Medical Device Delivery Catheter Feedback Loop Control
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Solution Overview
Problem
Current medical devices for delivering implantable devices, such as heart valves, are invasive and require significant recovery times, and there is a need for less invasive methods that can accurately position and deploy these devices within the cardiovascular system.
Innovation Solution
A medical device system comprising a delivery catheter with an outer and inner shaft, where the inner shaft is translatable relative to the outer shaft, driven by a motor with a control mechanism and position sensor, allowing for precise control and feedback on the implantable device's position and torque application to ensure proper deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional surgical methods are used to implant medical devices, then the device can be securely implanted, but the invasiveness is high and recovery time is long
Solution Approach 1:
The patent replaces traditional mechanical surgical implantation with a percutaneous delivery system that uses a catheter-based approach. The implantable device is delivered through a delivery catheter that can be inserted through a small puncture in the skin, eliminating the need for large incisions and complex surgical procedures while maintaining secure implantation through controlled deployment mechanisms.
2Object-affected harmful factors
If a delivery catheter system is used for percutaneous delivery, then invasiveness is reduced, but precise positioning and control of the implantable device becomes more difficult
Solution Approach 1:
The patent incorporates a feedback loop that includes a position sensor to detect the position of the implantable device relative to the delivery catheter, a detector to sense when the device reaches the target location, and a controller to adjust the drive motor accordingly. This closed-loop control system ensures precise positioning and accurate deployment of the implantable device at the intended target site.
3Measurement precision
If a feedback control system is implemented, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a unified control system where the controller manages both the drive motor that translates the inner shaft and the deployment mechanism for the implantable device. The position sensor and detector work together with the same controller, creating a multi-functional system that achieves precise positioning without requiring separate complex subsystems for each function.
Data Source
AI summary
A drive assembly for use with a delivery catheter for delivering an implantable medical device includes a drive motor configured to be operably coupled to an inner shaft of the delivery catheter such that operation of the drive motor causes the inner shaft to translate relative to the outer shaft and a controller. The controller is configured to receive a position signal from a position sensor indicating a position of the implantable medical device relative to the outer shaft as well as a motor signal indicating a rotational position of an output shaft of the drive motor. The controller is configured to output a control signal instructing operation of the drive motor based upon the indicated rotational position of the output shaft of the drive motor and the indicated position of the implantable medical device relative to the outer shaft.