June 14, 2018 (Flag Day) OASIS – Overactive Bladder Stimulation System study will trial 250 patients.  Enrollment begins in 2019 and will test efficacy of tibial nerve stim for treatment refractory OAB. MDMagazine #Trial #iStim #tibialnerve #OveractiveBladder #FDA #OAB #Nervestimulation #RENOVA