笑气清醒镇静镇痛与丙泊酚静脉麻醉用于胃镜检查的临床价值比较研究
소기청성진정진통여병박분정맥마취용우위경검사적림상개치비교연구
A comparitive study between conscious sedation by nitrous oxide inhalation and intravenous sedation with propofol for upper gastrointestinal endoscopy
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