诱导性降压麻醉(IHA)用于正颌外科的效果尚无定论。作者的研究发现IHA可以减少术中出血、改善手术野质量。 患者和方法 采用前瞻性、随机、整群、分层、单盲方式研究50例青少年正颌外科患者,年龄13～15岁。患者接受的手术是下颌升支矢状骨劈开术,Le Fort Ⅰ型截骨术、颏成形术。25例患者采用诱导性降压麻醉,另外25例术中不特意降压。首先根据将施行的手术种类将患者分层、分群,然后随机分配到实验组和对照组。所有患者都用标准化的麻醉技术。静脉应用诱导 Induction of antihypertensive anesthesia (IHA) for orthognathic surgery, the effect is not conclusive. The authors study found that IHA can reduce intraoperative bleeding, improve the quality of the surgical field. Patients and Methods A prospective, randomized, cluster, stratified, single-blind study of 50 patients with orthognathic surgery in young patients, aged 13 to 15 years. The patient underwent surgery for sagittal split ramus, Le Fort Ⅰ osteotomy, genioplasty. Twenty-five patients received induction antihypertensive anesthesia, and the other 25 patients were not hypotensive. Patients were first stratified, grouped according to the type of surgery to be performed and then randomized to experimental and control groups. All patients used standardized anesthesia techniques. Induction of intravenous use