Feedback Control for Rare Cell Detection Assays
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Solution Overview
Problem
Conventional methods for rare cell detection, such as ICC and ISH, face challenges with high background noise and low signal efficiency due to non-specific binding and evaporation, which can lead to false positives and reduced detection rates, especially when combining ICC and ISH techniques.
Innovation Solution
An automated system with feedback control and temperature control elements is implemented to maintain optimal fluid concentration and flow, reducing background noise and enhancing signal detection by adjusting fluid delivery and temperature settings based on real-time sensor feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ICC and ISH methods are used for rare cell detection, then detection capability is achieved, but background noise increases and signal efficiency decreases due to non-specific binding and evaporation
Solution Approach 1:
The patent implements a feedback control system using sensors to monitor fluid concentration and evaporation in real-time during ICC and ISH assays. The system automatically adjusts reagent delivery and incubation conditions based on sensor feedback, compensating for evaporation losses and maintaining optimal fluid concentrations. This reduces background noise caused by concentration variations and improves rare cell detection accuracy by ensuring consistent assay conditions throughout the process.
Solution Approach 2:
The patent dynamically adjusts critical assay parameters including fluid concentration, temperature, and incubation time based on real-time monitoring. By changing these parameters adaptively rather than using fixed protocols, the system optimizes signal-to-noise ratio during the assay, reducing non-specific binding background while maintaining specific signal detection efficiency for rare cells.
2Adaptability or versatility
If manual ICC and ISH procedures are performed, then flexibility in assay optimization is maintained, but evaporation and non-specific binding increase leading to false positives
Solution Approach 1:
The automated system incorporates real-time feedback control that monitors and adjusts assay conditions to maintain optimal parameters throughout the procedure. This ensures reliable, reproducible results by eliminating manual handling variability and preventing evaporation-related artifacts that cause false positives, while still allowing protocol customization for different assay requirements.
Solution Approach 2:
The system performs self-adjustment of reagent volumes and incubation conditions based on sensor feedback, automatically compensating for evaporation and maintaining optimal assay conditions without continuous manual intervention. This self-regulating capability improves reliability by ensuring consistent execution of optimized protocols while preserving the ability to program different assay configurations.
3Device complexity
If fluid delivery is not controlled during ICC/ISH assays, then procedure simplicity is maintained, but evaporation causes concentration changes leading to increased background noise
Solution Approach 1:
The system uses sensors to monitor fluid levels and concentration parameters in real-time, with automatic feedback control adjusting reagent delivery to compensate for evaporation. This maintains optimal concentrations throughout the assay without requiring complex manual monitoring or adjustment procedures, reducing background noise while keeping the operational interface simple for the user.
Solution Approach 2:
The patent replaces manual fluid handling and monitoring with automated sensor-based detection and computer-controlled reagent delivery. This substitution eliminates the need for complex manual procedures while providing precise control over fluid concentrations, reducing evaporation-related background noise through automated compensation rather than user intervention.
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 significantly improves rare cell detection by minimizing background noise and enhancing signal amplification, leading to more accurate and reliable identification of rare cells through reduced evaporation and optimized assay conditions.
Implementation Method 1
Feedback control thus ensures a proper concentration of components and optimal flow volume over the duration of the assay, which both reduces background noise and enhances signal detection
Implementation Method 2
In addition, in certain aspects, a temperature control element is provided that can be positioned over a membrane of a filtration apparatus to optimize the temperature on the membrane
Data Source
Figure 1A~1B
Figure 2
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AI summary
There is provided a system (10) and method (100) for improving ICC and/or ISH rare cell detection by lowering background noise and providing enhanced detection of rare cells (15). In an embodiment, background noise for an ICC and/or an ISH rare cell detection assay is reduced and rare cell signaling is enhanced via feedback control. To accomplish the feedback control, an electronic control circuit (24) can direct a fluid delivery apparatus (18) to add an adjustment amount to account for fluid loss in the system (10) when fluid loss is indicated.