Intravascular Device Positioning With Magnetic Node Tracking
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Solution Overview
Problem
Existing intravascular medical procedures face challenges in accurately determining the position and orientation of cardiovascular devices, particularly replacement valves, due to limitations in imaging techniques, making it difficult to ensure proper installation and prevent patient injury.
Innovation Solution
A method and system using a sensing device with multiple nodes to determine node locations, project a mitral annulus plane, and calculate a deployment point for intravascular devices, incorporating radiopaque or echogenic markers and sensors for precise positioning, and employing interpolation and triangulation techniques to generate enhanced images for navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If imaging techniques (x-ray, ultrasound) are used to guide intravascular device positioning, then the ability to visualize anatomy and device movement is improved, but the precision of determining device position and orientation deteriorates
Solution Approach 1:
The patent replaces traditional imaging-based positioning (x-ray, ultrasound) with a magnetic field-based sensing system. Sensors detect the position and orientation of magnets attached to the catheter, providing precise quantitative data without relying on image interpretation. This substitution of mechanical/optical systems with magnetic sensing directly resolves the contradiction between visibility and measurement precision.
Solution Approach 2:
The patent introduces magnets as intermediary elements that serve as precise position indicators. These magnets are attached to the catheter and detected by external sensors, acting as a mediator between the device and the positioning system. This intermediary approach enables accurate position determination without requiring direct imaging of the device itself, resolving the precision limitation of traditional imaging.
2Ease of operation
If traditional imaging techniques are used for device positioning, then procedural guidance is provided, but the ability to determine accurate position and orientation deteriorates
Solution Approach 1:
The system replaces image-guided navigation with magnetic field-based tracking. The sensors continuously monitor the magnetic field generated by magnets on the catheter, providing real-time position and orientation data with high precision. This substitution maintains ease of operation through continuous guidance while dramatically improving measurement precision.
Solution Approach 2:
The patent implements a feedback system where sensors continuously detect magnet positions and provide real-time information about catheter location and orientation. This feedback loop enables precise control and adjustment during the procedure, maintaining ease of operation while achieving high measurement accuracy that imaging techniques cannot provide.
Data Source
AI summary
Systems and methods are provided for positioning an intravascular device. A sensing device includes a plurality of nodes disposed on a distal portion of the sensing device. The distal portion of the sensing device is inserted into a circumflex artery. A plurality of node locations of the plurality of nodes are determined in a coordinate system when the distal portion of the sensing device is inserted into the circumflex artery. A projected plane of a mitral annulus is determined in the coordinate system based on the plurality of node locations. A projected deployment point for the intravascular device is determined in the coordinate system based on the plurality of node locations.