Rotating Carousel for Microarray Drying and Imaging
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Solution Overview
Problem
Molecular assays for clinical use are limited in identifying more than six genetic sequences and require expensive equipment for microarray imaging, necessitating simpler, more efficient, and cost-effective methods for performing molecular tests using microarray technology.
Innovation Solution
A Lateral Flow Cell positioning system that includes a carousel with a sample loading tray and a motor-driven rotor, capable of rotating at high speeds to dry microarray elements and position them for imaging, integrated with a sample purification device, temperature control module, and imaging device for efficient analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If microarray imaging is performed with water present, then the imaging process is simpler, but the signal-to-noise ratio deteriorates
Solution Approach 1:
The system performs preliminary drying of the microarray elements by rotating the carousel at high speed before imaging. This removes water from the microarray elements in advance, ensuring optimal signal-to-noise ratio during the subsequent imaging process without requiring complex water removal equipment
2Measurement precision
If a carousel rotation system is added for drying microarray elements, then the signal-to-noise ratio improves, but the device complexity increases
Solution Approach 1:
The carousel serves multiple functions: it positions the lateral flow cells for imaging, dries the microarray elements through high-speed rotation, and indexes the reaction chambers into position. This multi-functionality reduces the need for separate drying equipment, overall reducing device complexity while maintaining improved signal-to-noise ratio
Solution Approach 2:
The high-speed rotation of the carousel itself generates the centrifugal force needed to dry the microarray elements. The system uses its own motion to achieve drying without requiring external drying equipment, simplifying the overall device architecture
3Productivity
If high-speed rotation is used to dry microarray elements, then the drying efficiency improves, but the mechanical stress on the cartridge increases
Solution Approach 1:
The system uses dynamic high-speed rotation to achieve rapid drying. The carousel rotates at speeds sufficient to generate centrifugal force for drying, then dynamically indexes into imaging position. This dynamic approach achieves efficient drying while the brief duration of high-speed rotation minimizes cumulative mechanical stress on the cartridge
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
Enables the efficient drying and imaging of microarray elements, allowing for the detection and analysis of multiple genetic sequences with improved signal-to-noise ratios and reduced costs, enhancing the sensitivity and specificity of molecular testing.
Implementation Method 1
Rotation of the carousel translates to a cartridge containing LFCs with typical rotational velocities in the range upwards of 200 rpm (e.g., 200-5000 rpm). This centrifugal force drives the water droplets within the reaction chambers toward an absorbent, leaving the reaction chamber in a dry state.
Implementation Method 2
a reaction chamber comprising a hydrophilic interior surface configured to hold a microarray comprising a plurality of nucleic acid-based probes
Data Source
AI summary
A positioning system for a sample analysis device is disclosed. The positioning system comprises (1) a carousel comprising a platform and a sample loading tray mounted on the platform, and (2) a stage comprising a positioning system for positioning the carousel under the optical path of an imaging system. The sample loading tray is configured for holding a cartridge comprising one or more lateral flow cells (LFCs).