Automated Cell Sample Preparation for Consistent Slide Distribution
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Solution Overview
Problem
Conventional manual methods for preparing cell samples for analysis result in inconsistent cellularity and compromised samples due to human error, leading to suboptimal slide preparation and potential need for recollection.
Innovation Solution
An automated system for thin-layer cell sample slide preparation using variable dilutions and cell adherent dilutions based on cellularity, with quantitative assessment and precise fluid control to ensure consistent cell distribution and adherence to slides without compromising the original sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual methods are used to prepare cell samples on slides, then the process is simple and requires minimal equipment, but the cellularity is inconsistent and samples are compromised due to human error
Solution Approach 1:
The system automatically performs cellularity assessment, dilution calculations, and sample preparation without human intervention. The automated apparatus measures cell pellet characteristics, calculates required diluent volumes, and executes the preparation protocol independently, eliminating human error while maintaining simple operation through automated workflows
Solution Approach 2:
Manual visual observation and estimation are replaced with automated optical measurement systems that quantitatively assess cellularity. The mechanical act of manual pipetting and mixing is substituted with automated fluid handling systems that precisely control dilution volumes and mixing parameters
2Reliability
If cell adherent is added to the cell suspension to improve cell adherence to slides, then cell adherence is enhanced, but the cell suspension is compromised for future testing
Solution Approach 1:
The preparation process is divided into separate stages: cellularity assessment, dilution calculation, and selective cell adherent addition. By segmenting the workflow, the system adds cell adherent only when needed for specific preparation types while preserving undiluted backup samples for future testing without compromise
Solution Approach 2:
The system performs quantitative cellularity assessment and calculates optimal dilution parameters before adding cell adherent. This preliminary characterization allows precise control over when and how much cell adherent is added, ensuring adherence needs are met while minimizing impact on sample integrity through controlled, informed decisions
3Measurement precision
If visual observation is used to estimate cell pellet size, then the process is quick and requires no additional equipment, but the estimation is inaccurate and inconsistent
Solution Approach 1:
Manual visual estimation is replaced with automated optical measurement systems that use light scattering, absorption, or imaging techniques to quantitatively determine cell pellet characteristics. This substitution provides objective, repeatable measurements while the automated nature keeps the user interface simple
Solution Approach 2:
An optical measurement system serves as an intermediary between the cell pellet and the operator. This intermediary objectively quantifies cellularity by measuring physical properties of the pellet, translating complex biological information into actionable data without requiring human interpretation
4Manufacturing precision
If manual dilution and deposition is performed by hand, then the process is flexible and adaptable, but inaccuracies occur resulting in poorly prepared slides
Solution Approach 1:
The automated apparatus independently performs dilution calculations based on measured cellularity, executes precise fluid dispensing, and controls mixing parameters. This self-service capability eliminates manual inaccuracies while presenting a simple automated interface to the user
Solution Approach 2:
The system dynamically adjusts dilution volumes, mixing speeds, and deposition parameters based on real-time cellularity measurements. By changing these parameters automatically rather than using fixed protocols, the system achieves high precision while maintaining adaptability through software-controlled adjustments
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 provides uniform and consistent cell samples for analysis, reducing human error and maintaining sample integrity, resulting in improved diagnostic reliability and reduced need for recollection.
Implementation Method 1
centrifugation is used to separate cells from other portions (e.g., the supernatant) of the cell sample within a centrifugation tube. Because the cells are heavier than the other portions of the sample, the cells form a pellet in the bottom of the centrifugation tube
Data Source
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AI summary
An apparatus and method for automatic uniform thin-layer cell sample slide preparation without human intervention are disclosed. According to one embodiment, a cell sample is measured to derive a cell sample measurement. An estimation of total cellularity of the cell sample is determined based upon the cell sample measurement. A differential volume of diluent is dispensed to the cell sample based upon the estimation of total cellularity of the cell sample to form a cell suspension. A differential volume of the cell suspension and a differential volume of cell adherent are combined based upon the estimation of total cellularity of the cell sample to form a cell mixture. A differential volume of the cell mixture is dispensed directly on a surface of a sample slide.