Methods for generating luminal organ profiles using impedance
First Claim
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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Abstract
Methods to generate luminal organ profiles using impedance. One embodiment of such a method comprises the steps of introducing an impedance device having at least two detection electrodes positioned in between at least two excitation electrodes into a treatment site of a luminal organ at a first position, measuring a first treatment site 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 treatment site 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 treatment site conductance and a second position cross-sectional area using the second treatment site conductance, and constructing a profile of the treatment site.
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Citations
32 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of creating a cross-sectional area profile of a targeted treatment site, the method comprising the steps of:
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introducing an impedance device into a treatment site of a luminal organ at a first position, the impedance device comprising; at least two detection electrodes positioned between at least two excitation electrodes; a first pressure sensor proximal to a most proximal excitation electrode; and a second pressure sensor distal to a most distal excitation electrode; 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; measuring a first pressure gradient with the first pressure sensor and a second pressure gradient with the second pressure sensor; 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 (i) the calculated first position cross-sectional area, (ii) the calculated second position cross-sectional area, (iii) the first pressure gradient, and (iv) the second pressure gradient. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of creating a cross-sectional area profile of a targeted treatment site, the method comprising the steps of:
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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 first detection electrode of the at least two detection electrodes is spaced 1 mm apart from a second detection electrode of the at least two detection electrodes; 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 cross-sectional area and the calculated second position cross-sectional area. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification