Rotatable Positioning Device for Percutaneous Valve Adjustment
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Solution Overview
Problem
Current percutaneous aortic valve replacement (PAVR) procedures lack a design for adjusting the circumferential position of prosthetic valves after deployment, leading to inaccurate positioning and increased surgical risks due to the inability to reposition the valve post-release.
Innovation Solution
A rotatably adjustable positioning device featuring a fixing member, a connection mechanism, and steering lines that allow for precise circumferential adjustment of the prosthetic valve, enabling accurate positioning and reducing surgical complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the prosthetic valve is deployed without circumferential adjustment capability, then the device structure is simple, but the positioning accuracy deteriorates
Solution Approach 1:
The patent applies the dynamics principle by enabling the connection mechanism to rotate relative to the fixing member after valve deployment. The steering line allows dynamic adjustment of the prosthetic valve's circumferential position, transforming a static deployment system into a dynamic positioning system that can adapt to different anatomical requirements.
Solution Approach 2:
The steering line serves as an intermediary element that transmits control from the proximal end to the distal connection mechanism. This intermediary allows remote manipulation of the valve's circumferential position without requiring direct access to the valve site, enabling precise positioning through flexible force transmission.
2Reliability
If circumferential adjustment is added to the positioning device, then the positioning accuracy improves, but the device complexity increases
Solution Approach 1:
The connection mechanism is designed with rotational freedom relative to the fixing member, allowing dynamic adjustment of the prosthetic valve's orientation. This dynamic capability enables the system to compensate for positioning errors and adapt to varying anatomical geometries, significantly improving positioning reliability.
Solution Approach 2:
The steering line provides a feedback mechanism where the operator can sense the position and resistance at the distal end and adjust accordingly. This tactile feedback loop allows real-time correction of positioning errors and ensures accurate placement of the prosthetic valve in the target location.
3Adaptability or versatility
If the prosthetic valve cannot be repositioned after release, then the operation is simple, but the adaptability to complex vascular geometries deteriorates
Solution Approach 1:
The patent enables the connection mechanism to rotate and adjust the prosthetic valve's circumferential position after deployment through the steering line. This dynamic adjustment capability allows the system to adapt to complex vascular geometries and anatomical variations, transforming a rigid one-size-fits-all device into a versatile system that can accommodate diverse patient requirements.
Solution Approach 2:
The positioning device achieves multi-functionality by combining the basic deployment function with the additional circumferential adjustment function. The steering line mechanism allows the same device to handle various vascular geometries and positioning requirements, making it universally applicable across different patient populations and anatomical conditions.
Data Source
AI summary
Provided is a rotatably adjusted positioning device. The rotatably adjusted positioning device includes a fixing member (2), a steering mechanism (1), and at least one steering line (3). The connection mechanism (1) is substantially extending in a longitudinal direction and is rotatably connected to a distal side of the fixing member (2). The fixing member (2) is provided with a guide channel (21). One end of the steering line (3) is connected to the connection mechanism (1), and another end is connected to a steering mechanism (5) through a corresponding guide channel (21). The steering line (3) is operated by the steering mechanism (5) to make the connection mechanism (1) rotate relative to the fixing member (2), achieving an adjustment of a circumferential position of the connection mechanism (1) and components associated with the connection mechanism (1).