Journal of voice : official journal of the Voice Foundation · 2013
Degradation of silicone rubber causes Provox 2 voice prosthesis malfunctioning.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Fusconi Massimo, Taddei Anna Rita, Gallo Andrea, Conte Michela, De Virgilio Armando, Greco Antonio, Lo Vasco Vincenza Rita, Macrì Gian Franco, Roma Rocco, Volpini Fabrizio, Benincasa Anna Teresa, De Vincentiis Marco
Аннотация
OBJECTIVE/HYPOTHESIS: Provox 2 voice prosthesis requires periodic replacement due to biofilm proliferation which causes malfunctioning of the valve. The aim of this study was to show that Provox 2 voice prosthesis malfunctioning is due not only to valve obstruction caused by biofilm but also to the silicone variations.
DESIGN METHODS: Prospective study on the malfunction of Provox2 voice prostheses.
METHODS: Through photographic and electron microscopic assessment, the authors studied nine Provox 2 voice prostheses, which were removed due to malfunctioning.
RESULTS: Findings revealed that the silicone undergoes a degenerative process, thus causing the surface to become rough, deformed, swollen, and translucent. Furthermore, electron microscopy confirmed the presence of immune system cells and biofilm on the prosthesis surface and their role in creating a structural nonhomogenous structure in the silicone, which is deformed due to the presence of "crests" caused by material degeneration.
CONCLUSION: The degenerative process of the silicone seems to be related to the oxygen present in the trachea and esophagus and to the production of oxygen-free radicals on the biofilm's part and the immune system.
DESIGN METHODS: Prospective study on the malfunction of Provox2 voice prostheses.
METHODS: Through photographic and electron microscopic assessment, the authors studied nine Provox 2 voice prostheses, which were removed due to malfunctioning.
RESULTS: Findings revealed that the silicone undergoes a degenerative process, thus causing the surface to become rough, deformed, swollen, and translucent. Furthermore, electron microscopy confirmed the presence of immune system cells and biofilm on the prosthesis surface and their role in creating a structural nonhomogenous structure in the silicone, which is deformed due to the presence of "crests" caused by material degeneration.
CONCLUSION: The degenerative process of the silicone seems to be related to the oxygen present in the trachea and esophagus and to the production of oxygen-free radicals on the biofilm's part and the immune system.