E-Gated Electrochemical Test Strip for Timed Sample Flow
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Solution Overview
Problem
Point of care (POC) testing systems face challenges in convenience, disposability, and ease of use, as existing systems require complex setups and lengthy result processing times, making them less desirable for immediate analyte testing.
Innovation Solution
The development of an e-gated test strip with a first flow path and a time-dependent area, featuring an e-gate that separates the reaction or heating area from the detection area, allowing for controlled sample processing and detection using hydrophobic glass bead dielectrics or Self-Assembled Monolayers (SAMs), which can be electrically activated to manage fluid flow and temperature, enabling efficient analyte testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional POC testing systems are used, then analyte detection can be performed, but the systems require complex setups and lengthy result processing times
Solution Approach 1:
The test strip is divided into distinct functional zones: a reaction zone for sample preparation and a detection zone for analyte measurement. This segmentation allows each zone to be optimized independently, simplifying the overall system while maintaining functionality. The physical separation enables the reaction zone to handle complex sample processing while the detection zone remains simple and straightforward.
Solution Approach 2:
Sample preparation steps including heating, mixing, and chemical reactions are performed in advance in the reaction zone before the sample reaches the detection zone. This preliminary action ensures that when the sample arrives at the detection area, all necessary processing is complete, eliminating the need for complex real-time operations and reducing result processing time.
2Productivity
If traditional test strips are used, then analyte detection is possible, but result processing time is lengthy
Solution Approach 1:
All sample preparation operations (heating, mixing, chemical reactions) are completed in the reaction zone before detection begins. This ensures that the detection phase can start immediately with fully prepared samples, significantly reducing the time from sample application to result delivery.
Solution Approach 2:
The test strip uses capillary action and electrochemical reactions to automatically transport and process samples, replacing manual mechanical operations. This automated process eliminates delays associated with manual handling and accelerates the overall testing workflow.
3Measurement precision
If complex POC testing systems are used, then detection accuracy can be achieved, but manufacturing and shipping costs increase
Solution Approach 1:
Dividing the test strip into separate reaction and detection zones allows for simplified manufacturing of each component. The reaction zone can be manufactured with basic materials and structures, while the detection zone uses standardized electrochemical components, reducing overall manufacturing complexity and cost.
Solution Approach 2:
The test strip is designed as a disposable single-use device, eliminating the need for expensive, complex, and reusable components. This approach reduces manufacturing costs, simplifies shipping (no sterilization or maintenance requirements), and maintains high accuracy through precise control of reaction conditions in each zone.
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 solution enhances consumer reliability, reduces manufacturing and shipping costs, and improves accuracy by allowing for precise control of fluid flow and temperature, facilitating quicker and more reliable analyte detection, such as HbA1C, with fewer components and reduced physical component tolerance issues.
Implementation Method 1
the e-gate is a hydrophobic glass bead dielectric
Implementation Method 2
a heating element in communication with the heating area of the first flow path, for heating a sample in the first flow path
Implementation Method 3
the e-gate a Self Assembled Monolayer (SAM)
Implementation Method 4
the e-gate is a hydrophobic glass bead dielectric
Data Source
AI summary
A system for testing for an analyte includes a test strip. The test strip includes a first flow path. The test strip further includes a heating element in communication with a heating area of the first flow path, for heating a sample in the first flow path. The test strip further includes an e-gate, the e-gate in the first flow path, the e-gate separating the heating area from a detection area of the first flow path.