Serial Suspended Microchannel Resonator Array for High-Throughput Cell Analysis
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Solution Overview
Problem
Existing suspended microchannel resonators have limited throughput, making them impractical for screening large cell samples, as they can only measure a few cells per hour, which is insufficient for analyzing up to 10^5 cells.
Innovation Solution
A serial array of suspended microchannel resonators with multiple cantilevers in fluid communication, each with a delay channel, allowing cells to flow through and be measured sequentially, driven by a piezoelectric shaker with adjusted resonant frequencies and operating in the second vibrational mode to prevent coupling and cell trapping, and utilizing phase-locked loops for simultaneous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single suspended microchannel resonator is used, then measurement precision is maintained, but productivity is limited to a few cells per hour
Solution Approach 1:
The system divides the measurement task across multiple resonator cantilevers (e.g., 10 cantilevers) that operate simultaneously in series. Each cantilever measures cells sequentially as they flow through the device, enabling throughput of up to 10,000 cells per hour while maintaining the measurement precision of individual resonators.
Solution Approach 2:
The patent introduces a temporal dimension to the measurement process by using delay channels between cantilevers. This allows cells to be measured by multiple cantilevers at different time points, effectively transforming a single-point measurement system into a multi-point temporal measurement system that increases throughput without sacrificing precision.
2Productivity
If multiple resonators are used in parallel, then productivity increases, but coupling between resonators occurs
Solution Approach 1:
Instead of connecting resonators in parallel where they share common fluidic pathways, the patent inverts the approach by connecting them in series with delay channels between each cantilever. This inversion eliminates coupling effects while maintaining high throughput, as each cantilever operates independently on cells that have already passed through previous cantilevers.
Solution Approach 2:
Delay channels serve as intermediaries between resonator cantilevers, providing physical and functional separation. These channels allow cells to travel between measurement points without direct interaction between cantilevers, preventing coupling while enabling sequential measurement by multiple resonators simultaneously.
3Measurement precision
If cells are trapped on the cantilever, then measurement precision is affected, but operating in higher vibrational modes increases complexity
Solution Approach 1:
The patent changes the vibrational mode parameter from the fundamental mode to the second or higher vibrational mode. This parameter change prevents cell trapping on the cantilever surface while maintaining measurement precision for mass detection, as cells pass through the nodal regions rather than being trapped at antinodal regions.
Solution Approach 2:
The system dynamically operates cantilevers in higher vibrational modes with specific frequency characteristics that create nodal regions where cells can pass without being trapped. This dynamic operational mode eliminates the cell trapping problem while maintaining precise mass measurement capabilities.
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 achieves a throughput of up to 10,000 cells per hour by allowing multiple cells to be measured simultaneously and preventing cell trapping, while maintaining high-resolution mass measurements.
Implementation Method 1
The resonator sensors are driven by a piezoelectric shaker
Implementation Method 2
each of the cantilevers has a different length to provide different resonant frequencies to prevent coupling between resonators
Data Source
AI summary
Serial suspended microchannel resonator sensor array. The array includes a plurality of resonator cantilevers in fluid communication with one another and a plurality of delay channels in fluid communication with, and disposed between, the resonator cantilevers. An object introduced into the array will flow in one direction and be measured by each of the cantilevers in turn after a selected delay in the delay channels.