一氧化氮(N_2O)是一种古老的止痛和抗焦虑药物,其止痛机理尚未明确。可乐定则是一种主要激活α_2肾上腺素能药物,主要用于治疗高血压。由于其具有止痛和抗焦虑作用,学者们认为它对已麻醉患者是有利的。本文目的是评价可乐定对接受30％N_2 O麻醉者面部触觉和痛觉的影响。 作者将43位志愿者随机分为4组:Ⅰ组10位,接受100％氧加安慰剂,Ⅱ组6位接受30％N_2O,Ⅲ组11 Nitric oxide (N2O) is an ancient analgesic and anti-anxiety drug whose analgesic mechanism is not yet known. Colamin, a major active alpha-2 adrenergic, is mainly used to treat high blood pressure. Because of its analgesic and anti-anxiety effects, academics consider it beneficial for patients who have already been anesthetized. The purpose of this article is to evaluate the effects of clonidine on facial tactile and pain perception in 30% N 2 O anesthesia. Forty-three volunteers were randomized into four groups: Group I 10, received 100% oxygen plus placebo, Group II 6 received 30% N2O, Group III 11