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Perineal lacerations during spontaneous vaginal delivery
K Bodner1, B Bodner-Adler, P Wagenbichler
1Departments of Gynecology & Obstetrics, University of Vienna Medical School, Vienna, Austria.
Wiener Klinische Wochenschrift
|November 22, 2001
Summary
Low parity, advanced maternal age, and larger infant head size increase perineal laceration risk during vaginal delivery. Episiotomy did not prevent severe tears in this study.
Area of Science:
- Obstetrics and Gynecology
- Perinatal Care
- Maternal Health
Background:
- Perineal lacerations are common complications of vaginal delivery.
- Understanding risk factors is crucial for prevention and management.
Purpose of the Study:
- To determine the incidence of perineal tears during spontaneous vaginal birth.
- To identify and analyze risk factors associated with perineal lacerations.
Main Methods:
- Retrospective analysis of obstetric data from two Viennese hospitals (February-July 1999).
- Inclusion criteria: uncomplicated pregnancies, spontaneous vaginal deliveries, cephalic presentation, gestational age > 37 weeks.
- Statistical analysis using logistic regression models (univariate and multivariate).
Main Results:
- 36.2% of 1009 women experienced perineal lacerations (18.1% first-degree, 15.2% second-degree, 2.9% third-degree).
- Independent risk factors for any laceration: low parity, absence of episiotomy, large infant head diameter, and advanced maternal age.
- Risk factors for third-degree tears included primiparity, episiotomy use, prolonged second stage of labor, large infant head diameter, and oxytocin use.
Conclusions:
- Primiparous women delivering larger infants face a higher risk of severe perineal tears.
- Episiotomy was not found to be protective against severe perineal lacerations in this cohort.