Stent for holding passageways open

A - Human Necessities – 61 – L

Patent

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Details

A61L 31/08 (2006.01) A61L 31/02 (2006.01) A61L 31/14 (2006.01) A61F 2/06 (2006.01)

Patent

CA 2368751

A stent made of metallic and/or non-metallic material that can be implanted into tubular structures or other body cavities is coated with nanoscale particles that consist of a paramagnetic core and at least one shell adsorbed to it which is durably bonded to the stent surface. This coating makes it possible to selectively and homogeneously heat up the implant by applying an alternating magnetic field with a clinically tolerable combination of field strength and frequency, thereby achieving high power absorption and, on the one hand, a temperature level that enhances the growing-in of the implant by enhancing cell proliferation, on the other hand, a temperature range in which a restenosed implant can be regenerated. Also, it facilitates position detection.

L'invention concerne un tuteur en matière métallique et/ou non métallique implantable dans des structures de type conduit ou dans d'autres cavités organiques. Ledit tuteur est recouvert uniformément de particules de l'ordre du nanomètre comprenant un noyau paramagnétique et au moins une coque adsorbée sur ledit noyau, qui assure une jonction durable avec la surface du tuteur. Ce revêtement permet, par action d'un champ magnétique alternatif dans une combinaison intensité de champ/fréquence tolérable sur le plan clinique, à une puissance absorbée élevée, de chauffer de manière homogène et sélective l'implant d'une part dans une plage de températures favorisant sa croissance interne par régénération cellulaire et d'autre part dans une plage de températures régénérant un implant resténosé, ainsi que de déterminer des positions.

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