Point-of-Care Cancer Screening Test Strip Using Galactose Oxidase
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Solution Overview
Problem
Current cancer screening methods for precancerous conditions in healthy individuals are lengthy, prone to false negatives, and require specialized diagnostic laboratories, limiting their effectiveness as a general population screening tool.
Innovation Solution
A rapid screening test using a kit with a test strip or membrane pre-embedded with galactose oxidase and Schiff's Reagent, which oxidizes marker carbohydrates in mucus or body fluids, allowing for accurate detection of cancerous and precancerous conditions without initial contact between the reagents, facilitating point-of-care testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the traditional multi-step screening procedure is used, then the detection accuracy is improved, but the testing time and complexity increase significantly
Solution Approach 1:
The patent combines multiple reagents (galactose oxidase and Schiff's reagent) and multiple procedural steps into a single integrated test strip. The test strip simultaneously performs carbohydrate oxidation, color development, and result visualization, reducing the multi-step laboratory procedure into a single point-of-care test that maintains detection accuracy while dramatically reducing testing time and complexity.
Solution Approach 2:
The patent segments the testing system into distinct functional zones on the test strip, with galactose oxidase positioned in a first zone and Schiff's reagent in a second zone. This spatial segmentation allows each reagent to perform its specific function at the appropriate location, enabling rapid sequential reactions without requiring multiple separate handling steps, thus reducing time loss while maintaining precision.
2Reliability
If the traditional laboratory-based screening method is used, then the detection reliability is improved, but the device complexity and infrastructure requirements increase
Solution Approach 1:
The test strip is designed to be self-contained and self-operating, with all necessary reagents (galactose oxidase and Schiff's reagent) pre-loaded in their respective zones. The strip automatically performs the chemical reactions when exposed to the sample, eliminating the need for complex laboratory equipment, specialized infrastructure, or highly trained personnel, while maintaining reliable detection through optimized reagent positioning and reaction conditions.
Solution Approach 2:
The patent optimizes the physical and chemical parameters of the reagents and their positioning on the test strip to ensure reliable detection under simple conditions. By adjusting factors such as reagent concentration, zone dimensions, and spatial arrangement, the system achieves laboratory-grade reliability in a point-of-care format without requiring complex infrastructure.
3Productivity
If multiple reagents are initially mixed together, then the reaction efficiency is improved, but the reagent stability and false positive rates increase
Solution Approach 1:
The patent divides the test strip into distinct zones with galactose oxidase in a first zone and Schiff's reagent in a second zone, preventing premature mixing of reagents. This spatial segmentation maintains reagent stability and prevents false negatives during storage and handling, while ensuring efficient sequential reactions when the sample is applied, as the reagents are activated in a controlled sequence rather than being pre-mixed.
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 method provides rapid, accurate, and reliable detection of cancerous and precancerous conditions with minimal handling procedures, reducing false negatives and enabling mass testing programs without the need for specialized laboratories, thus improving early detection and reducing healthcare costs.
Implementation Method 1
oxidizing marker carbohydrates in the mucus or body fluid that contains marker carbohydrates by reacting with galactose oxidase
Implementation Method 2
contacting the oxidized mucus or body fluid with a Schiff reagent
Data Source
AI summary
This disclosure relates to a screening test method, device, and kit for carbohydrates found in a biological sample and associated conditions including, cancerous and precancerous conditions. Specifically, the method tests abnormal carbohydrates in a biological sample using reagents of galactose oxidase, and Schiff's Reagent. The screening test method, device, and kit provides expanded testing capabilities across a range of known conditions and in an otherwise healthy population. This disclosure further relates to the use of the device or kit for an initial evaluation for cancerous and precancerous conditions in people without obvious signs and symptoms, and cancer recurrence in at point-of-care facility or at home.