Patent ID: 8082032
Filing Date: 2011-12-20
Classification: A61B,A61M

Abstract:
1. A method for measuring the cross-sectional area of a targeted treatment site, comprising: introducing an impedance device into a treatment site, the impedance device selected from the group consisting of an impedance catheter and an impedance wire; providing electrical current flow to the treatment site through the device; injecting a first solution of a first compound having a first conductivity into the treatment site; measuring a first conductance value at the treatment site using the device, the first conductance value indicative of a bolus of the first solution; injecting a second solution of a second compound having a second conductivity into the treatment site, wherein the second conductivity does not equal the first conductivity; measuring a second conductance value at the treatment site using the device, the second conductance value indicative of a bolus of the second solution; and calculating the cross-sectional area of the treatment site based on the first and second conductance values, the conductivities of the first and second solutions, and a known distance between two detection electrodes of the impedance device.