highly significantP <0.0001
This difference was found to be highly significant at 5 minutes ( P <0.0001), 30 minutes ( P <0.0001), and 45 minutes after CO 2 insufflation ( P <0.0001) and at 1 minute after extubation ( P <0.0001) but was found to be statistically comparable at 1 minute after CO 2 insufflation and at 10 minutes after extubation.