Feasibility of intraoperative motor-evoked potential monitoring for skull base tumors with a high risk of postoperative motor deterioration

Kimiaki Hashiguchi, Takato Morioka, Fumiaki Yoshida, Koji Yoshimoto, Tadahisa Shono, Yoshihiro Natori, Shinji Nagata, Tomio Sasaki

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Objective: To establish the validity and utility of motor-evoked potential (MEPs) monitoring for skull base tumor resection, we explored the relationship between MEP monitoring results and postoperative motor function. Methods: MEPs were successfully monitored during 76 operations in 68 patients with a high risk of motor morbidity. MEP monitoring data were correlated with perioperative clinical motor function. Results: MEPs remained stable in 56 operations (73.7%), and no postoperative motor deterioration was observed. Transient or permanent deterioration of MEPs (<50% of the initial amplitude before surgery) occurred in 20 operations (26.3%). This deterioration was reversible after intervention in seven cases (9.2%). Irreversible deterioration in MEPs was seen in 13 cases (17.1%). In five cases, the final amplitude was greater than 10%. Two of these patients experienced transient loss of MEPs and moderate to severe hemiparesis. Both patients showed full recovery within 6 months after the operation. The other three patients experienced no postoperative worsening of motor function. The final MEP amplitude was less than 10% in the other eight patients, including five with permanent MEP loss. All of these patients experienced severe postoperative motor dysfunction. Recovery of motor function was worse in most participants in this group compared with those in the other groups. Conclusion: Intraoperative MEP monitoring is a valid indicator of pyramidal tract pathway function for skull base tumor surgery.

本文言語英語
ページ(範囲)1191-1200
ページ数10
ジャーナルActa Neurochirurgica
153
6
DOI
出版ステータス出版済み - 6 2011

All Science Journal Classification (ASJC) codes

  • 外科
  • 臨床神経学

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