Controlled depth injection device and method

A - Human Necessities – 61 – M

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A61M 5/46 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2418145

A catheter adapted to deliver therapeutic or diagnostic agents to a target tissue of a human body is disclosed. A catheter in accordance with the present invention comprises a first elongate shaft having a proximal end, a distal end, and a lumen extending therethrough, a second elongate shaft disposed within the lumen of the first elongate shaft, the first elongate shaft including a first helical member comprising a plurality of turns, the second elongate shaft including a second helical member comprising a plurality of turns. Wherein, at least one turn of the second helical member is disposed proximate at least one turn of the first helical member.

La présente invention concerne un cathéter qui est prévu pour apporter des agents thérapeutiques ou de diagnostic à un tissu cible dans un corps humain. Un cathéter selon l'invention comprend une première tige allongée présentant une extrémité proximale, une extrémité distale et une lumière s'étendant à travers ces dernières, une deuxième tige allongée située à l'intérieur de la lumière de la première tige allongée, la première tige allongée comportant un premier élément hélicoïdal comprenant une pluralité de spires, la deuxième tige allongée comprenant un deuxième élément hélicoïdal comprenant une pluralité de spires. La configuration est telle qu'au moins une spire du deuxième élément hélicoïdal est située à proximité d'au moins une spire du premier élément hélicoïdal.

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