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Induction of labour with retrievable prostaglandin vaginal inserts: outcomes following retrieval due to an intrapartum adverse event
Abstract
Objective
To assess adverse event (AE) resolution, delivery mode and neonatal outcomes after misoprostol or dinoprostone vaginal insert (MVI or DVI) retrieval due to AE during induction of labour (IOL).Design
Randomised, double-blind trial, EXPEDITE.Setting
Thirty five obstetric departments, USA.Population
Consisted of 1358 pregnant women with modified Bishop score ≤4 eligible for pharmacological IOL.Methods
Post hoc analysis.Main outcome measures
AEs prompting insert retrieval, times to AE resolution, delivery, delivery mode and neonatal intensive care unit (NICU) admissions.Results
77/678 (11.4%) and 27/680 (4.0%) women had MVI and DVI retrieved due to AE, respectively (P < 0.001). The most common AEs prompting retrieval were uterine tachysystole with fetal heart rate (FHR) involvement and category II/III FHR pattern. Time to AE resolution varied for both treatments depending on the type of AE. For uterine tachysystole with FHR involvement, median resolution times were 1 hour 34.5 minutes (n = 36) and 8.5 minutes (n = 8) for MVI and DVI, respectively. Caesarean delivery occurred in a high proportion of women with insert retrieved due to AE (MVI: 44/77 (57.1%); DVI: 19/27 (70.4%)); the majority of caesareans were performed at least several hours after insert retrieval. Median times from retrieval to any delivery were not increased for women with insert retrieved due to AE. NICU admissions were 8/77 (10.4%) and 1/27 (3.7%) for MVI and DVI, respectively (P = 0.440).Conclusions
AEs leading to insert retrieval were primarily uterine tachysystole with FHR involvement and category II/III FHR patterns. Insert retrieval due to an AE did not prolong time to delivery for either prostaglandin insert.Tweetable abstract
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