title: Cervical ripening with transcervical foley catheter and the risk of uterine rupture.
abstract: OBJECTIVE
  To estimate whether the rate of uterine rupture in patients with a previous cesarean delivery is related to labor induction and/or cervical ripening using transcervical Foley catheter.
  
  
  METHODS
  Charts of all patients who had a trial of labor after a previous cesarean delivery in our institution between 1988 and 2002 were reviewed. The rates of successful vaginal birth after cesarean delivery and uterine rupture in patients with spontaneous labor (control group) were compared with those of patients who underwent a labor induction by means of amniotomy with or without oxytocin and patients who underwent a labor induction/cervical ripening using a transcervical Foley catheter. Logistic regression analysis was performed to adjust for confounding variables.
  
  
  RESULTS
  Of 2479 patients, 1807 had a spontaneous labor, 417 had labor induced by amniotomy with or without oxytocin, and 255 had labor induced by using transcervical Foley catheter. The rate of successful vaginal birth after cesarean delivery was significantly different among the groups (78.0% versus 77.9% versus 55.7%, P <.001), but not the rate of uterine rupture (1.1% versus 1.2% versus 1.6%, P =.81). After adjusting for confounding variables, the odds ratio (OR) for successful vaginal birth after cesarean delivery was 0.68 (95% confidence interval [CI] 0.41, 1.15), and the OR for uterine rupture was 0.47 (95% CI 0.06, 3.59) in patients who underwent an induction of labor using a transcervical Foley catheter when compared with patients with spontaneous labor.
  
  
  CONCLUSIONS
  Labor induction using a transcervical Foley catheter was not associated with an increased risk of uterine rupture.
authors.affiliation: Department of Obstetrics and Gynecology, Hôpital Ste-Justine, Université de Montréal, Montreal, Quebec, Canada. ubujold\@med.wayne.edu
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Bujold
authors.forename: Sean C
authors.initials: SC
authors.lastname: Blackwell
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Gauthier
mesh_terms: D000328:Adult; D000650:Amnion / Q000601:surgery; D002404:Catheterization / Q000009:adverse effects*; D020070:Cervical Ripening; D002584:Cervix Uteri; D005260:Female; D005865:Gestational Age; D006801:Humans; D016015:Logistic Models; D008499:Medical Records; D008824:Michigan / Q000453:epidemiology; D010121:Oxytocin / Q000008:administration & dosage; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D012307:Risk Factors; D014597:Uterine Rupture / Q000453:epidemiology* / Q000209:etiology*; D016064:Vaginal Birth after Cesarean / Q000706:statistics & numerical data*
chemical_list: D010121:Oxytocin