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Method of forming an electromagnetic sensing coil in a medical instrument

  • US 8,549,732 B2
  • Filed: 07/01/2011
  • Issued: 10/08/2013
  • Est. Priority Date: 10/17/2003
  • Status: Active Grant
First Claim
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1. For a surgical navigation system, a method of forming an electromagnetic sensing coil in a medical instrument, comprising:

  • forming an elongated cylinder of the medical instrument having a distal end;

    forming a coil about the elongated cylinder;

    electrically isolating the coil from the elongated cylinder; and

    covering a portion of the elongated cylinder and the coil with a first layer of a material without covering the distal end, said first layer being displaced a first distance from the distal end to protect the first layer from damage when the distal end touches a surface,wherein the coil is substantially electrically isolated from an environment.

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