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Factors associated with obstetric anal sphincter injuries during vacuum delivery among Chinese women
Objective To investigate factors associated with obstetric anal sphincter injuries (OASIS) during vacuum delivery among Chinese women. Methods A retrospective cohort study of Chinese women who underwent vacuum‐assisted vaginal delivery at a tertiary referral hospital in Taiwan between January 2010 a...
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Published in: | International journal of gynecology and obstetrics 2019-06, Vol.145 (3), p.354-360 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Objective
To investigate factors associated with obstetric anal sphincter injuries (OASIS) during vacuum delivery among Chinese women.
Methods
A retrospective cohort study of Chinese women who underwent vacuum‐assisted vaginal delivery at a tertiary referral hospital in Taiwan between January 2010 and December 2016. Logistic regression analysis was used to compare various factors (maternal, delivery, and neonatal factors) between women with and those without OASIS.
Results
Among 18 744 Chinese women with singleton vaginal delivery, 3141 (16.76%) had vacuum assistance and 2634 (83.86%) were primiparous. Of the women who had a vacuum delivery, 1073 (34.16%) sustained OASIS, of whom 967 (90.12%) were primiparous. The major independent risk factors for OASIS were primiparity (adjusted odds ratio [aOR], 2.93; 95% confidence interval [CI], 2.29–3.76) and use of midline episiotomy (aOR, 3.01; 95% CI, 1.74–5.17). However, epidural analgesia had a protective effect (aOR, 0.64; 95% CI, 0.54–0.75) against OASIS. In multivariate analysis for the primiparous subgroup, the independent significant risk factors for OASIS remained the same.
Conclusion
A high incidence of OASIS during vacuum delivery was observed among Chinese women. Midline episiotomy was found to be a modifiable risk factor for OASIS, whereas epidural analgesia had a protective effect.
Midline episiotomy was found to be a modifiable risk factor, whereas epidural analgesia had a protective effect against obstetric anal sphincter injuries among Chinese women. |
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ISSN: | 0020-7292 1879-3479 |
DOI: | 10.1002/ijgo.12813 |