Guide wire with hydrophilically coated tip

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/09 (2006.01)

Patent

CA 2251685

A guide wire (20) including a lubricous distal portion (22) and a less lubricous intermediate portion (24) proximal of said distal portion. One guide wire provides a highly lubricous distal portion with a hydrophilic layer and a less lubricous intermediate portion with a hydrophobic layer. Another guide wire provides a lubricous distal portion with a polymer tip (36) that is itself hydrophilic. Yet another guide wire provides a less lubricous intermediate portion using a stainless steel coil (42) helically wound around the tapering intermediate portion. The coil is preferably coated with a hydrophobic coating such as PTFE or silicone. The coil can either abut the distal portion proximal end or extend into the distal portion interior.

L'invention porte: sur un fil-guide (20) comprenant une partie distale (22) lubrifiée, et une partie intermédiaire (24) moins bien lubrifiée en amont de ladite partie distale: sur un fil-guide comprenant une partie distale fortement lubrifiée revêtue d'une couche hydrophile, et une partie intermédiaire revêtue d'une couche hydrophobe; sur un autre fil-guide comprenant une partie distale lubrifiée dont l'extrémité (36), de polymère, est elle-même hydrophile; sur un autre fil-guide comprenant une partie intermédiaire comportant un enroulement hélicoïdal (42) d'acier inox entourant une partie intermédiaire effilée, l'enroulement étant de préférence revêtue d'une couche hydrophobe, par exemple de PTFE ou de silicone, et pouvant soit buter sur l'extrémité proximale de la partie distale, soit se prolonger à l'intérieur de la partie distale.

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