Lens-Free Drug Screening Device with Microelectrode Array
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Solution Overview
Problem
Current drug screening methods for cardiac toxicity are limited in accuracy and efficiency, as they primarily focus on optical signals and fail to record electrophysiological signals simultaneously, which are crucial for comprehensive drug safety assessment during the development process.
Innovation Solution
A lens-free device and method for drug screening that combines optical and electrophysiological signal detection using a substrate with a microelectrode array, allowing simultaneous recording of both signals, and a processing unit to correlate them, enabling a more comprehensive evaluation of drug effects on cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only optical signal detection is used for drug screening, then the device structure remains simple, but the screening accuracy and comprehensiveness deteriorate due to inability to detect electrophysiological signals
Solution Approach 1:
The patent combines optical signal detection and electrophysiological signal detection into a single integrated device. The substrate integrates both optical detection capabilities (for detecting light wave interactions with cells) and electrical detection capabilities (via microelectrode arrays for detecting electrophysiological signals), allowing simultaneous multimodal measurement without requiring separate devices, thereby improving screening accuracy while controlling complexity
Solution Approach 2:
The device is designed with multi-functionality to perform both optical imaging/detection and electrophysiological signal recording through the integrated substrate. This universal design allows a single device to execute multiple detection functions that would traditionally require separate specialized instruments, enhancing measurement comprehensiveness while avoiding the complexity of coordinating multiple independent systems
2Adaptability or versatility
If simultaneous optical and electrophysiological signal detection is implemented, then the comprehensiveness of drug safety assessment is improved, but the device complexity increases
Solution Approach 1:
The patent merges optical detection and electrophysiological detection functions into a single integrated substrate structure. The substrate simultaneously supports optical wave interaction for imaging and microelectrode arrays for electrical signal detection, enabling comprehensive signal acquisition from the same cell population without requiring multiple separate device systems
Solution Approach 2:
The integrated substrate acts as an intermediary platform that mediates between the cells being tested and the detection systems. It provides a unified interface that captures both optical and electrical signals from cells, simplifying the overall system architecture by consolidating multiple detection pathways into a single mediating structure rather than requiring direct connections to multiple independent devices
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 approach enhances the accuracy of drug screening by providing a multimodal analysis of cells, allowing for the simultaneous detection of optical and electrophysiological signals, which improves the assessment of drug toxicity and reduces the time required for drug development by providing a more comprehensive understanding of cellular responses.
Implementation Method 1
a light source positioned to illuminate the cells, when present, on the substrate surface with a light wave; a sensor positioned to detect an optical signal caused by illuminating the cells
Implementation Method 2
the substrate surface comprises a microelectrode array for sensing an electrophysiological signal from the cells
Implementation Method 3
the substrate surface is a reflective surface for reflecting the light wave, and the sensor is positioned to detect the reflected light wave
Data Source
AI summary
The present disclosure relates to devices and methods configured to perform drug screening on cells. At least one embodiment relates to a lens-free device for performing drug screening on cells. The lens-free device includes a substrate having a surface. The lens-free device also includes a light source positioned to illuminate the cells, when present, on the substrate surface with a light wave. The lens-free device further includes a sensor positioned to detect an optical signal caused by illuminating the cells. The substrate surface includes a microelectrode array for sensing an electrophysiological signal from the cells.