• Van Tri Truong, Minh Quan Ngo, Duy Phan, Hung Le, and Ngoc Anh Tran Hoang.
• Department of Neurosurgery, Vinmec Central Park International Hospital, Vinmec Healthcare system, Ho Chi Minh City, Vietnam. Electronic address: drtruongtri@gmail.com.
• World Neurosurg. 2024 May 1; 185: e461e466e461-e466.

BackgroundIntraoperative neuroelectrophysiology monitoring (IONM) has been used to decrease complications and to increase the successful rate of microvascular decompression (MVD) MVD for hemifacial spasm (HFS). Still, it is not available at limited resource centers. We report the outcome of patients undergoing MVD for HFS without using IONM.MethodsThe variables concerning the patients' demographics (age and gender), clinical characteristics, offending vessels (vertebral artery type and non-vertebral artery type), postoperative grade of HFS, and postoperative complications of HFS patients undergoing MVD were retrospectively reviewed and collected. The scoring system provided by the Japan Society for MVD was used to evaluate the postoperative outcome of HFS. Postoperative hearing ability was evaluated according to a subjective assessment of the patients.ResultsA total of 228 patients were recruited. Their median age was 51.0 (44.0-57.0) years old. The total cure effect was observed in 207 (90.8%) patients within the first week after the surgery and in 200 (96.1%) patients in a 2-year follow-up. Permanent hearing disturbance happened in 2 patients (0.9%). No patient had permanent unilateral deafness (0%). No postoperative permanent facial paralysis was reported.ConclusionsMVD without IONM may be performed safely and effectively to treat patients with HFS.Copyright © 2024 Elsevier Inc. All rights reserved.

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