BISPEGTRAL INDEX FOR EVALUATION OF RECOVERY AFTER SEVOFLURANE ANESTHESIA
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Bispectral index (BIS) is a method of monitoring depth of hypnosis dur ing anesthesia. Guided anesthetic administration using BIS target range mag be associated with a reduction in volatile anesthetic and faster re covery. We evaluated recovery profile after sevoflurane anesthesia with and without BIS monitoring. 60 ASA I and II patients, aged 20-60 years, were enrolled in this study. Patients were divided randomly into two groups (n= 30). In group A (GA) concentration of sevoflurane was adjusted according to clinical data. In group B (GB) concentration of sevoflurane was adjusted to keep BIS reading in range of 50 5. The following emergency times were eval uated: spontaneous eye opening, responding to verbal command and or ientation time. Also, duration of patients stay in post anesthesia care unit (PACU) was determined and all patients were questioned about recall 24 hours after operation. End tidal sevoflurane concentration was significantly high in GA, dur ing maintenance until stop of inhalattonal agents, compared to GB. Early recovery times are shorter in GB compared to GA, but not significant When we compared duration of patients stay in PACU to be eligible for transfer to ward, it was significantly shorter in GB. No patient can recall any events during operation.