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      Bridge technique for hemifacial spasm with vertebral artery involvement

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          Abstract

          Background

          To assess efficacy and safety of a newly developed decompression technique in microvascular decompression for hemifacial spasm (HFS) with vertebral artery (VA) involvement.

          Methods

          A rigid Teflon (Bard ® PTFE Felt Pledget, USA) with the ends placed between the lower pons and the flocculus creates a free space over the root exit zone (REZ) of the facial nerve (bridge technique). The bridge technique and the conventional sling technique for VA-related neurovascular compression were compared retrospectively in 60 patients. Elapsed time for decompression, number of Teflon pieces used during the procedure, and incidences of intraoperative manipulation to the lower cranial nerves were investigated. Postoperative outcomes and complications were retrospectively compared in both techniques.

          Results

          The time from recognition of the REZ to completion of the decompression maneuvers was significantly shorter, and fewer Teflon pieces were required in the bridge technique than in the sling technique. Lower cranial nerve manipulations were performed less in the bridge technique. Although statistical analyses revealed no significant differences in surgical outcomes except spasm-free at postoperative 1 month, the bridge technique is confirmed to provide spasm-free outcomes in the long-term without notable complications.

          Conclusions

          The bridge technique is a safe and effective decompression method for VA-involved HFS.

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          Most cited references23

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          Characteristic anatomical conformation of the vertebral artery causing vascular compression against the root exit zone of the facial nerve in patients with hemifacial spasm.

          Hemifacial spasm (HFS) is caused by tortuous offending vessels near the facial nerve root exit zone. However, the definitive mechanism of offending vessel formation remains unclear. We hypothesized that vascular angulation and tortuosity, probably caused by uneven vertebral artery blood flow, result in vascular compression of the facial nerve root exit zone.
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            Hypertension of neurogenic origin: effect of microvascular decompression of the CN IX-X root entry/exit zone and ventrolateral medulla on blood pressure in a prospective series of 48 patients with hemifacial spasm associated with essential hypertension.

            In spite of solid anatomical and physiological arguments and the promising results of Jannetta in the 1970s, treating essential hypertension by microvascular decompression (MVD) of the brainstem has not gained acceptance as a mainstream technique. The main reason has been a lack of established selection criteria. Because of this, the authors' attempts have been limited to patients referred for MVD for hemifacial spasm (HFS) who also had hypertension likely to be related to neurovascular compression (NVC).
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              Vertebral artery pexy for microvascular decompression of the facial nerve in the treatment of hemifacial spasm.

              Hemifacial spasm (HFS) is caused by arterial or venous compression of cranial nerve VII at its root exit zone. Traditionally, microvascular decompression of the facial nerve has been an effective treatment for posterior inferior and anterior inferior cerebellar artery as well as venous compression. The traditional technique involves Teflon felt or another construct to cushion the offending vessel from the facial nerve, or cautery and division of the offending vein. However, using this technique for severe vertebral artery (VA) compression can be ineffective and fraught with complications. The authors report the use of a new technique of VA pexy to the petrous or clival dura mater in patients with HFS attributed to a severely ectatic and tortuous VA, and detail the results in a series of patients.
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                Author and article information

                Contributors
                takuro39@gmail.com
                Journal
                Acta Neurochir (Wien)
                Acta Neurochir (Wien)
                Acta Neurochirurgica
                Springer Vienna (Vienna )
                0001-6268
                0942-0940
                6 October 2021
                6 October 2021
                2021
                : 163
                : 12
                : 3311-3320
                Affiliations
                [1 ]Department of Neurosurgery, Subarukai Koto Memorial Hospital, 2-1 Hiramatsu-cho, Higashiohmi-shi, Shiga 527-0134 Japan
                [2 ]Department of Neurosurgery, Indonesia National Brain Center Hospital, East Jakarta, Special Capital Region of Jakarta Indonesia
                [3 ]Raleigh Neurosurgical Clinic, Raleigh, NC USA
                [4 ]GRID grid.189509.c, ISNI 0000000100241216, Division of Neurosurgery, , Duke University Medical Center, ; Durham, NC USA
                Article
                5006
                10.1007/s00701-021-05006-8
                8599217
                34613530
                c8ff1d83-0200-4f5e-ad53-60236618ba2e
                © The Author(s) 2021

                Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                Categories
                Original Article - Functional Neurosurgery - Other
                Custom metadata
                © Springer-Verlag GmbH Austria, part of Springer Nature 2021

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