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Bioimpedance-assisted placement of a medical device

  • US 8,801,693 B2
  • Filed: 10/27/2011
  • Issued: 08/12/2014
  • Est. Priority Date: 10/29/2010
  • Status: Active Grant
First Claim
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1. A method for guiding a catheter within a vasculature of a patient, the method comprising:

  • introducing the catheter into a vessel of the patient, the catheter defining a lumen through which fluids can be infused into the vasculature of the patient;

    advancing the catheter toward a target destination within the vasculature;

    calculating at least a first impedance value based on intravascular detection of at least one electrical property related to a first tissue surface of the vessel, the at least one electrical property detected across at least one electrode pair associated with the catheter disposed proximate to the first tissue surface;

    advancing the catheter so that the electrode pair is proximate a second tissue surface in the vessel;

    calculating a second impedance value based on intravascular detection across the at least one electrode pair of at least one electrical property related to a second tissue surface of the vessel; and

    determining the proximity of the distal end of the catheter to the target destination from a relative variance between the first impedance value and the second impedance value.

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