Blood Filtering Device With Segmented Volumes
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Solution Overview
Problem
Existing blood filtering devices in extracorporeal circuits are ineffective in separating and filtering intracavitary and extracavitary blood due to their design, which mixes blood with different properties before filtration, leading to contamination and reduced filtration efficiency.
Innovation Solution
A blood filtering device with separate filtering elements and volumes for intracavitary and extracavitary blood, along with separation means and conveying elements to prevent mixing, allowing for individual filtration and improved blood quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If intracavitary and extracavitary blood are mixed before filtration in a single filtering element, then the device structure is simple, but the filtration efficiency is reduced due to activation and contamination of intracavitary blood
Solution Approach 1:
The filtering device is divided into separate filtering elements for intracavitary blood and extracavitary blood. Each filtering element processes its specific blood type independently, preventing contamination and activation issues that occur when blood types are mixed. This segmentation maintains high filtration efficiency for both blood types while removing gaseous and solid emboli effectively.
2Reliability
If separate filtering elements are used for intracavitary and extracavitary blood, then the filtration efficiency is improved, but the device complexity increases
Solution Approach 1:
The device uses multiple filtering elements arranged in parallel, each dedicated to a specific blood type. This segmentation improves filtration efficiency by preventing blood activation and contamination, while the modular design allows for manageable complexity through functional specialization.
Solution Approach 2:
The filtering device is designed to handle multiple blood types (intracavitary and extracavitary) simultaneously through separate filtering elements. Each element is optimized for its specific blood type, allowing the overall device to perform multiple filtration functions effectively without requiring complex switching mechanisms.
3Ease of manufacture
If a single filtering element is used for both blood types, then the device is easier to manufacture, but the blood filtration capacity is reduced due to emboli elimination requirements
Solution Approach 1:
The filtering system is segmented into separate filtering elements for intracavitary and extracavitary blood. This segmentation increases blood filtration capacity by allowing each element to specialize in removing emboli from its specific blood type without the capacity reduction that occurs when a single element must handle both types.
4Ease of operation
If intracavitary and extracavitary blood are filtered together, then the device operation is simpler, but the removal capacity of gaseous micro-emboli is reduced
Solution Approach 1:
The device operates with separate filtering elements for intracavitary and extracavitary blood, each optimized for removing gaseous micro-emboli from its specific blood type. This segmentation maintains high removal capacity for gaseous micro-emboli while keeping the operation straightforward through parallel processing of different blood types.
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 device optimizes filtration by separating and filtering each type of blood effectively, enhancing the quality of the output blood by preventing contamination and improving the removal of gaseous and solid emboli.
Implementation Method 1
a filtering element, defining a closed profile, the internal volume of which is placed in communication with the above-mentioned blood inlet unions and the external volume of which is placed in communication with the outlet mouth of the filtered blood. The blood entering the casing then passes through the filtering element and exits from the outlet mouth.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The blood filtering device (1), comprises a casing (2) defining a containment volume (3) and provided with at least a first inlet (4) for the venous blood, at least a second inlet (5) for the intracavitary blood, at least a third inlet (6) for the extracavitary blood and at least an outlet mouth (7) for the blood; blood filtering means (8, 9, 10) which are housed inside the containment volume (3) and delimiting at least one filtering volume (8a, 9a, 10a) communicating with the blood inlets (4, 5, 6) and at least one collecting volume (11) communicating with the outlet mouth (7); where filtering means (8, 9, 10) comprise: at least a first filtering element (8) defining a closed profile and delimiting a first filtering volume (8a) communicating with the first inlet (4); at least a second filtering element (9) defining a closed profile and delimiting a second filtering volume (9a) communicating with the second inlet (5); at least a third filtering element (10) defining a closed profile and delimiting a third filtering volume (10a) communicating with the third inlet (6); wherein the filtering elements (8, 9, 10) are separated and distinct from each other.