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Method and apparatus for determining the position of catheters, tubes, placement guidewires and implantable ports within biological tissue

  • US 5,513,637 A
  • Filed: 12/21/1994
  • Issued: 05/07/1996
  • Est. Priority Date: 09/29/1992
  • Status: Expired due to Fees
First Claim
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1. A catheter and guidewire full-length position locator apparatus comprising:

  • a catheter comprising an elongated tube with a proximal end and a distal end and a first terminal section at said proximal end, said catheter having a first antenna encapsulated in said elongated tube and said first terminal section, said first antenna extending from said distal end of said elongated tube to a first contact on said first terminal section;

    a guidewire passing through said catheter, said guidewire having a proximal end and a distal end and comprising a second and third antenna encapsulated therein and a second terminal section located at said proximal end of said guidewire, said second antenna extending from said distal end of said guidewire to a second contact on said second terminal section, said third antenna extending from said distal end of said guidewire to a third contact on said second terminal section, said third antenna having a conductor in electrical communication therewith at said distal end of said guidewire, said third antenna having an insulator formed thereon covering said third antenna, said insulator connected to a fourth contact on said second terminal section; and

    a transmitter/detector comprising an RF radiation source and a RF radiation receiver, said RF radiation source in electrical communication with a fourth antenna, said RF radiation receiver selectively capable of electrical communication with said first contact on said first terminal section, said second contact on said second terminal section, said third contact on said second terminal section or said fourth contact on said second terminal section.

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