Ostomy Pouch Intermediate Wall Spot Welding
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Solution Overview
Problem
Existing drainable ostomy pouches face difficulties in cleaning the drainage outlet due to a loose intermediate wall that interferes with the cleaning process and may obstruct the discharge of faecal matter, leading to incomplete emptying and unpleasant odors.
Innovation Solution
The intermediate wall is attached to the distal wall via spot welds near the bottom edge, ensuring it follows the distal wall when the stiffening strips are flexed, preventing interference with cleaning and allowing thorough cleaning of the drainage outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the intermediate wall is left loose and free to move, then the pouch can be easily assembled and manufactured, but the intermediate wall interferes with cleaning the drainage outlet and may obstruct discharge
Solution Approach 1:
The intermediate wall is pre-attached to the distal wall at its bottom edge through spot welds or adhesive spots before the pouch is put into use. This preliminary attachment action ensures that when the stiffening strips are flexed to open the drainage outlet, the intermediate wall follows the distal wall and does not interfere with cleaning operations or obstruct discharge.
2Ease of operation
If the intermediate wall is attached to the distal wall, then cleaning is facilitated, but the structure becomes more complex
Solution Approach 1:
The attachment between the intermediate wall and distal wall is achieved through discrete spot welds or adhesive spots rather than continuous attachment. This segmentation approach provides the necessary fixation to prevent interference with cleaning while maintaining relative structural simplicity and allowing for efficient manufacturing processes.
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
Facilitates easy cleaning of the drainage outlet and interior regions without obstruction, ensuring complete emptying and reducing odor issues by securing the intermediate wall relative to the distal wall, thus enhancing the overall usability and hygiene of the pouch.
Implementation Method 1
The intermediate wall is attached at one or more spot welds or adhesive spots to the distal wall in the vicinity of the bottom edge of the intermediate wall
Implementation Method 2
The intermediate wall is attached at one or more spot welds or adhesive spots to the distal wall in the vicinity of the bottom edge of the intermediate wall
Data Source
Figure 1~2
Figure 3~4
AI summary
A drainable ostomy pouch comprising a proximal wall 1 and a distal wall 2 of flexible sheet material defining a cavity therebetween for receiving human stomal discharge through an aperture in the proximal wall and an elongate drainage portion extending downwards and ending in a drainage outlet 5, and the proximal wall having an aperture for receiving stomal effluents; a proximal and a distal flexible stiffening strip 6,7 located near and extending along the drainage outlet and being attached, for instance by heat sealing or adhesion, to the outer surfaces of the proximal and distal walls, respectively; an intermediate wall 3 of flexible sheet material arranged between the proximal and distal walls for dividing the cavity into two compartments, a proximal faeces compartment 3b and a distal flatus gas compartment 3a, and ending at a transversely extending bottom edge 4 ; and securing means for securing a coil comprising the stiffening strips and the three walls and formed by rotating the strips upwards at least 360 degrees, preferably at least 540 degrees, the intermediate wall 3 being attached by means spot welds 3c to the distal wall in the vicinity of the bottom edge 4 of the intermediate wall such that the bottom edge 4 will not interfere with the cleaning of the drainage outlet after the pouch is emptied through the drainage outlet.