Lateral Flow Saliva Test Strip for Precision Testosterone Quantification
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Solution Overview
Problem
Current testosterone testing methods are complex, costly, and require laboratory settings, making them inefficient and inaccessible for instant, accurate, and private measurement of testosterone levels in saliva.
Innovation Solution
A portable lateral flow assay test strip with a simplified, visually verifiable threshold test that uses a competitive affinity chromatography method to quantify testosterone levels in saliva by comparing the intensity of test and control lines, paired with an electronic sensor for precise measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laboratory-based testosterone testing methods are used, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent replaces complex laboratory mechanical testing systems with a biochemical lateral flow assay system. The test uses antibody-antigen binding reactions and capillary action through a nitrocellulose membrane to achieve testosterone detection without requiring complex mechanical laboratory equipment, thereby reducing device complexity while maintaining measurement capability
Solution Approach 2:
The patent changes the measurement parameter from requiring complex laboratory instrumentation to using simple visual color intensity comparison. The test results are determined by comparing the intensity of the test line to the control line, transforming the measurement from a complex instrumental reading to a simple visual parameter that can be assessed without sophisticated equipment
2Measurement precision
If traditional laboratory testing methods are used, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The lateral flow assay is designed to be self-operating through capillary action. The saliva sample automatically flows through the nitrocellulose membrane without requiring pumps, valves, or complex operational steps. The test performs the separation, reaction, and detection functions automatically, making it easy for users to operate while maintaining precision through the built-in control line that self-verifies the test validity
Solution Approach 2:
The test strip is segmented into distinct functional zones (sample application area, test line area with testosterone antibodies, control line area with IgG antibodies, and absorbent area). This segmentation allows each zone to perform its specific function independently, simplifying the overall operation while ensuring precise measurement through the distributed functional elements
3Measurement precision
If traditional laboratory testing methods are used, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The lateral flow assay rapidly moves the saliva sample through the nitrocellulose membrane using capillary action, skipping the lengthy sample preparation, centrifugation, and incubation steps required in traditional laboratory methods. The test completes the entire measurement process in minutes by rushing the sample through the reaction zones without delays, achieving both speed and precision
Solution Approach 2:
The test strip is pre-prepared with immobilized antibodies and reagents in specific zones before use. The nitrocellulose membrane is pre-coated with testosterone antibodies in the test line area and IgG antibodies in the control line area. This preliminary preparation eliminates the need for time-consuming setup steps during actual testing, allowing immediate analysis while maintaining precision through pre-positioned functional elements
4Measurement precision
If traditional laboratory testing methods are used, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent employs disposable lateral flow test strips that are inexpensive to manufacture using simple materials like nitrocellulose membrane, printed antibodies, and basic reagents. Each strip is a low-cost single-use device that eliminates the need for expensive reusable laboratory equipment, making precise testosterone measurement affordable and manufacturable at scale
Solution Approach 2:
The lateral flow test strip is a universal platform that can detect multiple analytes by simply changing the antibody coating. The same basic strip design and manufacturing process can be used for testosterone, other hormones, or various biomarkers, reducing per-unit manufacturing cost through economies of scale and standardized production methods while maintaining measurement precision
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 rapid, accurate, and cost-effective determination of testosterone levels in saliva without laboratory equipment, providing a private and efficient solution for health, athletic, and personal assessments.
Implementation Method 1
The test body has a nitrocellulose membrane separated from the saliva receiving pad by a conjugate pad. The saliva flows to the test area during the initial phases of the test.
Implementation Method 2
The test body has adhered to a test area a testosterone reactive conjugate... The testosterone level in the saliva sample is quantified by comparing a first intensity of the test visual indicator to a second intensity of the control visual indicator
Data Source
AI summary
A lateral flow assay format test that accepts a saliva sample that is reacted with a conjugate to indicate the level of testosterone present in the saliva sample.