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A comparison of surface acquired uterine electromyography and intrauterine pressure catheter to assess uterine activity

  • Gabi Haran
    Affiliations
    Department of Obstetrics and Gynecology, Maternal Fetal Unit, Meir Medical Center, Kfar Saba, affiliated with the Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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  • Michal Elbaz
    Affiliations
    Department of Obstetrics and Gynecology, Maternal Fetal Unit, Meir Medical Center, Kfar Saba, affiliated with the Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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  • Moshe D. Fejgin
    Affiliations
    Department of Obstetrics and Gynecology, Maternal Fetal Unit, Meir Medical Center, Kfar Saba, affiliated with the Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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  • Tal Biron-Shental
    Correspondence
    Reprints: Tal Biron-Shental, MD, Department of Obstetrics and Gynecology, Meir Medical Center, 59 Tchernichovsky St., Kfar Saba 44821, Israel
    Affiliations
    Department of Obstetrics and Gynecology, Maternal Fetal Unit, Meir Medical Center, Kfar Saba, affiliated with the Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Published:December 26, 2011DOI:https://doi.org/10.1016/j.ajog.2011.12.015

      Objective

      Intrauterine pressure catheter (IUPC) is the primary device used to evaluate uterine activity. In contrast to the IUPC, electrical uterine myography (EUM) enables noninvasive measurement of frequency, intensity, and tone of contractions. The aim of this study was to determine the accuracy of EUM compared to IUPC.

      Study Design

      EUM measured myometrial electrical activity using a multichannel amplifier and a noninvasive position sensor. In all, 47 women in labor were monitored simultaneously with an IUPC and EUM. We compared the frequency, intensity, and tone of uterine contractions between the methods.

      Results

      The correlation of the frequency, intensity, and tone of contractions between uterine electromyography and IUPC was strong with significant r values of 0.808-1 (P < .0001).

      Conclusion

      Electrical uterine electromyography yields information about uterine contractility comparable to that obtained with IUPC.

      Key words

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      Linked Article

      • Discussion: ‘A new method for assessing uterine activity’ by Haran et al
        American Journal of Obstetrics & GynecologyVol. 206Issue 5
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          In the roundtable that follows, clinicians discuss a study published in this issue of the Journal in light of its methodology, relevance to practice, and implications for future research. Article discussed: Haran G, Elbaz M, Fejgin MD, et al. A comparison of surface acquired uterine electromyography and intrauterine pressure catheter to assess uterine activity. Am J Obstet Gynecol 2012;206:412.e1-5.
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