Portable Molecular Diagnostics With Integrated Thermal Cycling
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Solution Overview
Problem
Existing molecular diagnostic devices are complex, expensive, and require specialized equipment and expertise, making them unsuitable for point-of-care use.
Innovation Solution
A portable diagnostic device with a piston that cycles between two positions to thermally process a fluid for molecular analysis, using heating coils and an actuator to control temperature changes, enabling real-time detection and amplification of nucleic acids without the need for a traditional piston.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional molecular diagnostic devices are used, then detection accuracy is improved, but device complexity increases and portability is reduced
Solution Approach 1:
The patent combines multiple diagnostic functions (sample preparation, thermal cycling, and detection) into a single integrated microfluidic chip. The chip integrates reaction chambers, heating elements, and detection components, eliminating the need for separate equipment and reducing overall system complexity while maintaining diagnostic accuracy.
Solution Approach 2:
The patent employs a nested structure where the microfluidic chip is inserted into a portable housing that contains the power source and control electronics. The reaction chambers are nested within the chip, and the entire assembly fits within a handheld device, enabling portability without sacrificing functional capabilities.
2Measurement precision
If traditional molecular diagnostic devices are used, then detection accuracy is improved, but cost increases
Solution Approach 1:
The patent employs disposable microfluidic chips that are pre-loaded with reagents and designed for single-use. This eliminates the need for expensive, reusable components and reduces sterilization and maintenance costs. The chips can be manufactured using low-cost techniques such as mold injection or laser cutting, making the overall system more affordable.
Solution Approach 2:
The microfluidic chip is designed to perform sample preparation and processing automatically without requiring external equipment or specialized technical expertise. The integrated design allows the chip to self-regulate fluid flow and thermal cycling, reducing the need for expensive auxiliary devices and trained operators.
3Productivity
If traditional molecular diagnostic devices are used, then amplification capability is improved, but portability is reduced
Solution Approach 1:
The patent replaces traditional mechanical thermal cyclers with微型 heating elements integrated directly into the microfluidic chip. These heating elements are controlled by a simple microcontroller, eliminating the need for bulky mechanical components and enabling portability while maintaining amplification capability.
Solution Approach 2:
The patent uses periodic thermal cycling achieved through pulsed heating elements to drive nucleic acid amplification. The heating elements are activated in cycles to create the necessary temperature variations for PCR, and this periodic action is achieved without requiring large mechanical systems, thus enabling portability.
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
The device provides a cost-effective, simple-to-use, and portable solution for molecular diagnostics, allowing for efficient nucleic acid amplification and detection at the point of care.
Implementation Method 1
the first heat source comprises a first heating coil configured to increase the temperature of the first end of the housing when electric current is applied to the first heating coil; and the second heat source comprises a second heating coil configured to increase the temperature of the second end of the housing when electric current is applied to the second heating coil
Data Source
AI summary
This disclosure relates to apparatus and methods for molecular diagnostics. Certain embodiments include a piston cycled from a first position proximal to a first end of a housing, to a second position proximal to a second end of the housing, and back to the first position proximal to the first end of the housing. In some embodiments, the present disclosure relates to devices, methods, and systems for molecular diagnostics that do not comprise a piston.