Various issues had been pointed out when undergoing the anesthesia for elderly patients with
sevoflurane, such as delayed emergence, post-operative trouble with swallowing.
Desflurane, which has a lower blood/gas partition coefficient, is expected to contribute the
better emergence, along with the recent progress on optimization of delivered amount of
anesthesia.
The purpose of this study is to compare the time to emergence in long elderly patient cases
with desflurane or sevoflurane, with the recently developed drug-delivery optimization system
"Aisys®" (GE Healthcare Japan).