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Fully endoscopic microvascular decompression of the hemifacial spasm: our experience

  • Technical Note - Neurosurgical technique evaluation
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Abstract

Purpose

Microvascular decompression (MVD) surgery has been accepted as a potentially curative method for hemifacial spasm (HFS). The primary cause of failure of MVD is incomplete decompression of the offending vessel due to inadequate visualization. This study is aimed at evaluating the benefit of endoscopic visualization and the value of fully endoscopic MVD.

Methods

From March 2016 to March 2018, 45 HFS patients underwent fully endoscopic MVD in our department. From opening the dura to preparing to close, the assistant held the endoscope and the surgeon operated. Abnormal muscle response (AMR) and brainstem auditory evoked potentials (BAEP) were monitored. For every patient, the offending vessel was transposed or interposed and achieved complete decompression. AMR was used to evaluate the adequacy of decompression at the end of the surgery. The intra-operative findings and postoperative outcomes and complications were analyzed.

Results

Immediately after surgeries, 39 patients (86.7%) achieved excellent result; 2 cases (4.4%) had good result. So the postoperative effective rate was 91.1% (41/45). During 12–36 month follow-up, the outcomes were excellent in 42 cases (93.3%) and good in 2 cases (4.4%), and the effective rate reached to 97.8% (44/45). No recurrence was noted. The postoperative complications were found in 2 patients (4.4%). One patient (2.2%) showed delayed facial palsy on the tenth day but was fully recovered 1 month later. Intracranial infection was noticed in 1 patient (2.2%) and was cured by using intravenous antibiotics for 2 weeks. There was no hearing impairment, hoarseness, or other complications.

Conclusions

Fully endoscopic MVD is both safe and effective in the treatment of HFS. Electrophysiological monitoring is helpful to gain a good result and reduce hearing impairment.

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Funding

Shanghai Jiaotong University provided financial support in the form of Medical and Engineering Cross Foundation (Grant No. YG2016QN68).

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Correspondence to Xu-Hui Wang.

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The authors declare that they have no conflict of interest.

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This study was approved by the ethics committee of Xinhua Hospital, Shanghai Jiaotong University School of Medicine.

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Informed consent was obtained from all individual participants included in the study.

This article does not contain any studies with human participants performed by any of the authors.

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Feng, BH., Zhong, WX., Li, ST. et al. Fully endoscopic microvascular decompression of the hemifacial spasm: our experience. Acta Neurochir 162, 1081–1087 (2020). https://doi.org/10.1007/s00701-020-04245-5

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  • DOI: https://doi.org/10.1007/s00701-020-04245-5

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