Fabric Microfluidic Diagnostics With Thread-Guided Sample Flow
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Solution Overview
Problem
Existing medical diagnostic systems require sequential and additional steps for sample processing, leading to potential contamination, errors, and high costs, and there is a need for an affordable, scalable, and accessible microfluidic system for in-home diagnostic testing.
Innovation Solution
A fabric-based microfluidic device with hydrophobic and hydrophilic threads, integrated with mechanical stages and electrical components, enables on-site analysis of bodily fluids like blood and saliva, optimizing fluid flow and reaction paths for various diagnostic tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional clinical laboratory testing is used, then high accuracy and precision are achieved, but costs increase and processing steps become complex
Solution Approach 1:
The patent combines multiple diagnostic testing functions into a single integrated microfluidic device. The device integrates sample processing, reagent delivery, reaction chambers, and detection systems into one unified platform, eliminating the need for sequential manual transfers and multiple separate tests that characterize traditional laboratory workflows.
Solution Approach 2:
The microfluidic device is designed to perform multiple diagnostic functions simultaneously or sequentially within a single system. The device can handle different sample types (blood, urine, saliva), support various assay formats, and provide both quantitative and qualitative analysis, making it a universal diagnostic platform that replaces multiple specialized laboratory instruments.
2Adaptability or versatility
If multiple sequential processing steps are used in laboratory testing, then comprehensive analysis is achieved, but chances of contamination and operator error increase
Solution Approach 1:
The microfluidic device is designed to perform self-contained processing steps without requiring manual intervention between operations. The integrated system automatically progresses samples through processing stages, reagent addition, reaction, and detection without operator transfer, eliminating opportunities for contamination and human error while maintaining comprehensive analysis capabilities.
Solution Approach 2:
The device uses controlled microfluidic channels and automated liquid handling systems as intermediaries between sample introduction and analysis. These controlled fluid pathways replace manual sample transfers, providing precise control over sample-reagent interactions and eliminating the variability and contamination risks associated with manual handling.
3Reliability
If traditional laboratory-based diagnostic systems are used, then professional testing is available, but accessibility and frequency of testing are limited
Solution Approach 1:
The patent employs disposable microfluidic devices that can be used once and then discarded. These single-use devices eliminate the need for expensive, complex, and maintainance-intensive laboratory equipment, making diagnostic testing accessible to individuals who can afford the disposable device cost while providing professional-grade analysis capabilities.
Solution Approach 2:
The device replaces complex mechanical laboratory infrastructure with a simplified microfluidic system that can be operated in home or point-of-care settings. The integrated electronic controls, automated fluid handling, and compact design substitute for traditional mechanical laboratory equipment, enabling professional testing in accessible locations.
4Shape
If PDMS elastomer microfluidic devices are used, then complex channel structures are created, but manufacturing scalability is limited
Solution Approach 1:
The patent transitions from soft lithography using PDMS elastomer to 3D printing technology, fundamentally changing the manufacturing parameter space. This enables the creation of complex three-dimensional channel structures and integrated components that are difficult to achieve with traditional soft lithography, while also improving scalability through additive manufacturing processes.
Solution Approach 2:
The device utilizes flexible thin-film structures and membrane components that can be easily manufactured and sealed. The microfluidic channels are formed in thin-film substrates that can be produced through 3D printing or other scalable methods, replacing the need for thick PDMS elastomer casting and bonding processes.
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 efficient, accurate, and cost-effective in-home diagnostic testing by reducing the need for laboratory samples, allowing individuals to conduct multiple clinical tests independently, with results saved and reported via smartphone applications.
Implementation Method 1
a fabric substrate made of one or more threads which have hydrophobic nature and one or more threads which have hydrophilic nature
Data Source
AI summary
A fabric based microfluidic point of care at home diagnostic system is disclosed. The system comprising a fabric substrate one or more hydrophobic threads bound with one r more hydrophilic threads by means of weaving, knitting, embroidering, or sewing. The fabric is configured to define a flow path for a sample to flow from an introduction zone, to a preparation zone, to a testing zone, in a pattern sufficient to optimize the sample analysis required for sample diagnostic tests. The system further comprises one or more mechanical stages and one or more fluid cartridges. The mechanical stages comprise electrical and/or analytical equipment configured to record, detect, analytes or facilitate chemical reactions and/or condition of the air above the fabric to ensure sufficient for analysis. The fluid cartridges are attached to the edge of the fabric in certain zones to supply the fabric with reagents required for analysis in that zone.