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Medical implantable system for reducing magnetic resonance effects

  • US 7,050,855 B2
  • Filed: 01/29/2002
  • Issued: 05/23/2006
  • Est. Priority Date: 01/29/2002
  • Status: Active Grant
First Claim
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1. An implantable medical system, comprising;

  • an operational control subsystem for controlling a therapy delivery component of the implantable medical system, wherein the therapy delivery component includes at least one therapy delivery lead;

    a magnetic sensor to measure a magnetic field surrounding the environment in which the system is located and provide a magnetic field strength value indicative of the magnitude of the magnetic field;

    at least one circuit coupled to the operational control subsystem and the magnetic sensor to receive the magnetic field strength value and compare the magnetic field strength value to a threshold value and output a control signal to the operational control system if the magnetic field strength value exceeds the threshold, wherein the threshold value is a predetermined value above which the environmental magnetic field is capable of adversely interfering with normal operation of the therapy delivery lead; and

    an adjustment component communicatively coupled with the operational control system, wherein the adjustment component controls a portion of the therapy delivery component if the operational control system receives the control signal.

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