Vascular Access Port Bowed Base for Secure Vessel Attachment
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Solution Overview
Problem
Current vascular access ports face challenges in providing a secure and long-term attachment to blood vessels, leading to potential mobility issues and complications such as aneurysm, vessel stenosis, and bleeding due to inadequate fixation through multiple layers of the vessel wall.
Innovation Solution
The design incorporates a vascular access port with a bowed base that conforms to the vessel wall, secured via sutures through all layers of the vessel, and an ingrowth-inducing covering to promote tissue integration, ensuring a stable and secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the access port is attached to the vessel wall without secure fixation through multiple layers, then the attachment is simpler, but the port becomes mobile and causes complications such as aneurysm, vessel stenosis, and bleeding
Solution Approach 1:
The attachment mechanism is divided into multiple functional components: a base portion with sutures for securing to the vessel wall, a body portion for fluid access, and an ingrowth-inducing covering for tissue integration. This segmentation allows each component to perform its specific function while collectively achieving secure, stable attachment.
Solution Approach 2:
The base portion is configured with a bowed or curved shape that conforms to the outer surface of the vessel wall. This curvature enables the base to adapt to the cylindrical geometry of the vessel, distributing attachment forces evenly and preventing mobility while maintaining simple attachment procedure.
2Reliability
If the access port is securely fixed through all layers of the vessel wall, then the attachment stability is improved, but the complexity of the attachment procedure increases
Solution Approach 1:
Multiple attachment functions are merged into a single integrated base portion: sutures are incorporated directly into the base structure, the bowed shape provides both conformality and mechanical stability, and the ingrowth-inducing covering is integrated as part of the base assembly. This merging reduces the number of separate components and simplifies the overall attachment procedure.
Solution Approach 2:
The ingrowth-inducing covering on the base portion promotes automatic tissue integration over time, creating a self-sealing and self-securing mechanism that reduces the need for complex surgical techniques and follows-up procedures.
3Productivity
If the access port is repeatedly accessed through the same site, then the access efficiency is improved, but the vessel wall undergoes deformation and potential damage
Solution Approach 1:
The base portion with its bowed shape and ingrowth-inducing covering is pre-configured to create an optimized access site before repeated use. The structure anticipates repeated needle insertions and is designed to maintain structural integrity and promote tissue healing, preventing deformation accumulation over multiple access events.
Solution Approach 2:
The ingrowth-inducing covering acts as a protective layer that cushions the vessel wall during repeated access procedures. This covering promotes tissue integration and creates a protective interface that absorbs mechanical stress from repeated needle insertions, preventing direct damage to the vessel wall.
4Reliability
If the base of the access port conforms to the vessel wall with a bowed shape, then the attachment stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The base portion is designed with a standardized bowed shape with specific geometric parameters (radius of curvature, height, width) that can be precisely controlled during manufacturing. By defining specific parameter ranges rather than requiring perfect geometric conformity, the design achieves attachment stability while accommodating normal manufacturing variations.
Data Source
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AI summary
Ports for accessing a vessels within a patient include passageways that can guide needles or other access devices directly into the vessels. The ports can be implanted subcutaneously within a patient. Some ports may be used in the creation and use of vascular access buttonholes.