Respiratory Sample Liquefaction via Catalase-Mediated Hydrogen Peroxide Decomposition
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Solution Overview
Problem
Current methods for detecting pathogenic microorganisms in respiratory samples, such as sputum, are hindered by the samples' high viscosity and the presence of bacterial biofilms, which require lengthy processing times and specialized equipment, making rapid detection at the point of care challenging, especially for multidrug-resistant pathogens like Pseudomonas aeruginosa.
Innovation Solution
Adding an aqueous solution of hydrogen peroxide to the respiratory sample causes it to liquefy and homogenize within minutes due to catalase-mediated decomposition, dispersing biofilms and enabling rapid detection without the need for additional instruments or reagents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bacteriological culture is used for pathogen detection, then detection accuracy is improved, but detection time increases significantly
Solution Approach 1:
The patent applies preliminary action by performing sputum liquefaction before detection. The method uses catalase enzyme treatment to pre-process the sample, breaking down mucins and making the sample liquid within minutes. This preliminary liquefaction step enables subsequent rapid detection methods to be applied immediately, eliminating the lengthy waiting period required for traditional culture methods while maintaining detection accuracy.
2Measurement precision
If traditional sputum processing methods are used, then pathogen detection is possible, but the procedures are complex and require specialized equipment
Solution Approach 1:
The patent applies self-service by using the catalase enzyme naturally present in the sputum sample itself to perform the liquefaction. The catalase breaks down hydrogen peroxide added to the sample, generating oxygen bubbles that physically disrupt the viscous matrix. This self-catalyzed reaction eliminates the need for external mechanical mixing devices, vortex mixers, or complex processing equipment, making the method suitable for point-of-care settings.
3Stability of the object's composition
If thiolated compounds like N-acetyl-cysteine are used for sputum liquefaction, then sample viscosity is reduced, but additional instruments and reagents are required
Solution Approach 1:
The patent applies the taking out principle by removing the need for complex equipment and multiple reagents. Instead of using thiolated compounds that require vortex mixers and thermostatic baths, the method extracts only the essential element: hydrogen peroxide solution. The catalase-enzyme reaction system naturally present in the sample replaces the need for mechanical mixing equipment, simplifying the entire processing protocol to just adding reagent and waiting for the chemical reaction.
4Measurement precision
If organic solvents like chloroform are used for sample processing, then pathogen detection is enabled, but safety hazards increase
Solution Approach 1:
The patent applies parameter changes by transitioning from organic solvent-based processing to an aqueous-based enzymatic system. Instead of using flammable organic solvents like chloroform or dichloromethane that require fume hoods and special safety precautions, the method uses hydrogen peroxide in aqueous solution with catalase enzyme. This parameter change in the chemical system eliminates fire hazards and allows the procedure to be safely performed in routine clinical settings without specialized ventilation equipment.
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
This method allows for ultrafast, simple, and cost-effective liquefaction and homogenization of respiratory samples, facilitating quick and accurate detection of pathogenic microorganisms using biosensors, particularly suitable for point-of-care applications.
Implementation Method 1
Adding an aqueous solution of hydrogen peroxide to the respiratory sample causes it to liquefy and homogenize within minutes due to catalase-mediated decomposition
Data Source
AI summary
The present invention relates to a method for liquefying respiratory samples, such as sputum samples. Samples of this type are characterized in that they can be highly viscous or semisolid, which means that to detect pathogenic microorganisms in them, they require prior treatment in order to make them more liquid and homogeneous. The liquefaction method proposed in the present innovation enables pathogenic microorganisms that cause respiratory infections to be subsequently detected.