[1st experiences with a urethral endothesis in bladder neck adenoma]

Our examinations hitherto performed allow the following conclusions: 1. The placed before endothesis for the pars prostatica urethrae allows a spontaneous miction which is nearly free of residual urine. Here the endothesis cannot render possible the physiologic funnel-shaping of the vesical neck. This is theoretically not possible and was confirmed by means of fluoroscopic control of the act of miction in lying endothesis. By the endothesis the pars prostatics urethrae is passively kept open. The continence takes place by the so-called sphincter externus and the diaphragma urogenitale (5). The voluntary relaxation of the diaphragma urogenitale and the contraction of the detrusor render possible the depletion of the urinary bladder. By reason of the lacking funnelling the residual urine proved in several patients can be explained as well as the relatively low maximum value of the urinary flow of about 15 ml/s despite a miction which was subjectively regarded as good. 2. The disadvantages of the permanent catheter mentioned at the beginning as well as the usual care of the catheter and bladder irrigations are unnecessary. 3. Incrustations were not observed up to the 78th day.