尿道ステント(メモサーム(R))の臨床的検討

Abstract

A number of patients with benign prostatic hyperplasia can not undergo surgical therapy because of advanced age, concomitant diseases, and other reasons. Since 1980, various types of urethral stents have been used for high-risk patients with benign prostatic hyperplasia. We report our experience with the use of urethral stents (Memotherm(R)). Between July 2002 and December 2010, we implanted urethral stents in 36 patients. The average follow-up period was 24.0 months. After stent implantation, 34 of the 36 patients were able to micturate. The average residual urine volume was 24.7 ml (0-250 ml), and the maximal urinary flow rate was 10.7 ml/s (3-24 ml/s). One stent had to be removed due to bladder tamponade, and one had to be exchanged due to dislocation. In 2 patients, a stone formed at the bladder end of the stent, and one of these patients underwent transurethral lithotripsy. Our results suggest that therapy with the Memotherm(R) urethral stent is a good option for patients suffering from urinary retention due to benign prostatic hyperplasia.