Continued versus discontinued oxytocin stimulation in the active phase of induced labour: Factors associated with unexpectedly high rates of conversion to open label oxytocin in the CONDISOX trial.

Steer, Philip J; Glavind, Julie; Uldbjerg, Niels; Bor, Pinar; Boie, Sidsel · BJOG · 2023

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Abstract

To examine the factors associated with unexpectedly high rates of conversion to open label oxytocin in the CONDISOX trial of continuation versus discontinuation of oxytocin infusion during induced labour. Secondary retrospective analysis of data from a prospective randomised controlled trial. Nine hospitals in Denmark and one in the Netherlands between 8 April 2016 and 30 June 2020. 1200 women having labour induced. Analysis of outcomes by actual management. Mode of delivery and associated variables. Switching to open label oxytocin (42.4% overall) was associated with nulliparity, an unripe cervix, larger babies and higher rates of delivery by caesarean section. In the CONDISOX trial, slow labour was associated with features suggesting a higher 'resistance to progress', often prompting the use of open-label oxytocin infusion rather than study medication.

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