Conductive Sensor with Abrasive Particles for Skin Impedance Reduction
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Solution Overview
Problem
Existing medical sensors require a separate skin preparation step to remove the high-impedance layer on the skin, which can be time-consuming and may interfere with the adhesion of the sensor.
Innovation Solution
The sensors incorporate an electrically conductive material with abrasive particles that displace the high-impedance layer on the skin upon application, reducing the impedance between the skin and the electrode and eliminating the need for a separate skin preparation step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate skin preparation step is used to remove the high-impedance layer, then the electrical conductivity between the skin and electrode is improved, but the time required for sensor application increases and sensor adhesion may be compromised
Solution Approach 1:
The patent combines the skin preparation function and the conductive gel function into a single integrated material. The electrically conductive material includes abrasive particles suspended in a conductive gel matrix, allowing both skin preparation (abrasion) and electrical conductivity enhancement to occur simultaneously in one application step, eliminating the need for separate preparation steps
Solution Approach 2:
The electrically conductive material serves multiple functions simultaneously: it acts as a skin preparation agent through abrasive particles, provides electrical conductivity through the conductive gel, and functions as an adhesive to secure the electrode. This multi-functional material replaces multiple separate components and steps
2Reliability
If a separate skin preparation step is used to remove the high-impedance layer, then the electrical conductivity between the skin and electrode is improved, but the complexity of the application process increases
Solution Approach 1:
The patent merges multiple functions into a single material system. The electrically conductive material combines abrasive particles for skin preparation, conductive gel for electrical conductivity, and adhesive properties for electrode attachment, reducing the number of separate components and steps required in the application process
3Reliability
If abrasive particles are added to the electrically conductive material, then the impedance between skin and electrode is reduced, but the material complexity increases
Solution Approach 1:
The patent uses a composite material system where abrasive particles are suspended in an electrically conductive gel matrix. This composite structure allows the material to perform multiple functions: the abrasive particles reduce skin impedance by removing the outer layer, while the conductive gel provides electrical conductivity and acts as an adhesive, achieving impedance reduction without requiring multiple separate materials
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 improves the electrical conductivity between the skin and the sensor electrodes, enhances adhesion by removing the need for additional skin preparation materials, and simplifies the application process.
Implementation Method 1
the abrasive particles are configured to displace at least a portion of a layer on or of skin of a patient upon application of the sensor to the skin of the patient
Implementation Method 2
an electrically/ionically conductive material that is configured to improve electrical/ionic conductivity between the one or more electrodes and the patient and reduce the impedance of the electrode-to-patient connection
Data Source
AI summary
An example sensor includes an electrode assembly including an electrode well and an electrically conductive material disposed within the electrode well, the electrically conductive material comprising abrasive particles. The abrasive particles are configured to displace at least a portion of a layer on or of skin of a patient upon application of the sensor to the skin of the patient.