Embolus forming in-vivo indwelling coil

Details Embolus forming in-vivo indwelling coil Embolus forming in-vivo indwelling coil

A - Human Necessities

61

B

A61B 17/12 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2512456

The invention provides an embolus forming in-vivo indwelling coil having high pliability, capable of being reliably indwelled in a predetermined region, and allowing re-indwelling operation to be reliably performed, thus having high safety and high operability. The embolus forming in-vivo indwelling coil of the invention is characterized by comprising a coil main body having pliability, and an expansion suppressing member of water- swellable high polymer material that suppresses expansion of the coil main body by becoming swelled when absorbing water, and that is disposed on an inner peripheral surface and/or an outer peripheral surface of the coil main body. In the embolus forming in-vivo indwelling coil of the invention, it is preferable that the water-swellable high polymer material forming the expansion suppressing member be made of a polyvinyl alcohol series polymer.

L'invention concerne un enroulement à demeure in vivo formant embole, ayant une bonne pliabilité, capable d'être mis en place de manière sûre dans une région prédéterminée, avec possibilité d'effectuer de manière sûre une opération de remise en place, offrant ainsi une haute sécurité et une haute opérabilité. L'enroulement à demeure in vivo formant embole selon l'invention est caractérisé en ce qu'il comprend un corps d'enroulement capable de pliabilité, et un élément de suppression d'expansion, en un matériau haut polymère gonflable à l'eau, supprimant l'expansion du corps par gonflement par absorption d'eau, disposé sur une surface périphérique interne et/ou une surface périphérique externe dudit corps. Dans l'enroulement à demeure in vivo formant embole selon l'invention, il est préférable que le matériau haut polymère gonflable à l'eau formant l'élément supprimant l'expansion soit en un polymère de la série alcool polyvinylique.

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