RFID-Enabled Thermal Cycler for Automated PCR Assay Control
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Solution Overview
Problem
Thermal cyclers used in PCR applications face challenges due to the need for sequence- or test-specific cycling steps and detection methods, leading to increased complexity and potential for user error, as well as limited flexibility in accommodating different tests.
Innovation Solution
The use of RFID tags on reaction vessels to program thermal cyclers, allowing for automated process flow and single-button operation, integrating critical information and result archiving, and enabling flexibility in running various assays without firmware updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a thermal cycler is made freely programmable to accommodate different tests, then adaptability is improved, but device complexity and user error potential increase
Solution Approach 1:
The patent segments the programming function by separating test-specific parameters from the cycler core. Each test is encapsulated in its own programmable card that contains all sequence-specific cycling steps and detection methods. This allows the cycler to remain simple while achieving high adaptability through card replacement rather than system reconfiguration.
Solution Approach 2:
The programmable card acts as an intermediary between the user and the cycler. Instead of the user directly programming complex thermal profiles, they simply load the pre-programmed card which mediates the translation of high-level test objectives into detailed thermal cycling parameters, reducing user error while maintaining adaptability.
2Ease of operation
If a thermal cycler uses restricted operations to reduce complexity, then ease of operation is improved, but adaptability to different tests is limited
Solution Approach 1:
The cycler is designed with a universal interface that can accommodate multiple test types through a single standardized card format. The core cycler hardware remains simple and unchanged, while the programmable cards provide multi-functionality by encoding different test protocols. This allows one simple device to perform many functions through card replacement.
Solution Approach 2:
All complex programming decisions and thermal profile configurations are made in advance during card manufacturing. The user simply loads the pre-configured card without needing to understand or program the underlying complexity. This preliminary action maintains ease of operation while enabling adaptability to various tests.
3Measurement precision
If thermal cycling parameters are test-specific, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Instead of storing multiple complete cycler configurations in the device memory, the patent uses external programmable cards as copies of test-specific parameters. Each card is a self-contained copy of the required thermal profile and detection parameters for a specific test. This allows precise test-specific parameters to be maintained while keeping the cycler core simple and reusable.
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 simplifies operation, reduces user interaction and error, and allows for flexible diagnostic testing by automating process flow and integrating auditing trails, while ensuring accurate and flexible operation of thermal cyclers across different assays.
Implementation Method 1
The present invention uses Radio Frequency Identification (RFID) to simplify operation and to reduce user interaction requirements
Data Source
AI summary
The present invention provides a method of operating a thermal cycler using readable tags (for example, Radio Frequency Identification (RFID)) to simplify the operation and to reduce user interaction requirements. The RFID tag is used to program the thermal cycler unit. This automates process flow and allows single button operation. In general terms, the invention uses RFID tags provided on reaction vessels to identify a particular vessel; while a readable program card contains data associating reaction vessel identities with specific operations (eg, thermal cycling program, detection steps) to be performed on that vessel. The thermal cycler detects the reaction vessel RFID tag, and selects an appropriate operation to perform.