Programa del congreso

Uterine peristalsis refers to subtle myometrial contractions that are essential for reproductive processes throughout the menstrual cycle. Intracavitary electrohysterography (IC-EHG) is a novel technique that captures the electrical activity underlying these contractions. It addresses several limitations of current image-based methods although it involves the insertion of an intrauterine catheter, raising questions about potential interference with natural dynamics. In this study, 61 high-quality IC-EHG recordings were obtained from 40 healthy volunteers across different phases of their menstrual cycles. We analysed how three key peristaltic parameters (frequency, amplitude, duration) changed after catheter insertion, using sliding windows of 3, 5, 10, and 15 minutes. Our results show that mechanical stimulation from catheter insertion alters frequency and duration initially (Mean Percentage Error (MPE) 10.23%, -4,88%, respectively with 10-minute window) but these effects fade over time with no significant differences about 5 minutes later (MPE: 1.54%, 3.60%, respectively with 10-minute window). Amplitude, however, remains largely unaltered (MPE: 3.89% initially, 0.87% after 5 minutes). Longer recordings consistently showed reduced MPE values, suggesting greater reliability in parameter estimation. Making long recordings or waiting for a few minutes minimizes the impact of catheter-induced alterations when assessing uterine peristalsis using IC-EHG.