Tissue Processor Automatic Medium Identification
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Solution Overview
Problem
The challenge in tissue processing is maintaining the purity of process media, such as xylene and paraffin, which becomes contaminated during the infiltration and clearing steps, leading to inconsistent quality of thin sections produced for microscopic analysis.
Innovation Solution
A method for operating a tissue processor that involves automatically measuring characteristic properties of the process medium, such as density and purity, during transfer between containers and the retort, allowing for identification and correction of contamination levels, ensuring the correct medium is used for each process step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple liquid process media with different degrees of purity are used for infiltration steps, then the quality of thin sections is improved, but the complexity of managing multiple containers and media increases
Solution Approach 1:
The patent implements automatic measurement of the process medium's characteristic properties (such as density or refractive index) during transfer and feedback control to identify and verify the correct medium. This automated feedback mechanism reduces manual monitoring complexity while ensuring the correct medium is used for each infiltration step, thereby maintaining high thin section quality without proportionally increasing operational complexity.
Solution Approach 2:
The system performs self-verification by automatically measuring the process medium properties and comparing them against expected values to confirm correct medium identification. This self-service capability eliminates the need for manual verification procedures, reducing the operational burden of managing multiple containers while ensuring consistent medium quality for producing high-quality thin sections.
2Reliability
If process media are automatically measured and identified, then reliability of operation is improved, but device complexity increases
Solution Approach 1:
The patent replaces manual verification procedures with automated measurement devices that physically measure characteristic properties of the process medium (such as density sensors or refractive index sensors). This substitution of mechanical/manual inspection with automated physical measurement improves reliability by eliminating human error while keeping the added complexity manageable through standard sensing technologies rather than complex electronic or computational systems.
Solution Approach 2:
The patent may utilize optical measurement principles where the process medium's optical properties (such as refractive index or color characteristics) are measured to identify and verify the correct medium. This approach uses well-established optical sensing that adds minimal complexity while providing reliable, automated identification of process media, thereby improving operational reliability without significant increase in device complexity.
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 ensures reliable operation of the tissue processor by accurately determining the purity of process media, preventing contamination errors and maintaining high-quality tissue samples by automatically adjusting the use of media based on measured properties.
Implementation Method 1
automatically measuring a measured value in the course of transferring the process medium, the measured value representing a characteristic property of the process medium
Data Source
AI summary
A method for operating a tissue processor and a respective tissue processor for performing this method are described for the processing tissue samples. The tissue processor comprises at least one retort for receiving the tissue samples and at least one container for receiving a process medium. The process medium is transferred at least one of from the container into the retort and from the retort into the container. A value is automatically measured in the course of transferring the process medium, the value representing a characteristic property of the process medium. The process medium is identified based on the value.