Spore Removal Composition Using Polymeric Cationic Antimicrobials
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Solution Overview
Problem
Current methods are inadequate for effectively removing Clostridium difficile spores from skin, which are a significant source of infection transmission in medical settings, as they are difficult to kill and can persist on skin surfaces, leading to contamination of patients, healthcare workers, and the environment.
Innovation Solution
A method involving a composition with water and 0.04 wt % to 4 wt % polymeric cationic or nonionic antimicrobials, applied to the skin and subjected to mechanical action for at least one second, followed by removal, effectively removes spores from the skin surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cleaning methods are used on skin, then they are easy to perform, but they fail to effectively remove C. difficile spores
Solution Approach 1:
The patent changes the chemical parameters of the cleaning composition by incorporating specific concentrations of polymeric cationic antimicrobials (0.04-4 wt%) and nonionic surfactants (0.1-10 wt%). This chemical modification enables the composition to effectively remove spores while maintaining ease of mechanical application, resolving the contradiction between removal effectiveness and operational simplicity.
Solution Approach 2:
The patent creates a composite cleaning composition that combines polymeric cationic antimicrobials, nonionic surfactants, and water in specific ratios. This composite formulation synergistically enhances spore removal capability while preserving the ease of mechanical action required for practical application, thereby resolving the technical contradiction.
2Reliability
If strong antimicrobial agents are used to kill spores, then spore removal effectiveness improves, but safety for repeated use deteriorates
Solution Approach 1:
The patent optimizes the concentration parameters of antimicrobial agents to a specific range (0.04-4 wt% polymeric cationic antimicrobial) that is sufficient for spore removal while remaining safe for repeated skin contact. This parameter optimization resolves the contradiction between killing effectiveness and skin safety.
Solution Approach 2:
The patent introduces nonionic surfactants as intermediary substances that enhance the effectiveness of mild antimicrobial agents. The surfactants facilitate spore removal by reducing surface tension and improving wetting, allowing weaker but safer antimicrobial concentrations to achieve the same effect as stronger agents, thus resolving the safety-effectiveness contradiction.
3Reliability
If polymeric cationic antimicrobials are used at high concentrations, then spore removal effectiveness improves, but the composition becomes less safe for skin contact
Solution Approach 1:
The patent establishes an optimal concentration parameter for polymeric cationic antimicrobials (0.04-4 wt%) that balances spore removal effectiveness with skin safety. This parameter optimization ensures sufficient antimicrobial activity while preventing excessive skin irritation, resolving the contradiction between removal capability and skin compatibility.
Solution Approach 2:
The patent uses nonionic surfactants as mediators that enhance the spore removal efficiency of low-concentration polymeric cationic antimicrobials. The surfactants reduce the required antimicrobial concentration by improving contact and penetration, thereby maintaining effectiveness while reducing skin irritation risks.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly reduces spore levels on the skin, comparable to CDC-recommended protocols, while being safe for repeated use and effective in killing vegetative bacteria, thus reducing the risk of transmission.
Implementation Method 1
the composition includes water and from 0.04 wt % to 4 wt % polymeric cationic antimicrobial, nonionic antimicrobial or combinations thereof; effective in killing vegetative bacteria
Implementation Method 2
Methods for spore removal comprising a polysorbate surfactant and cationic antimicrobial mixture
Data Source
AI summary
Disclosed herein are methods for removing spores from skin, the method including dispensing an effective amount of a composition into or onto an article, wherein the composition includes water and from about 0.04 wt % to about 4 wt % polymeric cationic antimicrobial, nonionic antimicrobial or combinations thereof; contacting a skin surface with the composition; mechanically acting on the skin surface for at least one (1) second while the skin surface is in the presence of the composition; and removing at least a portion of the composition from the surface of the skin, wherein removing the composition also removes spores from the skin surface.