Success of Ureteral Stents for Intrinsic Ureteral Obstruction

Wenzler, David; Kim, Simon P.; Rosevear, Henry; Faerber, Gary J.; Roberts, William W.; Wolf, J. Stuart

doi:10.1089/end.2007.0201

Cited by 57 publications

(37 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, in a study reporting 14 years of experience in the management of extrinsic ureteral obstruction, 27.5% of UUs with MUO had insertion failure (11). By contrast, in one study published in 2008, only 12.2% of UUs with MUO had insertion failure (7). In the present cohort, the failure rate was 34.65% and this was higher than that in recent studies.…”

Section: Discussioncontrasting

confidence: 70%

“…The use of ureteral stents to bypass the obstruction is common in clinical practice, and RUS is more advantageous than PCN, particularly in view of the limited life expectancy of patients with advanced malignancies (3,4,7). However, the incidence of insertion failure is markedly higher in cases of MUO, ranging from 15.0 to 27.5% (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). This high failure rate may be associated with extrinsic compression or invasion of the ureter by tumors, which may lead to the bending and deformation of the ureter, which then increases resistance during intubation in the majority of advanced malignancies (15).…”

Section: Discussionmentioning

confidence: 99%

“…Stent failure was defined as any ureteral unit (UU) in which stent insertion failed or any UU that continued to cause symptoms for the patient after stent placement (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). Stents were inserted by three experienced urological surgeons on an outpatient basis, using local anesthesia.…”

Section: Methodsmentioning

confidence: 99%

“…The advantages of this procedure are its simplicity and convenience, with no requirement for hospitalization, and a cheaper cost. However, cystoscopic ureteral stent insertion is a challenging procedure even for the most experienced urologists, with a mean failure rate of 15.0-27.5% (3)(4)(5)(6)(7)(8)(9)(10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Predicting the failure of retrograde ureteral stent insertion for managing malignant ureteral obstruction in outpatients

et al. 2015

View full text Add to dashboard Cite

Abstract. Malignant ureteral obstruction (MUO) is an unpropitious sign that is commonly observed in patients with advanced incurable cancer. The present study aimed to evaluate predictive factors for the failure of retrograde ureteral stent insertion in the management of MUO in outpatients. A total of 164 patients with MUO were retrospectively assessed in this study. Clinical factors, including age, gender, type of malignancy, level of obstruction, cause of obstruction, pre-operative creatinine level, degree of hydronephrosis, condition of the contralateral ureter, prior radiotherapy, Eastern Cooperative Oncology Group performance status (ECOG PS), bladder wall invasion and technical failure, were recorded for each case. Univariate and multivariate logistic regression analyses were used to investigate the risk factors for predicting the failure of retrograde ureteral stent insertion. In total, 38 out of 164 patients experienced bilateral obstruction, therefore, a total of 202 ureteral units were available for data analysis. The rate of insertion failure in MUO was 34.65%. Multivariate analyses identified ECOG PS, degree of hydronephrosis and bladder wall invasion as independent predictors for insertion failure. Overall, the present study found that rate of retrograde ureteral stent insertion failure is high in outpatients with MUO, and that ECOG PS, degree of hydronephrosis and bladder invasion are potential independent predictors of insertion failure.

show abstract

Section: Discussioncontrasting

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Predicting the failure of retrograde ureteral stent insertion for managing malignant ureteral obstruction in outpatients

et al. 2015

View full text Add to dashboard Cite

show abstract

“…They are minimally invasive, easy to insert, obstruction can be easily relieved in most cases and they are proven to be invaluable in urological practice. Although their success rates appear high (around 88%) in intrinsic ureteric obstruction in some series [2] , there are high failure rates (35-52%) of indwelling ureteric stents in malignant extrinsic ureteric compression [3][4][5] . Failure is mainly due to recurrent stent occlusion and inability to place the stent endoscopically.…”

Section: Introductionmentioning

confidence: 99%

Use of a Segmental Thermoexpandable Metal Alloy Stent in the Management of Malignant Ureteric Obstruction: A Single Centre Experience in the UK

Zaman¹,

Poullis²,

Bach³

et al. 2011

Urol Int

View full text Add to dashboard Cite

Introduction: The Memokath 051™ is a semipermanent inert metal alloy ureteric stent which can bridge strictures and, compared to double J stents, causes less bladder irritation and pain, is more resistant to external compression forces and may be more effective in patients with malignant ureteric obstruction. We present our experience with this novel stent in such cases. Methods: All suitable patients referred to us with malignancy-associated ureteric strictures over a 4-year period had ureteric Memokath 051™ stents inserted. Data on aetiology and position of the strictures as well as length of the Memokath stents used and their efficacy and complications were recorded prospectively. Results: 42 ureteric Memokath 051™ stents were inserted in 37 patients (mean age 64 years). 40.5% of strictures were related to gynaecological cancer, 21% to bowel cancer, 14% were post radiation, 14% occurred in prostate cancer patients and 9.5% were found in other cancers. The mean follow-up was 22 months (range 5–60 months). The main complications were stent migrations in 5, urinary tract infections in 3 and blockage of stent due to progressive transitional cell carcinoma of the ureter in 2 cases. Conclusion: Memokath 051™ ureteric stents are safe, effective and durable in the long-term treatment of malignant strictures.

show abstract