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  • Title: A proposal for standardized analysis of the results of microvascular decompression for trigeminal neuralgia and hemifacial spasm.
    Author: Kondo A, Date I, Endo S, Fujii K, Fujii Y, Fujimaki T, Hasegawa M, Hatayama T, Hongo K, Inoue T, Ishikawa M, Ito M, Kayama T, Kohmura E, Matsushima T, Munemoto S, Nagahiro S, Ohno K, Okamura T, Ryu H, Shigeno T, Shirane R, Tagusagawa Y, Tanabe H, Yamada K, Yamakami I.
    Journal: Acta Neurochir (Wien); 2012 May; 154(5):773-8. PubMed ID: 22327325.
    Abstract:
    BACKGROUND: The purpose of this study was to evaluate and analyze overall postoperative results from microvascular decompression (MVD) by combining the cure rate of symptoms with the complication rate. A new scoring system for obtaining objective surgical results from MVD for trigeminal neuralgia (TN) and hemifacial spasm (HFS) is proposed to document treatment results using consistent criteria in a standardized manner. METHOD: Surgical results combining complications , if any, were obtained from a questionnaire sent to patients who had undergone surgery for TN or HFS in recent years and had been followed-up for more than 1 year after surgery (TN patients, n = 54; HFS patients, n = 81) When surgical outcome is complete resolution of symptoms, the efficacy of surgery (E) is designated E-0, but when moderate symptoms are still persist postoperatively, the score is designated E-2. When no complications are seen after surgery, the complication score (C) is C-0, while the score is C-2 if troublesome complications remain. In addition, total evaluation of the results (T) is judged by combining the E and C scores. For example, when E is 0, and C is C-2, the total evaluation is scored as T-2, which is diagnosed as fair. FINDINGS: The response rate of the questionnaire was 80.7% (109/135). Overall surgical data were evaluated and analyzed using our new scoring system. Analysis of the collected data revealed an outcome of T-0 was 70% (35/50 patients) and T-1 was 24% (12/50) and T-2 was 6% (3/50) in TN, whereas in HFS, T-0 was 61% (36/59) and T-1 was 27.1% (16/59) and T-2 was 6.8% (4/59) and T-3 was 5.1% (3/59). CONCLUSION: The total results of MVD should be evaluated and analyzed by combining the cure rate of symptoms together with the complication rate. This new scoring system could allow much more objective analysis of the results of following MVD. Adopting this scoring system to objectively judge treatment results for TN and HFS, individual surgeons can compare their own overall surgical results with those of other institutes. Comparative results of MVD can also be provided to patients considering therapy to allow informed decision-making on the basis of good quality evidence.
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