Tunneling System Catheter Coupling Mechanism
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Solution Overview
Problem
Current hemodialysis catheter insertion techniques face challenges in securely attaching the catheter to insertion devices and maintaining a minimal profile for easy passage through subcutaneous tissue, while also requiring adaptability for various catheter types and procedures.
Innovation Solution
A tunneling system with an elongate member and various coupling embodiments, such as pins, threads, clamping members, and compression rings, securely engages catheters, facilitating their placement within subcutaneous tunnels and allowing for maneuverability during procedures like hemodialysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the catheter is securely attached to the insertion device, then reliability of catheter placement is improved, but device complexity increases due to multiple coupling mechanisms
Solution Approach 1:
The coupling mechanism is divided into separate functional components: a coupling element on the insertion device and a corresponding receptacle on the catheter. This segmentation allows each component to be optimized independently while maintaining secure attachment through their interaction.
Solution Approach 2:
The coupling element is designed to be received within a receptacle structure, creating a nested configuration where the coupling element fits inside the catheter body or designated receptacle area, providing secure attachment while maintaining a compact overall structure.
2Ease of operation
If the profile of the insertion device is minimized, then ease of passage through subcutaneous tissue is improved, but manufacturing precision requirements increase
Solution Approach 1:
The insertion device incorporates a flexible sheath or tubular structure that can conform to tissue contours and bend as needed during passage through subcutaneous tissue. This flexibility allows the device to maintain a minimal effective profile while accommodating the natural variations in tissue anatomy.
Solution Approach 2:
The insertion device features curved or tapered transitions rather than sharp angles, with smooth contours that facilitate passage through tissue. The distal end may be tapered or rounded to reduce tissue disruption while maintaining structural integrity.
3Reliability
If the coupling mechanism is made robust, then reliability of catheter securement is improved, but ease of operation during insertion is worsened
Solution Approach 1:
The coupling mechanism incorporates movable or flexible elements that allow dynamic adjustment during insertion. The coupling element can flex or rotate to accommodate insertion forces, then lock into place to provide robust securement once positioned.
Solution Approach 2:
The coupling elements are pre-configured in a ready-to-engage state before insertion begins. The coupling element is positioned and oriented in advance to facilitate smooth engagement with the catheter receptacle, reducing the complexity of manual manipulation during the procedure.
Data Source
AI summary
A tunneling system includes an elongate tunneling member defining a longitudinal axis along at least a portion of a longitudinal length thereof. The elongate tunneling member has a first end and a second end. The second end of the elongate tunneling member includes a coupling segment adapted for securely engaging a catheter.