Francois Karrie, Mayer Staci, Harris Cathleen, Perlow Jordan H
Department of Maternal-Fetal Medicine, Good Samaritan Regional Medical Center, 1111 East McDowell, Phoenix, AZ 85006, USA.
J Reprod Med. 2003 Oct;48(10):771-4.
To evaluate whether vasa previa at delivery is associated with a history of second-trimester placenta previa.
Retrospective, case-control study of all vasa previa cases at Good Samaritan Regional Medical Center from January 1, 1991, to May 1, 2001. Cases were identified by ICD-9 codes and confirmed by chart review. Each case was matched in a 1:4 ratio with controls based upon normal placentation at delivery, ultrasound documentation of midtrimester placental location, maternal parity and gestational age at delivery.
During the study period, 13 cases of vasa previa were identified. Nine cases (9/13, 69.2%) of vasa previa at delivery had a second-trimester placenta previa as documented by midtrimester ultrasonography, whereas 2 controls (2/52, 3.8%) had a second-trimester placenta previa (P < .000001, OR = 56.3, 95% CI = 8.9-354.1).
There is a highly significant association between vasa previa at delivery and a history of second-trimester placenta previa.
评估分娩时前置血管是否与孕中期前置胎盘病史相关。
对1991年1月1日至2001年5月1日在撒玛利亚地区医疗中心所有前置血管病例进行回顾性病例对照研究。通过国际疾病分类第九版（ICD - 9）编码识别病例，并经病历审查确认。根据分娩时胎盘位置正常、孕中期胎盘位置的超声记录、产妇产次及分娩时孕周，将每个病例与对照组按1:4的比例进行匹配。
在研究期间，共识别出13例前置血管病例。分娩时前置血管的9例（9/13，69.2%）有孕中期超声记录的前置胎盘，而2例对照组（2/52，3.8%）有孕中期前置胎盘（P <.000001，OR = 56.3，95%可信区间 = 8.9 - 354.1）。
分娩时前置血管与孕中期前置胎盘病史之间存在高度显著的关联。
