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Device for locating a port on a medical implant

  • US 5,758,667 A
  • Filed: 01/05/1996
  • Issued: 06/02/1998
  • Est. Priority Date: 01/26/1995
  • Status: Expired due to Fees
First Claim
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1. A device, for use with a medical implant having a port, for locating the port after implantation of said medical implant in a patient, said device comprising:

  • a magnetic field source adapted to be disposed in a patient in whom said medical implant is implanted at a known spatial position relative to said port;

    a fixture plate movable across the skin of the patient, said fixture plate having a hemispherical recess therein; and

    indicator means, movably mounted in said fixture plate and positionally responsive to a magnetic field from said magnetic field source, for providing an extracorporeally perceptible indication when said fixture plate is in a defined spatial relationship to said magnetic field source for extracorporeally identifying a position of said port in said patient, said indicator means comprising an axially magnetized spherical body mounted in said recess for substantially free rotation therein, said axially magnetized spherical body having a marking thereon identifying the position of said spherical body relative to said fixture plate.

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