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Lead condition assessment for an implantable medical device

  • US 8,190,258 B2
  • Filed: 07/07/2009
  • Issued: 05/29/2012
  • Est. Priority Date: 10/28/2005
  • Status: Expired due to Fees
First Claim
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1. A method for assessing a condition of a lead assembly coupled to an implantable medical device (IMD), the method comprising:

  • determining by an impedance unit of the IMD or an external unit in communication with the IMD a first impedance relative to a first electrode and a reference electrode;

    determining by the impedance unit of the IMD or the external unit in communication with the IMD a second impedance relative to a second electrode and the reference electrode;

    comparing by the impedance unit of the IMD or the external unit in communication with the IMD the first impedance to the second impedance to determine an impedance difference;

    determining by the impedance unit of the IMD or the external unit in communication with the IMD a position of the first electrode relative to the second electrode based on at least the impedance difference;

    determining a third impedance, the third impedance comprising the impedance relative to the first electrode and the second electrode;

    determining whether the impedance difference is outside a predetermined tolerance range;

    comparing the impedance difference to the third impedance; and

    identifying a source of a lead condition error based upon the comparing of the impedance difference to the third impedance, the source comprising at least one of the first electrode, the second electrode, and a physiological impedance.

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