Sample Extraction Tube for Equipment-Free Nucleic Acid Detection
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Solution Overview
Problem
Conventional methods for nucleic acid detection require isolation or purification of nucleic acids from biological samples, necessitating specialized equipment and processes, which are cumbersome and not suitable for rapid detection in pandemic situations.
Innovation Solution
A method utilizing a sample extraction tube with a treatment buffer that stabilizes nucleic acids, allowing direct detection without isolation or purification, using a flexible plastic tube with a dropper cap, and a heating step to release nucleic acids into a reaction vessel for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods using centrifuges or magnetic beads are used to isolate nucleic acids, then nucleic acid detection accuracy is improved, but device complexity and operation difficulty increase
Solution Approach 1:
The patent extracts and eliminates the need for specialized isolation equipment (centrifuges, magnetic beads) by using a simple manual extraction tube system that performs nucleic acid isolation through straightforward manual steps, thereby reducing device complexity while maintaining detection capability
Solution Approach 2:
The patent employs disposable extraction tubes that contain all necessary reagents and perform the isolation function in a single-use format, eliminating the need for expensive, complex, and reusable specialized equipment while maintaining effective nucleic acid extraction
2Reliability
If conventional PCR techniques with specialized equipment are used, then nucleic acid detection reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The extraction tube system is designed to perform nucleic acid isolation and preparation functions automatically through its built-in reagents and manual steps, eliminating the need for operator intervention with complex equipment and specialized training while maintaining reliable detection
Solution Approach 2:
The patent divides the complex PCR process into separate functional modules: the extraction tube handles sample preparation and nucleic acid isolation, while the PCR reagents handle amplification, allowing each component to be optimized and operated independently without requiring specialized skills
3Ease of operation
If manual extraction tube manipulation is used, then ease of operation is improved, but nucleic acid recovery efficiency deteriorates
Solution Approach 1:
The patent optimizes parameters such as tube volume, reagent concentrations, and heating conditions to ensure that manual manipulation yields sufficient nucleic acid recovery efficiency, balancing ease of operation with productive outcomes through careful parameter selection
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 and efficient nucleic acid detection from biological samples without specialized equipment, facilitating quick identification of pathogens like SARS-COV2 and hereditary genetic conditions, using real-time PCR and isothermal amplification techniques.
Implementation Method 1
a treatment buffer configured for stabilizing the nucleic acids of the collected biological sample
Implementation Method 2
heating the collected biological sample transferred to the sample extraction tube from 2 to 10 minutes at from 80 to 95 degrees Celsius
Data Source
AI summary
A method of detection of nucleic acids from a biological sample (molecular diagnostics) using a sample extraction tube without isolation or purification of the nucleic acids or the use of specialized equipment in the preparation of the biological sample is described. The method may include direct detection of nucleic acids from a biological sample without isolating or purifying nucleic acids (i.e. without isolation or purification of nucleic acids from other cellular components through centrifuges or magnetic beads) prior to analysis or the use of specialized equipment in the sample preparation and the PCR amplification (i.e. pipettes, PCR cartridges, or centrifuges).