706: Electrical uterine myography (EUM) is as good as intra uterine pressure catheter (IUP) in measuring contractions

Electrical uterine myography (EUM) enables noninvasive measuring of uterine contractions. Unlike the external commonly used monitor, the EUM is capable of evaluating the intensity of the contractions. Nowadays, whenever this parameter is crucial during labor, intra uterine pressure catheter (IUP) is used. Since IUP is invasive, requires ruptured membranes and might increase infections and bleeding, an accurate noninvasive tool to measure contractions is beneficial. The aim of this study was to determine the accuracy of the EUM in evaluating contraction compared to IUP. EUM was measured prospectively on 10 women in different stages of labor. Subjects were monitored simultaneously by an IUP monitor. Myometrial electrical activity was measured using a multi-channel amplifier and a 3-dimensional non-invasive position sensor. Data evaluator was blinded to clinical parameters. Energy was presented in units of micro-Watts and was compared to IUP. We compared the intensity, the length and the frequency of uterine contractions between the two methods. Usage of IUP was made only according to clinical indications. Pearson analysis showed complete correlation between the EUM and the IUP in terms of timing, length and intensity of the contractions (P<0.0001). EUM is as good as IUP for evaluating contractions during labor. Since EUM is noninvasive, it might be even beneficial.