Ou X, Chen X, Su J
Guangzhou Second People's Hospital.
Zhonghua Fu Chan Ke Za Zhi. 1997 Jun;32(6):329-32.
To investigate the effect on correction of occipito-posterior (OP) presentation by changing maternal posture during labor.
A prospective study was conducted in 120 pregnant women from March 1994 to December 1995. Women in labor were instructed to take the lateral posture so that the resultant force of the gravity of the fetus, the buoyancy of amniotic fluid, and the intermittent uterine contraction may change the fetal position from occipito-posterior into occipito-anterior (OA) presentation. Another 120 women were selected as controls.
(1) In the study group, 106 women (88.3%) delivered vaginally with fetal presentation changed from OP into OA, and 14 (11.7%) received cesarean section. In the control group, only 20 women (16.7%) delivered vaginally, and 100 (83.3%) had cesarean sections (P < 0.001). (2) The average time interval in the study group was 302.6 min for the first stage and 59.8 min for the second stage, whereas 483.7 min and 156.1 min respectively in the controls. A significant difference was noted (P < 0.01).
It is an effective method for the mother to take the lateral posture on the same side of the fetal spine for correcting the OP position. The incidence of dystocia may be reduced as well as the cesarean section rate. The method in simple and effective, and can be used in most of hospitals.
探讨分娩过程中改变产妇体位对枕后位（OP）矫正的影响。
1994年3月至1995年12月对120例孕妇进行前瞻性研究。指导分娩中的产妇采取侧卧位，使胎儿重力、羊水浮力和子宫间歇性收缩的合力改变胎儿位置，从枕后位转为枕前位（OA）。另选120例妇女作为对照。
（1）研究组中，106例妇女（88.3%）经阴道分娩，胎儿体位从枕后位转为枕前位，14例（11.7%）接受剖宫产。对照组中，仅20例妇女（16.7%）经阴道分娩，100例（83.3%）行剖宫产（P<0.001）。（2）研究组第一产程平均时间间隔为302.6分钟，第二产程为59.8分钟，而对照组分别为483.7分钟和156.1分钟。差异有统计学意义（P<0.01）。
产妇采取胎儿脊柱同侧的侧卧位是矫正枕后位的有效方法。可降低难产发生率及剖宫产率。该方法简单有效，可在大多数医院应用。
