A comparison between electrical uterine monitor, tocodynamometer and intra uterine pressure catheter for uterine activity in labor

Hadar, Eran; Biron‐Shental, Tal; Gavish, Oz; Raban, Oded; Yogev, Yariv

doi:10.3109/14767058.2014.954539

Cited by 42 publications

(39 citation statements)

References 27 publications

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“…Meanwhile they found poor correlation between Toco and IUPC in regard to contraction amplitude and duration. 11 Several groups, including our own, have reported the superiority of EHG over Toco, 5,7,9 especially in the obese. 12 Although contraction amplitude does not directly correlate between EHG and IUPC, 6 a relationship does exist [13][14][15][16] that could be used to generate comparable tracings.…”

Section: Discussionmentioning

confidence: 90%

“…Contractions marked on the Toco/EHG signal that have a peak within 30 seconds of that marked on the IUPC signal are "consistent" contractions. 9 False positives are UA contractions marked by clinicians in a Toco/EHG tracing and not in the corresponding IUPC tracing. False negatives are UA contractions marked in an IUPC tracing and not in the corresponding Toco/EHG tracing.…”

Section: Methodsmentioning

confidence: 99%

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Monitoring Uterine Activity during Labor: Clinician Interpretation of Electrohysterography versus Intrauterine Pressure Catheter and Tocodynamometry

Euliano¹,

Nguyen²,

Darmanjian

et al. 2016

Amer J Perinatol

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Objective The aim of this article was to compare clinical interpretation of uterine activity tracings acquired by tocodynamometry and electrohysterography with the gold standard, intrauterine pressure. Study Design Using data from a previous study, subjects who had simultaneous monitoring with all three uterine activity devices were included in this study. These were parturients who required intrauterine pressure catheter (IUPC) placement for obstetric indication. A Web-based application displayed scrolling 30-minute segments of uterine activity. Two blinded obstetricians and two blinded obstetric nurses independently reviewed the segments, marking uninterpretable segments and the peak of each contraction. Interpretability was compared using positive percent agreement. False positives are contractions marked in the noninvasive strip that have no corresponding contraction in the IUPC strip. False negatives are the reverse. Results A total of 135 segments, acquired during either Stage 1 (active labor) or Stage 2 (pushing), from 105 women, were included in this analysis. For all four observers, both interpretability and sensitivity of electrohysterography exceeded that of tocodynamometry (p < 0.0001). This remained true for the obese population (96 segments). Conclusion Compared with the IUPC, electrohysterography is more sensitive and provides tracings that are more often interpretable than tocodynamometry for intrapartum monitoring; electrohysterography is also less affected by increasing maternal body mass index.

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Section: Discussionmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Monitoring Uterine Activity during Labor: Clinician Interpretation of Electrohysterography versus Intrauterine Pressure Catheter and Tocodynamometry

Euliano¹,

Nguyen²,

Darmanjian

et al. 2016

Amer J Perinatol

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“…Uterine contractility is monitored during pregnancy to evaluate the threat of preterm labor. The most common technique for evaluating uterine contractility is by external tocodynamometry (TOCO) [13]. Nevertheless, TOCO presents some disadvantages and limitations such as the required re-positioning, its effectiveness depends on the subjectivity of the clinician and it do not provide any information on the efficiency of uterine contractions, which is essential information for detecting true preterm labor [16].…”

Section: Introductionmentioning

confidence: 99%

Uterine electromyography for discrimination of labor imminence in women with threatened preterm labor under tocolytic treatment

Mas-Cabo

Prats-Boluda

Perales³

et al. 2018

Med Biol Eng Comput

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As one of the main aims of obstetrics is to be able to detect imminent delivery in patients with threatened preterm labor, the techniques currently used in clinical practice have serious limitations in this respect. The electrohysterogram (EHG) has now emerged as an alternative technique, providing relevant information about labor onset when recorded in controlled checkups without administration of tocolytic drugs. The studies published to date mainly focus on EHG-burst analysis and, to a lesser extent, on whole EHG window analysis. The study described here assessed the ability of EHG signals to discriminate imminent labor (< 7 days) in women with threatened preterm labor undergoing tocolytic therapy, using both EHG-burst and whole EHG window analyses, by calculating temporal, spectral, and non-linear parameters. Only two non-linear EHG-burst parameters and four whole EHG window analysis parameters were able to distinguish the women who delivered < 7 days from the others, showing that EHG can provide relevant information on the approach of labor, even in women with threatened preterm labor under the effects of tocolytic therapy. The whole EHG window outperformed the EHG-burst analysis and is seen as a step forward in the development of real-time EHG systems able to predict imminent labor in clinical praxis. Graphical abstract The ability of EHG recordings to predict imminent labor (< 7 days) was analyzed in preterm threatened patients undergoing tocolytic therapies by means of EHG-burst and whole EHG window analysis. The non-linear features were found to have better performance than the temporal and spectral parameters in separating women who delivered in less than 7 days from those who did not.

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“…Though non‐invasive, a major criticism of an external device such as TOCO is its reliability to provide good‐quality signals and especially on obese women with BMI >35 kg/m 2 . There have been several studies exploring the quality of signals on obese women in comparison with non‐obese women.…”

Section: Discussionmentioning

confidence: 99%

Comparing the performance of a new disposable pneumatic tocodynamometer with a standard tocodynamometer

Eswaran

Wilson

Murphy

et al. 2016

Acta Obstet Gynecol Scand

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A comparison between electrical uterine monitor, tocodynamometer and intra uterine pressure catheter for uterine activity in labor

Abstract: EUM is efficient as IUPC for uterine activity assessment and both techniques are superior in comparison to external tocodynamometry. Our results support the use of non-invasive EMG technology to monitor uterine activity.

Cited by 42 publications

References 27 publications

Monitoring Uterine Activity during Labor: Clinician Interpretation of Electrohysterography versus Intrauterine Pressure Catheter and Tocodynamometry

Monitoring Uterine Activity during Labor: Clinician Interpretation of Electrohysterography versus Intrauterine Pressure Catheter and Tocodynamometry

Uterine electromyography for discrimination of labor imminence in women with threatened preterm labor under tocolytic treatment

Comparing the performance of a new disposable pneumatic tocodynamometer with a standard tocodynamometer

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