Comparison of 30‐mL and 80‐mL Foley catheter balloons and oxytocin for preinduction cervical ripening

Cervical ripening with the balloon catheter and the risk of subsequent preterm birth

“…In addition, the single-balloon catheter used in our study was a 24-French Foley catheter filled with 60 ml of normal saline compared with a 16-French Foley catheter filled with 30 ml normal saline in the study of Sciscione et al 15 It has been reported from previous studies that inflation of a transcervical Foley balloon for ripening to 60 or 80 ml is a more effective method compared with inflation to 30 ml. 10,18,19 The amount of normal saline inflated was not stated in the second study. 14 An increased amount of fluid should increase the pressure applied on the cervix and as a consequence more cervical weakening may be anticipated.…”

Labor Induction With a Foley Balloon Inflated to 30 mL Compared With 60 mL

“…There are only two randomized trials directly comparing 30-mL compared with 80-mL Foley catheter single balloon inflation sizes with delivery outcomes, which showed higher rates of delivery within 24 hours among the 80-mL group. 15,16 However, a comparison of the 30-mL Foley balloon with different inflation volumes has not been conducted.…”

Increased single‐balloon Foley catheter volume for induction of labor and time to delivery: a systematic review and meta‐analysis

“…The balloon size was not specified in two additional trials, but no specific ruptures were reported, and the authors could not be reached for confirmation . The authors of the remaining trials confirmed that the overinflation did not result in Foley balloon rupture (0 of 238 large‐volume balloons) . Sandberg et al routinely performed amniotomy after expulsion of the balloon if the Bishop score was considered favorable (>6), otherwise a second Foley catheter was placed (Table ) .…”

“…Authors were contacted for any trials identified in abstract form or clinical trial registry to assess appropriateness for inclusion in the meta-analysis. Four trial authors responded (5)(6)(7)(8), and three provided additional unpublished data and collaboration in the meta-analysis (5,7,8).…”