Detection of strong static magnetic fields and MRI examination safekeeping for an implantable cardiac prosthesis
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United States of America Patent
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Aug 26, 2014
Grant Date -
Feb 6, 2014
app pub date -
Oct 8, 2013
filing date -
Jan 9, 2009
priority date (Note) -
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Abstract
An implantable medical device detects a strong static magnetic field associated with an MRI imaging instrument and operates in a safekeeping operating mode. The device includes an electronic circuit for the detection/stimulation of a cardiac activity, a weak field sensor detecting the presence of a first magnetic field of a permanent magnet being located in proximity to the device, a strong field sensor detecting the presence of a second magnetic field of an MRI imaging instrument during the course of an MRI examination.
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