Can myometrial electrical activity identify patients in preterm labor?

Most, Orli; Langer, Oded; Kerner, Ram; David, Gal Ben; Calderon, Ilan

doi:10.1016/j.ajog.2008.08.003

Cited by 34 publications

(34 citation statements)

References 28 publications

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“…The following measures of predictive accuracy were calculated for each of the outcome variables using three fixed thresholds (15,20, and 25 mm) and the three outcome-specific thresholds described (15,20, and 25 mm) and outcome-specific thresholds (those associated with the inflexion point in the receiver operating characteristic curve, a detection rate of 90% and a false-positive rate of 10%). * Presented as rate of preterm delivery in women with cervical length less than the threshold compared with women with a cervical length at the threshold or greater than the threshold.…”

Section: Methodsmentioning

confidence: 99%

Predictive Value of Cervical Length in Women With Threatened Preterm Labor

Melamed

Hiersch

Domniz

et al. 2013

Obstetrics & Gynecology

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Section: Methodsmentioning

confidence: 99%

Predictive Value of Cervical Length in Women With Threatened Preterm Labor

Melamed

Hiersch

Domniz

et al. 2013

Obstetrics & Gynecology

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“…Results of a recent study of Most et al suggested that raised uterine EMG activity may help in identification of pregnant women in true rather than threatened PTD < 35 weeks [6]. They concluded that EMG uterine assessment and identification of pregnant women could be a useful parameter in prediction of PTD [6].…”

Section: Discussionmentioning

confidence: 99%

“…They concluded that EMG uterine assessment and identification of pregnant women could be a useful parameter in prediction of PTD [6]. Maner et al concluded that raised uterine EMG activity in the third trimester may predict delivery within 24 hours at term and within four days in PTD [7], whereas Verdenik et al found that raised uterine EMG activity had sensitivity of 47% and specificity of 90% for prediction of PTD in the late second and third trimester of pregnancy [19].…”

Section: Discussionmentioning

confidence: 99%

“…[6,7,19,20]. Abdominal uterine EMG assessment is a simple, noninvasive, easy and well accepted method for understanding uterine physiology [3,[6][7][8][9][10][11][12][13].…”

Section: Discussionmentioning

confidence: 99%

“…Nowadays there is an increasing attention in two topics related to screening for PTD; uterine electrical activity evaluated by electromyography (EMG) and cervical shortening assessed by sonographic cervical length (CL) measurement [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Raised electrical uterine activity and shortened cervical length could predict preterm delivery in a low-risk population

Grgić

Matijević

Kuna

2011

Arch Gynecol Obstet

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Methods: Prospective study of 308 low-risk women. Shortened CL was defined as < 25 mm (< 5th centile), while raised EMG activity was defined as presence of > 20 action potentials in 20 minutes of assessment (> 95th centile). Outcome measures were diagnostic accuracy of both tests for prediction of PTD and early PTD (< 34 weeks).Results: The incidence of PTD was 23/308 (7.4%) while the incidence of early was 9/308 (2.9%). Shortened CL and raised EMG activity are significantly related to PTD (prevalence-weighted likelihood ratio (pwLR) 1.9 (95%CI 1.0-3.5) versus 9.5 (95%CI 2.5-35.7), but not to early PTD (pwLR 0.4 (95%CI 0.2-0.8) versus 0.6 (95%CI 0.3-1.7).Significant predictive value for early PTD was found only if shortened CL was concomitant with raised EMG activity (pwLR 4 (95% CI 1.3-14.3).Conclusion: Shortened CL and raised EMG activity in the second trimester have significant accuracy regarding the prediction of PTD in a low-risk population. However, in order to be useful as a predictor for early PTD, both tests must be positive.

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