Optical Lipid Detection in Blood Plasma Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current blood processing systems face challenges in accurately detecting lipids in separated plasma, leading to false hemoglobin alarms and difficulties in quantifying platelets and monitoring the interface between red cells and plasma during centrifugal separation.
Innovation Solution
An optical sensor system using blue and/or ultraviolet light sources and detectors is integrated into the blood processing system to specifically detect lipid content in plasma, differentiating it from hemoglobin and improving the accuracy of plasma analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional hemoglobin detector is used to detect hemoglobin in separated plasma, then hemoglobin detection is achieved, but false alarms occur due to excessive lipids in the plasma
Solution Approach 1:
The detection function is segmented into two separate optical detection systems: one for hemoglobin detection and another for lipid detection. Each detector uses a specific wavelength optimized for its target analyte, allowing independent measurement without cross-interference. This segmentation resolves the contradiction by enabling accurate hemoglobin detection while simultaneously monitoring lipid levels that would otherwise cause false alarms.
Solution Approach 2:
A second optical detector measuring lipid content serves as an intermediary indicator to distinguish true hemoglobin alarms from false alarms caused by lipids. By introducing this intermediary measurement, the system can differentiate between actual hemoglobin presence and lipid-induced optical interference, thereby improving alarm reliability while maintaining hemoglobin detection capability.
2Adaptability or versatility
If conventional optical detection is used in the presence of excessive lipids, then hemoglobin detection is performed, but difficulty arises in distinguishing hemoglobin from lipids
Solution Approach 1:
The system employs parameter changes by using two different wavelengths of light: one wavelength optimized for hemoglobin absorption and another for lipid absorption. By measuring optical density at multiple wavelengths and analyzing the differential absorption characteristics, the system can mathematically distinguish between hemoglobin and lipid contributions, thereby maintaining detection versatility while improving substance differentiation precision.
3Productivity
If plasma with excessive lipids is processed, then plasma collection is achieved, but difficulties arise in quantifying platelets and monitoring the interface between red cells and plasma
Solution Approach 1:
The system implements feedback by continuously monitoring lipid content in the collected plasma and using this information to adjust or alert operators about platelet quantification and interface monitoring accuracy. When high lipid levels are detected, the system can compensate for their interfering effect on platelet counting and interface detection, thereby maintaining productivity while improving measurement precision through real-time corrective feedback.
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 system effectively detects lipid presence, reducing false alarms and enhancing the precision of platelet quantification and interface monitoring, ensuring the quality of separated plasma for therapeutic uses.
Implementation Method 1
a blue and/or ultraviolet light source configured to pass a blue and/or ultraviolet light through plasma in the plasma flow path; a light detector configured to receive at least a portion of the blue and/or ultraviolet light and generate a signal indicative of lipid content in the plasma
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Blood separation systems and methods are provided for detecting lipids in plasma that has been separated from a plasma-containing fluid, such as blood. The system includes a fluid processing region in which a plasma-containing fluid is separated into plasma and other fluid components. A plasma flow path is associated with the fluid processing region for the flow of at least a portion of the separated plasma into or out of the region. A lipid detector shines blue and/or ultraviolet light through the separated plasma in the plasma line to optically detect the presence of lipids therein. The lipid detector may be used alone or in combination with a hemoglobin detector to reduce the number of false hemoglobin alarms or an interface detector for improved detection and correction of the location of an interface between separated fluid components in the fluid processing region.