Reagent Pack Storage for Dual-Mode Molecular Assay Instruments
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Solution Overview
Problem
Existing molecular assays lack the capability to efficiently perform both thermal cycling and isothermal amplification assays in a single automated instrument, limiting the versatility and throughput of nucleic acid analysis.
Innovation Solution
A dual-format molecular diagnostic instrument is enhanced with a second module that supports both thermal cycling and isothermal amplification assays, incorporating chemiluminescent and fluorescent detection technologies, and includes a thermal cycler with reagent storage and pipetting capabilities to automate PCR and other reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single automated instrument is designed to perform only one type of amplification assay, then the instrument structure remains simple, but the versatility and throughput of nucleic acid analysis are limited
Solution Approach 1:
The instrument is designed with a universal platform that can perform both thermal cycling amplification assays (such as PCR) and isothermal amplification assays using the same basic hardware architecture. The system incorporates a multi-mode amplification module that can switch between different amplification methods, enabling a single instrument to handle diverse nucleic acid analysis requirements without requiring separate dedicated instruments for each assay type.
Solution Approach 2:
The instrument incorporates dynamic control mechanisms that allow the amplification module to switch between thermal cycling and isothermal modes based on the specific assay requirements. The system uses programmable temperature control and real-time monitoring capabilities to adapt the thermal profile dynamically, enabling the same physical hardware to execute different amplification protocols without physical reconfiguration.
2Productivity
If the instrument performs both thermal cycling and isothermal amplification assays, then the throughput and versatility improve, but the device complexity increases
Solution Approach 1:
The instrument merges the thermal cycling and isothermal amplification capabilities into a single integrated module, combining the benefits of both methods in one system. The design consolidates reagent delivery, temperature control, and detection systems to work with both amplification types, thereby increasing throughput by eliminating the need for instrument switching while managing complexity through unified architectural design.
Solution Approach 2:
The instrument is divided into modular components where the amplification module can be independently configured for different assay types. The system uses separate but compatible reagent delivery subsystems and detection channels that can operate independently or in combination, allowing the instrument to handle multiple assay types simultaneously or sequentially without requiring complete system redesign for each function.
3Loss of time
If real-time monitoring and analysis are integrated into the instrument, then the sample-to-answer capability improves, but the device complexity increases
Solution Approach 1:
The instrument implements continuous real-time monitoring of the amplification process through integrated optical detection systems that operate throughout the entire reaction. The system performs uninterrupted monitoring of fluorescence or other signals, enabling real-time data collection without requiring manual intervention or separate analysis steps. This continuous action accelerates the sample-to-answer time by providing immediate results while the amplification reaction progresses.
Solution Approach 2:
The instrument incorporates real-time feedback mechanisms where the detection system continuously monitors the amplification reaction and provides immediate data to the control system. The system uses this feedback to monitor reaction progress, detect endpoint conditions, and even adjust reaction parameters dynamically. This integrated feedback loop eliminates delays between sample input and result analysis, significantly reducing sample-to-answer time while managing complexity through automated control algorithms.
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 enhanced system enables simultaneous performance of PCR and isothermal amplification assays, achieving high throughput and sample-to-answer capabilities with integrated real-time monitoring and analysis.
Implementation Method 1
heating the contents of a capped vial containing a reaction mixture
Implementation Method 2
measuring an optical signal from the contents of the vial
Data Source
AI summary
A method for analyzing samples is performed within a housing. Each sample is contacted in a separate receptacle with a magnetically-responsive solid support for binding and immobilizing a nucleic acid of interest that may be present in one or more of the samples. Each sample is processed to isolate and purify any nucleic acid of interest that is present. An elution buffer is provided to each separate receptacle, thereby forming an eluate containing the nucleic acid of interest, if present in the associated sample. A unit-dose reagent for performing a nucleic acid amplification reaction is reconstituted for each sample, and the reconstituted reagent is combined with the eluate in one of a plurality of processing vials. Each of the processing vials containing reconstituted reagent and eluate is closed with a cap and transferred to an incubator and the contents are subjected to nucleic acid amplification conditions.