Implantable Device MRI Mode Selection via Statistical Analysis
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Solution Overview
Problem
Current implantable medical devices, such as pacemakers and defibrillators, face malfunctions when exposed to MRI devices due to electromagnetic fields, requiring patients to visit physicians for pre-examination adjustments, increasing burden and costs.
Innovation Solution
An implantable medical device with an analysis module that stores operation event data and selects from multiple program routines based on statistical analysis to adapt its operation when an MRI device is detected, ensuring reliable operation and minimizing malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the implantable medical device operates in a standard mode without MRI detection, then the device provides normal therapeutic stimulation, but the device may malfunction when exposed to MRI electromagnetic fields
Solution Approach 1:
The device performs preliminary MRI detection by sensing characteristic electromagnetic fields before entering the MRI environment. Based on the detection result, the device pre-adjusts its operating parameters (such as switching to MRI-compatible mode, adjusting impedance, or disabling certain functions) to prevent malfunction during the actual MRI exposure, thereby ensuring reliability without requiring post-detection adjustments
Solution Approach 2:
The device changes its operational parameters in response to detected MRI fields. The sensing device detects characteristic MRI electromagnetic fields, and the processing device adjusts operating parameters such as stimulation amplitude, frequency, or impedance to match MRI-compatible settings, transforming the device from a standard operating state to an MRI-safe state through parameter modification
2Reliability
If the patient visits a physician for pre-examination adjustments, then the device can be configured for MRI safety, but the patient burden and examination costs increase
Solution Approach 1:
The implantable medical device autonomously performs MRI detection and self-adjusts its operating parameters without requiring external physician intervention. The sensing device detects MRI electromagnetic fields, the processing device analyzes the detection data, and the device automatically switches to MRI-compatible operating modes, enabling the patient to undergo MRI examination after simple registration without time-consuming physician visits
Solution Approach 2:
The device accelerates the MRI safety preparation process by replacing the multi-step physician adjustment procedure with automated electromagnetic field detection and parameter adjustment. This dramatically reduces the time required for MRI preparation from what would traditionally require a physician visit to a streamlined automated process
3Adaptability or versatility
If the device uses multiple program routines for different operating modes, then the device can adapt to MRI conditions, but the device complexity increases
Solution Approach 1:
The device divides its operating modes into distinct program routines stored in program memory, with each routine optimized for specific conditions (standard mode, MRI mode, etc.). The processing device selects and executes the appropriate segmented routine based on MRI detection results, allowing adaptable operation while maintaining organized, manageable complexity through functional segmentation of the control software
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
Enables patients to undergo MRI examinations without pre-visit physician adjustments, reducing patient burden and costs by automatically switching to MRI-compatible modes, ensuring device reliability during MRI exposure.
Implementation Method 1
a sensing device for sensing a measurement quantity indicative of a presence of an MRI device
Data Source
AI summary
An implantable medical device comprises a sensing device for sensing a measurement quantity indicative of a presence of an MRI device, a processing device for controlling operation of the implantable medical device and for identifying a presence of an MRI device based on measurement values obtained from the sensing device; and a program memory. An analysis module is configured to store information concerning a multiplicity of events relating to operation of the implantable medical device. The program memory is configured to store at least two program routines for operating the implantable medical device in case of a presence of an MRI device. The processing device is configured, for controlling operation of the implantable medical device in the presence of an MRI device, to select one of said at least two program routines based on a statistical analysis of information concerning a predefined number of events of said multiplicity of events.