1799年的一天,正在经受牙痛折磨的英国化学家戴维,走进了一间充满一氧化二氮(俗名“笑气”)气体的房间,他惊奇地发现自己的牙痛霍然消失了。这件事引起了美国牙科大夫韦尔斯的兴趣,他猜想一氧化二氮可能有麻醉作用。于是,他以自己做实验,吸入“一氧化二氮”后,再请医生帮他拔牙。果然,一点疼痛的感觉都没有。1845年1月,韦尔斯在波士顿一家医院公开表演一氧化二氮麻醉下的无痛拔牙手术。遗憾的是,由于麻醉不足,手术过程中病人突然苏醒,疼得大喊大叫。一时间,人们把韦尔斯当作骗子,将他赶出了医院。韦尔斯 One day in 1799, David, a British chemist who was suffering from toothache, went into a room full of nitrous oxide gas (“naughty” gas), and was surprised to find that his toothache disappeared. This incident aroused the interest of the United States dentist Wells, who speculated that nitrous oxide may have an anesthetic effect. So, he made his own experiment, inhaled “nitrous oxide”, then ask a doctor to help him tooth extraction. Sure enough, no feeling of pain. In January 1845, Wells publicly performed painless tooth extraction under nitrous oxide anesthesia at a Boston hospital. Unfortunately, due to lack of anesthesia, patients suddenly awake during surgery, pain screaming. For a time, Wells as a liar, driven him out of the hospital. Wells