Selesnick S H, Carew J F, Victor J D, Heise C W, Levine J
Department of Otorhinolaryngology, The New York Hospital- Cornell University Medical Center, 10021, USA.
Laryngoscope. 1996 May;106(5 Pt 1):633-8. doi: 10.1097/00005537-199605000-00022.
The predictive value of intraoperative stimulation thresholds for facial nerve function, using a constant-current system, was examined in 49 patients undergoing resection of cerebellopontine-angle tumors. Immediately after surgery, 75% of the 0.1-mA threshold group, 42% of the 0.2-mA group, and 18% of the 0.3-mA or greater group had good (grade I or II) facial nerve function. One year after surgery, 90% of the 0.1-mA group, 58% of the 0.2-mA group, and 41% of the 0.3-mA or greater group had grade I or II function. A statistically significant breakpoint of 0.2 mA was found to predict good postoperative facial function. Delayed facial paralysis occurred in 22% of patients, but the prognosis for these patients was favorable. Both current stimulation threshold and duration are necessary for a meaningful comparison of data between investigators.
采用恒流系统，对49例接受桥小脑角肿瘤切除术的患者术中面神经功能刺激阈值的预测价值进行了研究。术后即刻，0.1毫安阈值组的75%、0.2毫安组的42%以及0.3毫安及以上组的18%患者具有良好（I级或II级）面神经功能。术后一年，0.1毫安组的90%、0.2毫安组的58%以及0.3毫安及以上组的41%患者具有I级或II级功能。发现0.2毫安这一具有统计学意义的断点可预测术后良好的面神经功能。22%的患者发生了迟发性面瘫，但这些患者的预后良好。对于研究者之间的数据有意义的比较而言，电流刺激阈值和持续时间两者都是必要的。
