Abstract: ［Abstract］ Objective〖HTSS〗〓To investigate the effect of improved microvascular decompression(MVD) on the incidence of postoperative complications.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓The clinical data of 235 patients undergoing MVD were analyzed retrospectively. Among them, traditional method of skull closing was used in 115 patients and 120 patients received modified method of skull closing. The modifications involved aspects including forming bone window, duradic cutting method，suturing of dual matter, skull reconstruction and suturing of skin. To study the effect, the operation time(craniotomy time, intracranial operation time, closed cranial time) and other complications were compared between the traditional and modified groups.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓 The craniotomy time and intracranial operation time of modified group were shorter than those of traditional group, while the craniotomy time was longer than that of traditional group, and the difference was statistically significant(P＜005).The incidence of postoperative complications in traditional group was 20.9%, which included 4 cases of cerebrospinal fluid leakage, 10 cases of hearing loss, 8 cases of tinnitusand 2 cases of facial paralysis. The incidence of postoperative complications in modified group was 8.3%, which included 5 cases of hearing loss，4 cases of tinnitus and1 cases of facial paralysis. There was significant difference in incidence of postoperative complications between two groups(P＜005).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓The improvement of microvascular decompression for hemifacial spasm can reveal the surgical perspective, reduce the operation time and the postoperative complications.

Key words: microvascular decompression, dural suture, technical improvement