Flow directed catheter with hydrophilic distal end

Details Flow directed catheter with hydrophilic distal end Flow directed catheter with hydrophilic distal end

A - Human Necessities

61

M

A61M 25/00 (2006.01) A61M 25/01 (2006.01)

Patent

CA 2214794

A flow directed catheter (2) includes a hollow catheter body (4) having a distal section (16) constructed of a hydrophilic material. The hydrophilic distal section, typically a hydrogel, has an equilibrium water content of about 80 % water by mass when hydrated. The hydrophilic distal section is soft and supple but substantially inelastic and tough enough to permit use of guide wires to help direct the catheter through difficult areas (27) and also allow a wide range of therapeutic agents to be delivered to the target site (32, 34, 36). Both the inside and outside surfaces of the catheter body can be made lubricious by surface modification or by application of a secondary, lubricious coating.

Cathéter flottant (2) comportant un corps creux (4) pourvu d'une partie distale (16) en matériau hydrophile. Ladite partie distale hydrophile, typiquement un hydrogel, présente une teneur en eau d'équilibre d'environ 80 % d'eau par masse lorsqu'elle est hydratée. Cette partie distale hydrophile est molle et souple mais sensiblement inélastique et assez résistante pour permettre l'utilisation de fils-guides destinés à aider à diriger le cathéter à travers des zones difficiles (27); elle permet également d'administrer une large gamme d'agents thérapeutiques au site cible (32, 34, 36). Les faces interne et externe du corps du cathéter peuvent toutes deux être lubrifiées par modification de surface ou par application d'un revêtement lubrifié secondaire.

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