Endoscope disinfectant
AssigneeWhiteley Corporation Pty. Ltd.
InventorsTrevor Glasbey, Nicholas Alan Roberts, Gregory Stuart Whiteley
Life of this patent
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Abstract
A working disinfectant solution comprising peracetic acid, at least one non-ionic surfactant, and at least one corrosion inhibitor, prepared by the dilution of either a single-part or two-part concentrate for use in the disinfection or sterilisation of reusable medical devices such as endoscopes. The working solution exhibits rapid wetting characterised by a dynamic surface tension less than about 50 mN/m at a surface age of 250 ms and less than about 46 mN/m at a surface age of 500 ms.
Claims20
A working disinfectant solution for the sterilisation or disinfection of a medical device providing at least a 6 log10 reduction in both bacteria and spores, wherein said solution comprises an aqueous dilution of a disinfectant concentrate, comprising:
- (a) peracetic acid;
- (b) at least one non-ionic surfactant;
- and
- (c) at least one corrosion inhibitor,
- wherein said working disinfectant solution exhibits a dynamic surface tension less than about 50 mN/m at a surface age of 250 ms, and less than about 46 mN/m at a surface age of 500 ms, when measured by the Maximum Bubble Pressure method at 20-25° C.;
- wherein, upon being subjected to shaking by the Shaking Tube method at 30° C., said working disinfectant solution produces less than 16 ml of foam after 10 seconds and no observable foam after 30 seconds;
- and
- wherein the at least one corrosion inhibitor is selected from the group consisting of benzotriazole, alkali metal phosphates, alkali metal nitrate salts, alkali metal nitrite salts, 2-phosphonobutane-1,2,4-tricarboxylic acid salts, metal molybdate salts and combinations thereof.
A method of disinfecting or sterilizing a medical device providing at least a 6 log10 reduction in both bacteria and spores, which method comprises contacting said medical device with a working disinfectant solution comprising an aqueous dilution of a disinfectant concentrate, comprising:
- (a) peracetic acid;
- (b) at least one non-ionic surfactant;
- and
- (c) at least one corrosion inhibitor,
- wherein said working disinfectant solution exhibits a dynamic surface tension less than about 50 mN/m at a surface age of 250 ms, and less than about 46 mN/m at a surface age of 500 ms when measured by the Maximum Bubble Pressure method at 20-25° C.;
- wherein, upon being subjected to shaking by the Shaking Tube method at 30° C., said working disinfectant solution produces less than 16 ml of foam after 10 seconds and no observable foam after 30 seconds;
- and
- wherein the at least one corrosion inhibitor is selected from the group consisting of benzotriazole, alkali metal phosphates, alkali metal nitrate salts, alkali metal nitrite salts, 2-phosphonobutane-1,2,4-tricarboxylic acid salts, metal molybdate salts and combinations thereof.
Dependencies are inferred from the claim text.