Equalization Drive Electrode Selection for Catheter Noise Cancellation
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Solution Overview
Problem
Current electrophysiology data acquisition systems face challenges in accurately capturing and filtering electrophysiological signals due to localized noise interference from multiple catheters and procedural-related noise sources, which are not effectively addressed by existing noise reduction circuits.
Innovation Solution
An electrophysiology data acquisition system with multiple adjustable equalization drive circuits that allow selection of local equalization drive electrodes and noise reduction circuits for each catheter or group of catheters, providing localized noise cancellation and reference points, customizable based on catheter configuration and noise profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single common equalization drive circuit is used for all catheters, then the device complexity is reduced, but the noise cancellation effectiveness deteriorates due to localized noise interference from multiple catheters
Solution Approach 1:
The patent divides the single common equalization drive circuit into multiple separate equalization drive circuits, with each circuit dedicated to a specific catheter or group of catheters. This segmentation allows each circuit to independently address localized noise interference from its associated catheter(s), improving noise cancellation effectiveness without requiring a single complex centralized system.
Solution Approach 2:
The patent implements local equalization drive circuits that are specifically tailored to address noise interference at local locations where catheters are positioned. Each circuit can be independently adjusted to match the specific noise characteristics of its associated catheter, providing localized noise cancellation rather than a uniform approach across all catheters.
2Object-affected harmful factors
If multiple differentiated equalization drive circuits are implemented for each catheter, then the noise cancellation effectiveness is improved, but the device complexity increases
Solution Approach 1:
The patent designs multiple equalization drive circuits that can be selectively activated based on the number and configuration of catheters in use. The system provides a universal solution that can operate with one catheter or multiple catheters, allowing the complexity to scale with the application requirements rather than being fixed at a high level.
Solution Approach 2:
The patent implements a dynamic configuration where the number and arrangement of equalization drive circuits can be adjusted based on the specific procedural needs. The system can transition from a single circuit configuration to multiple circuit configurations as catheters are added or removed, allowing the device complexity to adapt to the actual operational requirements.
3Device complexity
If fixed equalization drive circuit configurations are used, then the device complexity is reduced, but the adaptability to different catheter configurations and noise profiles deteriorates
Solution Approach 1:
The patent implements dynamic equalization drive circuits that can be reconfigured based on the specific catheter configuration and noise profile detected during the procedure. The system can adjust the number, arrangement, and parameters of the equalization drive circuits to match the actual operational conditions, providing adaptability without requiring a completely fixed design.
Solution Approach 2:
The patent allows adjustment of key parameters of the equalization drive circuits, such as gain, frequency response, and electrode selection, to optimize noise cancellation for different catheter configurations and noise profiles. This parameter adjustability enables the system to adapt to various procedural conditions while maintaining a manageable device complexity.
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 signal accuracy by minimizing noise interference and reducing the need for aggressive signal processing, ensuring precise capture and display of physiological signals.
Implementation Method 1
an equalization drive circuit (7) including a noise reduction circuit (10) that cancels interference in the physiological signals by injecting current into the patient through the equalization drive electrode (37)
Data Source
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AI summary
An electrophysiology data acquisition system that receives physiological signals from at least one catheter includes an amplifier and at least one noise reduction circuit operatively connected to the amplifier and configured to cancel interference in the physiological signals from the catheter. A drive selection circuit is controllable to connect any one of two or more available electrodes to the noise reduction circuit such that the connected electrode becomes an equalization drive electrode for the catheter. An equalization control module is executable on a processor and configured to select the equalization drive electrode from the two or more available electrodes and to control the drive selection circuit to connect the selected equalization drive electrode to the noise reduction circuit.