The impact of active delivery of the anterior arm during vacuum-assisted vaginal delivery on perineal tears: a clinical practice evaluation.

Objective

Our purpose was to evaluate the impact of active delivery of the anterior arm with Couder's Maneuver (CM) during vacuum-assisted vaginal delivery (VAVD) on perineal tears. This maneuver can be beneficial because it has the advantage of reducing fetal biacromial diameter.

Methods

This monocentric retrospective study compared two non-concurrent cohorts of nulliparous women before and after implementation of a systematic CM during VAVD: Cohort 1 from 1 January to 31 December 2006 without CM and Cohort 2 from 1 January to 31 December 2016 with systematic CM. This study reviewed all births during these two periods. All live-born singleton pregnancies where VAVD occurred after 37 weeks of gestation were included. The principal endpoint was the type of perineal tear.

Results

In total, there were 179 VAVD in the Cohort 1 and 267 VAVD in the Cohort 2. In the Cohort 2, 233 VAVD (87.3%) were performed with systematic CM. No episiotomy was performed in both cohorts. There was a significant decrease in the rate of second-degree perineal tears between the two cohorts (42.4 versus 15%, p < .001) and a significant increase in the rate of intact perineum (34.1 versus 54.7%, p < .001). There was no influence of CM on the rate of obstetrical anal sphincter injury (3.9 versus 2.6%, p = .44).

Conclusions

Practicing this maneuver could improve the perineal prognosis during VAVD in nulliparous women.