Microfluidic Filtering Optical Fiber Probe for Real-Time Liquid Analysis
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Solution Overview
Problem
Current methods for analyzing liquids, such as detecting hemolysis in blood and identifying drugs, are hindered by the need for large sample volumes, time-consuming processes, and interference from particles and cells, which limits their effectiveness for real-time, point-of-care applications.
Innovation Solution
An optical spectroscopy system with a microfluidic filtering chamber integrated into an optical fiber probe that separates particles from the liquid, enabling real-time analysis through absorption spectroscopy without prior sample pre-processing, allowing for instantaneous detection of hemolysis and drug concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional liquid analysis methods are used, then measurement accuracy can be achieved, but the analysis time is excessive and real-time detection is not possible
Solution Approach 1:
The patent extracts and removes particles and cells from the liquid sample using a microfluidic filtering chamber, separating the interfering components from the analyte. This extraction of harmful elements enables rapid spectroscopic analysis without the time-consuming preprocessing required by traditional methods, achieving both measurement accuracy and real-time detection capability
Solution Approach 2:
The system performs preliminary filtration of particles and cells before the actual spectroscopic measurement. By preparing the sample in advance through automated microfluidic filtering, the system eliminates the need for manual preprocessing during analysis, enabling immediate real-time detection while maintaining measurement accuracy
2Measurement precision
If traditional drug identification methods are used, then drug concentrations can be detected, but large volumes of analyte are required
Solution Approach 1:
The patent employs a thin microfluidic membrane in the filtering chamber that allows efficient light transmission for spectroscopic analysis while requiring minimal sample volume. The thin film structure enables accurate drug concentration detection through absorption spectroscopy without needing large volumes of analyte, as the optimized optical path and filtering design maximize signal quality from small samples
3Measurement precision
If traditional analysis methods are used, then comprehensive liquid composition analysis can be performed, but particles and cells interfere with measurement accuracy
Solution Approach 1:
The microfluidic filtering chamber actively extracts and removes particles and cells from the liquid sample before spectroscopic analysis. This separation eliminates the interfering components that would otherwise scatter or absorb light and compromise measurement accuracy, enabling precise detection of dissolved analytes including drugs and hemolysis markers
Solution Approach 2:
The microfluidic membrane acts as an intermediary between the liquid sample and the optical detection system. It selectively filters out particles and cells while allowing the liquid analyte to pass through for analysis, mediating the interaction between sample and detector to eliminate interference and preserve measurement accuracy
4Measurement precision
If plasma separation is performed for hemolysis detection, then accurate hemolysis measurement can be achieved, but significant delays are introduced
Solution Approach 1:
The system extracts and removes intact red blood cells from the whole blood sample using the microfluidic filtering chamber, separating them from the plasma containing hemoglobin. This automated extraction eliminates the need for time-consuming manual plasma separation while achieving accurate hemolysis detection by measuring free hemoglobin in the filtered plasma
Solution Approach 2:
The microfluidic device performs preliminary separation of cells from plasma automatically as the sample flows through the filtering chamber. This preliminary action occurs continuously during sample introduction without requiring separate centrifugation or manual processing steps, enabling accurate hemolysis measurement with minimal delay
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, accurate, and reliable analysis of liquids at the point of care, reducing delays in patient diagnosis and treatment, and overcoming limitations of traditional methods by providing noise-free measurements of drug concentrations.
Implementation Method 1
The chamber of the probe can be immersed in a liquid and used to filter out components within the liquid
Implementation Method 2
enabling real-time analysis through absorption spectroscopy
Data Source
AI summary
In one embodiment, an optical spectroscopy probe includes an optical fiber having a distal tip and a microfluidic filtering chamber attached to the distal tip of the optical fiber, the chamber comprising a microfluidic membrane adapted to enable liquid to enter the chamber but prevent particles from entering the chamber.