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Intraoperative motor-evoked potential monitoring during coil embolization for anterior choroidal artery aneurysms

  • Interventional Neuroradiology
  • Published:
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Abstract

Purpose

Intraoperative motor-evoked potential (MEP) monitoring is widely used in the neck clipping of cerebral aneurysms. Little is known regarding the usefulness of intraoperative MEP monitoring in endovascular aneurysm surgery. The purpose of this study was to validate the feasibility of intraoperative MEP monitoring during the coil embolization of anterior choroidal artery (AChA) aneurysms.

Methods

Clinical and angiographic data of consecutive patients who underwent coil embolization for unruptured AChA aneurysms with or without intraoperative MEP monitoring between January 2014 and December 2018 at our institute were abstracted and analyzed retrospectively.

Results

Twenty-three unruptured AChA aneurysms were treated. Eleven patients received MEP monitoring, and three of them experienced intraoperative reduction or disappearance of the MEP wave. Even during MEP changes, AChA filling showed no change in any of the three cases. Although one case with MEP monitoring encountered the disappearance of AChA filling, there was no change in MEP. This might be due to retrograde filling of the AChA from the anastomosis with the lateral posterior choroidal artery. AChA blood flow detected by angiography did not always reflect MEP status. When comparing the presence or absence of MEP monitoring, the volume embolization ratio of coiled aneurysms was significantly better in the MEP group.

Conclusion

Intraoperative MEP monitoring during endovascular coiling for AChA aneurysms may be feasible. AChA blood flow detected by angiography does not always reflect MEP status.

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Acknowledgements

We thank Editage (www.editage.jp) for English language editing.

Funding

No funding was received for this study.

Author information

Authors and Affiliations

  1. Department of Neuroendovascular Therapy, Kohnan Hospital, Sendai, Japan

    Akira Ito, Kenichi Sato, Hidenori Endo & Yasushi Matsumoto

  2. Department of Neurosurgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan

    Akira Ito, Kuniyasu Niizuma, Hidenori Endo & Teiji Tominaga

  3. Department of Neurosurgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan

    Kenichi Sato

  4. Department of Neurosurgical Engineering and Translational Neuroscience, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan

    Kuniyasu Niizuma

  5. Department of Neurosurgical Engineering and Translational Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan

    Kuniyasu Niizuma

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  1. Akira Ito
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  2. Kenichi Sato
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  3. Kuniyasu Niizuma
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Correspondence to Akira Ito.

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The authors report no conflicts of interest concerning the materials or methods used in this study or the findings specified in this paper.

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The institutional ethics committee approved this retrospective study, which was performed according to the principles of the Declaration of Helsinki.

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Ito, A., Sato, K., Niizuma, K. et al. Intraoperative motor-evoked potential monitoring during coil embolization for anterior choroidal artery aneurysms. Neuroradiology 64, 1221–1229 (2022). https://doi.org/10.1007/s00234-021-02847-z

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  • DOI: https://doi.org/10.1007/s00234-021-02847-z

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