Ostomy Pouch Filter With Protrusions And Superabsorbent Layer
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Solution Overview
Problem
Ostomy pouch filters have a short lifespan due to clogging by waste, leading to ballooning, inadequate deodorization, and leakage, reducing the wear time of the pouch.
Innovation Solution
The design of ostomy pouches with a filter system that includes a center panel with protrusions projecting towards the front panel, creating a tortuous path for waste while allowing gas to pass freely, and a single weld attachment at the bottom edge, minimizing direct exposure to waste and enhancing filter longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter system is incorporated in the ostomy pouch to vent gas, then gas management and odor removal are improved, but the filter becomes clogged by accumulated waste, reducing filter lifespan
Solution Approach 1:
The filter system is segmented into multiple functional zones: a hydrophobic filter media for gas filtration, a superabsorbent polymer layer for waste absorption, and a barrier layer. This segmentation allows each component to perform its specific function independently, preventing waste from reaching and clogging the hydrophobic filter media while maintaining gas venting capability.
Solution Approach 2:
A superabsorbent polymer layer is introduced as an intermediary between the waste collection pouch and the hydrophobic filter media. This intermediary absorbs and traps waste materials, preventing direct contact with the filter pores, while still allowing gas molecules to pass through to the hydrophobic filter for deodorization.
2Productivity
If the filter is exposed directly to waste in the pouch, then gas can be vented freely, but waste accumulates and clogs the filter, reducing wear time
Solution Approach 1:
The superabsorbent polymer layer performs preliminary action by absorbing and trapping waste materials before they can reach the hydrophobic filter media. This preliminary waste capture maintains clear filter pores throughout the wear time, ensuring continuous gas venting efficiency without clogging.
Solution Approach 2:
Different regions of the filter system have different properties: the lower portion contains superabsorbent polymer for waste absorption, the middle has a barrier layer, and the upper portion has hydrophobic filter media for gas filtration. This local quality differentiation allows simultaneous waste containment and gas venting without interference.
3Strength
If multiple welds are used to attach panels, then structural integrity is improved, but complexity of manufacturing increases
Solution Approach 1:
Multiple separate welds are merged into a single continuous weld line that attaches the front panel to the rear panel along the periphery. This single weld configuration maintains structural integrity by creating a continuous seal while significantly reducing manufacturing complexity and weld inspection requirements.
Solution Approach 2:
The single peripheral weld serves multiple functions: it provides structural strength, creates an air-tight seal, and simplifies manufacturing. This multi-functional approach eliminates the need for multiple specialized welds, reducing overall manufacturing complexity while maintaining or improving structural integrity.
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 solution significantly extends the filter life by preventing clogging and maintaining effective deodorization, as demonstrated by test results showing a 33% to 150% longer filter life compared to commercial products.
Implementation Method 1
a hydrophobic filter media, positioned above the stomal opening, that allows passage of gas, but not liquid, therethrough
Implementation Method 2
a superabsorbent polymer, positioned below the hydrophobic filter media, that absorbs and traps liquid waste
Data Source
AI summary
Ostomy appliances with a filter system that is resistant to clogging by waste expelled by the stoma are provided for waste management.