Biological Slide Processing Device with Capillary Gap and Water Bath Heating
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Solution Overview
Problem
Current automated biological slide specimen processing devices face challenges such as inefficiency, poor reproducibility, and uneven heating, which lead to issues like reagent evaporation, drying, and incomplete coverage, due to separate heating of slides and mechanical limitations in reagent dispensing.
Innovation Solution
A fully-automated device with a testing assembly, including a heating device, dispensing nozzles, and scanners for barcode and QR code identification, that processes multiple slides simultaneously in a controlled environment, ensuring uniform heating and precise reagent dispensing through a capillary gap system, maintaining the reagent coverage and reducing operational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If slides are heated separately by baking, then heating function is provided, but reagent evaporation and drying occur
Solution Approach 1:
Multiple slides are placed in a single container and heated together in a water bath instead of heating each slide separately. This merging approach maintains uniform temperature distribution across all slides while the water environment prevents reagent evaporation and drying that occurs with separate baking heating.
Solution Approach 2:
The heating method is changed from dry baking to water bath heating. This parameter change in the heating medium (from air to water) fundamentally alters the thermal environment, providing gentle uniform heating while preventing reagent evaporation through the water vapor saturation environment.
2Ease of operation
If reagent is dispensed from above the slide, then dispensing is simple, but specimen coverage is incomplete
Solution Approach 1:
The reagent dispensing approach transitions from vertical dispensing from above to horizontal capillary flow along the slide surface. By changing the dimension of reagent delivery from top-down to edge-parallel flow, the reagent naturally spreads across the entire specimen area through capillary action, ensuring complete coverage.
3Ease of operation
If slides are processed horizontally, then operation is simple, but space consumption is large and throughput is limited
Solution Approach 1:
Slides are reoriented from horizontal to vertical positioning within the container. This dimensional change allows multiple slides to be stacked or arranged vertically in the same footprint space, dramatically increasing the number of slides that can be processed simultaneously without increasing the instrument's horizontal space requirements.
4Power
If heating is performed at high temperature, then heating efficiency is high, but bubbles accumulate and cause uneven heating
Solution Approach 1:
The heating temperature parameter is optimized to a moderate range (37-42°C) rather than high temperature. This parameter change prevents excessive bubble formation while the water bath medium ensures uniform heat distribution. The gentle heating approach eliminates the bubble-related heating non-uniformity that occurs with high-temperature baking methods.
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 device enables rapid, reliable, and efficient processing of a large quantity of slide specimens with uniform heating and accurate reagent dispensing, improving reproducibility and reducing operational errors, while maintaining reagent coverage and preventing evaporation.
Implementation Method 1
maintaining the reagent coverage and reducing operational complexity
Implementation Method 2
ensuring uniform heating
Data Source
AI summary
A fully-automated biological slide specimen processing device and a method. The device mainly includes a testing assembly, a base platform, a Z-arm, an X-arm, a Y-arm, a dispensing nozzle and scanning devices for identifying a reagent and a specimen. The device in the present invention can automatically realize regular and quantitative dispensing according to testing process requirements and testing steps, automatically control the heating, automatically control liquid filling and liquid discharging, and realize full automation of the testing process. When the slide specimen needs a heat treatment, an insertion slot may be directly filled with liquid and be heated.