Ostomy Appliance Multi-Cavity Gas Venting
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Solution Overview
Problem
Existing ostomy appliances face challenges in effectively managing gas flow and liquid containment, leading to odor issues and inefficient waste collection, particularly in drainable and non-drainable designs.
Innovation Solution
The ostomy appliance features a configuration with interconnected walls that create multiple cavities for waste collection and gas flow paths, utilizing slits and apertures with gas filters to allow gas escape while preventing liquid backflow, and liquid flow paths acting as one-way valves to ensure efficient waste management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If gas flow paths with filters are provided to allow gas escape, then odor control is improved, but device complexity increases due to multiple walls and cavities
Solution Approach 1:
The ostomy appliance is divided into multiple cavities (first cavity between first and second walls, second cavity between third and fourth walls) separated by partition walls. Gas flow paths with filters are provided in each wall to allow controlled gas escape at different stages, enabling progressive odor management while maintaining containment
Solution Approach 2:
Filter elements are introduced as intermediary components within the gas flow paths in the first, second, third, and fourth walls. These filters act as mediators that allow gas molecules to pass through while trapping odor-causing substances, enabling odor control without completely blocking gas flow
2Productivity
If liquid flow paths are provided to prevent liquid backflow, then waste collection efficiency is improved, but device complexity increases
Solution Approach 1:
The appliance is segmented into multiple cavities with partition walls between them. Liquid flow paths are provided in the partition walls to enable controlled liquid movement from the second cavity to the first cavity, preventing backflow while maintaining efficient waste collection through gravitational drainage
Solution Approach 2:
Liquid flow paths are designed to utilize gravitational force and pressure differential to control liquid movement. The paths allow liquid to flow from the second cavity to the first cavity under gravity while preventing reverse flow, eliminating the need for mechanical valves
3Object-affected harmful factors
If multiple cavities are created to manage gas and liquid separately, then odor control is improved, but manufacturing complexity increases
Solution Approach 1:
The ostomy appliance is constructed with multiple walls (first, second, third, fourth walls) that define separate cavities. This segmentation allows independent management of gas and liquid flow paths, enabling effective odor control while maintaining a modular structure that can be manufactured using standard forming and joining techniques
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
This design enhances odor control and waste collection efficiency by allowing gas escape while maintaining liquid containment, reducing the likelihood of liquid backflow and improving user comfort through effective gas and liquid flow management.
Implementation Method 1
the barrier member including a portion which is permeable to waste gases but impermeable to liquid waste
Implementation Method 2
a liquid flow path which acts as a one-way valve to prevent liquid backflow
Data Source
Figure 1
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Figure 3
AI summary
An ostomy appliance having first and fourth walls connected to each other at or near their peripheries, the first wall having a stoma-receiving opening; second and third walls positioned in between the first and fourth walls, the second wall being connected to one or more of the first, third and/or fourth walls, and the third wall being connected to one or more of the first, second and/or fourth walls; a waste collecting cavity defined between either the first and second walls or first and fourth walls; a second cavity defined between the second and third walls; a third cavity defined between the third and fourth walls; a first gas flow path in the second wall to permit waste gases to pass from the waste collecting cavity to the second cavity; a second gas flow path in the third wall to permit waste gases to pass from the second cavity to the third cavity; and a third gas flow path in the fourth wall to permit waste gases to escape from the third cavity, wherein the second and third walls are connected to each other so as to define a liquid flow path which permits liquid within the second cavity to flow into the waste collecting cavity.