Servo Catheter Automated Navigation for Cardiac Ablation
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Solution Overview
Problem
Current cardiac ablation procedures for treating atrial arrhythmias are tedious and require substantial skill and time due to the manual navigation and delivery of RF energy, especially when targeting anatomical accessory pathways in the heart, such as around the pulmonary vein.
Innovation Solution
An automated radio frequency ablation system that includes a servo catheter and servo catheter control system interfaced with an endocardial mapping system, allowing for precise navigation and delivery of RF energy based on anatomic models of the heart, using pull wires and force transducers for complex control and safety feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual navigation and delivery of RF energy is used, then physician control and flexibility are maintained, but procedural time and complexity increase substantially
Solution Approach 1:
The catheter system performs self-navigation using automated servo mechanisms that respond to commands from the control system, eliminating the need for manual manipulation by the physician. The catheter autonomously positions itself at target sites based on pre-planned ablation locations displayed on the 3D anatomical map.
Solution Approach 2:
The patent replaces manual mechanical manipulation of the catheter with an automated servo control system that uses electronic signals to position the catheter tip precisely at target locations, substituting physician hand movements with automated mechanical actuation.
2Measurement precision
If sequential mapping and manual ablation is performed, then precise tissue targeting is achieved, but the procedure becomes tedious and skill-intensive
Solution Approach 1:
The system performs preliminary 3D mapping and visualization of the cardiac anatomy before ablation begins. Target sites are identified and marked on the anatomical model in advance, allowing the catheter to navigate directly to pre-determined locations rather than requiring sequential exploration during the procedure.
Solution Approach 2:
The patent introduces a computer-based 3D anatomical mapping system as an intermediary between the physician and the heart tissue. This virtual model serves as a roadmap that guides catheter navigation and targets ablation sites, reducing the need for direct manual exploration of cardiac structures.
3Productivity
If automated servo catheter navigation is implemented, then procedural time is reduced, but system complexity and cost increase
Solution Approach 1:
The servo catheter system is designed to perform multiple functions: navigation to target sites, delivery of RF energy, and integration with the 3D mapping system. This multi-functionality consolidates what would otherwise require separate devices and procedures into a single integrated platform.
Solution Approach 2:
The patent combines the navigation system, catheter actuation mechanisms, RF energy delivery system, and 3D anatomical mapping into a single integrated platform. The servo mechanisms are built into the catheter itself, merging navigation and treatment functions in one device.
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
Enables rapid and successful ablation of cardiac tissue with improved precision and reduced procedural time, addressing the challenges of manual navigation and tissue targeting in cardiac ablation.
Implementation Method 1
RF energy is delivered to the site. Ablation energy is typically delivered through the same catheter used to 'map'.
Implementation Method 2
radio frequency ablation catheter systems... automated rapid and successful ablation of cardiac tissue
Implementation Method 3
using pull wires and force transducers for complex control and safety feedback
Data Source
AI summary
A system that interfaces with a workstation endocardial mapping system allows for the rapid and successful ablation of cardiac tissue. The system allows a physician to see a representation of the physical location of a catheter in a representation of an anatomic model of the patient's heart. The workstation is the primary interface with the physician. A servo catheter having pull wires and pull rings for guidance and a servo catheter control system are interfaced with the workstation. Servo catheter control software may run on the workstation. The servo catheter is coupled to an RF generator. The physician locates a site for ablation therapy and confirms the location of the catheter. Once the catheter is located at the desired ablation site, the physician activates the RF generator to deliver the therapy.