Hemodialysis Catheter Hub Attachment Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hemodialysis catheter systems face challenges in securely attaching the catheter hub to the elongated catheter after subcutaneous tunneling, which can lead to fluid communication issues and instability during the procedure.
Innovation Solution
The catheter system incorporates various hub attachment mechanisms, including locking collars, elastomeric sleeves, and suture wings, that allow for secure attachment of the catheter hub to the catheter tube post-implantation, ensuring fluid communication and stability through compressive frictional relationships and sealing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the catheter hub is attached to the elongated catheter after subcutaneous tunneling, then the catheter system can be assembled in vivo, but the attachment mechanism must provide sufficient stability and fluid communication without compromising reliability
Solution Approach 1:
The catheter system is divided into separate components (elongated catheter and catheter hub) that can be attached after implantation. The catheter is inserted through the subcutaneous tunnel first, then the hub is attached externally at the skin surface, allowing staged assembly and reducing surgical complexity.
Solution Approach 2:
A collar structure serves as an intermediary component between the catheter and hub. The collar is attached to the catheter and provides a mounting interface for the hub, facilitating secure connection while maintaining the ability to assemble components separately.
2Reliability
If a secure attachment mechanism is used to prevent disconnection, then attachment stability is improved, but the complexity of the device increases
Solution Approach 1:
Multiple attachment features are combined into a single integrated collar structure. The collar incorporates locking features, sealing surfaces, and mounting interfaces all in one component, reducing the number of separate parts while maintaining secure attachment.
Solution Approach 2:
The collar is pre-attached to the catheter during catheter preparation, so that when the hub is attached to the collar, the connection is already stabilized. This preliminary attachment step simplifies the final assembly process.
3Reliability
If the attachment mechanism provides fluid communication between hub and catheter, then functional effectiveness is improved, but the risk of fluid communication issues increases if attachment fails
Solution Approach 1:
A sealing mechanism is incorporated at the interface between the collar and hub to prevent fluid leakage. The sealing feature is built into the attachment structure, providing a backup against fluid communication failures even if the mechanical connection experiences stress.
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 secure attachment of the catheter hub to the catheter tube maintains fluid communication and stability, enhancing the reliability and effectiveness of the hemodialysis procedure by preventing disconnection and ensuring proper fluid flow.
Implementation Method 1
secure attachment of the catheter hub to the catheter tube post-implantation, ensuring fluid communication and stability through compressive frictional relationships
Implementation Method 2
The catheter system incorporates various hub attachment mechanisms, including locking collars, elastomeric sleeves, and suture wings
Implementation Method 3
The catheter system incorporates various hub attachment mechanisms, including locking collars, elastomeric sleeves, and suture wings
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A hemodialysis catheter assembly adapted for use in a subcutaneous tunneling procedure incorporates a mechanism for securing the catheter hub member (110) to the elongated catheter (14), and to provide the requisite fluid communication between fluid passages within the hub and the catheter lumens within the catheter. The catheter hub member may be connected to the elongated catheter after implantation of the catheter via a subcutaneous tunneling procedure.