This work introduces the development of a novel intravaginal device that is connected to a mobile data acquisition system and able to discern the correct contraction of the pelvic floor muscles versus contraction of adjacent muscles or abdominal thrust efforts.
A proof of concept has been implemented in consisted of the design of the vaginal probe, design of the data acquisition unit, design of the user interface for data analysis, and implement improvements based on the results of a cross-sectional pilot clinical study.
The study involved the participation of three engineers and a technology company that designed the electronics for the probe and the software for the mobile application. The clinical tests were conducted by two physiotherapists and one engineer. The probe has been tested in four women aged > 18 years, without PFD, no pelvic pain, no prior pregnancies, or pelvic surgeries. The assessment was conducted in lithotomy position and procedure consisted on (1) rest position, (2) PFM maximal voluntary contractions, (2) straining maneuver and (3) voluntary PFM contraction plus straining maneuver.
The new vaginal probe has a cylindrical shape, measuring 100 mm in length and 20 mm in diameter, and contains six sensors. Two sensors to monitor bilaterally the deep PFM, other two sensors for superficial PFM, one sensor for control at pubis bone and one sensor to measure intraabdominal pressure (IAP). After conducting clinical tests, it was observed that the device was able to distinguish between pressures from the PFM and IAP, differentiating between pressures from the right and left PFM, and from the deep and superficial PFM.
The new probe is capable of detecting contractions of the PFM in its different muscular planes and distinguishing them from IAP. However, it still needs to improve sensitivity to accurately detect week PFM. Further study is needed to improve this proof of concept.
A novel technology is presented that can serve as a customized device for women who wish to improve their PFM qualities. It is capable of distinguishing between the contraction of both the deep and superficial pelvic PFM, as well as discerning a correct PFM contraction from an abdominal contraction and any possible increases in IAP. The mobile application connected to the vaginal device will allow women to receive real-time biofeedback on their exercises, and allows them to share their progress with their physiotherapist.
Women's Health
Innovative technology
