Pacer demand-rate test mode control
Method and means for receiving parameter control data in an implantable heart pacer
Implantable externally programmable microprocessor-controlled tissue stimulator
Implantable cardiac stimulator with automatic gain control
Dual chamber pacemaker with adjustable blanking and V-A extension
Low cost implantable medical device
Activation techniques for implantable medical device
Magnetic field sensor Patent #: 5438990
ApplicationNo. 475491 filed on 06/07/1995
US Classes:607/30, Remotely changing, (e.g., programming, pacer) parameters or operation324/207.21, Magnetoresistive607/59Control signal storage (e.g., programming)
ExaminersPrimary: Kamm, William E.
Attorney, Agent or Firm
International ClassA61N 001/36
AbstractAn implantable medical device includes a giant magnetoresistance ratio (GMR) sensor is used to detect the presence of a magnet in order to command the device to enter a predetermined mode of operation. The GMR responds to a modulated magnetic field generated by the programming of a command transmitter apparatus for non-invasive programming or controlling of the implanted device. The implantable medical device also monitors for the presence of a steady magnetic field to place the implanted device in a known, safe mode.