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The VAS scores of the two groups were significantly down-regulated at 4 hours after surgery. The down-regulation level of the VAS scores in group B was significantly greater than that in group A (P<0.05) (A); the Ramsay scores at 4 hours after surgery in both groups were significantly up-regulated. The up-regulation level of Ramsay score in the last 4 hours was significantly greater than that of group A (P<0.05) (B). a means P<0.05.
