IV Filter Disk Valve Priming Channel Design
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Solution Overview
Problem
Conventional intravenous filters require significant time for priming, which can delay medical procedures, and may become clogged, reducing filtration efficiency and filter life.
Innovation Solution
An intravenous filter design with a priming channel and a disk valve that allows for rapid priming by bypassing the filter media, and a filter channel that captures particulates, enabling efficient filtration during normal operation while extending the life of the filter media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flow is directed through the filter media during priming, then filtration is provided, but priming time is significantly extended
Solution Approach 1:
The filter housing is segmented into multiple flow paths: a priming channel that bypasses the filter media and a filter channel that passes through the filter media. The disk valve segments the flow distribution, directing fluid exclusively through the priming channel during priming operations and through the filter channel during normal operation. This segmentation allows rapid priming without compromising filtration capability when needed.
Solution Approach 2:
The priming channel acts as an intermediary flow path that allows fluid to bypass the filter media during priming operations. This intermediary channel provides a shortcut for priming fluid while the filter media remains intact for capturing particulates during normal operation, thus resolving the conflict between rapid priming and filtration efficiency.
2Reliability
If flow is directed through the filter media continuously, then filtration is maintained, but filter media becomes clogged reducing filter life
Solution Approach 1:
The system dynamically switches between two operational modes using the disk valve: a priming mode where fluid bypasses the filter media through the priming channel, and a filtration mode where fluid passes through the filter channel and filter media. This dynamic operation allows the filter media to rest from continuous filtration stress during priming operations, extending its service life while maintaining filtration capability when activated.
Solution Approach 2:
The priming channel provides a preliminary flow path that allows the system to be primed without subjecting the filter media to unnecessary filtration stress. By performing the priming action through the bypass channel before normal operation begins, the filter media is protected from premature clogging while ensuring the system is properly primed for efficient operation.
3Loss of time
If a bypass channel is added for priming, then priming time is reduced, but device complexity increases
Solution Approach 1:
The priming channel and filter channel are merged within a single filter housing structure, sharing common inlet and outlet ports. The disk valve is integrated into the housing to control flow distribution between the two channels. This merging approach provides the functionality of a bypass system for rapid priming while minimizing the increase in device complexity through shared components and integrated design.
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 design allows for rapid priming and extended filter media life, reducing procedural delays and maintaining filtration efficiency by directing flow through a priming channel during initial priming and through a filter channel during normal operation.
Implementation Method 1
a filter media disposed within the filter housing... the filter media permits flow from the filter channel to the outlet and captures particulate from the flow
Implementation Method 2
a disk valve coupled to the filter housing, wherein the disk valve is moveable to direct flow from the inlet to the priming channel in a first position and to direct flow from the inlet to the filter channel in a second position
Data Source
AI summary
IV filters are described herein. An IV filter includes a filter housing, a filter media, a filter channel, a priming channel, and a disk valve. The filter housing defines an inlet and an outlet. The filter media is disposed within the filter housing. The filter channel is disposed within the filter housing. The filter channel is in fluid communication with the inlet and the filter media, and the filter media permits flow from the filter channel to the outlet and captures particulate from the flow. The priming channel is disposed within the filter housing. The priming channel is in fluid communication with the inlet and the outlet. The disk valve is coupled to the filter housing. The disk valve is moveable to direct flow from the inlet to the priming channel in a first position and to direct flow from the inlet to the filter channel in a second position.