Patent ID: 8529935

Claim:
An antibacterial hydrogel comprising water, a hyaluronic acid derivative and an antibacterial agent, wherein: the hyaluronic acid derivative comprises hyaluronic acid, or a salt thereof, of molecular weight comprised between 50,000 and 3,500,000 Da, and chains of a biodegradable and biocompatible polyester of molecular weight comprised between 3,000 and 900,000 Da grafted onto the N-acetyl-D-glucosamine moieties only of said hyaluronic acid or salt thereof, in an amount such that the derivative comprises between 1 and 15 of said polyester chains per 100 repeating unit D-glucuronic acid/N-acetyl-D-glucosamine of hyaluronic acid; the concentration of said hyaluronic acid derivative or salt thereof is comprised between 1 and 30% w/v; and the antibacterial agent is selected from the group consisting of antibiotics, antifungals metal ions and their combinations and has a concentration comprised between 0.001% and 80% w/v.