Noninvasive uterine electromyography for prediction of preterm delivery - 19/08/11
Reprints: Robert E. Garfield, PhD, St Joseph's Hospital and Medical Center, Downtown Campus at TGen, 445 N 5th St., Phoenix, AZ 85004Résumé |
Objective |
Power spectrum (PS) of uterine electromyography (EMG) can identify true labor. EMG propagation velocity (PV) to diagnose labor has not been reported. The objective was to compare uterine EMG against current methods to predict preterm delivery.
Study Design |
EMG was recorded in 116 patients (preterm labor, n = 20; preterm nonlabor, n = 68; term labor, n = 22; term nonlabor, n = 6). A Student t test was used to compare EMG values for labor vs nonlabor (P < .05, significant). Predictive values of EMG, Bishop score, contractions on tocogram, and transvaginal cervical length were calculated using receiver-operator characteristics analysis.
Results |
PV was higher in preterm and term labor compared with nonlabor (P < .001). Combined PV and PS peak frequency predicted preterm delivery within 7 days with area under the curve (AUC) of 0.96. Bishop score, contractions, and cervical length had an AUC of 0.72, 0.67, and 0.54.
Conclusion |
Uterine EMG PV and PS peak frequency more accurately identify true preterm labor than clinical methods.
Le texte complet de cet article est disponible en PDF.Key words : prediction, preterm labor, propagation velocity, uterine electromyography
Plan
| This study was supported in part by National Institutes of Health Grant R01HD037480 and the St Joseph's Foundation, Phoenix, AZ. |
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| Cite this article as: Lucovnik M, Maner WL, Chambliss LR, et al. Noninvasive uterine electromyography for prediction of preterm delivery. Am J Obstet Gynecol 2011;204:228.e1-10. |
Vol 204 - N° 3
P. 228.e1-228.e10 - mars 2011 Retour au numéro
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