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Corrosion failure of nitinol stents in the upper gastrointestinal tract: The role of surface finishes and the importance of an appropriate test environment

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43928538" target="_blank" >RIV/60461373:22310/23:43928538 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/00216208:11150/23:10469587

  • Výsledek na webu

    <a href="https://www.sciencedirect.com/science/article/pii/S0254058423010982?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0254058423010982?via%3Dihub</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.matchemphys.2023.128390" target="_blank" >10.1016/j.matchemphys.2023.128390</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Corrosion failure of nitinol stents in the upper gastrointestinal tract: The role of surface finishes and the importance of an appropriate test environment

  • Popis výsledku v původním jazyce

    Esophageal nitinol stents are an established method for treating swallowing difficulties caused by obstructing cancer. As a consequence of improved patient survival, stent failure and an increasing need for re-intervention is a rapidly emerging problem. This research investigates the influence of different quality of raw metal alloys in combination with production technology on corrosion resistance. Four different international stent manufacturers produced samples of their standard stents from nitinol sourced from three different alloy manufacturers. The corrosion resistance was evaluated by cyclic potentiodynamic scans according to the ASTM standards in phosphate buffered saline solution. Because of targeted application of the stent in gastrointestinal tract, the simulated gastric fluid was also used for corrosion measurement. In addition, the surface of the samples was studied by X-ray Photoelectron Spectroscopy and Mott-Schottky analysis. Results demonstrated that both, raw material and certain steps in the manufacturing process affects corrosion resistance. Conversely, other certain measures in the manufacturing process are able to reduce the impact of the base material on corrosion susceptibility. Furthermore, we could demonstrate that a key factor influencing corrosion resistance is the concentration of nickel on the surface. Current accepted standard test methods with phosphate buffered saline solution are inadequate for assessing susceptibility to corrosion by gastric acid and should take the low pH of the implanted environment into account. Understanding the corrosive process and the impact of surface finishes is key to developing stents suitable for long-term palliation. © 2023 Elsevier B.V.

  • Název v anglickém jazyce

    Corrosion failure of nitinol stents in the upper gastrointestinal tract: The role of surface finishes and the importance of an appropriate test environment

  • Popis výsledku anglicky

    Esophageal nitinol stents are an established method for treating swallowing difficulties caused by obstructing cancer. As a consequence of improved patient survival, stent failure and an increasing need for re-intervention is a rapidly emerging problem. This research investigates the influence of different quality of raw metal alloys in combination with production technology on corrosion resistance. Four different international stent manufacturers produced samples of their standard stents from nitinol sourced from three different alloy manufacturers. The corrosion resistance was evaluated by cyclic potentiodynamic scans according to the ASTM standards in phosphate buffered saline solution. Because of targeted application of the stent in gastrointestinal tract, the simulated gastric fluid was also used for corrosion measurement. In addition, the surface of the samples was studied by X-ray Photoelectron Spectroscopy and Mott-Schottky analysis. Results demonstrated that both, raw material and certain steps in the manufacturing process affects corrosion resistance. Conversely, other certain measures in the manufacturing process are able to reduce the impact of the base material on corrosion susceptibility. Furthermore, we could demonstrate that a key factor influencing corrosion resistance is the concentration of nickel on the surface. Current accepted standard test methods with phosphate buffered saline solution are inadequate for assessing susceptibility to corrosion by gastric acid and should take the low pH of the implanted environment into account. Understanding the corrosive process and the impact of surface finishes is key to developing stents suitable for long-term palliation. © 2023 Elsevier B.V.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    20501 - Materials engineering

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/FW03010583" target="_blank" >FW03010583: Řešení ochrany nitinolových stentů před korozním prostředím lidského organismu a nové přístupy při jejich testování</a><br>

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Ostatní

  • Rok uplatnění

    2023

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    MATERIALS CHEMISTRY AND PHYSICS

  • ISSN

    0254-0584

  • e-ISSN

  • Svazek periodika

    309

  • Číslo periodika v rámci svazku

    November

  • Stát vydavatele periodika

    NL - Nizozemsko

  • Počet stran výsledku

    6

  • Strana od-do

    1-6

  • Kód UT WoS článku

    001081100700001

  • EID výsledku v databázi Scopus

    2-s2.0-85169599180