Fluidic Flow Path Pressure Testing for Sequencing Leak Detection
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Solution Overview
Problem
Current sequencing systems face challenges in effectively testing and maintaining the integrity of fluidic systems, particularly in detecting leaks and ensuring pressure is maintained in flow paths, which can lead to sample loss, data loss, and equipment damage.
Innovation Solution
The system employs a method where the processor controls pumps to pressurize selected flow paths in a stepwise manner and uses a selector valve to pressure-test different flow paths, including a bypass line, to determine if each path maintains pressure within a desired range, utilizing pressure sensors to collect and analyze data for leak detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure testing is performed on fluidic systems to detect leaks, then system reliability is improved, but testing time and operational efficiency deteriorate
Solution Approach 1:
The system performs pressure testing before sequencing operations begin, establishing baseline pressure values and detecting leaks in advance. This preliminary action prevents sample loss and operational interruptions during actual sequencing runs.
Solution Approach 2:
The fluidic system includes integrated pressure sensors and control mechanisms that automatically monitor and detect pressure changes during operation. The system self-diagnoses potential leaks without requiring external intervention, maintaining continuous reliability monitoring.
2Measurement precision
If multiple flow paths are tested individually to ensure complete coverage, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The fluidic system is divided into multiple separable flow paths, each with its own pressure testing capability. The selector valve isolates and tests individual flow paths (e.g., first flow path through first channel, second flow path through second channel) independently, ensuring complete leak detection coverage without requiring a complex monolithic testing system.
Solution Approach 2:
A single pressure sensor and pump system serves multiple flow paths through the selector valve mechanism. The same testing apparatus can evaluate different flow paths by switching connections, reducing overall system complexity while maintaining comprehensive testing capability.
3Measurement precision
If stepwise pressurization is used to detect small leaks, then measurement precision is improved, but testing duration increases
Solution Approach 1:
The system applies pressure in discrete steps rather than continuously increasing it. The pump pressurizes the flow path through a series of stepped pressure levels, allowing the system to detect leaks at each pressure threshold while maintaining a controlled, efficient testing rhythm that balances sensitivity with speed.
Solution Approach 2:
Pressure sensors continuously monitor the fluidic system during pressurization and provide feedback to the control system. When a leak is detected at a specific pressure level, the system receives immediate feedback and can terminate further pressurization, reducing overall testing duration while maintaining high detection sensitivity through progressive pressure escalation.
Data Source
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AI summary
An analysis system includes a fluidic system includes a number of components that are interconnected to form a fluidic system having a plurality of flow paths. An example method of pressure testing the fluidic system includes (a) selecting a flow path from the plurality of flow paths through a flow cell in accordance with a prescribed test protocol; (b) actuating a pump to pressurize a fluid in the selected flow path; (c) generating pressure data representative of the pressure in the selected flow path; and (d) processing the pressure data to determine whether the selected flow path maintains pressure in a desired manner.