Azimuth adjustment device, system and method for measuring vibration of medical device

Abstract

The invention relates to a direction adjusting device for measuring the vibration of a medical device in a static magnetic field and a time-varying gradient magnetic field. The direction adjusting device comprises a support device, and an elastic restraint device arranged on the support device, the support device includes three independent rotation planes, the three independent rotation planes can drive a measured medical device to rotate around three orthogonal directions as the axes in the space, and the elastic restraint device is used for fixing the measured medical device so that the measured medical device is restrained in the same rotation plane of the support device. The invention also relates to a test system and a test method by employing the direction adjusting device. According to the test system and the test method, the safety of mechanical vibration in the static magnetic field and the time-varying gradient magnetic field of the implanted medical device can be tested in advance, and the damage to users and the implanted medical device due to vibration during the usage of the implanted medical device in the static magnetic field and the time-varying gradient magnetic field is effectively prevented.

Description

technical field [0001] The present invention relates to the related technical field of medical devices, in particular to a test method and a test system for mechanical vibration safety of an implantable medical device (Implantable Medical Device, IMD) in a static magnetic field and a time-varying gradient magnetic field. Background technique [0002] Implantable medical devices usually have a conductive shell, and their internal circuits have structures such as inductive devices and communication coils. When these conductive objects are in a time-varying gradient magnetic field, eddy currents will be induced in the conductors; if the implantable medical device is still in a static magnetic field environment at this time, the magnetic moments generated by the eddy currents will interact with the static magnetic field, As a result, the implanted medical device vibrates. The following takes the magnetic field environment of Magnetic Resonance Imaging (MRI) as an example to ill...

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Problems solved by technology

As the strength of the static magnetic field and the rate of change of the gradient field increase, the vibration intensity will also increase, which not only poses a threat to the structure and function of the implantable medical device itself, but more importantly, poses a safety hazard to the life and health of the patient.

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