A new, large calibre, self‐expanding and self‐retaining temporary intraprostatic stent (ProstaCoil) in the treatment of prostatic obstruction

Abstract

Because of its large diameter and its temporary nature this new stent allows endoscopic examination of the bladder and has few side effects. This stent should be considered as an alternative to a urethral catheter or other temporary stents in patients who are unfit for surgery.

Comparison between First-Generation (Fixed-Caliber) and Second-Generation (Self-Expanding, Large Caliber) Temporary Prostatic Stents

“…4). The technique of insertion of the stents were described elsewhere [2,3], For both stents, after their insertion in order to check the patency of the external sphincter patients were asked to void and stop the stream voluntarily. Patients who could not pass urine were asked to cough.…”

“…Patients temporarily or permanently unfit for sur gery need an indwelling catheter for long periods or per manently. Although urethral catheterization is the sim plest form of diversion in urinary retention as a long-or short-term palliative treatment, long-term indwelling catheters are documented as the main cause of ascending urinary infections and related complications [3][4][5][6], Since Fabian [1,8] reported on his development of a 'partial catheter', we have become aware of the benefits of intra prostatic stents. Ten years after this development the tem porary intraprostatic coil stents have become a satisfacto ry alternative for the treatment of urinary retention caused by prostatic obstruction, in many countries espe cially in Europe and the Middle East.…”

“…10] and develop calcification on the portion which projects into the bladder or in the entire device [9][10][11][12], The second-generation stent we used, the ProstaCoil, was developed to prevent some drawbacks of the first-generation temporary coil stents and the perma nent stents. The ProstaCoil [3] is based on the same prin ciple as the self-expanding and self-retaining coil stents developed for use in recurring urethral strictures [13. 14], Its entirely hollow lumen allows passage of instruments up to 17 F through its large lumen.…”

“…Since 1988 we have used two different kinds of intra prostatic stents in place of indwelling catheters: the First one was the Prostakath (Engineers & Doctors A/S, Hornback. Denmark), a First-generation gold-plated stainless- [2], The second stent used was the ProstaCoil (InStent, Inc., Minneapolis, Minn., USA) which is a second-generation self-retaining and self-expanding stent made of nickel-titanium alloy (nitinol) [3].…”

First Experiences with the Spanner™ Temporary Prostatic Stent for Prostatic Urethral Obstruction

“…As these stents are for temporary use, they need to be easily removed or replaced, with biodegradable stents being an exception [16]. Examples of temporary stents include the Urospiral, Prostakath, ProstaCoil, Memokath, Biofix, Intraurethral Catheter, Barnes stent and Trestle [17,18,19,20]. …”