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Association between obstetrical anal sphincter injury and postpartum urinary retention: a contemporary nationwide

Jocelyn Stairs1,2, Daniel L Rolnik3, Dante Pascali4

  • 1Department of Obstetrics and Gynecology, Dalhousie University, 5850/5980 University Avenue, P.O. Box 9700, Halifax, NS, B3K 6R8, Canada. jocelyn.stairs@dal.ca.

International Urogynecology Journal
|September 13, 2022
PubMed

Insights

Obstetrical anal sphincter injuries (OASIS) significantly increase the risk of postpartum urinary retention after vaginal birth. This complication also leads to longer hospital stays and higher admission costs.

Area of Science:

  • Obstetrics and Gynecology
  • Urology
  • Public Health

Background:

  • Postpartum urinary retention requires prompt management to prevent long-term complications.
  • Obstetrical anal sphincter injuries (OASIS) are a potential risk factor for postpartum urinary retention.

Purpose of the Study:

  • To determine the association between OASIS and postpartum urinary retention.
  • To compare hospital stay length and admission costs for patients with and without postpartum urinary retention.

Main Methods:

  • Population-based retrospective cohort study using the National Inpatient Sample (NIS) database.
  • Inclusion of over 2 million vaginal delivery admissions.
  • Multivariate logistic regression and simple linear regression analyses.

Main Results:

  • 2.34% of deliveries sustained OASIS, and 0.27% experienced postpartum urinary retention.
  • OASIS was associated with 3.60 times the odds of postpartum urinary retention.
  • Postpartum urinary retention correlated with longer hospital stays (2.94 vs. 2.28 days) and increased admission costs (1.37 times higher).

Conclusions:

  • Obstetrical anal sphincter injuries are significantly associated with increased odds of postpartum urinary retention.
  • OASIS poses a considerable risk for developing postpartum urinary retention, necessitating focused clinical attention.
Abstract

Keywords:
Bladder dysfunctionObstetrical anal sphincter injuryPostpartumRisk factorsUrinary retentionVoiding dysfunction

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