Objective:To explore the acesodyne effect of ENTONOX (the mixed gas of nitric oxide 50% and oxygen 50%) on induced abortion.

• 目的:探讨ENTONOX气体(50%25一氧化氮和50%25氧气混合气体)在人工流产术中扩张宫颈及吸刮宫时的止痛效果。