Comparative assessment of ureteral stent biomaterial encrustation

Tunney, Michael; Keane, Patrick F.; Jones, David S.; Gorman, Seán

doi:10.1016/0142-9612(96)89780-8

Cited by 124 publications

(72 citation statements)

References 20 publications

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“…The risk of encrustation and fragmentation is dependant on the type of material of the stent. Silicone was found to be least prone to encrustation, followed by polyurethane, silitek, percuflex and hydro gel coated polyurethane (23). Fragmentations of polyurethane stents are four times as frequent as the silicone stents (9).…”

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confidence: 99%

Endourological Management of Forgotten Encrusted Ureteral Stents

2010

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Purpose: To present our experience and discuss the various endourological approaches for treating forgotten encrusted ureteral stents associated with stone formation. Materials and Methods: From July 2006 to December 2008, 14 patients (11 men and 3 women) with encrusted ureteral stents were analyzed. The average indwelling time of the stent was 4.9 years (range 1 to 12). Plain-film radiography was used to evaluate encrustation, stone burden, and fragmentation of the stents. Intravenous urogram and a Tc99m diethylene triamine penta acetic-acid renogram was used to assess renal function. Results: In seven patients, the entire stent was encrusted, in three patients the encrustation was confined to the ureteral and lower coil part of the stent, two patients had encrustation of the lower coil, and minimal encrustation was observed in two patients. Percutaneous nephrolithotomy was performed in 5 cases and retrograde ureteroscopy with intra-corporeal lithotripsy in 9 patients. Cystolithotripsy was used to manage the distal coil of the encrusted stent in eight patients. Simple cystoscopic removal of the stents with minimal encrustation was carried-out in two cases. Looposcopy and removal of the stent was performed in one patient with an ileal conduit and retained stent. Only one patient required open surgical removal of the stent. Thirteen out of 14 patients were rendered stone and stent free in one session. All except two stents were removed intact and stone analysis of encrustation and calcification revealed calcium oxalate and calcium phosphate in the majority of the cases. Conclusion: Endourological management of forgotten encrusted stents is highly successful and often avoids the need for open surgical techniques.

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confidence: 99%

Endourological Management of Forgotten Encrusted Ureteral Stents

2010

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“…23 Other factors in the series were a previous history of urolithiasis, urinary materials dissolved in high concentrations, the type of stent material, the existence of bacterial colonization, and pregnancy. 17 In our series, the average removal time was 16.31±32 months. Significant morbidity occurred in our patient with a forgotten stenting period of 85 months, leading to a nonfunctioning kidney and nephrectomy.…”

Section: Discussionmentioning

confidence: 94%

“…Silicone and polyurethane stents are least prone to encrustation. 17 Wollin et al reported that the type and duration of stenting were not significantly correlated with the amount of encrustation in their observation of removed stents. 18 Because our study was retrospective and some of the stents were placed outside our center, the materials that composed the stents were unknown.…”

Section: Discussionmentioning

confidence: 99%

Management of Forgotten Ureteral Double J Stents: Causes and Management

Anwar¹,

Farooq²,

Ayub³

et al. 2017

APMC

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Introduction: Double J stent (DJS) is a basic and valuable tool in urological practice. A forgotten DJS is not uncommon and is associated with significant morbidity and mortality. The presenting complaints may range from UTI to renal failure. Therefore, this study has been carried out to assess the clinical spectrum of this entity in our setting. Objective: To describe the clinical presentation, complications and management of forgotten DJS. Methods: This retrospective descriptive study was done at the Department of Urology, Services Institute of Medical Sciences, Lahore (SIMS) from August 2015 to December 2016. Sixteen patients with forgotten DJS were included. Each patient was studied for age, gender, presenting complains, indication of DJS, duration of stent insertion and management performed. The data was recorded on a proforma and analyzed using SPSS version 20. Results: 16 patients 68.8% (n=11) male and 31.2% (n=5) female patients were included in study. The average age was 46.38 ± 13.58 (23-65 years). The mean indwelling time of DJS was 16.31 ± 32 months. 50% of patient's had obstructive uropathy due to stones. Most patients had UTI (37.5%) at presentation while mild encrustation was the major complication encountered (43.8%). Majority of patients were not compliant to the advice for DJS removal. Conclusion: Forgotten DJS leads to multiple complications, if not intervened timely. They can be successfully removed employing least invasive endourologic techniques. Proper counseling of patient/relatives is needed to get it removed in the due time period.

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“…Silicon was found to be least prone to encrustation followed by polyurethane, silitek, percufl ex and hydrogel coated polyurethane. Fragmentation of polyurethane stents is four times as frequent as the silicon stents 20,21 .…”

Section: Discussionmentioning

confidence: 99%

Multimodal management of forgotten encrusted ureteral stents

Dongol¹,

Ghimire

2017

J. Kathmandu Med. Coll.

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Background: Forgotten ureteral stents are seen in urologic practice because of ignorance of patients or failure of physician to counsel the patients. They can cause signifi cant morbidity and pose a management and legal dilemma. Objectives: To evaluate the effi cacy and feasibility of different endourological approaches like percutaneous nephrolithotomy, ureteroscopic lithotripsy, cystolithotripsy and extracorporeal lithotripsy in the treatment of forgotten encrusted ureteral stents. Methods: Total 10 patients with forgotten encrusted double J stents from January 2013 to Nov 2015 were included. Mean age of the patients was 38.4 years (1.5 -5 years). All patients were evaluated for stent encrustation and associated stone burden by X-ray KUB and Intravenous Urography. Combined endourological procedures like percutaneous nephrolithotomy, ureteroscopic lithotripsy, cystolithotripsy and extracorporeal lithotripsy and even open surgery was done to remove these stents. The patients characteristics, indications for stenting, indwelling time, site of encrustation, hospital stay etc were all noted. Results: Total 10 patients presented with forgotten Double J stents. Out of three patients with large encrustations both in renal pelvis and urinary bladder, one patient underwent percutaneous nephrolithotomy and cystolithotripsy. Rest two patients underwent extracorporeal lithotripsy for two sessions for renal pelvic encrustation and cystolithotripsy for urinary bladder encrustation. Four patients underwent ureteroscopic and cystolithotripsy. Two patients in whom all fractured coils were in urinary bladder, underwent cystolithotripsy. All the stents were removed under C-arm fl uoroscopic guidance. In one patient, open ureterotomy was done to remove the knotted stent. Conclusion: The use of Double J stent should be limited. The combination of various endourological techniques and extracorporeal lithotripsy can achieve effective stent and stone treatment with minimal morbidity and hospital stay.

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Comparative assessment of ureteral stent biomaterial encrustation

Cited by 124 publications

References 20 publications

Endourological Management of Forgotten Encrusted Ureteral Stents

Endourological Management of Forgotten Encrusted Ureteral Stents

Management of Forgotten Ureteral Double J Stents: Causes and Management

Multimodal management of forgotten encrusted ureteral stents

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