EP1534377A4

Medical pad, and method for making and using

Abstract

A germicidal absorptive material for use in surgical packings, wound bandages, sanitary tampons and bed sore prevention and/or treatment uses is provided by a foam-like matrix of hydrophilic polyurethane polymer to which application-specific loads of a germicidal disinfectant dye have been made. Polyurethane polymer of various densities and thicknesses exhibits an exceptional ability to absorb different levels of a number of disinfectant dyes, both basic and acidic, such as gentian violet and methylene blue, respectively. The relationship between dye-load and application-specific uses permits a totally-bound gentian violet pad to be used as a conventional bandage or pad on a surface wound with the capability of preventing the incursion of external pathogens from entering the wound through the pad, where the pathogens are killed by the bound-dye. The wound exudate is absorbed safely by the pad, where wound-originating pathogens are also killed. When the loaded dye's concentration is saturated by exceeding the bound-dye limit, the limited free-dye is available to be delivered to the wound, particularly deep wounds, to rapidly kill pathogens in the wound. The free dye delivery pad can then be replaced by the bound-dye pad to absorb the wound exudate.

Term

Term ended

Projected expiry passed 20 August 2023, 3.1 years ago.

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Every citation, both ways

Citations
DocumentRelationOfficeCategoryCited duringRelevant claims
EP0106439A1CitesEuropean Patent Office (EPO)XYSearch report8
WO0160423A1CitesWorld Intellectual Property Organization (WIPO)XYSearch report8
EP0181184A2CitesEuropean Patent Office (EPO)YSearch report2
EP0256893A2CitesEuropean Patent Office (EPO)ASearch report1-7
WO03002163A1CitesWorld Intellectual Property Organization (WIPO)APSearch report1-10
EP0541390A1CitesEuropean Patent Office (EPO)XYSearch report8
GB1450201ACitesUnited KingdomXYSearch report8
US3978855ACitesUnited States of AmericaXYSearch report8
US4045238ACitesUnited States of AmericaYSearch report1-7
US4541426ACitesUnited States of AmericaXYSearch report8
US5811471ACitesUnited States of AmericaDYSearch report1-7,9,10
US5973221ACitesUnited States of AmericaXYSearch report8
US6361786B1CitesUnited States of AmericaYSearch report1-7,9,10
WO9101706A1CitesWorld Intellectual Property Organization (WIPO)XYSearch report8
EP0181184ACitesEuropean Patent Office (EPO)
WO9101706ACitesWorld Intellectual Property Organization (WIPO)
WO0160423ACitesWorld Intellectual Property Organization (WIPO)
WO03002163ACitesWorld Intellectual Property Organization (WIPO)