Array Microfluidic Chip for Rapid Antibiotic Susceptibility Testing
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Solution Overview
Problem
Current antibiotic susceptibility testing methods are complex, time-consuming, and prone to errors due to manual operation, resulting in lower accuracy and efficiency.
Innovation Solution
An array microfluidic chip with reaction wells arranged in an array form, equipped with a transparent hydrophilic membrane and a covering sheet, which allows for quantitative transport of bacterial solutions to reaction wells, enabling rapid and accurate antibiotic susceptibility testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional antibiotic susceptibility testing methods are used, then testing can be performed, but the process is complicated and time-consuming
Solution Approach 1:
The chip divides the testing system into multiple independent reaction wells arranged in an array, each capable of performing susceptibility testing independently. This segmentation allows parallel processing of multiple samples or multiple antibiotic concentrations simultaneously, significantly improving productivity while maintaining simple individual well structures
Solution Approach 2:
The patent implements a hierarchical well structure where reaction wells are nested within a larger chip platform that includes sample loading wells, reagent reservoirs, and control wells. This nested arrangement integrates multiple testing functions into a single compact system, reducing overall preparation complexity while enabling high-throughput testing
2Reliability
If manual operation is used in antibiotic susceptibility testing, then testing can be performed, but errors are generated due to operation differences
Solution Approach 1:
The chip is designed with self-aligning features, automatic fluid distribution channels, and built-in control mechanisms that eliminate manual alignment and dosing operations. The system automatically distributes bacterial suspensions and antibiotics to reaction wells according to pre-programmed flow paths, ensuring consistent results across different operators while maintaining high reliability
Solution Approach 2:
The patent standardizes testing parameters by providing fixed concentrations of antibiotics in separate reservoirs and pre-calibrated flow rates through microfluidic channels. By changing from manual parameter adjustment to automated parameter control, the system eliminates operation-induced variations and ensures reproducible testing accuracy across different laboratories
3Loss of time
If conventional testing protocols are used, then testing can be performed, but the process is time-consuming
Solution Approach 1:
The chip pre-loads reagents, antibiotics, and control solutions into dedicated reservoirs before testing begins. Bacterial suspensions are pre-prepared and stored in separate wells. This preliminary preparation eliminates time-consuming steps during actual testing, allowing rapid initiation of experiments and significantly reducing total testing time while maintaining high throughput capability
Solution Approach 2:
The microfluidic chip enables continuous fluid flow through sealed channels, allowing simultaneous ongoing reactions in multiple reaction wells without interruption. The sealed microfluidic environment maintains continuous mixing and reaction progression, eliminating the need for repeated manual interventions and extending useful action time across all wells concurrently, thereby reducing overall testing time
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 microfluidic chip system simplifies the testing process, reduces manual errors, and enhances testing accuracy, allowing for rapid and reliable antibiotic susceptibility testing.
Implementation Method 1
a bacteria-containing medium is added to the sample loading well from the first opening, and then the bacteria-containing medium is transported to each of the reaction wells from the sample loading well quantitatively
Implementation Method 2
The adhesive element is disposed on one surface of the covering sheet and is located between the covering sheet and the transparent hydrophilic membrane
Data Source
AI summary
An array microfluidic chip includes a chip mainbody, a transparent hydrophilic membrane, and a covering sheet. The chip mainbody includes a sample loading well and a plurality of reaction wells. The reaction wells are respectively connected to the sample loading well and arranged in an array form. The transparent hydrophilic membrane is disposed on the chip mainbody and covers the reaction wells. The transparent hydrophilic membrane includes a plurality of air pores and a first opening. The air pores are respectively connected to one of the reaction wells. The covering sheet covers the air pores and includes an adhesive element and a vent hole. The covering sheet, the adhesive element and the transparent hydrophilic membrane are stacked to form a vent space.