Medical Device Over-Torque via 3D Surface Geometry
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Solution Overview
Problem
Current interventional medical systems face challenges in establishing adequate contact between medical devices and three-dimensional tissue surfaces within the body, particularly in navigating and treating cardiac arrhythmias, where precise contact is crucial but difficult to achieve.
Innovation Solution
A method involving the computation of three-dimensional tissue surface geometry to determine control variables for applying an over-torque magnetic field or other actuation methods to enhance contact between medical devices and target tissue surfaces, using virtual modeling to predict and optimize the torque for improved contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If computer assisted navigation is used to guide the distal tip of a medical device to a target destination, then the precision of device placement is improved, but the ability to establish adequate contact with the three dimensional tissue surface deteriorates
Solution Approach 1:
The system continuously monitors the position and orientation of the medical device relative to the three-dimensional tissue surface and provides real-time feedback to the control system. This feedback loop enables dynamic adjustment of device orientation and position to maintain adequate contact with the tissue surface while navigating to the target destination, resolving the contradiction between precise placement and reliable contact.
Solution Approach 2:
The system transitions from static navigation to dynamic control by enabling real-time adjustment of device orientation and position. The control system dynamically modifies device parameters based on continuous monitoring of contact conditions, allowing the device to adapt to the three-dimensional tissue surface geometry and maintain adequate contact during navigation and treatment.
2Adaptability or versatility
If the medical device is extended to reach the target destination through blood vessels and tissue, then the ability to access remote locations is improved, but the control over device orientation and contact with tissue surface deteriorates
Solution Approach 1:
The system replaces manual mechanical control with an automated control system that uses computer algorithms to manage device orientation and positioning. This substitution enables precise control of device orientation even when the device is extended through complex vascular pathways, maintaining ease of operation while accessing remote locations.
Solution Approach 2:
The control system integrates multiple functions including navigation, orientation control, contact detection, and treatment delivery into a single unified system. This multi-functional approach simplifies operation by providing comprehensive control through a single interface, making the system easier to operate while maintaining the ability to access and treat remote locations.
3Ease of operation
If manual manipulation of the medical device is used during surgical procedures, then the flexibility in device handling is improved, but the precision and repeatability of device placement deteriorates
Solution Approach 1:
The system introduces a computer-based control system as an intermediary between the operator and the medical device. This intermediary translates operator intentions into precise device movements, maintaining the flexibility of manual manipulation while significantly improving the precision and repeatability of device placement through automated control algorithms.
Solution Approach 2:
The system enables dynamic adjustment of device parameters such as orientation, position, and contact force through electronic control. This parameter control allows for precise and repeatable device placement while maintaining operational flexibility, as operators can adjust parameters in real-time based on procedural requirements without sacrificing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables improved contact and stability of medical devices with tissue surfaces, enhancing the precision and effectiveness of medical procedures such as electro-physiology mapping and ablation treatments by optimizing the orientation and rotation of medical devices based on local surface geometry.
Implementation Method 1
determining a change of at least one control variable for effecting an over-torque of a medical device to enhance contact of the device with the target surface
Data Source
AI summary
A method is provided for establishing contact of a medical device against a three-dimensional surface geometry within a subject body, the method comprising obtaining a three-dimensional tissue surface geometry of an anatomical region within the subject body, obtaining a target location on the surface for the device to contact, determining local surface geometry information in a neighborhood of the target location, and using this information to determine a change of at least one control variable for effecting an over-torque of the medical device to enhance contact of the device with the target surface.