Annapoorna V, Arulkumaran S, Anandakumar C, Chua S, Montan S, Ratnam S S
Department of Obstetrics and Gynaecology, National University Hospital, Singapore.
Int J Gynaecol Obstet. 1997 Oct;59(1):13-8. doi: 10.1016/s0020-7292(97)00178-1.
This study compared the obstetric outcome in women who had external cephalic version (ECV) for breech presentation after 36 weeks gestation with those who did not, to see whether ECV reduces breech deliveries and cesarean section rates with reduced complications.
External cephalic version was attempted in 200 women (study group) with the use of tocolysis and vibroacoustic stimulation. The control group (ECV not attempted) comprised of 278 women with breech presentation after 36 weeks.
The cesarean section rate was 14.0% in the successful version group compared with 55.2% in the unsuccessful version group. The overall cesarean section rate in the study group was 32.5%. In the control group of 278, the fetus remained in the breech presentation in labor in 269 women with a cesarean section rate of 51.4% which was not different from the unsuccessful version group (55.2%).
This study supports the randomized trials conducted earlier in that ECV after 36 weeks gestation reduced the number of breech deliveries and cesarean sections (32.5% in the study group compared with 51.4% in the control group) (P > 0.00001).
本研究比较了妊娠36周后因臀位行外倒转术（ECV）的女性与未行该手术的女性的产科结局，以观察ECV是否能降低臀位分娩和剖宫产率，并减少并发症。
对200名女性（研究组）使用宫缩抑制剂和振动声学刺激进行外倒转术尝试。对照组（未尝试ECV）由278名妊娠36周后臀位的女性组成。
成功倒转组的剖宫产率为14.0%，未成功倒转组为55.2%。研究组的总体剖宫产率为32.5%。在278名对照组女性中，269名女性分娩时胎儿仍为臀位，剖宫产率为51.4%，与未成功倒转组（55.2%）无差异。
本研究支持早期进行的随机试验，即妊娠36周后行ECV可减少臀位分娩和剖宫产的数量（研究组为32.5%，对照组为51.4%）（P>0.00001）。
