Study of the Behavior of a Bell-Shaped Colonic Self-Expandable NiTi Stent under Peristaltic Movements

Puértolas, S. (Universidad de Zaragoza) ; Bajador, E. (Universidad de Zaragoza) ; Puértolas, J.A. (Universidad de Zaragoza) ; López, E. (Universidad de Zaragoza) ; Ibarz, E. (Universidad de Zaragoza) ; Gracia, L. (Universidad de Zaragoza) ; Herrera, A. (Universidad de Zaragoza)
Study of the Behavior of a Bell-Shaped Colonic Self-Expandable NiTi Stent under Peristaltic Movements
Resumen: Managing bowel obstruction produced by colon cancer requires an emergency intervention to patients usually in poor conditions, and it requires creating an intestinal stoma in most cases. Regardless of that the tumor may be resectable, a two-stage surgery is mandatory. To avoid these disadvantages, endoscopic placement of self-expanding stents has been introduced more than 10 years ago, as an alternative to relieve colonic obstruction. It can be used as a bridge to elective single-stage surgery avoiding a stoma or as a definitive palliative solution in patients with irresectable tumor or poor estimated survival. Stents must be capable of exerting an adequate radial pressure on the stenosed wall, keeping in mind that stent must not move or be crushed, guaranteeing an adequate lumen when affected by peristaltic waves. A finite element simulation of bell-shaped nitinol stent functionality has been done. Catheter introduction, releasing at position, and the effect of peristaltic wave were simulated. To check the reliability of the simulation, a clinical experimentation with porcine specimens was carried out. The stent presented a good deployment and flexibility. Stent behavior was excellent, expanding from the very narrow lumen corresponding to the maximum peristaltic pressure to the complete recovery of operative lumen when the pressure disappears.
Idioma: Inglés
DOI: 10.1155/2013/370582
Año: 2013
Publicado en: BioMed Research International 2013 (2013), 370582 [10 pp]
ISSN: 2314-6133

Factor impacto JCR: 0.0 (2013)

Tipo y forma: Article (Published version)
Área (Departamento): Traumatología y Ortopedia (Departamento de Cirugía, Ginecología y Obstetricia)
Área (Departamento): Medicina (Departamento de Medicina, Psiquiatría y Dermatología)
Área (Departamento): Expresión Gráfica de la Ingeniería (Departamento de Ingeniería de Diseño y Fabricación)
Área (Departamento): Mec. de Medios Contínuos y Teor. de Estructuras (Departamento de Ingeniería Mecánica)
Área (Departamento): Ciencia de los Materiales e Ingeniería Metalúrgica (Departamento de Ciencia y Tecnología de Materiales y Fluidos)

Exportado de SIDERAL (2017-09-11-12:21:28)

Este artículo se encuentra en las siguientes colecciones:
articulos > articulos-por-area > ciencia_de_los_materiales_e_ingenieria_metalurgica
articulos > articulos-por-area > mec._de_medios_continuos_y_teor._de_estructuras
articulos > articulos-por-area > expresion_grafica_de_la_ingenieria
articulos > articulos-por-area > traumatologia_y_ortopedia
articulos > articulos-por-area > medicina

 Notice créée le 2016-11-30, modifiée le 2017-09-11

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