Electrode Catheter Lead Wire Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrode catheters face issues where the rotational operation portion interferes with the lead wire, causing noise, damage, or breakage, and the irrigation pipe may kink, impairing liquid flow characteristics during operation.
Innovation Solution
An electrode catheter design featuring a flexible tube member with side holes at the proximal end, allowing the operating wire to pass through and extend outside, while the lead wire is protected within the tube member, preventing interference and maintaining lumen integrity during rotational operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotational operation portion and operating wire are positioned to allow distal-end deflecting operation, then the catheter can perform deflection operations, but the rotational operation portion and operating wire interfere with the lead wire causing noise, damage, or breakage
Solution Approach 1:
The catheter structure is divided into distinct spatial zones: the lead wire is routed through the central lumen of the tube member, while the operating wire is positioned in a separate space between the tube member and the rotational operation portion. This segmentation prevents interference between the lead wire and operating wire during rotational operations, eliminating noise and damage risks while maintaining both functionalities.
2Adaptability or versatility
If the injection pipe extends through the handle for liquid supply, then irrigation function is provided, but the injection pipe interferes with the rotational operation portion and operating wire causing the pipe to kink and lumen collapse
Solution Approach 1:
The injection pipe is repositioned from a conventional path through the handle to an alternative route that extends along the outer periphery of the handle. This dimensional change in the pipe's spatial arrangement eliminates interference with the rotational operation portion and operating wire, preventing kinking and lumen collapse while maintaining the irrigation function.
3Ease of operation
If the lead wire passes through the rotational operation portion to connect electrodes, then electrical connection is achieved, but repeated rotation operations cause the lead wire to become abraded or break
Solution Approach 1:
The lead wire is extracted from the rotational operation portion and routed through the central lumen of the tube member instead. This eliminates the lead wire's exposure to repeated rotation and friction, preventing abrasion and breakage, while the operating wire remains freely rotatable in the space between the tube member and rotational operation portion for deflection control.
Data Source
AI summary
It is an object to provide an electrode catheter in which, when a rotational operation portion is operated, the rotational operation portion and an operating wire do not interfere with a lead wire, do not generate noise during the operation, and do not cause damage or breakage of the lead wire even when the operation is repeated. An electrode catheter according to the present invention includes a tube member 10, a handle 20 having a rotational operation portion 23, electrodes 31 attached to the tube member 10, lead wires 41, an electrode connector 50, and operating wires 71 and 72. A proximal end portion 12 of the tube member 10 is inserted from a distal end of the handle 20 to an inside of the handle 20, and extends in the inside of the handle 20 in the proximal end direction beyond the rotational operation portion 23. Side holes 111 and 115 are formed in a pipe wall of the proximal end portion 12 of the tube member 10. Proximal end portions of the operating wires 71 and 72 pass through the side holes and extend to the outside of the tube member 10. Proximal ends of the operating wires 71 and72 are fixed to wire fasteners 231 and 232.