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Am J Perinatol 2024; 41(S 01): e3183-e3186
DOI: 10.1055/a-2211-1928
Short Communication

Mode of Delivery and Obstetric Complications in the Setting of Prior Uterine Surgery

Margaret H. Bogardus
1   Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York
,
Alexander M. Friedman
2   Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York
,
Chetna Arora
3   Division of Minimally Invasive Gynecologic Surgery, Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York
,
Mary E. D'Alton
2   Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York
,
Timothy Wen
4   Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of California San Francisco, San Francisco, California
› Author Affiliations Funding M.E.D. had a senior leadership role in ACOG II's Safe Motherhood Initiative which received unrestricted funding from Merck for Mothers. A.M.F. is supported by funding from the Eunice Kennedy Shriver National Institute of Child Health and Human Development (1R01HD104943); however, this funding was not used to support this research.
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Abstract

Objective This study aimed to evaluate cesarean rates and risk for obstetric complications among deliveries with a history of prior uterine surgery.

Study Design This serial cross-sectional study analyzed deliveries with and without prior uterine surgery in the 2016–2019 Nationwide Inpatient Sample. Unadjusted and adjusted logistic regression models were performed to assess risk of nontransfusion severe maternal morbidity (SMM) and other obstetric complications based on the presence or absence of prior uterine surgery with unadjusted and adjusted odds ratios (aORs) with 95% confidence intervals (CIs) as measures of association. Adjusted models accounted for demographic, hospital, and delivery factors. Demographics and clinical factors among deliveries with and without a prior history of uterine surgery diagnosis were compared with the chi-square test with p < 0.05 considered statistically significant.

Results Of 14.7 million delivery hospitalization identified, 6,910 (4.7 per 10,000) had a history of uterine surgery and 111,710 (0.76%) experienced SMM. Women with prior uterine surgery were more likely to be older, to be of unknown race or ethnicity, and to have private insurance (p < 0.01 for all). Eighty-five percent of deliveries with prior uterine surgery were performed by cesarean compared with 32% of deliveries without prior uterine surgery (p < 0.01). In adjusted analysis, compared with patients without prior uterine surgery, patients with prior uterine surgery were not at increased risk for SMM (aOR 1.23, 95% CI 0.73–2.07). Evaluating obstetric complications, patients with prior uterine surgery had a decreased risk of postpartum hemorrhage (aOR 0.64, 95% CI 0.43–0.96) and an increased risk of peripartum hysterectomy (aOR 4.12, 95% CI 1.75–9.67), and no difference in other obstetric complications assessed.

Conclusion These findings suggest that current clinical practice results in similar delivery risks among patients with compared with without prior uterine surgery.

Key Points

  • Risk for most adverse outcomes is similar among patients with prior uterine surgery.

  • Risk for peripartum hysterectomy was higher with prior uterine surgery.

  • Risk for SMM was not higher with prior uterine surgery.

Keywords

maternal morbidity - obstetric complications - uterine scar - uterine surgery

Note

This work was presented as a poster at the 43rd Annual Pregnancy Meeting, Society for Maternal Fetal Medicine, San Francisco, CA, February 6–11, 2023.




Publication History

Received: 02 October 2023

Accepted: 10 November 2023

Accepted Manuscript online:
15 November 2023

Article published online:
15 December 2023

© 2023. Thieme. All rights reserved.

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