Flow Control Cartridge with Gas Release Channels for Nucleic Acid Analysis
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Solution Overview
Problem
Current molecular diagnostics require centralized laboratories and trained technicians, limiting the portability and accessibility of nucleic acid analysis, especially for point-of-care testing (POCT) where rapid and decentralized diagnostics are needed.
Innovation Solution
A flow control and processing cartridge for nucleic acid analysis apparatus that includes a cartridge body with chambers and channels for sample and reagents, and a reaction chip with detection wells, gas releasing channels, and carefully designed channel geometries to control flow resistance and direction, enabling precise nucleic acid amplification and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If molecular diagnostics are carried out in centralized laboratories with sophisticated equipment, then measurement precision and reliability are improved, but device complexity and ease of operation worsen due to requiring trained technicians and multiple pre-defined protocols
Solution Approach 1:
The patent merges multiple separate functions (sample processing, nucleic acid extraction, amplification, and detection) into a single integrated cartridge system. The cartridge body contains all necessary chambers and channels, while the reaction chip integrates detection wells with embedded reagents, eliminating the need for multiple separate instruments and trained technicians while maintaining diagnostic accuracy
Solution Approach 2:
The reaction chip serves multiple functions simultaneously: it stores reagents, performs extraction, enables amplification, and conducts detection all in one component. This multi-functional design allows a single device to replace traditional complex laboratory systems while maintaining measurement precision
2Ease of operation
If bulk equipments are integrated within a desktop device for POCT, then ease of operation and portability are improved, but manufacturing precision and reliability worsen due to removing functionalities from the platform and incorporating them into the disposable cartridge
Solution Approach 1:
The system is segmented into a reusable platform and a disposable cartridge. The cartridge body and reaction chip are designed as separate manufacturable components that can be precisely fabricated using standard microfabrication techniques, then assembled into the larger device. This segmentation allows each component to be optimized for its specific manufacturing requirements while maintaining overall system reliability
Solution Approach 2:
The reaction chip is designed as a disposable component that is pre-filled with reagents and sealed. This allows manufacturing precision to be achieved through standardized production of single-use cartridges, eliminating the need for complex sterilization and calibration procedures while ensuring consistent performance and reliability
3Ease of operation
If channel geometries are designed to control flow resistance, then flow direction control is improved, but device complexity increases due to incorporating wide channel parts, narrow channel parts, and well inlet channels
Solution Approach 1:
The channel system incorporates different local geometries (wide channel parts, narrow channel parts, and well inlet channels) at specific locations to create varying flow resistance. This local variation in channel dimensions allows precise control of fluid flow direction and distribution to each detection well without requiring complex external flow control mechanisms
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 real-time nucleic acid analysis with precise control over flow direction and dynamic behaviors, allowing for portable, efficient, and cost-effective POCT by integrating sample purification, extraction, amplification, and detection in a compact, all-in-one device suitable for decentralized healthcare.
Implementation Method 1
a flow resistance at the narrow channel part is higher than a combined flow resistance at the wide channel part and at the well inlet channel
Implementation Method 2
at least one gas releasing channel connected with the detection wells and adapted to release gas from the detection wells
Data Source
AI summary
A flow control and processing cartridge used in a nucleic acid analysis apparatus includes a cartridge body and a reaction chip. The cartridge body includes plural chambers for storing at least one sample and plural biochemical reagents and buffers, and plural channels connected with the plural chambers. The reaction chip is in conjunction with the cartridge body and includes plural detection wells, at least one main fluid channel connected with the detection wells and adapted to dispense the sample into the detection wells, and at least one gas releasing channel connected with the detection wells and adapted to release gas from the detection wells.