New Metallic Ureteral Stents: Improved Tensile Strength and Resistance to Extrinsic Compression

Hendlin, Kari; Korman, Emily; Monga, Manoj

doi:10.1089/end.2011.0332

Cited by 19 publications

(12 citation statements)

References 16 publications

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“…3 Both designs have been supported by in vitro studies revealing improved intraluminal and, in the case of TUS, extraluminal flow in the face of compression. [7][8][9] Nearly a dozen articless have reported on the clinical outcomes of metal ureteral stents since the original report in 2007 by Wah and colleagues. [10][11][12][13][14][15][16][17] The reports range in size from 2 to 59 renal units and cite stent failure rates that range from 0% to 100%.…”

Section: Discussionmentioning

confidence: 99%

Tandem Ureteral Stents for the Decompression of Malignant and Benign Obstructive Uropathy

Elsamra

Motato

Moreira

et al. 2013

Journal of Endourology

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Section: Discussionmentioning

confidence: 99%

Tandem Ureteral Stents for the Decompression of Malignant and Benign Obstructive Uropathy

Elsamra

Motato

Moreira

et al. 2013

Journal of Endourology

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“…). These metallic reinforced stents provide a higher resistance to external compression, a higher stiffness (tensile strength) and a higher elastic moduli compared with non‐metal stents . The reason for these favorable mechanical properties lies not only in the increased comparative strength of metal over polymer materials, but also in the spiral design of metallic stents, which allows for coils to lean rather than buckle under force (Fig.…”

Section: Metallic Ureteral Stentsmentioning

confidence: 99%

Stenting for malignant ureteral obstruction: Tandem, metal or metal‐mesh stents

et al. 2015

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Abbreviations & Acronyms LUTS = lower urinary tract symptoms MMS = metal-mesh stents MUO = malignant ureteral obstruction PCN = percutaneous nephrostomy TUS = tandem ureteral stents UTI = urinary tract infection Abstract: Extrinsic malignant compression of the ureter is not uncommon, often refractory to decompression with conventional polymeric ureteral stents, and frequently associated with limited survival. Alternative options for decompression include tandem ureteral stents, metallic stents and metal-mesh stents, though the preferred method remains controversial. We reviewed and updated our outcomes with tandem ureteral stents for malignant ureteral obstruction, and carried out a PubMed search using the terms "malignant ureteral obstruction," "tandem ureteral stents," "ipsilateral ureteral stents," "metal ureteral stent," "resonance stent," "silhouette stent" and "metal mesh stent." A comprehensive review of the literature and summary of outcomes is provided. The majority of studies encountered were retrospective with small sample sizes. The evidence is most robust for metal stents, whereas only limited data exists for tandem or metal-mesh stents. Metal and metal-mesh stents are considerably more expensive than tandem stenting, but the potential for less frequent stent exchanges makes them possibly cost-effective over time. Urinary tract infections have been associated with all stent types. A wide range of failure rates has been published for all types of stents, limiting direct comparison. Metal and metal-mesh stents show a high incidence of stent colic, migration and encrustation, whereas tandem stents appear to produce symptoms equivalent to single stents. Comparison is difficult given the limited evidence and heterogeneity of patients with malignant ureteral obstruction. It is clear that prospective, randomized studies are necessary to effectively scrutinize conventional, tandem, metallic ureteral and metal-mesh stents for their use in malignant ureteral obstruction.

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“…However, polymeric stents possess a limited ability to resist external compression forces such as those created in a malignant extrinsic ureteral obstruction. This is due to their intrinsic low strength, which often results in their reinforcement by a metal skeleton made of non-degradable alloys [9,10]. At this point, metals that can corrode would constitute the ideal materials for biodegradable ureteral stents.…”

Section: Introductionmentioning

confidence: 99%

In Vitro Degradation of Absorbable Zinc Alloys in Artificial Urine

et al. 2019

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Absorbable metals have potential for making in-demand rigid temporary stents for the treatment of urinary tract obstruction, where polymers have reached their limits. In this work, in vitro degradation behavior of absorbable zinc alloys in artificial urine was studied using electrochemical methods and advanced surface characterization techniques with a comparison to a magnesium alloy. The results showed that pure zinc and its alloys (Zn–0.5Mg, Zn–1Mg, Zn–0.5Al) exhibited slower corrosion than pure magnesium and an Mg–2Zn–1Mn alloy. The corrosion layer was composed mostly of hydroxide, carbonate, and phosphate, without calcium content for the zinc group. Among all tested metals, the Zn–0.5Al alloy exhibited a uniform corrosion layer with low affinity with the ions in artificial urine.

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New Metallic Ureteral Stents: Improved Tensile Strength and Resistance to Extrinsic Compression

Cited by 19 publications

References 16 publications

Tandem Ureteral Stents for the Decompression of Malignant and Benign Obstructive Uropathy

Tandem Ureteral Stents for the Decompression of Malignant and Benign Obstructive Uropathy

Stenting for malignant ureteral obstruction: Tandem, metal or metal‐mesh stents

In Vitro Degradation of Absorbable Zinc Alloys in Artificial Urine

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