Multi-direction steerable handles for catheter control
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Solution Overview
Problem
Conventional catheter control systems offer limited flexibility, requiring multiple actuations to achieve desired radial and circumferential movements, which can be cumbersome and restrictive in transvascular procedures.
Innovation Solution
The implementation of a cam-based mechanism in catheter control handles allows for independent control of radial flexion magnitude and circumferential angle, utilizing axially movable sliders, ball-and-socket, or gimbal mechanisms to provide fine and direct control without rotating the entire catheter, along with a clutch mechanism for fixing circumferential flexion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional catheter control systems with multiple levers and dials are used, then radial flexion in multiple directions can be achieved, but the operation becomes cumbersome and complex
Solution Approach 1:
The patent combines multiple control functions into a single integrated control handle with a unified lever and dial system. The lever controls radial flexion magnitude while the dial controls circumferential angle, merging what would traditionally require multiple separate actuators into one coordinated control mechanism, thereby reducing operational complexity while maintaining full directional control capability
Solution Approach 2:
The control handle is designed as a multi-functional device where a single lever-dial assembly can generate flexion in any radial direction through coordinated movement. The universal control mechanism replaces the need for multiple specialized levers and dials, allowing one control unit to perform the work of several while simplifying the user interface
2Ease of operation
If multiple actuation devices are used to control catheter flexion, then desired circumferential direction can be achieved, but the number of actuators increases operational complexity
Solution Approach 1:
The patent merges the functions of multiple actuators into a single lever-dial control assembly. The lever provides radial flexion control while the dial provides circumferential angle control, and both operate from one integrated mechanism rather than requiring separate actuators for each degree of freedom, thereby improving ease of operation without increasing actuator count
Solution Approach 2:
The control system uses two-dimensional control (lever position and dial rotation) to achieve three-dimensional catheter tip positioning in terms of flexion direction. This dimensional approach allows a single actuator assembly to control multiple degrees of freedom that would otherwise require multiple separate actuators, simplifying the control interface while maintaining full steerability
Data Source
AI summary
Disclosed herein are catheter assemblies for controlling a position of a prosthetic device. The catheter assemblies can include a gimbal assembly, a catheter, and a plurality of control elements. The can include an outer gimbal member and an inner gimbal member. The catheter is coupled to the gimbal assembly. The control elements extend distally through the catheter. Movement of the gimbal assembly changes tension on the plurality of control elements.