分娩是由产力、产道及胎儿三大因素所决定,其中单一因素严重异常或三因素相对异常且相互影响可导致梗阻性难产发生。梗阻性难产可引起胎儿缺氧、胎儿窘迫,新生儿窒息、产伤等,并且增加手术产机会,使围生儿病率和死亡率增加。1胎儿窘迫发生梗阻性难产时,产程延长,胎头受压时间长 Childbirth is determined by the three major factors of labor force, birth canal and fetus, of which a single serious anomaly or three factors are relatively abnormal and can lead to obstructive dystocia. Obstructive dystocia can cause fetal hypoxia, fetal distress, neonatal asphyxia, birth trauma, etc., and increase the chances of surgical production, perinatal morbidity and mortality increased. 1 fetal distress obstructive dystocia, prolonged labor, fetal head pressure for a long time