宫腔镜检查时使用笑气的护理及镇痛效果评价
方琳
Nursing of nitrous oxide in hysteroscopy and its evaluation of analgesic effect
FANG Lin
中国临床护理 . 2009, (2): 114 -116 .  DOI: 10.3969/j.issn.1674-3768.2009.02.013