Microfluidic Reagent Container for Stable Dry Chemistry Integration
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Solution Overview
Problem
Existing microfluidic devices face challenges in integrating and handling freeze-dried reagents due to their sensitivity to humidity and fragility, which complicates their manipulation and integration with microfluidic systems.
Innovation Solution
A container design that securely holds and transports freeze-dried reagents, featuring a housing with controlled environments and secure coupling mechanisms to microfluidic devices, ensuring stability and ease of integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If freeze-dried reagents are handled in a controlled environment to maintain low humidity, then reagent stability is improved, but device complexity increases
Solution Approach 1:
The container is nested within the microfluidic cartridge, creating a hierarchical structure where the outer cartridge provides the controlled environment and the inner container holds the reagents. This nesting eliminates the need for separate controlled environment chambers while maintaining reagent stability.
Solution Approach 2:
The invention merges the reagent storage container with the microfluidic cartridge by providing a receptacle on the cartridge that receives and secures the container. This integration combines the controlled environment functionality with reagent storage, simplifying the overall device structure.
2Ease of operation
If excessive force is applied to freeze-dried reagents, then reagent integration into the device is improved, but reagent integrity deteriorates
Solution Approach 1:
The container acts as an intermediary between the reagents and the microfluidic device. It provides a protective interface that allows reagents to be transferred into the device without direct manual manipulation, eliminating the risk of applying excessive force while maintaining integration capability.
Solution Approach 2:
Reagents are pre-loaded into the container in a controlled environment before insertion into the microfluidic device. This preliminary action ensures reagents are properly positioned and protected before they need to be accessed, preventing damage during subsequent handling.
3Reliability
If freeze-dried reagents are kept in a controlled environment, then reagent stability is improved, but ease of operation deteriorates
Solution Approach 1:
The container is designed with a removable lid that can be opened to access reagents. This extraction of the lid function allows users to access reagents without opening the entire container or requiring complex controlled environment procedures, significantly improving ease of operation while maintaining stability.
4Reliability
If a secure coupling mechanism is used to hold the container in the microfluidic device, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The coupling system is segmented into distinct components: a receptacle on the microfluidic cartridge and a corresponding interface on the container. This segmentation allows each component to be optimized independently while maintaining overall reliability, and simplifies the coupling mechanism compared to integrated designs.
Data Source
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AI summary
A microfluidic system is presented that includes a cartridge, a container, and a lid for the container. The cartridge includes a plurality of microfluidic channels coupled to one or more chambers. The container holds dry chemicals and includes a housing with a first opening and a second opening smaller than the first opening. The container is designed to be inserted into an opening of the cartridge, such that the container is independently secured within the opening. The insertion of the container allows for the container to be fluidically coupled with a microfluidic channel of the plurality of microfluidic channels via the second opening. The lid includes a column that extends from the lid into the container.