Interventional radiology methods of treating ureteral strictures developed on anastomoses after the radical cystectomy in Mainz pouch II and ileal conduit derivation.

Unlabelled: OBJECTIVE of this work is to evaluate interventional radiology modalities such as balloon catheter dilation (BCD) and stent insertion, as minimally invasive methods in treatment uretero-enteral anastomotic strictures.

Material And Method: Retrospective study enrolled 26 patients (pts) in whom percutaneous BCD (17 pts) and metal stent implantation (9 pts) were done. Study was conducted from June 2005 till August 2007 and included total amount of 470 pts operated during 4 year period from 2003 till 2007.

Recent advances in ureteral stents.

Purpose Of Review: Conventional ureteral stents, which have been in use for almost 30 years, are undergoing several changes in materials, designs and purposes of use.

Recent Findings: Recent advances in ureteroscopes reduced the numbers of double-J insertions. In addition, because of the frequent failures of the double-J stents in malignant obstructions of the ureter coiled metal stents, metal coil-reinforced stents and large-caliber self-expanding stents are being developed for such patients.

Feasibility of fluid volume conductance to assess bladder volume.

Aim: Ambulatory urodynamics has the potential to provide measurements of bladder function during activities of daily living; however, no method of real-time continuous bladder volume measurement exists. The present study was conducted to determine the feasibility of using fluid volume conductance to continuously assess bladder volume.

Methods: Prototype devices consisted of four electrodes mounted on a polymer body.

Endourethral prostheses for urethral stricture.

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 Zeljko Markovic in Allium corporation from Israel.

[A new generation of urethral stents--Allium in the therapy of symptomatic prostatic enlargement of various etiology].

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.

Povidone-iodine sclerotherapy is ineffective in the treatment of symptomatic renal cysts.

Purpose: To evaluate the efficacy of povidone-iodine sclerotherapy after percutaneous drainage of simple renal cysts in the treatment of symptomatic patients.

Patients And Methods: Sixteen patients with symptomatic renal cysts were treated by percutaneous drainage and injection of povidone-iodine solution. The cysts were drained by a nephrostomy tube catheter, and povidone- iodine injections were repeated every 24 hours for 3 days.

Comparison of nitinol urethral stent infections with indwelling catheter-associated urinary-tract infections.

Background And Purpose: To determine the efficacy of intraurethral metal stents in preventing or eradicating urinary-tract infections (UTI) during the management of bladder outlet obstruction (BOO) by comparing the frequency and nature of the infections with indwelling-catheter-associated UTI.

Patients And Methods: The SAS relative-risk test was used to compare the risks of UTI in 76 patients with temporary urethral stents, 60 patients with BOO who had never been catheterized nor stented, and 34 patients with a permanent indwelling urethral catheter (PIUC). Infection was assessed 1 month after placement of the devices.

New approach to the management of stress urinary incontinence in patients with treatment failure.

Urinary incontinence affects about 40 million adults in the Western world. Many mechanical, behavioral, and surgical approaches have been used for its treatment. Many of the surgical techniques are successful, but about 50% of patients need re-treatment after 5 to 7 years.

The Hadera continent reservoir: a new appendico-umbilical continent stoma mechanism for urinary diversion.

Purpose: Creating a reliable continence mechanism for a continent reservoir is a great challenge. We describe an easily formed mechanism for allowing complete continence in such patients.

Materials And Methods: The native appendix attached to a detubularized right colonic reservoir was used as the catheterizable efferent limb.

Transurethral water-induced thermotherapy for the treatment of benign prostatic hyperplasia: a prospective multicenter clinical trial.

Purpose: We evaluate the effectiveness and safety of transurethral water-induced thermotherapy for the treatment of lower urinary tract symptoms of benign prostatic hyperplasia (BPH).

Materials And Methods: A total of 125 patients with lower urinary tract symptoms due to BPH were enrolled at 8 study centers. Pretreatment evaluation included determination of International Prostate Symptom Score (I-PSS), peak urinary flow rate and quality of life score.

Management of bladder outlet obstruction by insertion of stents in the radiological suite.

Intraurethral mechanical support using prosthetic devices known as stents has become an increasingly used therapeutic approach in bladder outlet obstructions. This article is an overview on the stents used in the obliterated prostate and urethra which can be inserted in a radiological suite. The insertion of each currently available stent under fluoroscopy, transabdominal and transrectal sonography is described.

Temporary metal stents in bladder outflow obstruction.

The use of stents in the management of prostatic obstruction started in 1980 with the development of the "partial catheter" by Fabian in Germany. Since then, a variety of metals and biostable and biodegradable polymers have been made into temporary or permanent stents for the management of infravesical obstructions such as benign or malignant prostatic enlargement, bladder neck stenoses, or urethral strictures. This paper is an overview of two generations of temporary metal stents used in the patients with infravesical obstruction.

Overview: role of stents in urology.

Catheterization of the urinary tract for drainage is the mainstay of urologic manipulations. Although the material of which the catheters are made changed during the years, they all remained external communicating devices, causing ascending infections and discomfort. A concept of completely internal catheters for use in urology developed during the last few decades.

Dose perturbation due to the presence of a prostatic urethral stent in patients receiving pelvic radiotherapy: an in vitro study.

Temporary metallic intraprostatic stent is a new alternative treatment for patients with urinary obstructive syndrome caused by prostate cancer. Definitive radiotherapy is a treatment of choice for localized prostate cancer. This study evaluates in vitro the effect of a urethral intraprostatic metallic stent on the dose absorbed by the surrounding tissue.

A new continent vesicostomy technique: preliminary report.

Purpose: A continent vesicostomy was constructed without use of segments taken from other organs, providing a continent and esthetically acceptable stoma.

Materials And Methods: We used this technique in 4 female and 3 male patients. A bladder wall flap with the base near the bladder neck was tubularized creating a neourethra.

The use of a removable stent in patients with prostate cancer and obstruction.

Purpose: A second generation temporary stent (ProstaCoil*) was inserted into the prostatic urethra of patients with obstruction due to prostate cancer to allow spontaneous voiding during hormonal therapy given to decrease the size of the prostatic mass.

Materials And Methods: The stent was inserted under fluoroscopic guidance using topical anesthesia in 27 patients (mean age 77 years) who presented with urinary retention due to advanced carcinoma of the prostate. All patients underwent operative or nonoperative hormonal therapy shortly after insertion of the stent.

Comparison between first-generation (fixed-caliber) and second-generation (self-expanding, large caliber) temporary prostatic stents.

In this study our aim was to compare a first-generation intraprostatic stent (Prostakath) with a second-generation one (ProstaCoil) in patients with prostatic obstruction. The comparison was made in terms of ease of insertion, need for repositioning, migration, infection, stone formation and length of time in place. One hundred and seventeen patients with an age range of 52-94 years were included in this study.