不同分娩方式下胎头变形程度分析.

Objective To analyze the presence of fetal deformation inconsistencies in different mode of delivery through evaluating the value of ultrasonography during the diagnosis of Cephalic presentation dystocia， and provide a theoretical guide to early identify Cephalic presentation dystocia with the proper usage of ultrasound. Methods In the study，through a case-control design，total term maternal 260 cases were selected from the Second People's Hospital of Yunnan Province from July 2015 to October 2016 deliveries which were normal pelvis. These pregnant women were measured by LaborPro Delivery monintoring system's noninvasive monitoring. Among those cases excluding fetal distress and social factors，there were 149 cases of natural childbirth，46 cases of forceps deliveries and 65 cases of caesarean birth. Comparing the difference of the related indicators such as fetal biparietal diameter，head circumference in three groups' data, the paper assessed the value and limitations of ultrasonography for identifying Cephalic presentation dystocia, and analyzed possible reasons of its limitations．Results In these ultrasound indicators， there were significant differences of BPD， head circumference, upper abdominal circumference values between Dystocia group and Natural childbirth group(P<0.05) . B-ultrasonic indicators of biparietal diameter，head circumference provided valuable prediction for dystocia prediction. Natural childbirth， forceps deliveries and cesarean birth, there were some differences of BPD and the head circumference changing of the amplitude(P<0.05) . Conclusions The ultrasound can not be completely as a basis for judging cephalopelvic disproportion. This study shows that the presence of fetal deformation inconsistencies in different mode of delivery. Therefore，Clinical evaluation of head-position dystocia requires comprehensive use of ultrasound and other relevant clinical examinations. [ABSTRACT FROM AUTHOR]