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Area decontamination via low-level concentration of germicidal agent

A bactericide, regional technology, applied in the fields of chemistry, atomized substances, water supply devices, etc., can solve the problems of insufficient, expensive, low efficiency, etc.

Inactive Publication Date: 2009-12-16
ETHICON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Inadequate or incomplete decontamination and disinfection allow the possible transfer of infectious microorganisms from environmental surfaces to patients or staff, but facility shutdowns to comprehensively address contamination are costly and ineffective

Method used

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  • Area decontamination via low-level concentration of germicidal agent
  • Area decontamination via low-level concentration of germicidal agent
  • Area decontamination via low-level concentration of germicidal agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The following experiment was performed to demonstrate the reduction of spores of G. stearothermophilus surviving on stainless steel surfaces using hydrogen peroxide vapor released from the urea complex at a minimal level of 0.6 ppm. Inoculate 10 μL of 6 × 10 4 Inoculum of spores. The inoculum then dries on the blade surface. Nine inoculated blades placed at 1ft 3 In a sealed chamber made of acrylic. In the chamber the urea complex was placed in a glass tube with fluid confinement enabling the peroxide concentration in the chamber to be controlled. Three similarly inoculated blades were placed in a covered petri dish and placed close to the chamber as a control. At three-day intervals, three inserts were removed from the sealed chamber along with a control. The inserts were subjected to standard restoration, plating and inoculation procedures from which surviving spore counts and log reduction values ​​were determined. The log reduction values ​​are shown in Table ...

Embodiment 2

[0060] To demonstrate that the log reduction of spores of B. stearothermophilus hydroperoxide is dependent on the concentration of peroxide, scalpel blades prepared as described in Example 1 were exposed to a minimum of 0.35 ppm H 2 o 2 concentration. In this case, the inoculated blades were exposed continuously, which resulted in some changes in the mean peroxide concentration during the exposure. The log reduction values ​​after 3, 6, and 9 days of exposure and the average, high and low concentrations of peroxide during exposure are shown in Table 2.

[0061] Table 2

[0062] log-reduced mean

[0063] Concentrations shown above are averages over the entire exposure period. As shown, there was some variation at the very small concentration of 0.35 ppm, however, the data in the table indicate that higher concentrations resulted in higher microbial kill rates.

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Abstract

Provided is a method of decontaminating an area via low-level concentration of germicidal agent, and related device. The method comprises releasing a germicidal agent into the area from a germicidal source, controlling the germicidal agent concentration in the area to a predetermined concentration that does not exceed a Permissible Exposure Limit, and contacting microorganisms in the area with the germicidal agent to decontaminate the area. The device comprises a releasing mechanism configured to release a germicidal agent from a germicidal source at a predetermined concentration into the area such that the predetermined concentration of germicidal agent in the area does not exceed a Permissible Exposure Limit.

Description

technical field [0001] The present application relates to the decontamination of areas by low level concentrations of biocides, and devices for providing said effect. Background technique [0002] Microorganisms are well known to contaminate environmental surfaces in areas such as hospital wards. Thus, operators of facilities dealing with health and hygiene have strict regulations to reduce or eliminate environmental contamination to prevent the transfer of microorganisms from these surfaces to customers, patients or staff. The primary route through which microorganisms are transferred from environmental surfaces to patients or staff is through the hands of patients or staff. Thus, standard environmental decontamination focuses most on high-touch surfaces, such as bed rails, and less on low-touch surfaces, such as floors and ceilings. [0003] Standard methods for dealing with area contamination include measures such as sweeping, vacuuming, mopping and mopping low-touch ar...

Claims

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Application Information

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IPC IPC(8): A61L2/20A61L2/22A61L2/24A61L101/10A61L101/22F24F3/16F24F8/24F24F8/26
CPCF24F2003/1667A61L9/015F24F2003/1675A61L2202/25A61L2/24A61L9/14F24F3/16A61L2/202A61L2/208A61L2/22F24F8/24F24F8/22F24F8/26
Inventor R·C·小普拉特林斯民R·G·卢卡斯克
Owner ETHICON INC
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