To explore information hidden in the electromyographic (EMG) signals of the urethral sphincter that may be of prognostic significance for patients with primary bladder neck obstruction (PBNO). 41 patients with voiding difficulty were divided into four groups: 1) patients with primary bladder neck obstruction (PBNO) with successful (Group 1. n = 14) and 2) unsuccessful (Group 2. n = 8)... https://foldlyers.shop/product-category/household-kits/