Conductive Communication Vector Selection for IMDs
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Solution Overview
Problem
Conductive communication between external devices and implantable medical devices (IMDs) is often hindered by changes in the relative orientation and position of IMDs due to physiological and physical variables, leading to suboptimal communication quality, especially when multiple IMDs are involved, resulting in time-consuming and costly repositioning of skin electrodes and potential compromises in patient monitoring and therapeutic efficacy.
Innovation Solution
A method and device configuration that utilize at least three electrodes to perform conductive communication using multiple conductive communication vectors, with a controller identifying a preferred vector based on patient-specific information such as posture, activity level, impedance measurements, and ECG/EGM signals to optimize communication quality, and switching between vectors as needed to maintain effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If skin electrodes are repositioned to maintain good conductive communication signal quality, then communication quality is improved, but time consumption and operational complexity increase
Solution Approach 1:
The system dynamically selects communication vectors based on real-time detection of patient physiological states (such as posture changes, respiration phase, or cardiac cycle). Instead of statically fixing electrode positions, the controller adapts the communication vector selection to match changing physiological conditions, thereby maintaining optimal signal quality without manual repositioning.
Solution Approach 2:
The system changes the parameter of communication vector selection based on detected physiological state parameters. By monitoring physiological state and selecting appropriate communication vectors from multiple available vectors, the system adapts to physiological changes (posture, respiration, cardiac cycle) to maintain communication quality without physical electrode repositioning.
2Adaptability or versatility
If multiple conductive communication vectors are implemented with dynamic selection, then adaptability to physiological changes is improved, but device complexity increases
Solution Approach 1:
The system segments the communication function into multiple independent vectors, each utilizing different combinations of available electrodes. This segmentation allows the controller to select appropriate vectors based on physiological state without requiring complex hardware changes, as each vector represents a discrete, manageable communication pathway.
Solution Approach 2:
The system makes the electrode array multi-functional by enabling multiple communication vectors to be formed from the same set of electrodes. Instead of requiring dedicated electrodes for each vector, the same electrodes serve multiple communication functions through different vector configurations, reducing overall system complexity while enhancing adaptability.
3Adaptability or versatility
If skin electrodes are manually repositioned to communicate with multiple IMDs, then communication coverage is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs self-adjustment by automatically detecting physiological state and selecting appropriate communication vectors without requiring manual intervention. The controller autonomously manages vector selection to maintain communication with multiple IMDs, eliminating the need for operators to physically reposition electrodes during patient monitoring or therapy delivery.
4Device complexity
If conductive communication is performed without considering physiological state, then device complexity is reduced, but communication reliability deteriorates
Solution Approach 1:
The system incorporates feedback by detecting patient physiological state (such as posture, respiration phase, or cardiac cycle) and using this information to select appropriate communication vectors. This feedback loop ensures that communication quality is maintained under varying physiological conditions by adapting vector selection to match current patient state.
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
This approach enhances conductive communication quality between external devices and IMDs, reduces the need for frequent electrode repositioning, and maintains effective patient monitoring and therapeutic efficacy by adaptively adjusting to changing physiological and physical states.
Implementation Method 1
Communication between an external device and one or more IMDs (e.g., LPs) may be facilitated by conductive communication via patient tissue, whereby skin electrodes (that are part of or coupled to the external device) are attached to skin of a patient within which (i.e., in whom) one or more IMDs is/are implanted, and the skin electrodes are used to transmit information to and/or receive information from the IMD(s) via conduction through body tissue of the patient.
Data Source
AI summary
Devices and methods for improving conductive communication are described herein. One of the devices involved in the conductive communication can be an external device while the other device is an IMD, or both of the devices can be IMDs. In certain embodiments, a preferred conductive communication vector for use is identified based on obtained information indicative of the at least one of a physical or physiologic state of the patient within which an IMD is implanted.