Liquid Sample Testing Device With Controlled Detection Chamber
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Solution Overview
Problem
Existing testing devices for liquid samples, particularly urine, are limited in their ability to perform multiple tests simultaneously and safely, often requiring manual operation that can be unsafe and unsanitary, and struggle with ensuring consistent reaction times across different testing areas.
Innovation Solution
A device with a non-absorbent support carrier that allows testing elements with spaced absorbent areas to directly contact the liquid sample for a specified time, followed by immediate separation, using chemical reactions to generate color changes for analysis, and includes a detection chamber with fluid communication for sample distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the reagent strip is put directly into the liquid sample, then the reagent strip can obtain the liquid sample, but the bottom of the reagent strip is in contact with the liquid sample which may cause contamination and unsafe manual operation
Solution Approach 1:
The patent introduces a detection chamber as an intermediary component between the liquid sample and the reagent strip. The detection chamber receives the liquid sample and controls its contact with the reagent strip through a controlled opening, preventing direct contact between the liquid sample and the bottom of the reagent strip while still allowing the testing area to obtain the liquid sample for accurate detection.
2Adaptability or versatility
If multiple testing areas are provided on the reagent strip, then multiple analytes can be tested simultaneously, but it is difficult to ensure consistent reaction times in each testing area
Solution Approach 1:
The detection chamber serves as a universal platform that accommodates multiple testing areas on the reagent strip and provides consistent liquid sample delivery to each area through controlled fluid communication. This ensures that all testing areas receive the liquid sample simultaneously and for the same duration, guaranteeing consistent reaction times while enabling simultaneous testing of multiple analytes.
3Quantity of substance
If the liquid sample contacts the testing area for a long time, then the testing area can absorb sufficient liquid, but false negative results may occur due to prolonged contact
Solution Approach 1:
The patent employs dynamic control of liquid sample contact time through the detection chamber's opening mechanism. The liquid sample is allowed to contact the testing area for a precisely controlled duration, then the opening is closed to stop contact. This dynamic control ensures sufficient liquid absorption for accurate detection while preventing prolonged contact that could cause false negative results.
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 simultaneous testing of multiple analytes with improved safety and hygiene by ensuring consistent reaction times and preventing false negative results due to prolonged liquid contact.
Implementation Method 1
the testing area includes an absorbent material... the testing area can be moistened only by direct contact with the liquid sample
Implementation Method 2
substances in the testing area, for examples, chemical substances, react with the analyte in the liquid sample. In a reaction process, the testing area presents color
Data Source
AI summary
The invention discloses a device for testing an analyte in a liquid sample, and the device includes: a sample chamber for receiving the liquid sample, where the sample chamber includes an opening and side walls enclosing a chamber; a detection chamber, where the detection chamber is in fluid communication with the sample chamber, the detection chamber is provided with the opening through which a testing element is inserted into the detection chamber, and the testing element has a testing area; and a first cover, where the first cover is used for sealing the opening of the detection chamber. The device can be used for testing the analyte in the liquid sample and especially suitable for home self-testing.