Microfluidic Tissue Processor for Rapid IHC
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Solution Overview
Problem
Current immunohistochemistry (IHC) techniques face challenges with long processing times, limited accuracy in quantitative analysis, and high infrastructure and equipment requirements, making them unsuitable for intra-operative use and inaccessible to remote or low-budget clinics, and inefficient for new biomarker discoveries.
Innovation Solution
A Microfluidic Tissue Processor (MTP) with a large, shallow chamber and distributed microfluidic channel network allows for rapid and uniform exposure of tissue slices to bioreagents, shifting the transport mechanism from diffusion to advection, enabling short incubation times and accurate quantitative analysis, and is designed for portability and standard tissue slide compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional IHC processing is used, then tissue sections can be processed with standard equipment, but the processing time is long (3-24 hours)
Solution Approach 1:
The patent uses a microfluidic system with pumps and fluid flow to deliver bioreagents through distributed channels to tissue sections. The hydraulic flow mechanism enables rapid and uniform reagent distribution across the tissue surface, reducing processing time from hours to minutes while maintaining standard equipment compatibility.
Solution Approach 2:
The patent divides the reagent delivery system into multiple distributed microfluidic channels that independently transport bioreagents to different regions of the tissue section. This segmentation allows parallel processing across the tissue surface, significantly increasing processing speed compared to conventional single-point or manual application methods.
2Measurement precision
If conventional IHC processing is used, then standard glass slides can be used, but the quantitative analysis accuracy is limited
Solution Approach 1:
The distributed microfluidic channel network segments the reagent delivery across multiple pathways, ensuring that bioreagents reach all regions of the tissue section simultaneously and uniformly. This eliminates the non-uniform exposure that limits quantitative accuracy in conventional methods.
Solution Approach 2:
The patent changes the delivery parameter from manual or gravity-based application to pump-controlled microfluidic flow. This enables precise control of flow rate, pressure, and timing, achieving uniform bioreagent exposure across the tissue surface and enabling accurate quantitative analysis.
3Productivity
If automated tissue processors are used, then multiple slides can be processed in parallel, but the equipment complexity and infrastructure requirements are high
Solution Approach 1:
The patent uses multiple independent microfluidic channels that can process multiple tissue sections simultaneously on a single slide or across multiple slides. This segmented parallel processing architecture achieves high throughput without requiring complex automated processor equipment.
Solution Approach 2:
The microfluidic device is designed with universal compatibility for standard glass slides and can process multiple tissue sections using the same apparatus. The distributed channel network serves multiple functions including reagent delivery, washing, and visualization, reducing overall equipment complexity.
4Ease of operation
If conventional IHC processing is used, then existing laboratory infrastructure can be used, but the processing time prevents intra-operative use
Solution Approach 1:
The microfluidic system uses pump-driven hydraulic flow to rapidly deliver bioreagents across the tissue surface, reducing processing time from hours to minutes. This enables intra-operative use while maintaining compatibility with existing laboratory infrastructure through standard slide formats and reagents.
Solution Approach 2:
The distributed channel network segments reagent delivery to multiple tissue regions simultaneously, enabling rapid parallel processing that fits within intra-operative timeframes while using standard equipment and procedures.
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 MTP significantly reduces processing time, enhances accuracy, and makes IHC more accessible by enabling rapid and uniform bioreagent exposure, achieving 1000-fold improvement over conventional techniques in terms of time and cost, while being robust and compatible with standard equipment and reagents.
Implementation Method 1
allows for rapid and uniform exposure of tissue slices to bioreagents, shifting the transport mechanism from diffusion to advection
Implementation Method 2
The tissue chamber is formed by sealing the tissue slide to the microfluidic device part using an o-ring
Data Source
AI summary
A biological and chemical sample processing device that b. comprises a high pressure-resistant, shallow and wide area microfluidic chamber having at least one wall formed by a detachable slide containing samples such as immobilized entities, biological samples or molecules, c. comprises an arrangement of microfluidic access holes for injecting to and collecting fluid form said chamber, d. is interfaced with inlet ports and microfluidic channels which are formed external to the chamber, e. is configured so that the slide may be brought into contact with the device to form the said chamber, f. is adapted to deliver and to transport fluidic substances and reagents inside said chamber in a fast manner, preferably within less than 15 seconds, and in a regular or uniform way owing to said arrangement of microfluidic access holes.