Implantable Medical Device Conductive Communication Mode Switching
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Solution Overview
Problem
Implantable medical devices, particularly leadless pacemakers, face communication challenges due to noise interference from MRI systems, which can disrupt conductive communication and require switching to less energy-efficient RF communication, affecting device longevity and synchronization.
Innovation Solution
Implementing a method that allows leadless pacemakers to dynamically switch between normal and boosted conductive communication, using a timer or counter to adapt communication modes based on trigger events such as noise levels or arrhythmia detection, and incorporating RF communication as a backup to maintain efficient energy use and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conducted communication is used for implant-to-implant communication, then energy efficiency is improved, but communication reliability deteriorates under MRI noise interference
Solution Approach 1:
The system dynamically adjusts communication parameters by switching between normal and boosted conductive communication modes based on detected trigger events such as MRI noise interference. The controller monitors communication quality and adapts the communication mode in real-time, transitioning to boosted mode with higher energy pulses when interference is detected and returning to normal mode when interference ceases.
Solution Approach 2:
The system changes the energy parameter of conductive communication pulses from normal level to boosted level in response to detected trigger events. This parameter adjustment allows the system to overcome MRI noise interference by increasing pulse energy above the noise threshold while maintaining energy efficiency during normal operation.
2Reliability
If boosted conductive communication is used to overcome noise interference, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic monitoring of trigger events to determine when to switch between normal and boosted communication modes. Rather than continuously operating in boosted mode, the system periodically assesses communication conditions and activates boosted mode only when necessary, thereby maintaining reliability while minimizing energy consumption.
Solution Approach 2:
The controller continuously monitors for trigger events indicating noise interference and provides feedback to adjust communication mode accordingly. This feedback mechanism ensures that boosted communication is activated only when communication reliability is compromised by external interference, preventing unnecessary energy consumption during normal operating conditions.
3Object-affected harmful factors
If devices switch to MRI safe-mode during MRI exposure, then device safety is improved, but synchronization capability deteriorates
Solution Approach 1:
The system dynamically maintains synchronization capability during MRI exposure by switching to boosted conductive communication mode rather than entering a static safe-mode. The controller continuously monitors for trigger events and adapts communication parameters in real-time, allowing the devices to maintain coordinated operation even during MRI procedures through enhanced signal transmission.
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 communication reliability and energy efficiency by adapting conductive communication modes to mitigate noise interference, ensuring prolonged device longevity and continuous synchronization during MRI exposure.
Implementation Method 1
Conductive communication involves transmitting and receiving communication signals through patient tissue, typically using the same electrodes that are used for cardiac pacing and sensing
Implementation Method 2
RF communication, by contrast, involves using an antenna for transmitting and receiving RF communication signals
Data Source
AI summary
Systems, devices, and methods are disclosed herein, wherein a first implantable medical device (IMD) uses normal conductive communication to transmit message(s) intended for a second IMD, during a first period of time that a first trigger event is not detected. The first IMD, in response to detecting the first trigger event, starts a timer or counter and transitions to using boosted conductive communication to transmit one or more messages intended for the second IMD during a second period of time. In response to the first IMD either detecting a second trigger event, or detecting based on the timer or counter that a specified amount of time or cardiac cycles elapsed since the timer or counter was started, the first IMD transitions back to using normal conductive communication to transmit one or more messages intended for the second IMD during a third period of time. Other embodiments are also disclosed herein.