Enhanced biocompatibility coatings for medical implants

A - Human Necessities – 61 – L

Patent

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A61L 33/00 (2006.01)

Patent

CA 2318736

Enhanced biocompatibility coatings for medical implants and acute exposure medical devices are disclosed in conjunction with methods for their production and use. The biocompatible coatings are particularly advantageous when used in conjunction with high surface area materials such as porous resins, fabrics and textiles and comprise ionically bound complexes of at least one anticlotting compound and at least one quaternary ammonium compound having greater than 0.15 and less than 40 IU of anticlotting compound per CM2. The coatings are produced by forming a solution of the complex having a concentration greater than 0.005 % and less than 1.5 % w/v which is applied to the surface and allowed to dry. The coatings reduce the propensity for thrombus deposition without impairing healing and tissue ingrowth into the device.

On décrit des revêtements pour implants médicaux présentant une biocompatibilité améliorée, des dispositifs médicaux à irradiation aiguë et des procédés de production desdits éléments. Ces revêtements biocompatibles sont particulièrement avantageuses lorsqu'ils sont utilisés en association avec des matériaux ayant une étendue de la surface élevée (résines poreuses, tissus et textiles, par exemple), et comprennent des complexes liés par migration des ions d'au moins un composé anticoagulant et d'au moins un composé d'ammonium quaternaire présentant plus de 0,15 et moins de 40 IU du composé anticoagulant par cm?2¿. Ces sont produits par formation d'une solution du complexe ayant une concentration supérieure à 0,005 et inférieure à 1,5 p/v qu'on applique sur la surface et laisse sécher. Ces revêtements réduisent la propension au dépôt de thrombus sans nuire à la guérison ou à la croissance interne du tissu à l'intérieur du dispositif.

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