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Position sensing system with integral location pad and position display

  • US 20030023161A1
  • Filed: 06/17/2002
  • Published: 01/30/2003
  • Est. Priority Date: 03/11/1999
  • Status: Active Grant
First Claim
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1. Apparatus for performing a medical procedure on a tissue within a body of a subject, comprising:

  • a wireless tag configured to be fixed to the tissue and comprising a first sensor coil;

    a second sensor coil, adapted to be fixed to a medical device for use in performing the procedure; and

    a processing and display unit, comprising;

    a plurality of radiator coils, which are adapted to generate electromagnetic fields in a vicinity of the tissue, thereby causing first and second currents to flow, respectively, in the first and second sensor coils;

    processing circuitry, adapted to receive first and second signals from the wireless tag and from the medical device, respectively, indicative of the first and second currents, and to process the signals so as to determine coordinates of the tag relative to the medical device;

    a display, coupled to be driven by the processing circuitry so as to present a visual indication to an operator of the medical device of an orientation of the device relative to the tag; and

    a case, containing the radiator coils, processing circuitry and display as an integral unit.

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