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Methods for generating luminal organ profiles using impedance

  • US 9,445,743 B2
  • Filed: 08/26/2013
  • Issued: 09/20/2016
  • Est. Priority Date: 02/21/2003
  • Status: Expired due to Term
First Claim
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1. A method of creating a cross-sectional area profile of a targeted treatment site, the method comprising the steps of:

  • introducing an impedance device having at least two detection electrodes positioned equidistant between at least two excitation electrodes into a treatment site of a luminal organ at a first position, wherein a distance between the at least two detection electrodes and the at least two excitation electrodes is based on a vessel diameter;

    measuring a first conductance at the first position using the impedance device and at least two injections of solutions having different conductivities;

    moving the impedance device to a second position in the luminal organ;

    measuring a second conductance at the second position using the impedance device and the at least two injections of solutions having different conductivities;

    calculating a first position cross-sectional area using the first conductance and a second position cross-sectional area using the second conductance; and

    constructing the cross-sectional profile of the targeted treatment site based in part on the calculated first position cross-sectional area and the calculated second position cross-sectional area.

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