高血压病人手术前虽经抗高血压治疗，但因治疗不够充分，术中各种刺激，其心血管反应仍明显增强。口腔外科由于手术和麻醉的特殊性，术中刺激、移动体位等都可引起血压升高，并易导致体循环阻力和心肌耗氧量增加，心排量降低，威胁术中病人安全，因此选择效果确切，使用方便的 Hypertensive patients despite antihypertensive treatment before surgery, but due to inadequate treatment, intraoperative various stimuli, the cardiovascular response was significantly enhanced. Oral surgery due to the special nature of surgery and anesthesia, intraoperative stimulation, such as mobile position can cause high blood pressure and easily lead to increased systemic vascular resistance and myocardial oxygen consumption, cardiac output decreased, threatening intraoperative patient safety, so the choice of effect Exact, easy to use