Fluidic Connector Reinforcement for NPWT Stress Distribution
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Solution Overview
Problem
Current negative pressure wound therapy (NPWT) systems face issues with stiffness of suction ports causing wound disturbance, tubing obstructions, and adhesive-related stress concentrations leading to pin holing, which can delay healing and cause discomfort.
Innovation Solution
A wound treatment apparatus with a fluidic connector featuring a sealing surface, an elongate conduit, and reinforcement for securement, including adhesive tape or a skirt, to distribute stress and prevent pin holing, while maintaining effective negative pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a suction port is adhered to the top surface of a wound dressing using adhesive, then the suction port is secured to the dressing, but localized peaks of adhesive create areas of intense stress concentration which can lead to pin holing in the dressing
Solution Approach 1:
The patent introduces a reinforcement layer positioned between the suction port and the wound dressing top surface. This reinforcement layer has different mechanical properties than both the suction port and the dressing, creating a gradient that distributes stress more evenly. The reinforcement layer acts as a stress-distributing interface that prevents localized stress concentration while maintaining strong adhesion.
Solution Approach 2:
The reinforcement layer serves as an intermediary element between the suction port adhesive and the wound dressing top surface. It mediates the stress transfer by providing a compliant interface that prevents direct transmission of concentrated forces to the dressing, thereby eliminating pin holing while preserving securement strength.
2Reliability
If the suction port is compressed to the dressing top surface with adhesive in between, then adhesion is achieved, but this may cause localized peaks of adhesive creating stress concentration
Solution Approach 1:
The reinforcement layer creates a localized zone with optimized mechanical properties between the adhesive and dressing. This layer has controlled thickness and material composition that allows it to flatten adhesive peaks and distribute compressive forces uniformly across the adhesion interface, preventing stress concentration while maintaining reliable bonding.
3Ease of operation
If tubing or conduit connected to the suction port is pulled, then connection is maintained, but the suction port may be peeled from the dressing
Solution Approach 1:
The reinforcement layer is positioned beforehand between the suction port and dressing to cushion against future pull forces. When tubing is pulled, the reinforcement layer absorbs and distributes the tensile stress across a larger area, preventing the concentrated peeling forces that would otherwise detach the suction port from the dressing.
4Object-affected harmful factors
If a reinforcement is positioned between the suction port and the top layer, then stress distribution is improved, but device complexity increases
Solution Approach 1:
The reinforcement layer is implemented as a thin, flexible film or sheet material that can be easily integrated into the existing suction port assembly. This thin-film approach provides effective stress distribution without adding significant bulk, weight, or manufacturing complexity to the device structure.
Data Source
AI summary
Disclosed herein are several embodiments of a wound treatment apparatus employing a fluidic connector for negative pressure wound therapy and methods of using the same. Some embodiments are directed to improved fluidic connectors for connecting to a wound site, for example a fluidic connector including a reinforcement, and methods of using the same.