Self-Contained Assay Pouches for Rapid Nucleic Acid Diagnosis

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Solution Overview

Problem

Traditional microbiology techniques for diagnosing pathogens are time-consuming, often taking days or weeks, which can delay proper treatment. Additionally, PCR methods face challenges with low levels of pathogens in samples and the need for large panels of assays, making them impractical for rapid diagnosis.

Innovation Solution

The development of self-contained reaction vessels, referred to as 'pouches' or 'cards,' which include integrated sample preparation zones, nucleic acid amplification zones, and analysis zones. These vessels are designed for rapid amplification of nucleic acids and can be used with minimal user input, featuring flexible and rigid portions for efficient sample processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If traditional microbiology techniques are used for diagnosing pathogens, then diagnosis can be performed, but the process takes days or weeks which delays proper treatment

Engineering Contradiction:

Improvediagnosis timeVSAvoidtreatment speed

Core Design Contradiction:

Loss of timeVSProductivity

Solution Approach 1:

The patent incorporates sample preparation zones and reagent packs that perform preliminary actions (sample lysis, nucleic acid extraction, amplification) before the actual diagnosis is needed. The self-contained pouches are pre-loaded with all necessary reagents and components, enabling rapid processing from sample receipt to diagnosis without requiring time-consuming manual preparation steps.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces traditional mechanical microbiology techniques (culture-based methods requiring incubation) with molecular biology techniques (PCR-based amplification). This substitution enables detection of pathogens at the nucleic acid level, dramatically reducing diagnosis time from days/weeks to hours while maintaining sensitivity and specificity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If PCR methods are used to detect pathogens at low levels, then sensitivity is improved, but the need for large panels of assays and large sample volumes makes it impractical

Engineering Contradiction:

Improvepathogen detection sensitivityVSAvoidassay panel complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges multiple PCR assays into a single multiplexed reaction within one self-contained pouch. By combining detection for multiple pathogens and incorporating sample preparation, amplification, and detection functions into a single integrated system, the patent reduces the complexity of running multiple separate assays while maintaining the sensitivity to detect low-level pathogens.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The self-contained pouches are designed as universal platforms that can accommodate various pathogen detection assays within a single device. The standardized pouch format with integrated sample preparation and amplification zones allows one device to perform multiple diagnostic functions, eliminating the need for separate assay panels for different pathogens.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If multiplex PCR is used to assay multiple targets concurrently, then the number of reactions is reduced, but robustness of high level multiplex reactions and clear analysis of multiple products becomes difficult

Engineering Contradiction:

Improvenumber of reactions per batchVSAvoidmultiplex reaction robustness

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the amplification process into distinct zones within the self-contained pouch, with separate reaction chambers for different pathogen detections. This physical segmentation allows multiple multiplex reactions to occur concurrently while maintaining reaction robustness through isolated conditions, and enables clear analysis of multiple products by spatial separation of amplification zones.

Inventive Principle:

Principle #1Segmentation

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 described system enables rapid and efficient nucleic acid amplification and analysis, reducing the time required for diagnosis and improving the ability to detect pathogens present in low concentrations within samples.

Implementation Method 1

an integrated sample preparation (ISP) zone upstream of the first-stage chamber that is configured to receive a variety of sample types and prepare the sample for analysis

Methodology Applied

Scientific EffectCell lysis:

Implementation Method 2

prepare the sample for analysis in the pouch with little or no input from the user

Methodology Applied

Scientific EffectNucleic acid extraction:

Implementation Method 3

the polymerase chain reaction (PCR) has become a method of choice for rapid diagnosis of infectious agents

Methodology Applied

Scientific EffectPolymerase chain reaction:

Implementation Method 4

rapid amplification of nucleic acids

Methodology Applied

Scientific EffectNucleic acid amplification:

Implementation Method 5

Nesting secondary reactions within the primary product increases robustness

Methodology Applied

Scientific EffectNested PCR:

Data Source

PatentUS20250121376A1Assay devices and methods of use thereof

Publication Date: 2025.04.17 BIOFIRE DEFENSE LLC

AI summary

Systems, methods, and apparatuses are provided for self-contained nucleic acid preparation, amplification, and analysis.