2Leung NY, Lau AC, Chan KK, et al. Clinical characteristics and outcomes of obstetric patients admitted to the Intensive Care Unit: A 10-year retrospective review[ J]. Hong Kong Med J,2010, 16: 18- 25.
3Vasquez DN, Estenssore E, Canales HS, et al. Clinical characteristics and out-comes of obstetric patients requiring ICU admission [ J 1. Chest, 2007,131 : 718-724.