A - Human Necessities – 61 – L
Patent
A - Human Necessities
61
L
A61L 29/00 (2006.01) A61F 2/02 (2006.01) A61F 2/06 (2006.01) A61L 27/00 (2006.01) A61L 31/00 (2006.01) A61L 31/04 (2006.01) A61L 31/14 (2006.01)
Patent
CA 2252607
Elastically deformable medical devices, such as stems, having improved speed and degree of shape recovery are made by treating shaped hydrogels containing a polymer with a solution containing at least one elasticity agent, which may be nonionic or ionic. For example, polysaccharide-based hydrogels, such as barium alginate, are formed into tubing, shaped into pigtail stents, and exposed to an aqueous solution containing an elasticity agent such as potassium ions, sodium ions, sorbitol, glucose, citric acid, mannitol, dulcitol, or glycerol. The solution may also contain a cross-linking agent, such as calcium ions, to achieve the desired degree of elasticity.
L'invention concerne la fabrication d'instruments médicaux à déformation élastique, tels que des drains tuteurs, dont la vitesse et le degré de récupération de forme sont améliorés par traitement d'hydrogels formés contenant un polymère composé d'une solution ayant au moins un agent d'élasticité, celui-ci pouvant être non ionique ou ionique. Par exemple, des hydrogels à base de polysaccharide, tels que de l'alginate de baryum, sont transformés en tuyaux flexibles, façonnés sous forme de drains tuteurs enroulés, et exposés à une solution aqueuse contenant un agent d'élasticité tel que des ions de potassium, des ions de sodium, du sorbitol, du glucose, de l'acide citrique, du mannitol, du dulcitol ou du glycérol. La solution peut également contenir un agent de réticulation, tel que des ions de calcium, qui permet d'atteindre le degré d'élasticité souhaité.
Boston Scientific Limited
Fetherstonhaugh & Co.
Hercules Incorporated
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