Nova generacija stentova uretre-Allium u terapiji simptomatskog uvecanja prostate razlicite etiologije

Abstract

A number of urethral stents made of different materials, with different time of indwelling and different designs, primarily based on the vascular stent concept, have been applied in the clinical practice so far. According to the published studies, urethral stents have justified their clinical application, however with certain limitations. Within an attempt to overcome the limitations, a covered, temporary urethral stent was initially designed by Daniel Yachie and Ijko Markovi in Allium corporation from Israel. With its triangular shape, the stent is a replica of the obstructive prostatic urethral lumen. In has been applied in a series of 14 patients with lower urinary tract symptoms caused by the obstruction at the level of the prostatic urethra. The subjects were averagely aged 77.4 +/- 5.1 years. Allium prostatic stent remained in place in the patients for 4.93 +/- 3.17 months, at the average.

New developments in the use of prostatic stents

“…Furthermore, the triangular prostatic stent has a special plastic coating in order to prevent encrustation. A small series of 23 patients with a mean follow-up of 9 months revealed good tolerability and no cases of stent migration 20,21…”

“…Marković et al developed the triangular prostatic stent, which has a large-caliber triangular cross-section to match the contours of the prostatic urethral lumen 20. This stent bears higher radial force in its main body and lower radial force in the area near the external sphincter in order to prevent sphincteric dysfunction.…”

“…Urethral strictures can be managed with the insertion of a urethral stent, which is similar to the prostate stent 5,20. Usually, this is the case for bulbar urethral strictures after at least two failures of treatment with direct vision internal urethrotomy or dilatation in patients who are unfit or do not want to undergo urethroplasty.…”

Allium™ TPS—A New Prostatic Stent for the Treatment of Patients with Benign Prostatic Obstruction: The First Report

“…Markovic and coworkers were the first to report the use of Allium stents, including TPS, in preliminary studies of safety. 13 a Two stents were removed: one due to hematuria (after 2 months) and the other due to chronic infection (after 1 month).…”