Background Delayed facial palsy ( DFP) after microvascular decompression ( MVD) in patients with hemifacial spasm ( HFS) is not uncommon,but the cause remains unknown. Objectives To assess whether intraoperative elect...Background Delayed facial palsy ( DFP) after microvascular decompression ( MVD) in patients with hemifacial spasm ( HFS) is not uncommon,but the cause remains unknown. Objectives To assess whether intraoperative electromyography ( EMG) and brainstem auditory evoked potential ( BAEP) can predict DFP after MVD. Methods Between September 2009 and February 2011 we examined 86 patients,9 of whom ( 10. 4% ) developed DFP after MVD on the same side. All patients underwent MVD and were followed - up for a median period of 13 months ( range 6-22) . We retrospectively examined intraoperative facial EMG and BAEP findings using our MVD patients' registry. We excluded secondary HFS and immediate postoperative facial palsy after MVD in this study. We assessed the prevalence and clinical characteristics of DFP and compared EMG and BAEP findings between DFP and non-DFP groups. Results: All pa- tients recovered completely,with a mean time to recovery of 37. 8 days ( range 22-57) . There were no significant differences between DFP and non - DFP patients in terms of the amplitude and latency of intraoperative EMG and BAEP. Conclusion The usefulness of intraoperative facial EMG and BAEP is limited and cannot predict DFP after MVD for HFS. We speculate that DFP after MVD is not associated with permanent nerve damage according to the EMG findings.展开更多
假关节炎是骶骨长节段融合术后最常见的并发症，往往发生于朐腰段或腰骶段关节。由于在矢状面或冠状面均有进展和失代偿的危险，脊柱畸形患者假关节炎的表现是明显的。髂嵴骨移植（iliaccrestbonegraft，ICBG）可以改善术后融合率，但...假关节炎是骶骨长节段融合术后最常见的并发症，往往发生于朐腰段或腰骶段关节。由于在矢状面或冠状面均有进展和失代偿的危险，脊柱畸形患者假关节炎的表现是明显的。髂嵴骨移植（iliaccrestbonegraft，ICBG）可以改善术后融合率，但存在失血多、手术时间长、住院时间长、供区有坏死风险等问题。重组骨形态发生蛋白2（recombinant human bone morphogenetic proteins-2,rhBMP．2）理论上可避免上述缺陷，骨融合率也高于ICBG。展开更多
文摘Background Delayed facial palsy ( DFP) after microvascular decompression ( MVD) in patients with hemifacial spasm ( HFS) is not uncommon,but the cause remains unknown. Objectives To assess whether intraoperative electromyography ( EMG) and brainstem auditory evoked potential ( BAEP) can predict DFP after MVD. Methods Between September 2009 and February 2011 we examined 86 patients,9 of whom ( 10. 4% ) developed DFP after MVD on the same side. All patients underwent MVD and were followed - up for a median period of 13 months ( range 6-22) . We retrospectively examined intraoperative facial EMG and BAEP findings using our MVD patients' registry. We excluded secondary HFS and immediate postoperative facial palsy after MVD in this study. We assessed the prevalence and clinical characteristics of DFP and compared EMG and BAEP findings between DFP and non-DFP groups. Results: All pa- tients recovered completely,with a mean time to recovery of 37. 8 days ( range 22-57) . There were no significant differences between DFP and non - DFP patients in terms of the amplitude and latency of intraoperative EMG and BAEP. Conclusion The usefulness of intraoperative facial EMG and BAEP is limited and cannot predict DFP after MVD for HFS. We speculate that DFP after MVD is not associated with permanent nerve damage according to the EMG findings.
文摘假关节炎是骶骨长节段融合术后最常见的并发症，往往发生于朐腰段或腰骶段关节。由于在矢状面或冠状面均有进展和失代偿的危险，脊柱畸形患者假关节炎的表现是明显的。髂嵴骨移植（iliaccrestbonegraft，ICBG）可以改善术后融合率，但存在失血多、手术时间长、住院时间长、供区有坏死风险等问题。重组骨形态发生蛋白2（recombinant human bone morphogenetic proteins-2,rhBMP．2）理论上可避免上述缺陷，骨融合率也高于ICBG。
