Cold Formalin Tissue Transport Assembly for Consistent Fixation
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Solution Overview
Problem
Current methods for tissue sample preservation and transport result in inconsistent fixation, leading to under-fixation or over-fixation, compromising biomarker preservation and downstream diagnostic processes, with inadequate tracking and temperature control during transport.
Innovation Solution
An integrated system for tissue sample transport and storage that includes a sample container with a cold formalin-based fixative, temperature-responsive elements, and a cooling mechanism to maintain fixative at 0-10°C, combined with electronic tracking and monitoring, ensuring optimal fixation and biomarker preservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If tissue samples are placed in warm formalin for fixation, then fixation speed is improved, but biomarker preservation deteriorates due to over-fixation
Solution Approach 1:
The patent changes the temperature parameter of the fixative from warm/room temperature to cold temperature (0-10°C). This parameter change slows down the fixation reaction rate, allowing complete diffusion through the tissue sample without causing over-fixation, thereby preserving biomarkers while maintaining fixation completeness.
Solution Approach 2:
The patent performs preliminary diffusion of the fixative at cold temperature before the actual fixation process. This preliminary action allows the fixative to penetrate throughout the entire tissue sample completely, and then the fixation is completed in a controlled manner, preventing both under-fixation and over-fixation.
2Manufacturing precision
If fixation time is extended to ensure complete diffusion, then fixation completeness is improved, but tissue morphology deteriorates due to over-fixation
Solution Approach 1:
The patent uses cold temperature (0-10°C) to control the fixation process. This temperature parameter allows extended diffusion time without causing excessive cross-linking, thereby achieving complete fixation while preserving tissue morphology. The cold temperature acts as a protective parameter that prevents over-fixation even during prolonged exposure.
3Ease of manufacture
If conventional room temperature fixation is used, then processing simplicity is maintained, but diagnostic accuracy deteriorates due to inconsistent fixation
Solution Approach 1:
The patent incorporates temperature monitoring and control mechanisms that provide feedback on the fixation process. This allows real-time monitoring of temperature and fixation progress, enabling precise control to achieve consistent and reliable fixation results, thereby improving diagnostic accuracy while maintaining operational simplicity through automated control.
4Device complexity
If manual tracking of tissue samples is used, then system complexity is reduced, but tracking accuracy deteriorates leading to fixation errors
Solution Approach 1:
The patent implements self-monitoring capabilities where the fixation system automatically tracks and records its own parameters (temperature, time, exposure levels). This self-service approach eliminates the need for complex external manual tracking systems while providing precise, automated monitoring that improves tracking accuracy and prevents fixation errors.
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
Achieves superior fixation results, preserving biomarkers for up to 14 days, enabling real-time tracking, and ensuring consistent sample quality for diagnostics, with optional electronic chain-of-custody verification.
Implementation Method 1
maintain fixative at 0-10°C
Implementation Method 2
lower temperature formalin can significantly decrease the cross-linking rate
Implementation Method 3
NBF diffuses into a tissue section and cross-links proteins and nucleic acids
Implementation Method 4
This fixative forms cross-links between formaldehyde molecules and amine containing cellular molecules
Data Source
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AI summary
A tissue sample that has been removed from a subject can be evaluated. A transporter system for carrying a tissue sample includes a transport container, a fixative in the transport container, and a cooling device that reduces and/or maintains the temperature of the fixative to perform a pre-soaking process. A portable transporter system adapted to carry a tissue sample contacting a fixative, can include: a transport container including: a holding chamber; and a fixative; and a container lid including: a cassette holder operable to be coupled to the standard histology cassette and including a first seal; and a cassette receiver operable to be releasably coupled to said transport container and including a second seal, where the cassette holder and cassette receiver are operable to be attachably coupled to one another upon insertion of a standard histology cassette coupled to the cassette holder into the cassette receiver.