Method for sanitizing medical equipment using microwaves

• US 6,521,178 B1
• Filed: 11/01/2000
• Issued: 02/18/2003
• Est. Priority Date: 04/30/1999
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Goldstein, Alan Scott, Hutton, Howard David
• Primary Examiner(s): Thornton, Krisanne
• Application Number:
  US09/674,475
• Time in Patent Office: 839 Days
• Field of Search: 422/21, 422/27, 422/28, 516/161, 516/372, 516/375
• US Class Current: 422/21
• CPC Class Codes: A61L 2/12 Microwaves
• CPC Class Codes: C11D 2111/20 Industrial or commercial equipment, e.g. reactors, tubes or engines
• CPC Class Codes: C11D 2111/46 applying energy, e.g. irradiation
• CPC Class Codes: C11D 3/3942 Inorganic per-compounds C11D3/3902 takes precedence
• CPC Class Codes: C11D 3/3945 Organic per-compounds C11D3/3902 takes precedence
• CPC Class Codes: C11D 3/3947 Liquid compositions
• CPC Class Codes: C11D 3/48 Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions

Abstract

A method by which medical equipment, such as surgical scalpels, can be sanitized using a detergent or treating composition containing a surfactant and a solvent such as water is disclosed. The method involves taking the used medical equipment and contacting it with the treating composition, and subjecting both the equipment and composition to microwaves. The composition foams during microwaving and/or immerses the equipment such that microwave arcing is avoided, and such that the medical equipment is sanitized.

Claims

1. A method for sanitizing medical equipment containing microbes, said method comprising the steps of:

(a) contacting said medical equipment with an effective amount of a treating composition containing a surfactant and a solvent which generates heat under microwave radiation and a bleaching agent; and

(b) subjecting said medical equipment and said treating composition to microwaves for an effective amount of time such that a sanitizing amount of said microbes are removed from said medical equipment, wherein the combination of the amount of the treating composition and the time of microwaving sterilizes said medical equipment.

2. A method according to claim 1 wherein said treating composition is aqueous.

3. A method according to claim 1 wherein said bleaching agent is selected from the group consisting of:

a) diacyl peroxide;

b) a source of hydrogen peroxide and bleach activator;

c) a source of hydrogen peroxide;

c) a chlorine bleach; and

d) mixtures thereof.

4. A method according to claim 1 wherein said bleaching agent is a diacyl peroxide selected from the group consisting dibenzoyl peroxide, dianisoyl peroxide, benzoyl gluaryl peroxide, benzoyl succinyl peroxide, di-(2-methybenzoyl) peroxide, diphthaloyl peroxide, dinaphthoyl peroxide, substituted dinaphthoyl peroxide, and mixtures thereof.

5. A method according to claim 1 wherein said treating composition further comprises an ingredient selected from the group consisting of clay, polycarboxylate thickeners, baking soda, carbonates, phosphates, hydrobenzoic acid, dicarboxylic acid, siloxanes, perfumes, bleach catalysts, and mixtures thereof.

6. A method according to claim 1 wherein said solvent in said treating composition is water.

7. A method according to claim 1 wherein said effective amount of time is from about 30 seconds to about 5 minutes.

8. A method according to claim 1 wherein said effective amount of time is from about 30 seconds to about 3 minutes.

9. A method according to claim 1 wherein said sanitizing amount comprises removing at least about 50% of the microbes originally on said equipment.

10. A method according to claim 1 wherein said sanitizing amount comprises removing at least about 90% of the microbes originally on said equipment.

11. A method according to claim 1 wherein said sanitizing amount comprises removing at least about 99.9% of the microbes originally on said equipment.

12. A method according to claim 1 wherein said microwaves have an electromagnetic radiation wavelength of from about 1 cm to about 1 m.

13. A method according to claim 1 wherein said treating composition is a gel or liquid detergent composition comprising by weight:

(a) from about 0.1% to about 60% of said bleaching agent which is selected from the group consisting of;

i) diacyl peroxide having the general formula;

14. A method according to claim 1 wherein said treating composition is a gel detergent composition comprising by weight:

(a) from about 0.1% to about 10% of a diacyl peroxide having the general formula;

15. A method according to claim 1 wherein the treating composition is a liquid, and the step (a) comprises placing said medical equipment in a container containing said treating composition so that said medical equipment is at least partially immersed in said treating composition;

and, said container with said medical equipment therein is placed into a microwave oven during step (b).

16. A method according to claim 15 wherein said surfactant creates a foam during step (b).

17. A method according to claim 16 wherein said medical equipment is substantially immersed in at least one of said liquid treating composition and said foam during step (b).

18. A medical equipment sanitizing product comprising:

a treating composition containing a surfactant and a solvent which generates heat under microwave radiation, and a bleaching agent; and

instructions for using said treating composition, wherein said instructions describe the method of claim 1.