目的 分析死胎死亡原因及可能的相关因素，为降低死胎发生的措施提供依据。 方法 对2007年1月－2011年12月住院分娩的609例死胎（≥28周） 的病例资料进行回顾性分析,包括对产检次数差异、死胎性别、死胎孕周分布、母亲年龄差别、母亲文化程度等进行统计分析。 结果 ① 死胎的原因依次为：胎儿因素（41.2%），母体因素（24.1%），胎盘因素（21.7%）及不明原因（13.0%）；其中胎儿畸形、重度子痫前期及胎盘早剥为主要原因；② 母亲的文化程度低、未建卡或未正规产检者死胎发生的几率高于正规产检者，差异有统计学意义（P＜0.05）。 结论 加强围产保健，早期筛查胎儿畸形、防治妊娠期并发症及合并症等都有助于降低死胎的发生率。
【Abstract】 Objective To observe the effects of scoliosis on pulmonary function. Methods 31 cases of scoliosis were included and underwent pulmonary function test ( PFT) . The cases were divided into an adolescent group ( 16 cases) and an adult group ( 15 cases) according to age. Predicted value was used as a reference to assess various PFT parameters. Results In both groups, forced expiratory volume in one second, forced vital capacity, and pulmonary diffusion decreased. In the adolescent group, residual volume,functional residual volume, and total lung capacity decreased. In the adult group, vital capacity and maximal voluntary ventilation decreased, the ratio of forced expiratory volume in one second to forced vital capacity decreased, and resonance frequencies increased significantly compared with the adolescent group ( P lt; 0. 05) . Conclusion Scoliosis may lead to restrictive ventilation defect, which is mainly lung volume reduction in adolescent patients and more severe in adult patients.