Fig. 4From: Dural sac cross-sectional area is a highly effective parameter for spinal anesthesia in geriatric patients undergoing transurethral resection of the prostate: a prospective, double blinded, randomized studya The changes of the MAP over the first 30 min after spinal injection in two groups, the MAP were significent decreased at the time of 10 min, 12.5 min and 15 min in group C than in group U, #P< 0.001. b The changes of the HR over the first 30 min after spinal injection in two groups, there were no significent different at each time in two groupsBack to article page