Taiwanese Journal of Obstetrics & Gynecology (May 2021)

A study of uterine inertia on the spontaneous of labor using uterine electromyography

  • Pin Li,
  • Lele Wang,
  • Xueya Qian,
  • Abraham Morse,
  • Robert E. Garfield,
  • Huishu Liu

Journal volume & issue
Vol. 60, no. 3
pp. 449 – 453

Abstract

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Objective: The purpose of this study is to analyze uterine electromyography burst patterns in patients with spontaneous labor and patients with uterine inertia. Materials and methods: Uterine electromyography was recorded using 4 silver/silver chloride electrodes placed periumbilical. Thirty women in the spontaneous labor were enrolled. Uterine electromyography was also recorded from patients with uterine inertia before and after oxytocin treatment. EMG bursts were characterized by analysis of multiple variables including burst frequency, duration, root mean squared, amplitude, and total power. Results: There were significant reductions (P .05) to patients in spontaneous labor. Conclusions: Uterine electromyography can be used effectively to distinguish patients progressing with spontaneous labor from patients that develop uterine inertia. Uterine inertia is characterized by reduced EMG activity and failure of cervical dilation. Uterine electromyography is a quantitative, non-invasive assessment tool that contributes to the diagnosis, evaluation and management of patients with spontaneous labor and uterine inertia.

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