Irradiation catheter with expandable source

Details Irradiation catheter with expandable source Irradiation catheter with expandable source

A - Human Necessities

61

M

A61M 36/12 (2006.01) A61N 5/10 (2006.01)

Patent

CA 2334198

This patent is a radiation delivery system (10) having an expandable radiation source (14) made of a pliable material. The source body is made of a material such as foam or sponge, or a fibrous material such as soft bristles of a pipe cleaner. The spongy or fibrous material is made radioactive by the implantation of a radioactive isotope. The radioactive isotope can be located throughout the pliable source material (14), or concentrated in a desired region, such as the surface or near-surface region (32). The compressible radioactive source material (14), when constrained by a constraining housing (38) or catheter (38), has a very low profile. When the constraining housing (38) or catheter (38) is withdrawn, the expandable source material (14) expands, and the expandable source material (14) is brought into direct contact with a vessel wall.

L'invention concerne un système d'irradiation (10) doté d'une source de rayonnement extensible (14) en matériau souple. Le corps de la source est en matériau du type mousse ou éponge, ou bien en matériau fibreux du type soies souples de nettoie-pipe. Le matériau spongieux ou fibreux est rendu radioactif par implantation d'un isotope radioactif, lequel peut être situé dans tout le matériau souple de la source (14), ou concentré dans une zone déterminée, comme la surface ou une zone proche de la surface (32). Le matériau de la source radioactive compressible (14), une fois contraint par un boîtier contraignant (38) ou un cathéter exerçant une contrainte (38), a un profil très faible. Lorsqu'on retire le boîtier ou le cathéter considérés (38, 38), le matériau extensible de la source (14) s'étend, et il (14) est mis en contact direct avec une paroi de vaisseau sanguin.

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