The analysis of related factors in perineal tear after vaginal delivery

Abstract

Objective To explore the relevant factors of maternal perineal tear after vaginal delivery. Methods A retrospective analysis of 1 322 cases of maternal perineal tear after a natural vaginal delivery in our hospital was done, and production times, the birth process, maternal age, newborn birth weight, the use of contractions reagent, fetal position, birth attendants work experience and other factors were analyzed. Results Second degree perineal tear in primipara was higher than that of second or more vaginal deliveries ( P ＜ 0. 05 );With the increase in newborn birth weight , the incidence of perineal tear was increased significantly ( P ＜ 0. 005 ); if birth attendants work experience was less than 5 years, the incidence of maternal perineal tear of vaginal delivery was significantly higher ( P ＜ 0. 005 ); urgent production did not increase the incidence of perineal tear, but there was significant difference in the proportion in different degrees of tear (P＜0.05 ); maternal age and the use of contractions reagent did not increase the incidence of perineal tear (P ＞ 0. 05 ) . Conclusions Primipara, newborn birth weight, the lack of work experience of birth attendants are the main factors of perineal tear after vaginal delivery. As long as enhancing learning, improving their technical level, prenatal preparation, observing carefully during porduction, detecting unusual circumstances in time, mastering the surgical indications for midwifery strictly, selecting the appropriate mode of delivery could reduce the incidence of perineal tear. Key words: Vaginal delivery; Perineal tear; Risk factors