Surgical stent having a streamlined contour

Details Surgical stent having a streamlined contour Surgical stent having a streamlined contour

A - Human Necessities

61

F

A61F 2/94 (2006.01)

Patent

CA 2286665

A surgical stent (10) is provided which is formed of a plurality of stent segments (40) having a streamlined contour. Each stent segment (40) includes an outer surface (42) spaced from an inner surface (44). The inner surface (44) is bordered by inner edges (54), (56) and the outer surface (42) is bordered by outer edges (50), (52). The outer edges (50), (52) have a contour defined by outer curves (64), (66) and the inner edges (54), (56) have a contour defined by inner curves (60), (62). Radii of curvature for the inner curves (70), (72) are greater than radii of curvature for the outer curves (64), (66). The inner surface (44) is thus streamlined for passage of blood/bodily fluid (B) adjacent the inner surface (44) and the outer surface (42) is particularly configured for maximum adherence without irritation to an inner surface (S) of a body lumen (L), such as an artery. The surfaces (42), (44) of the stent segment (40) are provided with a surface finish of sufficient smoothness to further enhance blood/fluid flow (B) adjacent the stent segment (40) and to minimize irritation of tissues forming the inner surface (S) of the body lumen (L) in which the surgical stent (10) is implanted.

Cette invention se rapporte à un extenseur chirurgical (10), formé de plusieurs segments d'extenseur (40) ayant un contour profilé. Chaque segment d'extenseur (40) comporte une surface externe (42) distante d'une surface interne (44). La surface interne (44) est flanquée de bords internes (54, 56) et la surface externe (42) est flanquée de bords externes (50, 52). Les bords externes (50, 52) présentent un contour défini par des courbes externes (64, 66) et les bords internes (54, 56) présentent un contour défini par des courbes internes (60, 62). Les rayons de courbure des courbes internes (70, 72) sont supérieurs aux rayons de courbure des courbes externes (64, 66). La surface interne (44) se trouve ainsi profilée pour permettre le passage du sang ou du fluide corporel (B) à proximité adjacente de la surface interne (44) et la surface externe (42) est configurée de façon particulière pour produire une adhérence maximum sans irritation d'une surface interne (S) d'un passage corporel (L), tel qu'une artère. Les surfaces (42, 44) du segment d'extenseur (40) sont dotées d'un fini de surface suffisamment lisse pour accroître davantage l'écoulement de sang ou de fluide (B) à proximité adjacente du segment d'extenseur (40) et pour réduire au minimum l'irritation des tissus formant la surface interne (S) du passage corporel (L) dans lequel est implanté l'extenseur chirurgical (10).

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