第二期（完全扩张）剖宫产的发生率及其最佳表现方式：一项多中心分析。
Incidence of second-stage (fully dilated) cesarean sections and how best to represent it: A multicenter analysis.
机构信息
St Mary's Hospital, Imperial College NHS Trust, London, UK.
West Middlesex Hospital, Chelsea and Westminster NHS Trust, London, UK.
出版信息
Int J Gynaecol Obstet. 2022 Jan;156(1):119-123. doi: 10.1002/ijgo.13672. Epub 2021 Apr 4.
OBJECTIVE
To gather multicenter data on the incidence of second-stage cesarean sections and suggest alternative methods by which the data can be represented.
METHODS
Retrospective, observational study over a 12-month study period. Numbers of term, singleton live births were collated from each of six maternity units. Data were separated by mode of delivery-unassisted vaginal birth, assisted (instrumental) vaginal delivery and elective, first-stage, and second-stage cesarean sections. Second-stage cesarean sections were expressed as a proportion of all deliveries, of all laboring women (i.e. excluding elective cesarean sections), and all women who reach full dilatation (i.e. excluding elective and first-stage cesarean sections).
RESULTS
Of the 28 867 deliveries included in the analysis, 493 of these were second-stage cesarean sections. This represented an incidence of 1.7% of all deliveries, 2.0% of all women in labor, and 2.5% of all women who reach full dilatation.
CONCLUSION
Second-stage cesarean sections continue to be common. Safe delivery of a deeply impacted fetal vertex is essential in modern obstetric practice.
目的
收集多中心关于第二阶段剖宫产发生率的数据，并提出替代方法来表示这些数据。
方法
回顾性观察性研究，研究时间为 12 个月。从六个产科单位中收集每个单位足月、单胎活产的数量。数据按分娩方式（非辅助阴道分娩、辅助（器械）阴道分娩和选择性、第一阶段和第二阶段剖宫产）进行分类。第二阶段剖宫产的比例分别为所有分娩、所有临产妇女（即不包括选择性剖宫产）和所有达到完全扩张的妇女（即不包括选择性和第一阶段剖宫产）。
结果
在分析中纳入的 28867 次分娩中，有 493 次为第二阶段剖宫产。这代表所有分娩的发生率为 1.7%，所有临产妇女的发生率为 2.0%，所有达到完全扩张的妇女的发生率为 2.5%。
结论
第二阶段剖宫产仍然很常见。在现代产科实践中，安全分娩深度嵌顿的胎头至关重要。
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