Cardiac Mapping Catheter Reference Wires for Motion Artifact Removal
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Solution Overview
Problem
Existing cardiac mapping catheters face challenges in accurately identifying aberrant electrical activity and maintaining signal integrity due to motion-induced noise and artifacts during procedures, which can hinder precise ablation of cardiac tissue.
Innovation Solution
A catheter system with multi-ray sensing and coiled end effector configurations, incorporating a novel wiring configuration with artifact reduction features to filter out motion-induced noise and artifacts, ensuring accurate electrocardiogram signal processing and real-time position tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a catheter with sensing electrodes is used to monitor electrical signals in the cardiovascular system, then the ability to identify aberrant conductive tissue sites is improved, but motion-induced noise and artifacts are introduced that reduce signal accuracy
Solution Approach 1:
A reference wire is introduced as an intermediary element that does not contact cardiac tissue but instead picks up only the motion-induced noise and artifacts. This reference wire serves as a mediator to separate the harmful motion artifacts from the useful electrical signals, allowing the noise to be identified and removed through subtraction from the signals obtained by sensing electrodes that contact the tissue.
2Measurement precision
If sensing electrodes contact cardiac tissue to obtain electrical signals, then the precision of identifying aberrant electrical activity is improved, but the complexity of the catheter system increases
Solution Approach 1:
The catheter system is segmented into distinct functional components: sensing electrodes that contact tissue for signal acquisition, and a separate reference wire that does not contact tissue and is dedicated solely to capturing motion artifacts. This segmentation allows each component to perform its specific function independently, simplifying the overall system architecture while improving signal quality through the reference subtraction method.
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
Enhances the precision of cardiac mapping by reducing signal noise and artifacts, allowing for effective identification of aberrant electrical activity and precise ablation of cardiac tissue, thereby improving treatment outcomes.
Implementation Method 1
a first pair of wire segments coupled with the sensor, the first pair of wire segments extending along the length of the catheter, the wire segments of the first pair being configured to define a first capacitance
Data Source
AI summary
An apparatus includes a catheter, a sensor, a first pair of wire segments, an artifact reduction feature, and a correction module. The sensor is positioned at a distal end of the catheter and is configured to generate a sensor signal. The first pair of wire segments is coupled with the sensor and extends along the length of the catheter. The artifact reduction feature is positioned proximate to the sensor and includes a second pair of wire segments. The correction module is configured to subtract motion-induced artifacts from signals received from the first pair of wire segments, based on motion-induced artifacts from signals received from the second pair of wire segments, to thereby provide a corrected sensor signal.