Evaluation of treatment effects of three different urethral stents in patients with prostatic obstruction (Report of 116 cases)
SUN Yu-cheng WANG Jian LI Jin ZHANG yi ZHAO Yu-ming
(Department of Urology, the Xuanwu Hospital, Capital Medical University, Beijing,100053)
Abstract Purpose: In order to know the effectiveness of three different urethral stents in the treatment of prostatic obstruction . Methods: 35 cases were treated with spiral stents (group on e) from Mar.1992 to Jun.1999,including benign prostatic hyperplasia (BPH) 34 cases, prostatic cancer 1 case, mean age 71.5years. From Oct.1993 to Jun.1999,58 cases were implanted with tubular meshes (group two), including BPH 54, advanced prostate cancer 4, mean age 76.9 years. During the same period as group tow, 23 cases with BPH were treated with Angiomed mesh (Urolume memotherm,group three), mean age was 75.1years, in which 17 received epidural anesthesia and percutanous cystostomy. Results: For group one, good results were achieved in eight cases (22.8%) and significant improvements occurred in 24 (68.5%) with a follow up of 21～60 months, mean effective time was 10.8 months. For group two, a dramatically effective rate was obtained in 54 (96%), with a follow up of 24～66 months (mean 42.6 months), two, three and four year effective rates were 85.7%, 78% and 63%. With a follow up of 23～64 months, we have got 100%, 91.6% and 88.8% of two, three and four year effective rates in group three. Conclusions: Spiral stent has poor effective rate and is rarely used an present. The tubular mesh with a diameter large enough and good antipressure properties makes it possible to be inserted into the urethral and covered by urothelium. As a permanent stent, a 78% and 63% effective rate was achieved at least three and four years after the implantation and many patients can afford the expenses. Compared with the tubular mesh, Angiomed stent wit h high compatibility with the tissue, low irritation and easy coverage by urothelium, has shown a 90% three year effective rate. The tubular mesh should be further improved in quality.
Key words Urethral stent Prostatic obstruction Benign prostatic hyperplasia