Patent ID: 9066672
Filing Date: 2015-06-30
Classification: A61B

Abstract:
1. A method for obtaining one or more conductance measurements using an impedance device, the method comprising the steps of: introducing at least part of an impedance device into a mammalian luminal organ, the impedance device comprising an elongated body and a detector positioned along the elongated body; obtaining a first conductance measurement using the detector while the detector is surrounded by an outer sheath surrounding at least part of the impedance device, the first conductance measurement indicative of a fluid native to the mammalian luminal organ present within a lumen of the outer sheath; obtaining a second conductance measurement using the detector while the detector is surrounded by the outer sheath, the second conductance measurement indicative of a first injection of a first solution of a first compound through the lumen of the outer sheath; moving the impedance device and/or the outer sheath relative to one another so that the outer sheath no longer surrounds the detector; obtaining a third conductance measurement using the detector, the third conductance measurement indicative of the fluid native to the mammalian luminal organ; obtaining a fourth conductance measurement using the detector, the fourth conductance measurement indicative of a second injection of the first solution through the lumen of the outer sheath; and calculating a size parameter of the mammalian luminal organ based in part upon the third conductance measurement, the fourth conductance measurement, and a conductivity of the fluid native to the mammalian luminal organ determined in part from the first conductance measurement.