DESI-MS Swab Analysis for Rapid Microbial Identification
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Solution Overview
Problem
Current methods for analyzing medical swabs, particularly from mucosal membranes, are time-consuming and costly, and they fail to culture around 95% of bacteria, leading to delayed disease diagnosis and treatment.
Innovation Solution
The use of desorption electrospray ionization (DESI) mass spectrometry directly on standard medical swabs without sample preparation, allowing for rapid and multiple analyses of biological samples, including ion mobility and mass analysis, enabling direct analysis of biological materials like mucosal membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional culture-dependent methods are used for analyzing medical swabs, then microbial identification can be performed, but the process is time-consuming and cannot culture around 95% of bacteria
Solution Approach 1:
The patent replaces the mechanical culture-based identification system with a mass spectrometry-based analytical system. The DESI-MS technique ionizes microbial compounds directly from the swab surface, and the mass spectrometer analyzes the ionized compounds to identify microbes, eliminating the need for time-consuming cultural growth processes while maintaining identification accuracy.
Solution Approach 2:
The patent introduces mass spectrometry as an intermediary analytical method between sample collection and microbial identification. Instead of directly culturing microbes, the system uses mass spectrometry to analyze microbial metabolites and compounds, providing rapid identification without requiring the microbes to be cultured first.
2Reliability
If conventional culture methods are used, then microbial growth can be observed, but the workflow is costly and involves considerable delay
Solution Approach 1:
The patent replaces the slow, multi-step cultural workflow with a direct mass spectrometry analysis system. The DESI-MS technique allows for rapid analysis of microbial compounds directly from the swab, eliminating incubation times and multiple handling steps, thereby dramatically improving diagnostic productivity and speed.
Solution Approach 2:
The patent performs preliminary ionization and analysis of microbial compounds directly on the swab surface using DESI-MS, before any cultural growth is attempted. This preliminary analytical action provides immediate identification information, eliminating the need for time-consuming cultural procedures and accelerating the overall diagnostic workflow.
3Ease of operation
If standard medical swabs are used for sample collection, then the swabs are easy to handle, but current analysis methods require complex sample preparation and cultural procedures
Solution Approach 1:
The patent replaces the complex cultural analysis workflow with a direct mass spectrometry analysis system that works with standard swabs. The DESI-MS technique is compatible with swabs containing various substances (water, alcohol, blood, pus, tissue), eliminating the need for specialized sample preparation procedures and maintaining ease of swab handling while simplifying the analysis workflow.
Solution Approach 2:
The patent creates a universal analysis system using DESI-MS that can analyze multiple types of samples on standard swabs (water, alcohol, blood, pus, tissue) with a single methodology. This universal approach eliminates the need for different preparation procedures for different sample types, reducing workflow complexity while maintaining ease of operation with standard swabs.
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 approach provides rapid, efficient, and non-destructive analysis of biological samples on swabs, enabling multiple analyses and improved diagnostic capabilities for diseases and conditions such as infections, dysbiosis, and cancer, with the potential for simultaneous use with other techniques like culturing and sequencing.
Implementation Method 1
directing a spray of electrically charged droplets onto a surface of the swab in order to generate a plurality of analyte ions
Data Source
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AI summary
A method is disclosed comprising providing a biological sample on a swab 900, directing a spray of charged droplets onto a surface of the swab 900 in order to generate a plurality of analyte ions, and analysing the analyte ions.