1. Antimicrobial cannula sustained release portion for placement in the human body through which water can pass biological fluids, comprising: a tube having an inner surface bounding an inner lumen and an outer surface, said tube having a polymer matrix and an antimicrobial agent located within at least part of the polymer matrix, the polymer matrix comprises a vulcanized silicone rubber, and the antimicrobial agent is able to diffuse from the polymer th matrix into an aqueous biological environment when the polymeric matrix comes into contact with an aqueous biological medium, wherein at least the final part of the polymer matrix near the outer surface comprises an antimicrobial agent in an amount from about 10% to about 60% by weight, the amount of antimicrobial agent in the final part of the polymer matrix and the solubility of the antimicrobial agent together provide a potential for a sustained release diffusion of the antimicrobial agent in the aqueous biol -meteorological fluids within the human body during normal therapeutic use of the cannula within the human body, while the aqueous biological fluids do not become saturated with the antimicrobial agent, so that the antimicrobial agent in the final portion of the polymeric matrix can continue to diffuse into the aqueous biological fluids within the human body in an amount effective to prevent the proliferation of certain bacteria in the immediate vicinity of the cannula in aqueous biological fluids for at least ca.1. Антимикробная канюля с пролонгированным высвобождением для размещения в части тела человека, через которую могут проходить водные биологические текучие среды, содержащая:трубку с внутренней поверхностью, ограничивающей внутренний просвет, и наружной поверхностью, при этом указанная трубка имеет полимерную матрицу и антимикробное средство, находящееся внутри по меньшей мере части полимерной матрицы,причем полимерная матрица содержит вулканизованный силоксановый каучук, а антимикробное средство спо
