Probe-Cavity Motion Modeling for Real-Time Catheter Stability
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Solution Overview
Problem
Current methods for stabilizing a probe or catheter within a cavity, such as the heart, are limited by the reliance on end-expirium locations, leading to inaccurate site stability data updates every five to eight seconds and missed short movements between expiriums, resulting in incomplete or inaccurate ablation procedures.
Innovation Solution
A system that estimates probe-chamber motion in real-time by accounting for respiration motion, using sensors to measure location and compensate for respiratory effects, allowing for continuous site stability assessment and accurate mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If site stability is based on end expirium locations, then the system can identify stable probe positions, but the site stability data can only be updated once every five to eight seconds and short movements between expiriums are missed
Solution Approach 1:
The patent implements continuous site stability assessment by processing probe location data at every time point rather than only at end-expirium moments. The system continuously evaluates whether the probe remains within a stable region relative to the cavity wall, enabling real-time detection of stability changes and short movements without being constrained by the respiratory cycle frequency.
Solution Approach 2:
The patent introduces a stable region definition as an intermediary concept between the probe position and the stability determination. By defining a stable region around the cavity wall and continuously checking whether the probe location falls within this region, the system achieves high-frequency stability assessment without requiring direct measurement at every respiratory phase.
2Device complexity
If end expirium-based stability assessment is used, then the system simplifies the analysis, but short and sharp movements that happen between end expiriums are missed altogether
Solution Approach 1:
The system continuously evaluates probe stability by assessing whether the probe location falls within the defined stable region at each time point. This continuous assessment captures all movements including short and sharp movements between end-expirium points, eliminating the information loss inherent in periodic sampling while maintaining computational feasibility through the stable region framework.
Solution Approach 2:
The patent transitions from a static, periodic assessment model to a dynamic continuous assessment model. By continuously tracking probe location relative to the stable region and updating stability status in real-time, the system adapts to rapid movements and changing conditions, significantly improving reliability for detecting transient events while managing complexity through efficient spatial reasoning.
Data Source
AI summary
Systems, apparatuses, and methods provide probe-cavity location and motion data based on probe location and respiration data.