Integrated Microfluidic Cartridge for On-Demand Polynucleotide Testing
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Solution Overview
Problem
Current diagnostic processes for biological samples are cumbersome and inefficient, requiring multiple steps, specialized equipment, and trained personnel, leading to delays and increased costs due to the need for batch processing and sample transportation.
Innovation Solution
An integrated apparatus comprising a microfluidic cartridge and a bench-top system that automates sample preparation, PCR, and detection, using a heat source and detector to process polynucleotide-containing samples, allowing for on-demand analysis and reducing the need for separate steps and specialized equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple separate steps and specialized equipment are used for diagnostic analysis, then detection precision is improved, but device complexity and loss of time increase
Solution Approach 1:
The patent combines multiple separate diagnostic steps (sample preparation, PCR amplification, and detection) into a single integrated microfluidic cartridge system. The cartridge contains all necessary reagents, thermal cycling capabilities, and detection mechanisms in one device, eliminating the need for multiple separate equipment pieces and manual transfer steps between them.
Solution Approach 2:
The microfluidic cartridge is designed as a universal platform that performs multiple functions: it serves as the reaction vessel for PCR, the thermal cycler for temperature programming, the incubator for reagent activation, and the detection chamber for analyzing amplification products. This multi-functional design replaces several specialized equipment pieces with a single integrated device.
2Measurement precision
If multiple separate steps and batch processing are used, then detection precision is improved, but loss of time and productivity decrease
Solution Approach 1:
The integrated microfluidic cartridge enables continuous processing by eliminating idle time between steps. Sample preparation, reagent mixing, thermal cycling, and detection occur in continuous sequence within the same device without requiring sample transfer or equipment reconfiguration. The system can process multiple samples in parallel through replicate cartridges, maintaining continuous productive action.
Solution Approach 2:
All reagents are pre-loaded and pre-positioned within the microfluidic cartridge before the diagnostic test begins. The cartridge contains pre-measured amounts of primers, probes, enzymes, and buffers in their correct positions, eliminating the need for time-consuming setup and reagent addition steps during the actual diagnostic process.
3Measurement precision
If specialized equipment and trained personnel are required, then detection precision is improved, but ease of operation and accessibility worsen
Solution Approach 1:
The microfluidic cartridge is designed to be self-contained and self-regulating. It includes built-in thermal elements for temperature control, integrated mixing mechanisms for reagent homogenization, and automated fluid transport systems. The cartridge requires minimal user intervention beyond sample insertion and result reading, making it operable by personnel without specialized training while maintaining high detection precision.
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
Facilitates rapid, on-demand diagnostic testing by automating key steps in the analysis of biological samples, reducing the need for batch processing and specialized equipment, thereby decreasing delays and costs while improving efficiency and accessibility.
Implementation Method 1
at least one heat source thermally coupled to the cartridge and configured to apply heat to one or more selected regions of the cartridge at one or more selected times
Implementation Method 2
a detector configured to detect presence of the one or more amplified polynucleotides
Data Source
AI summary
This patent application describes an integrated apparatus for processing polynucleotide-containing samples, and for providing a diagnostic result thereon. The apparatus is configured to receive a microfluidic cartridge that contains reagents and a network for processing a sample. Also described are methods of using the apparatus.