Magnetic Particle Assays for Multiplex Analyte Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multiplex assays face challenges in analyzing analytes with significantly different concentrations, as protocols for detecting abundant and rare analytes conflict, leading to inaccurate results due to uneven particle distribution on imaging planes.
Innovation Solution
The use of particle populations with distinct concentrations and magnetic material distributions allows for preferential capture and analysis of particles with lower concentrations, employing a magnetic field to adjust the ratio of particles on the imaging plane, enabling simultaneous analysis of analytes with different detectable ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If widely different concentrations of particles are employed among different particle subsets to enable different detectable ranges for each analyte, then the detectable concentration range for each analyte is improved, but the statistical significance of lower concentration particle subsets is reduced
Solution Approach 1:
The patent applies parameter changes by varying the magnetic material concentration in particles across different subsets. Each particle subset contains particles with distinct magnetic material concentrations, allowing differential magnetic capture. This enables the system to adjust the effective concentration of each particle subset on the imaging plane independently, resolving the contradiction between detectable range and statistical significance.
Solution Approach 2:
The patent introduces magnetic material as an intermediary mechanism to control particle distribution. By using magnetic fields to selectively capture particles based on their magnetic material content, the system mediates between the desired detectable concentration ranges and the need for sufficient statistical representation of each particle subset.
2Measurement precision
If particle subsets with different concentrations are used to accommodate different analyte abundances, then the accuracy for detecting both abundant and rare analytes is improved, but the uniformity of particle distribution on the imaging plane is reduced
Solution Approach 1:
The patent applies local quality by giving different magnetic material concentrations to different particle subsets. This creates local differences in magnetic properties that allow each particle subset to be independently controlled during the magnetic capture process, enabling non-uniform distribution that optimizes detection accuracy for each analyte.
Solution Approach 2:
The patent changes the magnetic material concentration parameter across particle subsets to achieve differential capture efficiency. This parameter variation allows the system to optimize the number of particles from each subset on the imaging plane, improving detection accuracy while accepting controlled non-uniformity in distribution.
3Ease of manufacture
If the same number of particles are used for each particle subset, then the simplicity of assay design is maintained, but the ability to detect analytes with different concentrations accurately is reduced
Solution Approach 1:
The patent introduces parameter changes in magnetic material concentration as a straightforward modification to particle manufacturing. This approach maintains relative simplicity in assay design while significantly improving detection accuracy for analytes with different concentrations, as the magnetic differentiation can be achieved during standard particle production processes.
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
This approach ensures statistically significant data for all analytes, improving the accuracy and comprehensiveness of multiplex assays by adjusting particle ratios and magnetic material concentrations, allowing for precise detection and quantification of both abundant and rare analytes.
Implementation Method 1
generating a magnetic field in proximity to the imaging plane that is sufficient to attract and immobilize a ratio of particles from at least two discrete particle sets
Implementation Method 2
each particle within the first particle set includes a greater amount of magnetic material than each particle within the second particle set
Data Source
AI summary
Particle populations and assays are provided which have varying amounts of magnetic material and varying particle concentrations among different subsets of particles. In particular, the particle populations and assays include at least two particle sets with distinct sums of particles which are inversely related to the magnetic material concentration comprising each of the particles within the two particle sets, respectively. A method for processing an assay having such particle sets includes routing the assay in proximity to an imaging plane within a static imaging optical analysis system and generating a magnetic field in proximity to the imaging plane. The magnetic field is sufficient to attract and immobilize a ratio of particles from the at least two discrete particle sets that is different from the ratio of particles comprising the at least two discrete particle sets in the assay as the assay is introduced into the static imaging optical analysis system.