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MRI compatible tachycardia lead

  • US 9,254,380 B2
  • Filed: 09/13/2010
  • Issued: 02/09/2016
  • Est. Priority Date: 10/19/2009
  • Status: Expired due to Fees
First Claim
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1. A medical device lead comprising:

  • a first connector configured to couple the lead to a pulse generator;

    an insulative lead body extending distally from the first connector;

    a first cable conductor extending distally from the first connector within the lead body and having a first segment having a proximal end coupled to the first connector, a second segment, and a third segment, the first cable conductor extending in a straight configuration within the lead body along each of the first, second, and third segments;

    a first defibrillation coil exposed at an outer surface of the medical device lead, the first defibrillation coil having a proximal end that is electrically connected to a distal end of the third segment of the first cable conductor; and

    a first high impedance coil connected in series to a second high impedance coil, a distal end of the first segment of the first cable conductor coupled to a proximal end of the first high impedance coil, a proximal end of the second segment of the first cable conductor coupled to a distal end of the first high impedance coil, a distal end of the second segment of the first cable conductor coupled to a proximal end of the second high impedance coil, and a distal end of the second high impedance coil coupled to a proximal end of the third segment of the first cable conductor, wherein each of the first segment of the first cable conductor, the first high impedance coil, the second segment of the first cable conductor, the second high impedance coil, the third segment of the first cable conductor, and the first defibrillation coil are respectively electrically connected to one another in series, wherein each of the first, second, and third segments of the first cable conductor has a respective length that is less than one quarter of a wavelength of a signal carried by the first cable conductor and each of the first high impedance coil and the second high impedance coil is insulated at the outer surface of the medical device lead and has an impedance greater than the first cable conductor.

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