Magnetic Pathogen Isolation from Blood Samples
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting blood-borne pathogens, such as bacteria and fungi, are slow and often require enrichment steps that can compromise test sensitivity and delay diagnosis, leading to potential sepsis and other severe health issues.
Innovation Solution
The use of magnetic particles conjugated with specific binding elements, such as antibodies, to isolate pathogens directly from blood samples without the need for enrichment, allowing for rapid detection at low concentrations through magnetic separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If enrichment steps are used to increase pathogen concentration, then detection sensitivity is improved, but diagnosis time is delayed and cell viability may be compromised
Solution Approach 1:
The patent applies preliminary action by performing magnetic separation of pathogens from blood samples before any enrichment or culture steps. Magnetic particles conjugated with pathogen-specific antibodies are added to the sample, allowing direct isolation and concentration of pathogens without waiting for growth. This preliminary isolation eliminates the need for time-consuming enrichment steps while maintaining detection sensitivity, as the magnetic separation can detect pathogens at very low concentrations directly from the clinical sample.
2Reliability
If multiple incubation steps are performed to isolate target bacteria, then pathogen isolation is improved, but test sensitivity is compromised and time consumption increases
Solution Approach 1:
The patent applies the extraction principle by removing pathogens directly from the complex blood sample matrix using magnetic separation. The magnetic particles with specific antibodies bind to target pathogens, and the magnetic field extracts these bound complexes from the sample. This direct extraction avoids multiple incubation steps that could kill sensitive cells, preserving test sensitivity while achieving reliable pathogen isolation. The method extracts pathogens in a single step rather than requiring sequential incubations.
3Reliability
If traditional culture methods are used for pathogen detection, then pathogen identification is achieved, but the process is expensive and time-consuming
Solution Approach 1:
The patent applies mechanics substitution by replacing the biological culture system with a magnetic separation system. Instead of relying on slow bacterial growth and culture media, the invention uses magnetic particles with specific antibodies to directly bind and isolate pathogens. This mechanical/magnetic approach substitutes the time-consuming biological amplification process with a rapid physical separation method, achieving both reliable identification and high detection speed within minutes rather than days.
4Quantity of substance
If enrichment incubation is performed to increase cell numbers, then detection capability is improved, but some cells are killed and test sensitivity is reduced
Solution Approach 1:
The patent applies the intermediary principle by using magnetic particles as a mediator to concentrate pathogens without requiring incubation. The magnetic particles act as an intermediary carrier that binds to pathogens via specific antibodies and concentrates them through magnetic separation. This intermediary approach achieves the desired increase in effective cell concentration for detection without subjecting the pathogens to incubation conditions that could kill them, thereby maintaining test sensitivity while improving detection capability.
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 early and accurate detection of pathogens at very low levels, reducing the time to diagnosis and improving patient outcomes by providing clinically relevant data for timely treatment decisions.
Implementation Method 1
a magnetic field is applied to capture pathogen/magnetic particle complexes on a surface
Data Source
AI summary
The invention generally relates to methods of using compositions that include sets of magnetic particles, members of each set being conjugated to an antibody specific for a pathogen, and magnets to isolate a pathogen from a body fluid sample.