Abdominal Wound Dressing Joining Means
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Solution Overview
Problem
During negative-pressure therapy of open abdominal wounds, the individual material plies of bandages may undesirably move with respect to each other, leading to complications such as adhesive bonding with internal organs or the greater omentum, which can cause tissue damage and fistula formation during bandage changes.
Innovation Solution
A dual-bandage system comprising a first fluid-permeable organ-protecting layer and a second porous polymer foam layer, joined using a joining means such as hook-and-loop elements or three-dimensional structures, to prevent movement and facilitate simultaneous removal of both layers during therapy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple bandage plies are used for negative-pressure therapy of abdominal wounds, then the protective function is improved, but the plies may move relative to each other causing adhesive bonding with internal organs
Solution Approach 1:
The patent combines multiple bandage plies into a single integrated unit using joining means (adhesives, welds, or mechanical connectors) that fuse the plies together. This merging prevents relative movement between plies while maintaining the protective functions of each layer, thereby eliminating the harmful adhesive bonding effect while preserving reliability.
Solution Approach 2:
The joining means are applied in advance during manufacturing to permanently attach the bandage plies together before application to the patient. This preliminary action ensures that the plies remain fixed relative to each other throughout the therapy period, preventing the harmful effect of adhesive bonding with internal organs during bandage changes.
2Reliability
If bandage plies are joined permanently, then movement is prevented, but simultaneous removal becomes difficult
Solution Approach 1:
The patent designs the joining means to allow for controlled separation of bandage plies during removal. The plies can be detached sequentially or simultaneously using specific removal techniques, enabling recovery of the bandage components after use while maintaining position stability during therapy.
Solution Approach 2:
The joining means provide dynamic characteristics that allow the bandage to adapt during removal. The connections can be broken in a controlled manner, transitioning from a rigid fixed state during therapy to a separable state during removal, thus resolving the contradiction between position stability and removal ease.
3Reliability
If the first bandage ply is applied directly to internal organs, then organ protection is improved, but the ply may shift position during therapy
Solution Approach 1:
The first bandage ply is merged with subsequent plies using joining means that prevent relative movement. This combination stabilizes the organ-protecting layer in position while maintaining its direct contact with internal organs, thus preserving organ protection reliability without compromising position stability.
Solution Approach 2:
The joining means are strategically positioned at specific locations on the bandage plies to provide localized anchoring. This allows the first ply to remain in optimal contact with internal organs for protection while the joining points prevent unwanted shifting, achieving both organ protection and position stability through localized quality enhancement.
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 system effectively prevents movement of the bandage plies, reducing the risk of adhesive bonding and tissue damage, while allowing for easy and safe removal of the bandage during therapy, thereby improving the reliability and safety of negative-pressure therapy in the abdominal region.
Implementation Method 1
a joining means by means of which the second bandage ply, after application of the first ply to exposed internal organs or to the greater omentum, can be joined to the first bandage ply
Implementation Method 2
three-dimensional structures, which bring about adhesion between the surfaces of first and second bandage ply
Data Source
AI summary
The invention relates to an apparatus suitable for use in the negative-pressure therapy of the open abdomen, including a first bandage ply (11, 21, 31) having a first and a second side, as organ-protecting layer, the first side being intended for application to a wound base (3), more particularly exposed internal organs or the greater omentum, a second bandage ply (12, 22) provided separately from the first bandage ply and having a first and a second side, the first side of the second bandage ply (12, 22) being intended for application to the second side of the first bandage ply, a joining means by means of which the second bandage ply (12, 22), after application of the first ply (11, 21, 31) to exposed internal organs or to the greater omentum, can be joined to the first bandage ply (11, 21, 31), making it possible to avoid movement of the first bandage ply (11, 21, 31) with respect to the second bandage ply (12, 22) as far as possible during the therapy and/or facilitating simultaneous removal of first (11, 21, 31) and second bandage ply (12, 22).