结果：29例均取得减少手术中出血、操作容易、缩短手术时间的效果。
Results: the intraoperative bleeding was reduced and operative time shortened in all the 29 cases.
颅底异位脑膜瘤较硬脑膜内者血运差，手术中出血量不多，一般不需动脉结扎或动脉栓塞。
The ectopic meningioma on skull base has less blood supply than intradural meningioma, and less hemorrhage, so the artery does not need to be ligated or embolized during the operation.
结论运用超声刀行前臂皮瓣制备术，可以缩短手术时间、减少手术中出血量，可在临床推广应用。
Conclusion: Harmonic Scalpel using can significantly reduce the operation time and intraoperative bleed loss volume. It is worth of clinical promotion.
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