Antibacterial coated medical implants

A - Human Necessities – 61 – L

Patent

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Details

A61L 27/00 (2006.01) A61K 31/65 (2006.01) A61L 27/54 (2006.01) A61L 29/00 (2006.01) A61L 29/16 (2006.01) A61L 31/00 (2006.01)

Patent

CA 2130339

An implantable medical device having long lasting resistance to staphylococcal biofilm colonization is provided. Implantible medical devices such as catheters, shunts, prosthesis, pacemakers, etc, are susceptible to colonization by biofilm adherent microorganisms, especially staphylococci. While systemic staphylococcal infections are effectively treated by many antibiotics, vancomycin being the antibiotic of choice, this same bacteria when encased in biofilm adhering to indwelling medical devices is generally resistant to antibiotic treatment. By the present invention, the combination of rifampin and minocycline or the combination or rifampin and novobiocin when coated on the surfaces of implantable medical devices unexpectedly provides superior antibacterial activity against staphylococcal biofilm colonization on the coated surface of indwelling medical devices.

On décrit un dispositif médical implantable présentant une résistance prolongée à la colonisation par les biofilms de staphylocoques. Les dispositifs médicaux implantables comme les cathéters, les pontages, les prothèses, les stimulateurs cardiaques etc. sont en effet vulnérables à la colonisation par des micro-organismes constituant des biofilms adhésifs et notamment ceux des staphylocoques. Si on peut traiter efficacement des infections systémiques à staphylocoques avec de nombreux antibiotiques, la vancomycine étant l'antibiotique prioritaire, ces mêmes bactéries, une fois piégées dans un biofilm qui adhère aux dispositifs médicaux implantés, résistent en général aux traitements antibiotiques. L'invention concerne l'utilisation de la rifampine, combinée avec la minocycline ou la novobiocine, dans un revêtement destiné aux surfaces des implants médicaux et offrant, contre toute attente, une activité antibactérienne inégalée contre la colonisation des surfaces d'implants ainsi revêtues par des biofilms contenant des staphylocoques.

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