Microarray Block Core Formation via Liquid Carrier Medium Infiltration
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Solution Overview
Problem
Current methods for producing microarray blocks are not suitable for mass production of replicate sections with highly repeatable biological and physical characteristics, leading to limited yield and waste of sample material, especially in applications requiring validation and scientific control of diagnostic tests.
Innovation Solution
A method and apparatus for forming high-yield microarray blocks by mixing biological samples with a carrier medium, forming cylindrical cores with large aspect ratios, and inserting them into a recipient block, where the cores are made compatible with the block material to ensure strong bonding and integrity during sectioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If prior art methods of directly punching donor blocks or processing cells in agarose pellets are used, then the production process is simple, but the yield is limited and sample material is wasted
Solution Approach 1:
The invention changes the physical state parameters of the carrier medium from solid (agarose pellets) to liquid form, allowing complete utilization of sample material. The liquid carrier medium can flow around and incorporate all sample particles, eliminating the waste of interstitial spaces that occurs with solid matrix methods.
Solution Approach 2:
The invention transitions from two-dimensional punching surfaces to three-dimensional liquid-filled molds, allowing sample material to be utilized in all spatial dimensions. The liquid carrier medium fills the entire volume of the mold cavity, maximizing the use of available sample material throughout the three-dimensional space.
2Reliability
If prior art methods are used, then the process is straightforward, but mass production of replicate sections with highly repeatable characteristics is not achieved
Solution Approach 1:
The invention divides the production process into separate modular steps: preparing individual liquid carrier medium containers with sample material, then transferring to casting molds. This segmentation allows each step to be optimized and replicated independently, enabling mass production of consistent replicate sections while maintaining process control.
Solution Approach 2:
The liquid carrier medium automatically fills the mold cavities and conforms to the mold geometry, eliminating the need for complex alignment and positioning mechanisms. The self-leveling property of liquids provides inherent consistency across multiple replicates, achieving high repeatability without adding device complexity.
3Productivity
If cores are made with large aspect ratios, then sample material utilization increases, but bonding compatibility with recipient block material becomes more challenging
Solution Approach 1:
The invention changes the material parameters of the carrier medium to match the recipient block material properties. By using the same or compatible materials (paraffin, agarose, polyester) for both the carrier medium and recipient block, the bonding strength is maximized while allowing cores of any aspect ratio without interface failure.
Solution Approach 2:
The invention uses homogeneous material composition throughout the entire structure - the carrier medium, cores, and recipient block are all made from the same or chemically compatible materials. This material homogeneity ensures uniform bonding properties throughout the assembly, eliminating weak interfaces that would limit core aspect ratios.
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
This approach increases the utilization of sample material, reduces waste, and enables the production of microarray blocks with uniform, high-quality cores that are stable for long-term storage, facilitating mass production of replicate sections with consistent characteristics.
Implementation Method 1
mixing biological samples with a carrier medium
Implementation Method 2
forming cylindrical cores with large aspect ratios
Implementation Method 3
dehydrating the core and infiltrating it with paraffin
Data Source
Figure 1A~1J
Figure 2A~2C
Figure 3A~3C
AI summary
A method for making a microarray block that includes providing a cylindrical core of a biological sample and a carrier medium. The core is formed by pushing the carrier medium containing the sample into a tubular casting member (10) and infiltrating (370) the core with paraffin after dehydrating the carrier medium . At least a portion of the core is disposed in a recipient block (386) formed from a material.