Handheld Assay Cartridge Slide Elevation and Reagent Dispensing
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Solution Overview
Problem
There is a need for efficient assay systems capable of diagnosing bodily specimens, particularly those obtained from bodily orifices or exposed surfaces, that can handle and analyze specimens using handheld devices and integrated reagents for diagnostic purposes.
Innovation Solution
The assay system includes handheld devices with a cartridge housing and specimen slides that can be elevated for examination, featuring a built-in liquid reagent dispensing arrangement and compatibility with various EMR spectra, along with assay apparatus that can actuate the devices for specimen analysis, ensuring correct insertion and reuse detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If handheld assay devices with built-in reagent dispensing are used, then diagnostic accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions (specimen collection, reagent storage, reagent dispensing, and examination) into a single integrated handheld cartridge device. The cartridge housing integrates a specimen collection tool, reagent reservoir with dispensing mechanism, and specimen slide examination area, eliminating the need for separate devices and reducing overall system complexity while maintaining diagnostic accuracy.
Solution Approach 2:
The handheld assay device is designed as a multi-functional unit that can perform specimen collection, reagent dispensing, and diagnostic examination. The cartridge can be used with different specimen types and reagents, providing universal applicability across various diagnostic scenarios while keeping the device structure relatively simple through modular design.
2Manufacturing precision
If specimen slide elevation mechanism is integrated, then examination quality is improved, but manufacturing complexity increases
Solution Approach 1:
The specimen slide is designed to be movable rather than fixed, allowing it to be elevated from a lower loading position to an upper examination position. This dynamic mechanism enables proper positioning of the specimen for examination while maintaining a compact overall device structure that is relatively simple to manufacture.
Solution Approach 2:
The specimen slide elevation mechanism is integrated within the compact cartridge housing, with components nested efficiently within the limited space. The mechanical elements for slide elevation are contained within the cartridge structure, allowing for quality examination positioning without significantly increasing external device dimensions or manufacturing complexity.
3Productivity
If reusable assay devices are designed, then cost efficiency is improved, but reliability decreases due to reuse detection difficulties
Solution Approach 1:
The assay device incorporates a reuse detection mechanism that provides feedback on whether the device has been previously used. This feedback system ensures that only new, reliable devices are used for diagnostic purposes, maintaining diagnostic accuracy while allowing for cost-efficient single-use disposal of the cartridge after one examination.
Data Source
AI summary
Assay systems including assay apparatus and handheld assay devices for use therewith for obtaining diagnostic information of a bodily specimen. Assay devices include a cartridge housing snugly accommodating a specimen slide intended for elevation from an initial lowermost specimen introduction position to a final uppermost specimen examination position in which a bodily specimen is compressed between a cartridge housing top face and a specimen slide. Assay devices preferably include a liquid reagent dispensing arrangement for dispensing liquid reagent on a specimen slide for reacting with a bodily specimen.