Selection of test vectors for MRI security testing for implantable medical device design

An implantable medical, test vector technology, applied in the field of evaluating the safety of implanted medical device design when it is subject to radio frequency or other interference

Pending Publication Date: 2022-07-08
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some examples, the additional RF energy may interfere with the operation of the IMD

Method used

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  • Selection of test vectors for MRI security testing for implantable medical device design
  • Selection of test vectors for MRI security testing for implantable medical device design
  • Selection of test vectors for MRI security testing for implantable medical device design

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0075]Example 1: A method comprising: generating, by processing circuitry of a computing system, a plurality of test vectors, each of the plurality of test vectors is a magnetic resonance imaging (MRI) safety test for an implantable medical treatment system A corresponding combination of values ​​of a plurality of parameters, the implantable medical treatment system includes an implantable medical device (IMD) electrically connected to one or more electrical leads, each of the one or more electrical leads comprising at least one electrode on a distal portion of the electrical lead, wherein the plurality of parameters include a patient body model, an MRI scan patient landmark position, a model of one or more electrical leads, one or more The path of each electrical lead within the patient, the type of MRI coil, the type of MRI excitation, and one or more locations of at least one electrode of the one or more electrical leads within the patient; the processing circuitry determine...

example 2

[0076] Example 2: The method of Example 1, wherein generating the plurality of test vectors comprises generating one or more test vectors having a first electrical lead size and a first electrode placement location for the implantable medical device, wherein the first electrical lead The size and first electrode placement maximizes the induced electrical power at the IMD.

example 3

[0077] Example 3: The method of any of Examples 1 and 2, wherein selecting the subset of test vectors from the plurality of test vectors based on electrical power levels and phase values ​​of the subset of test vectors comprises: selecting a first test from the plurality of test vectors vector, wherein the first test vector has the highest electrical power level of any test vector of the plurality of test vectors.

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Abstract

In some examples, a method includes generating a plurality of test vectors based on a combination of values of a plurality of parameters for a magnetic resonance imaging (MRI) security test for an implantable cardiac therapy system, determining an electrical power level and a phase value for each of the plurality of test vectors, determining a plurality of test vectors based on the electrical power levels and the phase values for the test vector subsets, and determining a plurality of test vectors based on the electrical power levels and the phase values for the test vector subsets. And selecting a test vector subset as to a confirmation that each test vector in the test vector subset affects at least one electrode of one or more intracardiac leads of an implantable pacemaker device of the implantable cardiac therapy system, and applying an MRI security test for each test vector in the test vector subset, to determine an amount of radio frequency (RF) energy entering the implantable pacemaker device.

Description

technical field [0001] The present disclosure relates to techniques for evaluating the safety of implantable medical device (IMD) designs when subjected to radio frequency or other interference. Background technique [0002] Various types of implantable medical devices (IMDs) have been used to implant to treat or monitor one or more conditions in a patient. Such IMDs may be suitable for monitoring or treating conditions related to the heart, muscles, nerves, brain, stomach, endocrine or other organs and their associated functions. Such IMDs may be associated with leads that position the electrodes at desired locations, or may be leadless, with the electrodes integrated with and / or attached to the device housing. These IMDs may have the ability to wirelessly transmit data to another device implanted in the patient, or to another instrument located outside the patient's body, or to both. [0003] In some examples, when a patient with an IMD implanted is in close proximity to...

Claims

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Application Information

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IPC IPC(8): A61N1/372
CPCA61N1/37241
Inventor J·D·爱德蒙森M·J·霍夫曼
Owner MEDTRONIC INC
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