Titration of Intravenous Oxytocin Infusion for Postdates Induction of Labor Across Body Mass Index Groups

Angela B. Maeder, Susan C. Vonderheid, Chang G. Park, Aleeca F. Bell, Barbara L. McFarlin, Catherine Vincent, C. Sue Carter

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Objective To evaluate whether oxytocin titration for postdates labor induction differs among women who are normal weight, overweight, and obese and whether length of labor and birth method differ by oxytocin titration and body mass index (BMI). Design Retrospective cohort study. Setting U.S. university-affiliated hospital. Participants Of 280 eligible women, 21 were normal weight, 134 were overweight, and 125 were obese at labor admission. Methods Data on women who received oxytocin for postdates induction between January 1, 2013 and June 30, 2013 were extracted from medical records. Oxytocin administration and labor outcomes were compared across BMI groups, controlling for potential confounders. Data were analyzed using χ2, analysis of variance, analysis of covariance, and multiple linear and logistic regression models. Results Women who were obese received more oxytocin than women who were overweight in the unadjusted analysis of variance (7.50 units compared with 5.92 units, p =.031). Women who were overweight had more minutes between rate changes from initiation to maximum than women who were obese (98.19 minutes compared with 83.39 minutes, p =.038). Length of labor increased with BMI (p =.018), with a mean length of labor for the normal weight group of 13.96 hours (standard deviation = 8.10); for the overweight group, 16.00 hours (standard deviation = 7.54); and for the obese group, 18.30 hours (standard deviation = 8.65). Cesarean rate increased with BMI (p =.001), with 4.8% of normal weight, 33.6% of overweight, and 42.4% of obese women having cesarean births. Conclusion Women who were obese and experienced postdates labor induction received more oxytocin than women who were non-obese and had longer length of labor and greater cesarean rates.

Original languageEnglish (US)
Pages (from-to)494-507
Number of pages14
JournalJOGNN - Journal of Obstetric, Gynecologic, and Neonatal Nursing
Volume46
Issue number4
DOIs
StatePublished - Jul 2017
Externally publishedYes

Keywords

  • BMI
  • fetal monitoring
  • intrapartum
  • labor
  • labor induction
  • labor outcomes
  • nurse
  • nursing intervention
  • obesity
  • oxytocin

ASJC Scopus subject areas

  • Pediatrics
  • Critical Care
  • Maternity and Midwifery

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