Microfluidic Spectroscopy Probe for Particle-Free Liquid Analysis
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Solution Overview
Problem
Current methods for analyzing liquids, such as detecting hemolysis in blood samples and identifying drugs, are time-consuming, require large volumes, and suffer from background interference, making real-time, point-of-care analysis challenging.
Innovation Solution
An optical spectroscopy probe with a microfluidic filtering chamber and optical fiber is developed, which filters out free-floating particles using a chamber with pores that allow fluid entry but block larger particles, enabling real-time absorption spectroscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional liquid analysis methods are used, then measurement precision can be achieved, but analysis time is excessive and requires large volumes of liquid
Solution Approach 1:
The device segments the liquid sample into two paths: one through the microfluidic chamber for optical analysis and another through the filter for particle removal. This segmentation allows simultaneous filtration and spectroscopic analysis, eliminating sequential processing delays and reducing overall analysis time while maintaining detection precision.
Solution Approach 2:
The filter performs preliminary action by removing particles from the liquid sample before the optical analysis occurs. This pre-filtration prevents particle interference during spectroscopy, ensuring measurement precision is maintained while enabling real-time analysis without requiring separate pre-processing steps.
2Measurement precision
If traditional liquid analysis methods are used, then detection accuracy is maintained, but device complexity and sample pre-processing requirements increase
Solution Approach 1:
The device merges the filtration function and spectroscopic analysis function into a single integrated unit. The microfluidic chamber and filter are connected such that liquid flows sequentially through both components without requiring separate devices or complex sample handling procedures, thereby reducing device complexity while maintaining detection accuracy.
Solution Approach 2:
The microfluidic chamber serves multiple functions: it contains the optical path for spectroscopy, houses the filter interface, and provides a controlled environment for liquid analysis. This multi-functionality eliminates the need for separate filtration devices and analysis chambers, reducing overall system complexity while preserving measurement precision.
3Measurement precision
If traditional liquid analysis methods are used, then comprehensive analysis is achieved, but background interference from particles increases
Solution Approach 1:
The filter extracts particles from the liquid sample by allowing only the liquid phase to pass through while retaining solid particles. This extraction removes the source of background interference before the liquid enters the optical analysis chamber, thereby improving signal clarity without compromising the comprehensive analysis of liquid components.
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 real-time, point-of-care analysis of liquids by separating particles from the fluid, improving patient diagnosis and drug identification without prior sample pre-processing, and reducing analysis time and complexity.
Implementation Method 1
The chamber is configured to receive a fluid to be analyzed with the probe and deliver information representing absorption of the fluid by a wavelength of light
Implementation Method 2
at least one of the first and second thin-film layers contains a plurality of pores than allow the fluid to enter the hollow inner space but prevent particles larger than the pores from entering the hollow inner space
Data Source
AI summary
An optical spectroscopy probe including 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 configured to enable liquid to enter the chamber but prevent particles from entering the chamber. Method for fabrication of same.