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Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial
A prospective randomised controlled trial of external cephalic version comparing two methods of uterine tocolysis with a non-tocolysis group.
Singapore Medical Journal 1989 April
The use of tocolvtic agents to enhance uterine relaxation and facilitate external cephalic version (ECV) has come under recent debate. We studied 90 breech presentations in late pregnancy who did not have contra-indications to ECV. The patients were randomised into 3 groups of 30 patients each: one was administered oral salbutamol 4 mg t.d.s.; another had intravenous salbutamol infused until the maternal heart rate rose above 100 bpm for 30 mins; and the last served as a control group. All patients in each group were matched for parity and gestation, and each had an intravenous line, thereby masking the treatment group from the 2 doctors who performed half the number of ECVs each. There was no significant difference in the success of ECV between the treatment and control groups (46.6% vs 50.0% vs 46.6%). The gestational age, the placental site, the attitude of the breech, the abdominal girth, and the maternal weight and fetal birth weights did not seem to influence results. On the other hand, there was a significant difference in successful ECV between nullipara (26%) and multipara (75%) (p less than 0.001). There were no cases of abruptio placenta or foetal distress, and one patient entered labour one day after the ECV at 39 weeks gestation. There were 2 cases of spontaneous version after failed ECV, and one case of spontaneous reversion to breech after successful ECV. We conclude that the use of salbutamol does not increase the incidence of successful ECV, but multiparity predicts for a successful outcome.
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