Differential Drive-Sense Circuits for Non-Destructive Cell Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for testing cellular responses to stimuli, such as drugs and pesticides, often use dyes that adversely affect cells and limit the duration of testing, making it difficult to assess long-term cellular reactions.
Innovation Solution
A system utilizing differential drive-sense circuits (DDSCs) to detect and interpret electrical characteristics of organic and inorganic materials without damaging cells, allowing for non-invasive, real-time monitoring of cellular responses over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dyes are applied to cells for optical analysis, then cellular responses can be detected, but cells are adversely affected and die within a few hours
Solution Approach 1:
The patent replaces optical analysis methods with electrical measurement methods. Instead of using dyes that cause cellular damage for optical detection, the system uses differential drive-sense circuits to measure electrical characteristics (impedance, membrane potential) of cells, thereby eliminating the harmful effect on cell viability while maintaining detection capability
Solution Approach 2:
The patent introduces electrical signals as an intermediary between the test substance and the detection system. The differential drive-sense circuits measure changes in electrical characteristics caused by test substances, serving as a non-invasive intermediary that does not require direct contact with or penetration of cell membranes, thus avoiding cellular damage
2Measurement precision
If dyes are used to indicate cellular effects, then visual changes can be observed, but the testing duration is limited to a few hours
Solution Approach 1:
The patent substitutes optical detection with electrical detection, enabling long-term monitoring. The differential drive-sense circuits can continuously measure electrical characteristics without the cellular damage that limits dye-based methods, thereby extending the testing duration from a few hours to potentially weeks or months
Solution Approach 2:
The patent enables continuous monitoring of cellular responses over extended periods. The electrical measurement system allows repeated measurements without disturbing cell viability, maintaining continuous useful action throughout the entire testing duration rather than being limited to short-term observations
3Adaptability or versatility
If conventional optical analysis methods are used, then cellular responses to stimuli can be assessed, but the methods are destructive and limit long-term study
Solution Approach 1:
The patent replaces destructive optical analysis with non-invasive electrical measurement. The differential drive-sense circuits measure electrical characteristics such as impedance and membrane potential, providing a non-invasive approach that assesses cellular responses without causing cellular damage or death
Solution Approach 2:
The patent allows cells to serve themselves by measuring their own electrical characteristics. The differential drive-sense circuits detect changes in cell membrane properties and electrical behavior that occur in response to stimuli, enabling cells to provide their own diagnostic information without external interference or damage
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 accurate, non-destructive assessment of cellular responses to stimuli by measuring impedance, membrane potential, and other electrical characteristics, providing detailed insights into cellular behavior without harming the cells.
Implementation Method 1
measuring impedance, membrane potential, and other electrical characteristics
Data Source
AI summary
An organic and inorganic material test system includes at least one test container, a first and second set of electrodes embedded in the at least one test container, a set of transmit circuits coupled to the first set of electrodes, and a set of differential drive-sense circuits (DDSCs) coupled to the second set of electrodes. A first transmit circuit coupled to a first electrode is operable to produce a first transmit signal at a first frequency for transmission through contents of a first test container. A first DDSC coupled to a second electrode of the first test container includes a pair of drive-sense circuits (DSCs) and an output operational amplifier. The pair of DSCs are operable to generate receive signals at the first frequency. The output operational amplifier compares receive signals to produce a signal representative of the contents with respect to positioning of the first and second electrodes.