Antimicrobial devices and compositions
View Patent ↗The present invention comprises methods and compositions for antimicrobial devices comprising metal containing compositions which are resistant to heat and light discoloration. The metal containing compositions may comprise salts or complexes of silver, copper or zinc. In one aspect the compositions comprise silver salts. In another aspect, the compositions comprise silver complexes. In one aspect, the metal salts may comprise metal salts of saccharin, acesulfame, long chain fatty acids, and alkyl dicarboxylic acids. The compositions further comprise polymers which form salts or complexes with silver, copper or zinc. The methods of the present invention comprise treating devices with the metal containing compositions, including, but not limited to, such devices as woven wound care materials, catheters, patient care devices, and collagen matrices. The present invention further comprises treatment of humans and animals with the antimicrobial devices described herein.
1. An antimicrobial medical device, comprising at least one surface contacted by a composition comprising silver saccharinate, wherein the at least one surface is resistant to discoloration by heat and light, wherein the molar ratio of saccharinate to silver is between 1 and 1.5, and wherein the silver saccharinate is a compound formed from a chemical reaction between a silver salt and a saccharinate salt.
2. The device of claim 1 , wherein the device comprises a hydrophilic matrix device, comprising cellulose ether derivatives, hydroxyl alkyl cellulose ether derivatives, hydroxyl alkyl cellulose derivatives or mixtures thereof; a matrix device of cotton, rayon, acrylics, acetate fibers, alginates or other synthetic or natural polymers or blends; a moisture containing wound dressings; a monitor lead; a wound dressing; a hydrated plastic implant; a hydrocolloid dressing; a dressing used in wet therapy; a superabsorbent foam; a hydrophilic polyurethane foam; an activated charcoal dressing; a compress; a xeroform petrolatum dressing; a venous, urinary or pain management system catheter; a stent; a guidewire; a shunt; a cannulae; a catheter adapter or other solid or hollow tubular device; a tracheal tube; a contact lens case; a nebulizer; sutures; an incontinence product; a feminine hygiene product; an ostomy pouch; an ostomy plug; a respiratory appliance; a feeding appliance; a contact lens; a hearing aid; a haemostat; or a urine or waste collection bag.
3. The device of claim 1 , wherein the device comprises woven cotton gauzes.
4. The device of claim 1 , wherein the composition further comprises at least one active agent or additive.
5. The device of claim 4 , wherein the active agents comprise antimicrobial agents; antifungal agents, antiviral agents, growth factors, angiogenic factors, anaesthetics, mucopolysaccharides or wound healing proteins.
6. The device of claim 5 , wherein the antimicrobial agents comprise isoniazid; ethambutol; pyrazinamide; streptomycin; clofazimine; rifabutin; fluoroquinolones; ofloxacin; sparfloxacin; rifamin; azithromycin; clarithromycin; dapsone; tetracycline; erythromycin; ciprofloxacin; doxycycline; ampicillin; amphotericin B; ketoconazole; fluconazole; pyrimethamine; sulfadiazine; clindamycin; lincomycin; pentamidine; atovaquone; paromomycin; diclarazil; acyclovir; trifluorouridine; foscarnet; penicillin; gentamicin; ganciclovir; iatroconazole; miconazole; zinc-pyrithione; heavy metals including but not limited to platinum or gold, or their combined forms including salts such as halides, saccharinates or complexes with carriers or other forms; or nanoparticles of silver, zinc or copper.
7. The device of claim 1 , wherein hydrogen peroxide is present at a concentration of from about 0.01% to about 10%.
8. An antimicrobial composition comprising silver saccharinate, and wherein the composition is resistant to discoloration by heat and light, wherein the molar ratio of saccharinate to silver is between 1 and 1.5, and wherein the silver saccharinate is a compound formed from a chemical reaction between a silver salt and a saccharinate salt.
9. The composition of claim 8 , wherein the composition further comprises suspensions, lotions, creams, ointments, jellies, gels, pessaries, inorganic carriers, porous glasses, oxides, silicates, talc, mica, silica, titania, zirconia, insoluble polymeric microspheres, hydroxy apatite, cellulose powder, chitin, chitosan, cross-linked polymers or topical gels.
10. The composition of claim 8 , wherein the composition further comprises at least one active agent or additive.
11. The composition of claim 10 , wherein the active agents comprise antimicrobial agents, antifungal agents, antiviral agents, growth factors, angiogenic factors, anaesthetics, mucopolysaccharides or wound healing proteins.
12. The composition of claim 11 , wherein the antimicrobial agents comprise isoniazid; ethambutol; pyrazinamide; streptomycin; clofazimine; rifabutin; fluoroquinolones; ofloxacin; sparfloxacin; rifampin; azithromycin; clarithromycin; dapsone; tetracycline; erythromycin; ciprofloxacin; doxycycline; ampicillin; amphotericin B; ketoconazole; fluconazole; pyrimethamine; sulfadiazine; clindamycin; lincomycin; pentamidine; atovaquone; paromomycin; diclarazil; acyclovir; trifluorouridine; foscarnet; penicillin; gentamicin; ganciclovir; iatroconazole; miconazole; zinc-pyrithione; heavy metals including but not limited to platinum or gold, or their combined forms including salts such as halides, saccharinates or complexes with carriers or other forms; or nanoparticles of silver, zinc or copper.
13. The composition of claim 8 , wherein hydrogen peroxide is present at a concentration of from about 0.01% to about 10%.