4.5 Article

Incidence of obstetric anal sphincter injuries following breech compared to cephalic vaginal births

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BMC PREGNANCY AND CHILDBIRTH
卷 23, 期 1, 页码 -

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BMC
DOI: 10.1186/s12884-023-05595-5

关键词

Breech delivery; Obstetrical anal sphincter injuries; OASIs; OASI; Pelvic floor; Perineal injuries; Perineum

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This study aimed to evaluate the incidence of obstetric anal sphincter injuries (OASIs) following breech deliveries and compare it with cephalic presentation births. The results showed no significant difference in OASIs incidence between the breech and cephalic groups. Key message: Breech vaginal birth does not seem to be associated with a higher risk for obstetric anal sphincter injuries compared to a cephalic vaginal birth.
IntroductionObstetric anal sphincter injuries (OASIs) at the time of childbirth can lead to serious consequences including anal incontinence, dyspareunia, pain and rectovaginal fistula. These types of lesions and their incidence have been well studied after cephalic presentation deliveries, but no publications have specifically addressed this issue in the context of vaginal breech delivery. The goal of our study was to evaluate the incidence of OASIs following breech deliveries and compare it with cephalic presentation births.MethodsThis was a retrospective cohort study involving 670 women. Of these, 224 and 446 had a vaginal birth of a fetus in the breech (breech group) and cephalic (cephalic group) presentations respectively. Both groups were matched for birthweight (+/- 200 g), date of delivery (+/- 2 years) and vaginal parity. Main outcome of interest was to evaluate the incidence of OASIs following breech vaginal birth compared to cephalic vaginal births. Secondary endpoints were the incidence of intact perineum or first-degree tear, second-degree perineal tear and rates of episiotomies in each group.ResultsThere was no statistically significant difference in OASIs incidence between the breech and cephalic groups (0.9% vs. 1.1%; RR 0.802 (0.157; 4.101); p = 0.31). There were more episiotomies in the breech group (12.5% vs. 5.4%, p = 0.0012) and the rate of intact or first-degree perineum was similar in both groups (74.1% vs. 75.3%, p = 0.7291). A sub-analysis excluding patients with episiotomy and history of OASIs did not show any statistically significant difference either.ConclusionWe did not demonstrate a significant difference in the incidence of obstetric anal sphincter injuries between women who had a breech vaginal birth compared to cephalic. Key messageBreech vaginal birth does not seem to be associated with a higher risk for obstetric anal sphincter injuries compared to a cephalic vaginal birth.

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