Rigid Electrode Assembly for Platelet Impedance Measurement
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Solution Overview
Problem
Conventional electrode assemblies for measuring platelet function in blood have limitations such as inconsistent reproducibility, mediocre signal-to-noise ratio, and difficulty in manufacturing due to flexible, non-rigid substrates and minimally anchored wires.
Innovation Solution
A platelet impedance measurement system with a rigid electrode assembly that includes a substrate with slots or tabs for secure placement within a container, exposed wires guided by grooves, and a brace to maintain precise positioning, using palladium-, silver-, or gold-coated wires for improved signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flexible, non-rigid substrates are used in conventional electrode assemblies, then ease of manufacture is improved, but measurement precision and reproducibility deteriorate due to inconsistent wire placement
Solution Approach 1:
The substrate material is changed from flexible to rigid, fundamentally altering the mechanical properties to enable precise wire placement while maintaining manufacturability through the rigid structure's stability and consistency
Solution Approach 2:
Wires are pre-positioned and anchored within grooves on the rigid substrate before final assembly, ensuring consistent placement and reducing variability in measurements across different assemblies
2Device complexity
If minimally anchored wires are used in conventional electrode assemblies, then device complexity is reduced, but measurement precision deteriorates due to inconsistent wire positioning
Solution Approach 1:
Grooves are introduced as intermediary structures on the substrate to guide and position wires, providing a simple yet effective mechanism for consistent wire placement without adding significant complexity to the overall device
Solution Approach 2:
Wires are pre-positioned and anchored within grooves on the rigid substrate before final assembly, ensuring consistent placement and reducing variability in measurements across different assemblies
3Adaptability or versatility
If conventional electrode assemblies are used, then adaptability to existing cuvettes is maintained, but signal-to-noise ratio deteriorates to mediocre levels
Solution Approach 1:
The rigid substrate structure changes the mechanical and electrical parameters of the electrode assembly, improving signal stability and reducing noise while maintaining compatibility with standard cuvette geometries through appropriate dimensional 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
The system provides reproducible and precise impedance measurements with enhanced signal-to-noise ratio, simplifying manufacturing and improving the accuracy of platelet function assessment.
Implementation Method 1
Impedance measurements between two wires of the electrode are taken for various mixtures of the platelets and aggregating reagents
Data Source
AI summary
A platelet impedance measurement system including an electrode assembly allows for measurement of platelet function in blood. The assembly includes a substrate that acts as a substantially rigid base and includes an electrode. A portion of the electrode is exposed such that, when the electrode is placed in blood, the exposed portion is in contact with the blood for measuring impedance changes as platelets adhere to the electrode. Wires of the electrode can be attached to each end of the substrate and can run within a groove along a portion of the substrate. The substrate includes an open area where the wires in the groove exit and re-enter the substrate at the end of the substrate, allowing the wires to be exposed to the blood. The open area includes a brace, ensuring that the exposed wires are held in the appropriate placement relative to each other and to the cuvette.