Extracorporeal Magnetic Innervation in Combination With Mirabegron in the Treatment of Overactive Bladder

In this study the investigators are studying the impact of extracorporeal electromagnetic stimulation on the treatment of overactive bladder (OAB). For the research, the investigators will gather participants' basic demographic information (age, co-morbidities, etc.), results of uro-gynecological examinations (gynecological and transabdominal ultrasound, uroflow, urinalysis) and the results of different questionnaires, which will be filled out by the participants, describing the burden of the investigated disease and the impact on quality of life. The research will last 8 weeks. Before the start of the research, participants will submit a urine sample to rule out a urinary tract infection and determine baseline laboratory parameters in the urine. Participants will then receive 50 mg of mirabegron daily in the form of tablets, which is used to treat OAB according to current treatment guidelines. Twice a week participants will come to the Department of General Gynecology and Gynecological Urology, Clinic of Gynecology and Perinatology, UMC Maribor, where the investigators will additionally perform extracorporeal electromagnetic stimulation for the treatment of OAB. These treatments will last 20 minutes each time. The patients will be divided into 2 groups, namely one group will receive actual electromagnetic stimulation, and the other group will receive placebo stimulation. At the beginning of the research and after 4 and 8 weeks, the investigators will perform a uro-gynecological examination, with ultrasound measurements of the remaining urine in the bladder and determination of the thickness of the bladder wall, as well as a uroflow examination. It will be necessary for the participants to submit urine for laboratory tests and to fill out questionnaires regarding OAB symptoms. Based on the safety profile of mirabegron and extracorporeal electromagnetic stimulation, the investigators do not expect any serious side effects. The investigators anticipate that there will be a reduction in the symptoms caused by the overactive bladder. In the event of a serious adverse event, participants can contact the on-call gynecologist or on-call urologist at UMC Maribor, who are available 24 hours a day. In the research, the participants' personal data will remain undisclosed, as the investigators will lead each participant under a random number during data processing, and will also display the results in the form of an average for the entire group of participants, so that it will not be possible to draw conclusions about participants' identity based on the results. Participation in the research is voluntary, and participants can stop participating at any stage of the research.