Catheter Dressing Circumferential Seal Gap Elimination
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Solution Overview
Problem
Traditional catheter dressing methods fail to create a sterile seal at the catheter-skin insertion site due to gaps between the round catheter and the skin, leading to potential contamination and infection, especially exacerbated by movement and exposure to liquids.
Innovation Solution
A catheter dressing system featuring an adhesive plate and a flexible sheath that extends to surround the catheter, forming a sealed chamber and maintaining sterility, with optional antimicrobial materials and a securement mechanism to prevent longitudinal movement of the catheter while allowing non-longitudinal movement, thus enhancing sealing and infection prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional adhesive patch-type dressings are used to cover the catheter insertion site, then the dressing can be easily applied and removed, but gaps between the round catheter and the skin allow contamination and infection
Solution Approach 1:
The patent employs a flexible adhesive film dressing that conformally wraps around the catheter and adheres to the skin, eliminating gaps between the catheter and skin surface. This flexible film structure maintains close contact with the cylindrical catheter while adhering to the curved skin surface, preventing contamination pathways.
Solution Approach 2:
The dressing transitions from a traditional flat 2D patch to a 3D conformal structure that wraps around the catheter in multiple dimensions. This dimensional transformation allows the dressing to simultaneously contact the catheter surface and the skin surface, creating a sealed environment that prevents contamination.
2Reliability
If the catheter is secured firmly to prevent movement, then the seal integrity is maintained, but the catheter cannot be adjusted or repositioned when needed
Solution Approach 1:
The patent incorporates dynamic elements into the dressing system, including adjustable securing mechanisms that can be tightened or loosened, and flexible components that accommodate catheter movement while maintaining seal integrity. This allows the system to transition between secured and adjustable states as needed.
Solution Approach 2:
The dressing is divided into functional segments: an adhesive sealing layer that maintains seal integrity, and a separate securing layer with adjustable fastening elements that provide catheter stabilization. This segmentation allows independent optimization of seal reliability and catheter adjustability.
3Object-affected harmful factors
If the dressing is made waterproof to prevent liquid contamination, then infection risk is reduced, but the dressing cannot be removed or adjusted without compromising the seal
Solution Approach 1:
The patent incorporates pre-designed release features and activation mechanisms in the waterproof dressing. These preliminary actions include breakable seals, peeling tabs, or activation layers that allow controlled removal or adjustment of the dressing when needed, while maintaining waterproof integrity during normal use.
Solution Approach 2:
The patent introduces an intermediary activation layer or mechanism between the waterproof barrier and the external environment. This intermediary element allows controlled breach or opening of the waterproof seal when removal is needed, while maintaining the waterproof barrier's integrity during normal protective function.
4Length of moving object
If the catheter extension is made longer to reach distant insertion sites, then access to distant vessels is improved, but the risk of movement and dislodgement increases
Solution Approach 1:
The patent employs nested securing structures where multiple layers of stabilization are integrated within each other. The catheter extension is secured by nested anchoring mechanisms that provide progressive stabilization, preventing dislodgement while maintaining the extended reach to distant insertion sites.
Data Source
AI summary
Devices and methods are provided for sealing a catheter insertion site to maintain sterility. In one aspect of the invention, mounting handle/dressing assemblies and kits are disclosed for creating a sterile sealed environment around a catheter insertion site. For example, the dressings of the present invention can be pre-disposed around a mounting handle and connector. The connector is joined to the proximal end of the catheter and then the dressing can be slid along the mounting handle until it surrounds the insertion site. Once the dressing is adhesively applied to the skin and locked into place by an annular fitting between the dressing and the connector, the handle can be removed and discarded, leaving only the dressing, and catheter connector in place. The catheter connector preferably has a needle-free connector port at its proximal end for connection to IV lines or other infusion devices.