Dynamic Adaptive Respiration Compensation for Catheter Localization
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Solution Overview
Problem
Existing localization systems for determining catheter position within a beating heart face challenges with dynamic changes in respiration patterns and cardiac activity, leading to reduced accuracy and interference from sudden changes in patch impedance measurements.
Innovation Solution
A method and system that implement dynamic adaptive respiration compensation using principal component analysis and singular value decomposition to adjust weights for motion compensation, combined with automatic gain control to mitigate noise and interference, ensuring continuous accurate localization throughout an electrophysiological study.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static respiration compensation is determined during an electrophysiological study, then initial motion compensation accuracy is improved, but the system cannot adapt to changing respiration patterns or catheter positions, leading to reduced accuracy over time
Solution Approach 1:
The patent transforms the static compensation system into a dynamic one by continuously updating the respiration compensation artifact throughout the electrophysiological study. The system automatically detects changes in respiration patterns and catheter positions, and recalibrates the compensation parameters in real-time, ensuring sustained localization accuracy despite physiological variations.
Solution Approach 2:
The system implements feedback mechanisms by monitoring the ongoing electrophysiological signals and comparing the actual catheter position against the compensated position. When deviations are detected that indicate changes in respiration patterns or catheter movement, the system adjusts the compensation parameters accordingly, creating a closed-loop control system that maintains accuracy.
2Adaptability or versatility
If continuous monitoring and updating of compensation parameters is implemented, then adaptability to changing conditions is improved, but system complexity and computational requirements increase
Solution Approach 1:
The patent applies partial updating strategies where not all compensation parameters are continuously recalculated at full computational intensity. Instead, the system selectively updates parameters based on detected changes, performing full recalibration only when necessary and using lighter computational methods during stable periods, thus reducing overall computational burden while maintaining adaptability.
3Productivity
If manual user direction is required to determine respiration compensation, then system simplicity is maintained, but productivity and continuous accuracy during procedures are reduced
Solution Approach 1:
The system implements self-service automation by automatically detecting when respiration pattern changes or catheter position changes occur during the electrophysiological study. The system autonomously recalibrates the compensation parameters without requiring manual intervention from the operator, thereby maintaining continuous accuracy and improving procedural productivity while reducing the burden on the medical professional.
Data Source
AI summary
A system for determining a location of an electrode of a medical device (e.g., a catheter) in a body of a patient includes a localization block for producing an uncompensated electrode location, a motion compensation block for producing a compensation signal (i.e., for respiration, cardiac, etc.), and a mechanism for subtracting the compensation signal from the uncompensated electrode location. The result is a corrected electrode location substantially free of respiration and cardiac artifacts. The motion compensation block includes a dynamic adaptation feature which accounts for changes in a patient's respiration patterns as well as intentional movements of the medical device to different locations within the patient's body. The system further includes an automatic compensation gain control which suppresses compensation when certain conditions, such as noise or sudden patch impedance changes, are detected.