoked potentials [VEPs] were studied in 15 children undergoing surgery for parasellar tumors [12 craniopharyngiomas and 3 chiasmal gliomas]. The preoperative visual function was assessed by a standard ophthalmological work up. VEP was performed at different time intervals during surgery and postoperatively. Anesthesia was induced with fentanyl 2 mu kg-1, followed by diprivan 2 mg kg-1 i.v. and tracium 0.5 mg kg-1 i.v. to facilitate intubation. Anesthesia was maintained using diprivan 0.1 mg kg-1 min-1 using a syringe pump and was adjusted to give the patient 0.1 g kg-1 hr-1 together with 1% sevoflurane and O2. The patients were chemically ventilated to maintain normocapnia PaCO2 [30-35 mmHg]. The hemodynamics [B1 Pr and HR], O2 saturation and body temperature were maintained constant throughout the operation. The equipment used in measuring VEP was LED goggles LS-101J [Nihon Koden]. Averages were obtained after stimulation of both eyes separately and the side of stimulation was changed after two averages. Visual acuity was improved postoperatively in eight cases. A significant VEP change occurred if latency prolongation of more than 50% was seen. The changes of VEPs were so profound [complete potential loss occurred in ten cases]
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Índice:
IMEMR (Mediterraneo Oriental)
Asunto principal:
Agudeza Visual
/
Monitoreo Intraoperatorio
/
Resultado del Tratamiento
/
Base del Cráneo
/
Neoplasias de la Base del Cráneo
/
Potenciales Evocados Visuales
/
Anestesia General
Límite:
Femenino
/
Humanos
/
Masculino
Idioma:
Inglés
Revista:
Med. J. Cairo Univ.
Año:
2004
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