Optimal location of the reference electromyography electrode in urodynamic studies
Project no. 21231 · Status: Kapanmış (Yayın bekleniyor) · 2020
Summary
Pelvic floor activity evaluation is an important component of urodynamic studies, which has an important place in the diagnosis and follow-up of neurogenic and non-neurogenic lower urinary tract disfunction. Pelvic floor activity is examined by electromyography (EMG) using surface electrodes. It is the most important finding of disorders such as dysfunctional voiding that is treated when the pelvic floor is loose or difficult to be active during voiding. Examining the electrical activity of the perianal 2 electrodes placed for the electromyography procedure can only be done with a reference electrode attached to another point. Although there is information about the location of the reference electrode in the literature, there is no study that compares them and shows how it can affect the electromyography result. In our study, we were planned to compare the effects of placing the reference probe on the skin on the quadriceps femoris muscle, which is the traditional location, and the effects of placing it on different body parts in the electromyography examination showing pelvic floor activity. For this purpose, a device that has the same active electrodes and different reference electrodes and can record 4 simultaneous electromyography’s has been made. Active electrodes were placed on the perianal region, and reference electrodes were placed on the skin above the knee, spina iliaca anterior superior, gluteus, and quadriceps femoris. When the electromyography data obtained in a total of 21 cases were analyzed, it was observed that the reference electrode placed on the knee was less successful in demonstrating contraction compared to other references. However, perianal contraction was still recorded. Although there is a significant difference between other reference values, this difference is quite low. In our study, the most suitable localization to place the reference electrode in urodynamic studies was determined as the gluteal skin. However, we think that placing a reference electrode on the skin over the quadriceps femoris or SIAS will not affect the electromyography result.