Portable Centrifuge with Microfluidic Channels for Hematocrit Analysis
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Solution Overview
Problem
In remote or low-resource areas, the lack of infrastructure and economic resources makes it difficult to accurately determine a patient's hematocrit levels, as existing centrifuges require significant capital investment and skilled personnel, and there are challenges in consistent blood sample collection and measurement.
Innovation Solution
A portable centrifuge powered by renewable energy sources, such as solar panels, with a rotor and microfluidic channels, and a diagnosis card with angled indicia for easy hematocrit assessment, allowing for rapid processing of small blood samples and accurate hematocrit evaluation by non-specialized personnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing centrifuges are used for hematocrit analysis, then measurement accuracy is improved, but device complexity and capital investment requirements worsen
Solution Approach 1:
The device is divided into distinct functional modules: a portable centrifuge unit for blood separation, a capillary tube holder for sample containment, and a simplified reading mechanism. This segmentation allows each component to be optimized independently, reducing overall system complexity while maintaining measurement accuracy through specialized function in each segment.
Solution Approach 2:
The invention uses a simplified optical copying or imaging system to capture the hematocrit reading from the capillary tube, replacing complex electronic sensors or specialized imaging equipment. This allows accurate measurement to be achieved through a simpler, more portable system that can be easily deployed in resource-constrained settings.
2Measurement precision
If existing centrifuges are used for hematocrit analysis, then measurement accuracy is improved, but ease of operation worsens due to need for skilled personnel
Solution Approach 1:
The device incorporates automated features including self-contained centrifugal separation that requires minimal user intervention, automatic capillary tube insertion mechanisms, and simplified reading protocols. The system performs the complex separation and measurement functions autonomously, allowing non-specialized personnel to operate it effectively while maintaining accurate hematocrit measurements.
Solution Approach 2:
The device includes pre-configured components such as pre-loaded capillary tubes, pre-calibrated measurement scales, and pre-programmed centrifugal separation parameters. This preliminary preparation eliminates the need for skilled personnel to perform complex setup or calibration procedures, making the device easy to operate while ensuring consistent, accurate results.
3Adaptability or versatility
If renewable power sources are used, then adaptability to remote areas is improved, but power generation capability worsens due to reliance on environmental conditions
Solution Approach 1:
The device incorporates a hybrid power system that can dynamically switch between different power sources and operating modes based on environmental conditions. The centrifuge can operate at reduced speeds with lower power input when renewable energy availability is limited, or perform rapid separation when sufficient power is available. This parameter adjustment allows the device to adapt to varying power conditions while maintaining functional effectiveness in remote deployments.
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 reliable and accurate hematocrit analysis in resource-constrained settings, improving accessibility and reducing the need for specialized equipment and skilled personnel, while ensuring scalability and accuracy across various sample volumes.
Implementation Method 1
separating a sample of blood in a capillary tube into a red blood cell portion and a plasma portion
Data Source
AI summary
A method of evaluating a patient's hematocrit includes collecting a sample of blood in a capillary tube, and placing the capillary tube into a centrifuge having a rotor. The centrifuge has base with a center axis and a manual rotation member. The rotor spins in response to the manual rotation member being pulled by an operator, and the rotor is coupled for rotation to the base. The rotor including a plurality of microfluidic channels. The sample of blood is separated with the centrifuge into a red blood cell portion and a plasma portion in the microfluidic channels. A diagnosis image is provided including a base line indicia, a lower normal line indicia, an upper normal line indicia and a 100 % level line indicia. The capillary tube is placed against the diagnosis image with the bottom end placed adjacent the base line indicia.