Implantable Device Multi-Electrode P-Wave Sensing
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Solution Overview
Problem
Existing implantable medical devices struggle to reliably monitor certain waveform features in physiological signals, such as the P-wave, especially when implanted outside the heart without leads extending into the heart, due to varying signal strengths and complexities.
Innovation Solution
An implantable medical device with multiple electrode poles arranged at different axial positions, allowing for the sensing of physiological signals using different pairs of electrode poles. The device includes a processing module that processes these signals to assess cardiac function, enhance specific waveform features, and detect abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the implantable medical device is implanted outside the heart without leads extending into the heart, then the device simplicity and ease of implantation are improved, but the ability to reliably detect certain waveform features such as P-wave is worsened
Solution Approach 1:
The device divides the sensing function into multiple independent electrode poles (at least three) arranged at different axial positions on the housing. Each electrode pole can be independently configured to sense different physiological signals, allowing the device to segment the detection task across multiple sensing vectors without requiring invasive leads into the heart chambers.
Solution Approach 2:
The patent transitions from traditional single-vector or bipolar sensing to multi-vector sensing by arranging electrode poles along the longitudinal axis of the device. This creates multiple sensing dimensions (different pairs of electrodes forming different vectors), enabling the device to capture physiological signals from multiple spatial perspectives simultaneously, thereby improving waveform feature detection without increasing invasiveness.
2Measurement precision
If multiple electrode poles are arranged at different axial positions to enhance waveform feature monitoring, then the diagnostic precision is improved, but the device complexity increases
Solution Approach 1:
The multiple electrode poles serve multiple functions: they can be paired in different combinations to create various sensing vectors for different waveform features (P-wave, QRS, T-wave). The same set of electrodes can be used for different measurement purposes by reconfiguring which electrodes form the active sensing pair, reducing the need for additional specialized electrodes for each function.
Solution Approach 2:
The patent combines multiple electrode poles into a single integrated housing structure, where the electrodes are arranged along the longitudinal axis and electrically coupled to a common can. This merging approach consolidates what could be separate components into a unified device, simplifying the overall structure while maintaining the capability for multiple sensing configurations.
3Reliability
If different pairs of electrode poles are used to sense physiological signals, then the reliability of detecting abnormal cardiac states is improved, but the signal processing complexity increases
Solution Approach 1:
The device automatically selects and switches between different electrode pairs and sensing vectors based on the physiological signal being monitored. The system self-manages the complexity by dynamically reconfiguring which electrodes are active for sensing, eliminating the need for manual intervention or complex external control to optimize signal detection for different cardiac conditions.
Solution Approach 2:
The electrode configuration is dynamic rather than static. The device can switch between different pairs of electrode poles depending on which waveform feature needs to be monitored (P-wave, QRS, T-wave). This dynamic reconfiguration allows the system to adapt to different monitoring needs without requiring a fixed complex architecture for all possible sensing scenarios simultaneously.
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
The device achieves improved diagnostic precision by enhancing specific waveform features, such as the P-wave, and allows for reliable monitoring of cardiac function, even when implanted outside the heart, thereby facilitating effective home monitoring systems.
Implementation Method 1
the electrode poles are brought into electrical contact with surrounding tissue in order to establish an electrical coupling to the tissue
Data Source
AI summary
An implantable medical device for sensing physiological signals comprises an arrangement of at least a first electrode pole, a second electrode pole and a third electrode pole, said arrangement of at least the first electrode pole, the second electrode pole and the third electrode pole being configured to sense physiological signals. A processing module is configured for processing physiological signals received via said arrangement of at least the first electrode pole, the second electrode pole and the third electrode pole. The processing module in particular is configured to process different physiological signals received by different pair of electrode poles of the arrangement of at least the first electrode pole, the second electrode pole and the third electrode pole and to assess a cardiac function based on the processing.