Could electrohysterography be the solution for external uterine monitoring in obese women?

Objectiveto evaluate the influence of maternal obesity on the performance of external tocodynamometry and electrohysterography.study designin a 2-hour measurement during term labor, uterine contractions were simultaneously measured by electrohysterography, external tocodynamometry, and intra-uterine pressure catheter. the sensitivity was compared between groups based on obesity (non-obese/obese/morbidly obese) or uterine palpation (good/moderate/poor), and was correlated to maternal bmi and abdominal circumference.resultwe included 14 morbidly obese, 18 obese, and 20 non-obese women. in morbidly obese women, the median sensitivity was 87.2% (iqr 74–93) by electrohysterography and 45.0% (iqr 36–66) by external tocodynamometry (p < 0.001). the sensitivity of electrohysterography appeared to be non-influenced by obesity category (p = 0.279) and uterine palpation (p = 0.451), while the sensitivity of tocodynamometry decreased significantly (p = 0.005 and p < 0.001, respectively). furthermore, the sensitivity of both external methods was negatively correlated with obesity parameters, being non-significant for electrohysterography (range p-values 0.057–0.088) and significant for external tocodynamometry (all p-values < 0.001).conclusionselectrohysterography performs significantly better than external tocodynamometry in case of maternal obesity.