Uterine electromyography for identification of first-stage labor arrest in term nulliparous women with spontaneous onset of labor

Objective We sought to study whether uterine electromyography (EMG) can identify inefficient contractions leading to first-stage labor arrest followed by cesarean delivery in term nulliparous women with spontaneous onset of labor. Study Design EMG was recorded during spontaneous labor in 119 nullipa...

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Published inAmerican journal of obstetrics and gynecology Vol. 209; no. 3; pp. 232.e1 - 232.e8
Main Authors Vasak, Blanka, MD, Graatsma, Elisabeth M., PhD, MD, Hekman-Drost, Elske, MD, Eijkemans, Marinus J., PhD, MD, Schagen van Leeuwen, Jules H., PhD, MD, Visser, Gerard H., PhD, MD, Jacod, Benoit C., PhD, MD
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 01.09.2013
Subjects
Adult
cesarean delivery
Cesarean Section
Electromyography
electromyography/EMG
Female
Humans
labor arrest
Labor Stage, First - physiology
Obstetrics and Gynecology
parturition
Pregnancy
Prospective Studies
uterine
Uterine Contraction
cesarean delivery
uterine
electromyography
parturition
labor arrest
electromyography/EMG
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Summary:Objective We sought to study whether uterine electromyography (EMG) can identify inefficient contractions leading to first-stage labor arrest followed by cesarean delivery in term nulliparous women with spontaneous onset of labor. Study Design EMG was recorded during spontaneous labor in 119 nulliparous women with singleton term pregnancies in cephalic position. Electrical activity of the myometrium during contractions was characterized by its power density spectrum (PDS). Results Mean PDS peak frequency in women undergoing cesarean delivery for first-stage labor arrest was significantly higher (0.55 Hz), than in women delivering vaginally without (0.49 Hz) or with (0.51 Hz) augmentation of labor ( P  = .001 and P  = .01, respectively). Augmentation of labor increased the mean PDS frequency when comparing contractions before and after start of augmentation. This increase was only significant in women eventually delivering vaginally. Conclusion Contraction characteristics measured by uterine EMG correlate with progression of labor and are influenced by labor augmentation.
Bibliography:ObjectType-Article-1
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ISSN:0002-9378
1097-6868
DOI:10.1016/j.ajog.2013.05.056