Catheter Handle Rotary Mechanism for Precise Distal Control
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Solution Overview
Problem
Existing catheter handles lack a novel structure that efficiently operates the distal end of a catheter, limiting the precision and control of catheter manipulation within body cavities.
Innovation Solution
A catheter handle featuring a rotary body with a shaft and sliders that engage with wires, allowing for precise control of the catheter's distal end by rotating the rotary body relative to the handle body, thereby displacing the sliders and wires within the catheter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional catheter handles with simple wire pulling mechanisms are used, then the structure is simple and easy to manufacture, but the precision and control of catheter manipulation is insufficient
Solution Approach 1:
The handle is divided into multiple functional components: a rotary body for rotational input, multiple sliders (first slider, second slider, etc.) for independent wire control, and a shaft for structural support. Each slider can independently control a specific wire, allowing precise manipulation of the catheter's distal end in multiple directions simultaneously
Solution Approach 2:
The rotary body is designed to rotate around the axial direction, converting rotational motion into linear displacement of the sliders through threaded engagement. This dynamic mechanism allows continuous adjustment of wire tension and catheter deflection angle, providing smooth and precise control
2Adaptability or versatility
If multiple wires are used to control catheter deflection in multiple directions, then the control capability is improved, but the device complexity and difficulty of operation increase
Solution Approach 1:
Multiple wire control functions are merged into a single rotary body that rotates around one axis. The threaded engagement between the rotary body and multiple sliders allows one rotational motion to simultaneously control multiple wires in a coordinated manner, simplifying the operator's input while maintaining multi-directional control capability
Solution Approach 2:
The rotary body serves multiple functions: it provides rotational input control, converts rotational motion to linear displacement, and simultaneously engages with multiple sliders to control multiple wires. This multi-functional design reduces the number of separate controls needed while maintaining comprehensive control capability
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
This configuration enables precise and controlled bending of the catheter's distal end, enhancing the operator's ability to navigate and manipulate the catheter within body cavities.
Implementation Method 1
the rotary body has an inner cavity extending in an axial direction, provided to be rotatable around the axial direction relative to the handle body, and having a first guiding part extending in the axial direction on an inner surface of the inner cavity; a shaft disposed in the inner cavity of the rotary body, extending in the axial direction, fixed to the handle body, having a first portion and a second portion positioned proximal to the first portion with respect to the axial direction, having a first engagement part extending spirally on an outer surface of the first portion and a second engagement part extending spirally in an opposite direction to the first engagement part on an outer surface of the second portion
Data Source
AI summary
A catheter handle (1) comprising: a rotary body (3) provided to be rotatable around an axial direction relative to the handle body (2), and having a first guiding part (19) extending in the axial direction; a shaft (4) disposed in an inner cavity of the rotary body (3), fixed to the handle body (2), having a first engagement part (11) extending spirally in one direction and a second engagement part (12) extending spirally in another direction, and a second guiding part (20) extending in the axial direction; a first slider (5), an inner surface of which is engaged with the first engagement part (11), having a fourth engagement part (14) on an outer surface thereof, which engages with the first guiding part (19); a second slider (6), an inner surface of which is engaged with the second engagement part (12), having a sixth engagement part (16) on an outer surface thereof, which engages with the first guiding part (19); a first bushing (7) rotatably connected to a distal side of the first slider (5), and engaged with the second guiding part (20), wherein a first wire (9) is fixed to; and a second bushing (8) rotatably connected to a distal side of the second slider (6), and engaged with the second guiding part (20), wherein a second wire (10) is fixed to.