Capillary Assay Automation for Parallel Micro-Volume Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for analyzing microliter volumes of biological substances are cumbersome, time-consuming, and difficult to automate, limiting the ability to analyze multiple samples simultaneously with minimal reagent consumption and high sensitivity.
Innovation Solution
An automated assay system that uses capillaries as both pipettes and fluid paths, enabling simultaneous analysis of multiple samples through electrophoretic or isoelectric focusing separation, immobilization, and chemiluminescent detection, with a capillary gripper and manifold for automated fluid handling and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If traditional methods are used for analyzing microliter volumes of biological substances, then analysis can be performed, but the process is cumbersome, time-consuming, and difficult to automate
Solution Approach 1:
The patent combines multiple functions (pipetting, separation, detection) into a single integrated capillary system. The capillary serves as both the fluid handling conduit and the separation medium, eliminating the need for separate pipettes and complex fluid path configurations, thereby enabling automation while reducing overall system complexity.
Solution Approach 2:
The capillary is designed to perform multiple functions: it acts as a pipette for fluid transfer, a separation medium for electrophoresis or isoelectric focusing, and a detection chamber for optical analysis. This multi-functionality allows a single component to replace multiple separate devices, facilitating automation and simplifying the overall process.
2Productivity
If multiple samples are analyzed simultaneously using traditional methods, then throughput increases, but reagent consumption and processing time increase significantly
Solution Approach 1:
The system uses multiple individual capillaries, each capable of independent sample analysis. This segmentation allows parallel processing of multiple samples while each capillary consumes minimal reagents. The capillaries can be processed simultaneously or sequentially, providing flexibility in throughput while maintaining low reagent consumption per sample.
Solution Approach 2:
The patent transitions from two-dimensional slab gel analysis to one-dimensional capillary analysis. This dimensional change enables much smaller sample and reagent volumes while maintaining analytical capability. Multiple capillaries can be arranged in parallel, providing high throughput with minimal reagent consumption due to the small internal volume of each capillary.
3Reliability
If manual handling and processing steps are used, then flexibility is maintained, but reproducibility decreases and automation becomes difficult
Solution Approach 1:
By merging fluid handling and separation functions into the capillary, the system eliminates multiple manual transfer steps between different devices. The capillary remains in a single location throughout the analysis, allowing for automated fluid introduction and detection without manual intervention, thereby improving reproducibility and enabling automation.
Solution Approach 2:
The patent extracts the separation and detection functions directly into the capillary itself, removing the need for separate transfer steps to gels or other media. This extraction of functions into a single integrated component eliminates sources of variability associated with manual handling and enables straightforward automation.
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 simplifies automation, reduces reagent consumption, and improves robustness by allowing parallel processing of multiple capillaries, providing efficient analysis of small volume biological samples with high sensitivity and reproducibility.
Implementation Method 1
electrodes in contact with each of the first and second fluid reservoirs, wherein fluids in the reservoirs are retained at the respective ends of the capillaries by surface tension
Implementation Method 2
conducting one or more of electrophoretic or isoelectric focusing separation
Implementation Method 3
conducting one or more of electrophoretic or isoelectric focusing separation
Data Source
AI summary
An automated assay system is described with stations for placement of materials to be used in an assay of materials inside capillaries and an automated gripper for manipulating capillaries. The system includes a separation and immobilization station where reactions inside the capillaries take place and a detector station where photoemissions from the capillary reactions are detected. The photoemissions from the capillaries may be displayed as line graphs or in columns of a pseudo-gel image resembling the familiar Western gel blot. An automated control system has a user interface by which an operator can select a run protocol and define the locations of samples and reagents to be used in the protocol run. Following the setup the control system will cause the automated system to execute the protocol, then display the results in a selected display format.