Modular DNA Analysis System for Field Portability
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Solution Overview
Problem
Current DNA profiling systems are bulky, difficult to transport, expensive, and time-consuming, making them impractical for field use, such as on a battlefield, where rapid and portable genetic identification is essential.
Innovation Solution
An integrated and automated sample-to-answer system that extracts, amplifies, and analyzes DNA within two hours, using a compact design with modular components, including an analyte preparation module and a detection and analysis module, capable of performing nucleic acid extraction, amplification, and capillary electrophoresis, and compatible with remote operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current DNA profiling systems are used, then accurate genetic identification can be achieved, but the systems are bulky and difficult to transport
Solution Approach 1:
The DNA profiling system is divided into modular components including a sample processing module, amplification module, and detection module that can be independently configured. This segmentation allows the system to be broken down into transportable units while maintaining full functionality, resolving the contradiction between accuracy and portability.
Solution Approach 2:
The patent implements a nested structure where smaller functional modules are integrated within larger system components. For example, the sample processing module is contained within the main system housing, and reagent cartridges are nested within the processing module. This nesting reduces overall system footprint and facilitates transport while preserving measurement precision.
2Measurement precision
If current DNA profiling systems are used, then genetic profiles can be obtained, but processing takes one to two days
Solution Approach 1:
The system implements continuous processing where sample preparation, amplification, and detection occur in an uninterrupted sequence without manual intervention between steps. The automated fluid handling system maintains continuous flow of reagents and samples through the modules, eliminating idle time and reducing total processing time from days to hours while maintaining accuracy.
Solution Approach 2:
Reagents are pre-loaded into cartridges and samples are pre-prepared before insertion into the system. The system performs preliminary setup and calibration automatically upon startup, eliminating time-consuming manual preparation steps and enabling rapid processing while ensuring consistent accurate results.
3Reliability
If current DNA profiling systems are used, then reliable DNA analysis can be performed, but the systems are expensive to use and maintain
Solution Approach 1:
The system uses disposable cartridges containing reagents and consumable components that are replaced rather than maintained. This eliminates expensive maintenance requirements while ensuring consistent reliable performance. The cartridges are manufactured at low cost using standard techniques, making the overall system affordable while maintaining DNA analysis reliability.
4Measurement precision
If current DNA profiling systems are used, then accurate results can be obtained, but substantial user skill and intervention are required
Solution Approach 1:
The system performs self-calibration, self-diagnosis, and self-correction of errors automatically. The integrated control system monitors all parameters and adjusts conditions to maintain optimal performance without user intervention. This self-service capability enables accurate genetic profiling by users with minimal training, resolving the contradiction between accuracy and ease of operation.
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, portable, and cost-effective genetic profiling, reducing processing time from days to under two hours, allowing for on-the-go DNA analysis with minimal user intervention, suitable for field applications.
Implementation Method 1
extraction and isolation of nucleic acid
Implementation Method 2
amplification of nucleotide sequences at selected loci
Implementation Method 3
detection and analysis of amplification product
Data Source
AI summary
A system for controlling custody of a sample can include a cartridge comprising a sample receptacle configured to receive an article configured to deliver a sample to the cartridge, a cartridge module having a cartridge receptacle configured to receive the cartridge; a housing enclosing the cartridge module and the cartridge. The housing can include a closable door; at least one sensor configured to produce a signal indicating: insertion or removal of an article into or from the sample receptacle; whether the cartridge is inserted into the cartridge receptacle; or whether the door is open or closed. The system can further include a computer programmed to record a signal from the at least one sensor for a recording period of time and to display a signal history to a user.