However, it is undeniable that the disappearance of LSR indicates sufficient decompression of the responsible vessel, which can be used as an indicator for judging the success of MVD [11-12], and the more complete the disappearance of LSR during MVD surgery, the better the decompression effect [13-14]. In this study, the effective rates of patients in the small vessel monitoring group, the vertebral artery-related monitoring group and the non-monitoring group were 94.1%, 88.5% and 71.9%, respectively, on the 1st day after the operation, and the difference between the groups was statistically significant (p<0.05). , the small vessel monitoring group was significantly better than the no monitoring group; the patients in the group with complete disappearance of LSR during operation were better than those in the group with no significant changes in LSR in terms of immediate postoperative spasm relief (P
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