β-Lactamase Bacteria Detection with Filter Capture and Electrical Readout
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Solution Overview
Problem
Existing methods for detecting β-lactam antibiotic hydrolyzing bacteria are costly, labor-intensive, and prone to clinician error, requiring lengthy sample preparation times and lacking high-throughput capabilities, with a need for improved devices and methods that provide rapid and automated detection.
Innovation Solution
A method involving a filter surface to capture bacteria, followed by a buffer solution containing a β-lactamase substrate, activator, and lysing agent to form a reaction mixture, monitored by a sensor for electrical characteristic changes to detect β-lactam antibiotic hydrolyzing bacteria, and a system using a multichannel delivery device to analyze multiple samples simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If microbial culturing techniques are used to detect β-lactam antibiotic hydrolyzing bacteria, then detection accuracy is improved, but detection time and labor intensity increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-coating the sensor surface with β-lactamase substrate and activator before sample introduction. This allows the detection system to be ready in advance, eliminating the need for lengthy microbial culturing steps while maintaining detection accuracy through pre-prepared reactive surfaces.
Solution Approach 2:
The patent extracts the detection function from traditional microbial culturing systems by using a sensor that directly detects β-lactamase enzyme activity in the sample without requiring bacterial culture growth. This extraction of the essential detection function eliminates time-consuming culturing steps while preserving detection capability.
2Difficulty of detecting and measuring
If optical read-out methods are used for detection, then detection capability is achieved, but automation and throughput are limited
Solution Approach 1:
The patent replaces optical read-out methods with an electrical detection system using amperometric or potentiometric sensors. This substitution enables automated signal processing and data collection, significantly improving the extent of automation and throughput while maintaining detection capability for β-lactamase activity.
Solution Approach 2:
The patent creates a multi-functional detection system where a single sensor platform can detect various β-lactamase enzymes through electrical signals. This universal approach allows automated analysis of multiple samples with different bacterial targets, enhancing both automation capability and throughput compared to specialized optical methods.
3Reliability
If continuous monitoring by skilled personnel is implemented, then detection reliability is maintained, but operational complexity and cost increase
Solution Approach 1:
The patent implements self-service by designing a sensor system that automatically detects and records β-lactamase activity without requiring continuous manual monitoring. The electrical signals generated by the enzymatic reaction are automatically processed and interpreted, maintaining detection reliability while eliminating the need for skilled personnel to continuously observe and interpret results.
Solution Approach 2:
The patent incorporates feedback mechanisms where the electrical signals from the sensor are automatically processed and used to determine the presence of β-lactamase activity. This automated feedback loop maintains detection reliability by objectively interpreting results without human intervention, reducing operational complexity while preserving accuracy.
4Productivity
If high-throughput detection is implemented, then productivity increases, but device complexity and cost increase
Solution Approach 1:
The patent applies segmentation by using multiple independent sensor elements or sensor arrays that can simultaneously detect multiple samples. This segmentation approach increases detection throughput by processing several samples in parallel while keeping each individual sensor element relatively simple, thus managing device complexity through modular design.
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
Enables rapid, automated, and high-throughput detection of β-lactam antibiotic hydrolyzing bacteria with electronic read-outs, reducing human error and improving efficiency in healthcare settings.
Implementation Method 1
The buffer solution and the β-lactam antibiotic hydrolyzing enzymes can form a reaction mixture
Implementation Method 2
exposing a sensor having an electrical characteristic to the reaction mixture and monitoring a change in the electrical characteristic of the sensor
Data Source
AI summary
Various devices, systems and methods for detecting the presence of β-lactam antibiotic hydrolyzing bacteria in a sample are disclosed. In one embodiment, a method of detecting the presence of β-lactam antibiotic hydrolyzing bacteria includes introducing the sample to a filter configured to capture bacteria in the sample; introducing a buffer solution to the bacteria captured on the filter surface, wherein the buffer solution comprises a β-lactamase substrate, a β-lactamase activator, and a lysing agent to lyse cells of the bacteria to release β-lactam antibiotic hydrolyzing enzymes; exposing a sensor having an electrical characteristic to a reaction mixture comprising the buffer solution and the β-lactam antibiotic hydrolyzing enzymes; and monitoring a change in the electrical characteristic of the sensor to detect the presence of the β-lactam antibiotic hydrolyzing bacteria in the sample originally introduced.