Devices and systems for obtaining impedance data

Abstract

Devices and systems to measure luminal organ parameters using impedance. In at least one embodiment of an impedance device of the present disclosure, the impedance device comprises an elongated body having a distal body end and a pair of detection electrodes positioned in between a pair of excitation electrodes located at or near the distal body end, the pair of detection electrodes configured to obtain one or more conductance values within a mammalian luminal organ within a field generated by the pair of excitation electrodes, wherein a measured parameter of the mammalian luminal organ can be calculated based in part upon the one or more conductance values obtained by the device and a known distance between the pair of detection electrodes.

1 . An impedance device, comprising:
 a pair of detection electrodes positioned in between a pair of excitation electrodes located along the elongated body, the pair of detection electrodes configured to obtain one or more conductance values within a mammalian luminal organ within a field generated by the pair of excitation electrodes, wherein a measured parameter comprising at least one of a cross-sectional area, a circumference, and a diameter of the mammalian luminal organ can be calculated based in part upon the one or more conductance values.   
     
     
         2 . The impedance device of  claim 1 , wherein a distance between the pair of detection electrodes is known, and wherein the measured parameter is calculated based in part upon the distance between the pair of detection electrodes. 
     
     
         3 . The impedance device of  claim 1 , wherein a distance between one of the pair of excitation electrodes and one of the pair of detection electrodes is between 4 mm and 7 mm, inclusive. 
     
     
         4 . The impedance device of  claim 1 , wherein the distance between the pair of detection electrodes is between 0.5 mm and 1 mm, inclusive. 
     
     
         5 . The impedance device of  claim 1 , wherein the elongated body is selected from the group consisting of an elongated wire and an elongated catheter. 
     
     
         6 . The impedance device of  claim 1 , further comprising:
 a pressure sensor configured to detect a pressure within the mammalian luminal organ when at least part of the impedance device is positioned therein.   
     
     
         7 . The impedance device of  claim 1 , further comprising:
 a data acquisition and processing system in communication with the impedance device and operable to receive and process data from the pair of detection electrodes to calculate the measured parameter.   
     
     
         8 . An impedance device, comprising:
 an elongated body having a distal body end; and   a pair of detection electrodes positioned in between a pair of excitation electrodes located along the elongated body, the pair of detection electrodes configured to obtain one or more conductance values within a mammalian luminal organ within a field generated by the pair of excitation electrodes;   wherein a measured parameter comprising at least one of a cross-sectional area, a circumference, and a diameter of the mammalian luminal organ can be calculated based in part upon the one or more conductance values obtained by the device and a known distance between the pair of detection electrodes.   
     
     
         9 . The impedance device of  claim 8 , wherein a distance between the pair of detection electrodes is known, wherein the measured parameter comprises the cross-sectional area of the mammalian luminal organ, and wherein the cross-sectional area is calculated based in part upon the distance between the pair of detection electrodes. 
     
     
         10 . The impedance device of  claim 8 , wherein a distance between one of the pair of excitation electrodes and one of the pair of detection electrodes is between 4 mm and 7 mm, inclusive. 
     
     
         11 . The impedance device of  claim 8 , wherein the elongated body is selected from the group consisting of an elongated wire and an elongated catheter. 
     
     
         12 . The impedance device of  claim 8 , further comprising:
 a pressure sensor configured to detect a pressure within the mammalian luminal organ when at least part of the impedance device is positioned therein.   
     
     
         13 . An impedance system, comprising:
 an impedance device, comprising:
 an elongated body having a distal body end, and 
 a pair of detection electrodes positioned in between a pair of excitation electrodes located along the elongated body, the pair of detection electrodes configured to obtain one or more conductance values within a mammalian luminal organ within a field generated by the pair of excitation electrodes, wherein a distance between one of the pair of excitation electrodes and one of the pair of detection electrodes is between 4 mm and 7 mm, inclusive; and 
   a data acquisition and processing system in communication with the impedance device and operable to receive and process data from the pair of detection electrodes to calculate a measured parameter comprising at least one of a cross-sectional area, a circumference, and a diameter of the mammalian luminal organ;   wherein the measured parameter can be calculated based in part upon the one or more conductance values obtained by the impedance device and a known distance between the pair of detection electrodes.   
     
     
         14 . The impedance system of  claim 13 , wherein a distance between the pair of detection electrodes is known, wherein the measured parameter comprises the cross-sectional area of the mammalian luminal organ, and wherein the cross-sectional area is calculated based in part upon the distance between the pair of detection electrodes. 
     
     
         15 . The impedance system of  claim 13 , wherein the distance between the pair of detection electrodes is between 0.5 mm and 1 mm, inclusive. 
     
     
         16 . The impedance system of  claim 13 , further comprising:
 a pressure sensor configured to detect a pressure within the mammalian luminal organ when at least part of the impedance device is positioned therein.   
     
     
         17 . The impedance system of  claim 13 , further comprising:
 a suction/infusion port in communication with a lumen of the elongated body and configured so that a fluid can be injected through the lumen and out of the suction/infusion port.   
     
     
         18 . The impedance system of  claim 13 , wherein the impedance device further comprises a balloon coupled to the elongated body, the balloon configured for inflation within the mammalian luminal organ when at least part of the impedance device is positioned therein. 
     
     
         19 . The impedance system of  claim 18 , wherein the pair of excitation electrodes and the pair of detection electrodes are positioned inside of the balloon, and wherein the measured parameter is indicative of the inside of the balloon. 
     
     
         20 . The impedance system of  claim 18 , wherein the balloon is configured to breakup materials causing a stenosis within the mammalian luminal organ.