Cannula Fixation Plaster with Strain Relief Receptacle
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Solution Overview
Problem
Existing cannula fixation plasters fail to reliably secure cannulas to the skin, leading to unintentional detachment and increased risk of infection due to inadequate absorption of tensile forces and bacterial penetration through weak points in the barrier layer.
Innovation Solution
The cannula fixation plaster incorporates a receptacle for the gripping aid surrounded by an adhesive surface, with a flexible barrier layer and a strategically designed receiving slot and indentation to absorb tensile forces and prevent bacterial penetration, ensuring secure fixation and reduced infection risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a recess is provided in the barrier layer for cannula tubing passage, then the cannula can be inserted and fixed, but bacteria can penetrate through the recess and cause infections
Solution Approach 1:
The barrier layer is designed as a flexible thin film that conforms to the cannula and skin surface, creating a continuous protective seal around the cannula insertion site while allowing the cannula to pass through. This eliminates discrete recesses that could serve as bacterial entry points, while the flexibility maintains comfort and adherence.
Solution Approach 2:
The plaster combines multiple functional layers including a barrier layer with adhesive properties, a carrier layer for structural support, and potentially antimicrobial components. This composite structure provides both mechanical fixation and biological protection against infection simultaneously.
2Ease of operation
If the barrier layer is made thin for flexibility, then comfort and conformability improve, but tensile force absorption capability decreases
Solution Approach 1:
The plaster is divided into distinct functional layers: a thin flexible barrier layer for comfort and conformability, a stronger carrier layer for structural support and tensile force absorption, and an adhesive layer for secure attachment. Each layer is optimized for its specific function, allowing the thin barrier layer to provide flexibility while the composite structure as a whole provides strength.
3Ease of operation
If the carrier assembly uses a nonwoven fabric for flexibility, then comfort improves, but the ability to absorb tensile forces decreases
Solution Approach 1:
The carrier assembly combines a nonwoven fabric layer for flexibility and comfort with additional reinforcing elements or layers that provide tensile strength. This composite construction allows the material to maintain softness and conformability while adequately absorbing tensile forces generated during patient movement.
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 provides reliable cannula fixation by distributing tensile forces to the adhesive surface and preventing bacterial entry, thereby reducing the risk of unintentional loosening and infection.
Implementation Method 1
The carrier assembly (10) has an adhesive surface (10a)
Implementation Method 2
the barrier layer (100)... prevents the penetration of bacteria into the area of the cannula insertion site
Implementation Method 3
The receptacle absorbs tensile forces acting on the cannula and thus also on the grasping aid, transferring them to the adhesive surface
Data Source
Figure 1a~1b
Figure 2a~2b
AI summary
The invention relates to a plaster for fixing cannulas, comprising a carrier unit for fixation, by means of an adhesive surface, to the skin surrounding the cannula puncture site, and a barrier layer, arranged on the side of the carrier unit facing away from the adhesive surface, and inhibiting the migration of bacteria and covering the cannula puncture site. The carrier unit has a receptacle which passes through the carrier unit and is covered by the barrier layer, and the carrier unit is designed to receive a preferably strip-shaped handling aid of the cannula.