Catheter Drive Assembly for Independent Linear and Rotary Control
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Solution Overview
Problem
Existing catheterization procedures lack a device drive system that allows independent control of linear and rotary movements of elongated medical devices, such as guide wires and catheters, which is responsive to user input.
Innovation Solution
A drive assembly for a catheter procedure system featuring a body with a distal and proximal pinch mechanism, coupled with a linear and rotational drive mechanism, enabling independent linear and rotary movements of percutaneous devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a robotic catheter procedure system is used to precisely steer a coronary guide wire, then navigation precision is improved, but the system complexity increases due to the need for independent linear and rotational drive mechanisms
Solution Approach 1:
The drive assembly is segmented into two independent drive mechanisms: a linear drive mechanism for axial movement and a rotational drive mechanism for rotational movement. Each mechanism operates independently to control the percutaneous device, allowing precise navigation while maintaining modular system architecture that manages complexity through functional separation.
2Device complexity
If manual insertion of a guide wire is performed, then the system complexity is reduced, but the precision and control of tip direction and axial advancement deteriorates
Solution Approach 1:
A robotic drive assembly acts as an intermediary between the operator and the percutaneous device. The drive assembly includes engagement mechanisms (pinches) that securely hold the device and transmit controlled linear and rotational movements, providing precise tip direction control and axial advancement precision while maintaining manageable system complexity through automated control.
3Device complexity
If a single drive mechanism is used for both linear and rotational movements, then the device complexity is reduced, but the ability to perform independent linear and rotary movements deteriorates
Solution Approach 1:
The drive assembly is divided into separate linear and rotational drive mechanisms that operate independently. The linear drive mechanism controls axial movement while the rotational drive mechanism controls rotational movement, enabling versatile independent movement capabilities necessary for precise catheter navigation through complex vascular anatomy.
Data Source
AI summary
A drive assembly for a catheter procedure includes a body configured to receive a percutaneous device where the body has a first end and a second end. A distal pinch is configured to releasably engage the percutaneous device. A proximal pinch is positioned on the first end of the body and is configured to releasably engage the percutaneous device. A linear drive mechanism is coupled to the body and configured to move the body to cause linear movement of the percutaneous device in a first direction while the proximal pinch is disengaged from the percutaneous device and the distal pinch is engaged with the percutaneous device.