Specimen Slide Alignment Mechanism for Automated Processing
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Solution Overview
Problem
Current methods for preparing biological specimens for analysis, such as microscopy and microarray analyses, are labor-intensive and prone to inconsistencies due to manual techniques, leading to contamination, waste, and inefficient use of reagents, especially in immunohistochemical and in situ hybridization staining processes where diffusion rates of biomolecules are slow and costly.
Innovation Solution
An automated specimen processing system that includes a slide alignment device with movable aligning members for precise slide positioning, a transfer head with vacuum capabilities for handling slides, and a carousel-based reagent dispensing system that minimizes reagent volume and prevents cross-contamination, using capillary action and controlled temperature to manage reagents effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual techniques are used for preparing biological specimens, then flexibility and adaptability are maintained, but labor intensity increases and processing consistency deteriorates
Solution Approach 1:
The automated slide processing system performs specimen preparation tasks autonomously without continuous manual intervention. The system self-regulates reagent dispensing, slide transport, and processing parameters, eliminating labor-intensive manual operations while maintaining consistent processing quality and improving throughput capacity.
Solution Approach 2:
Manual mechanical operations for slide handling, reagent application, and specimen processing are replaced with automated mechanical systems. The system uses robotic arms, automated dispensers, and controlled transport mechanisms to perform tasks previously done manually, thereby increasing productivity while maintaining operational flexibility through programmable control.
2Ease of operation
If manual specimen preparation is used, then operational flexibility is maintained, but processing consistency and reliability deteriorate
Solution Approach 1:
The automated system incorporates sensors and control systems that continuously monitor processing parameters such as reagent dispensing volume, slide position, and temperature. This feedback mechanism ensures consistent execution of processing steps and maintains reliability by automatically correcting deviations from predetermined protocols, eliminating variability introduced by manual techniques.
Solution Approach 2:
The system maintains reliability by precisely controlling critical processing parameters including reagent concentration, dispensing rate, incubation temperature, and exposure time. These parameters are automatically adjusted and maintained within specified ranges throughout processing, ensuring consistent results that are difficult to achieve with manual techniques.
3Productivity
If automated machines use batch processing with open baths, then processing speed is improved, but reagent contamination and waste increase
Solution Approach 1:
The system divides the processing system into separate, isolated stations for different processing steps (reagent application, incubation, washing, drying). Each station uses dedicated reagent reservoirs and processing areas, preventing cross-contamination between batches and reducing reagent waste by allowing precise control of reagent usage at each segment rather than requiring large volumes in shared baths.
Solution Approach 2:
The system extracts and eliminates the open bath configuration from batch processing. Instead, individual reagent application areas are created with controlled environments, preventing carryover and contamination. This extraction of the open bath concept allows maintaining batch processing throughput while eliminating the associated reagent waste and contamination problems.
4Productivity
If automated machines use batch processing with open baths, then processing throughput is improved, but reagent contamination and degradation worsen
Solution Approach 1:
The processing system is segmented into isolated stations with dedicated reagent pathways and processing areas. This segmentation prevents cross-contamination between different batches and reagents while maintaining high throughput by allowing parallel processing at multiple stations. Each segment operates independently with controlled access to reagents, eliminating the contamination risks inherent in shared open baths.
5Manufacturing precision
If precise slide alignment is implemented, then staining accuracy is improved, but device complexity increases
Solution Approach 1:
The system uses intermediary alignment features such as reference marks on slides, guide rails, and positioning fixtures that simplify the alignment process. These intermediaries provide mechanical or optical references that enable precise slide positioning without requiring complex active control systems, thereby achieving high alignment precision while minimizing 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
The system ensures consistent and efficient processing of biological specimens by reducing manual errors, minimizing reagent usage, and managing waste, while enhancing the speed and accuracy of staining processes through precise alignment and controlled reagent delivery.
Implementation Method 1
a vacuum source in communication with at least one vacuum inlet and configured to draw a sufficient vacuum to maintain the airtight seal
Implementation Method 2
The opposable element is moved relative to the slide to displace the liquid in a first direction that is substantially parallel to the longitudinal axis of the slide and toward an end of an opening between the slide and the opposable element
Data Source
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AI summary
Systems and methods that enable automated processing of specimens carried on microscope slides are described herein. Aspects of the technology are directed, for example, to automated specimen processing systems and methods of aligning and transporting specimen-bearing microscope slides in automated processing systems. The system can include, for example, an ejector assembly having a slide staging device configured to receive a slide. The ejector assembly can include, for example, a slide alignment device configured to engage the slide at a plurality of contact points for moving the slide from a misaligned position to an aligned position on the standby platform. The slide alignment device can include a first aligning member and a second aligning member positioned opposite the first aligning member on the standby platform. The first and second aligning members can be movable between an open position for receiving a slide and a closed position for aligning the slide.