Device, system and method for measuring cross-sectional areas in luminal organs
First Claim
1. A method for measuring a cross-sectional area of a targeted treatment site, the method comprising the steps of:
- introducing a device into a treatment site;
injecting a volume of a first solution having a first concentration and a first conductivity and injecting a volume of a second solution having a second concentration and a second conductivity at a first position of the treatment site;
measuring a first treatment site conductance at the first position of the treatment site;
moving the device to a second position of the treatment site;
injecting a volume of the first solution having a first concentration and a first conductivity and injecting a volume of the second solution having a second concentration and a second conductivity at the second position of the treatment site;
measuring a second treatment site conductance at the second position of the treatment site;
calculating cross-sectional areas of the first position and the second position of the treatment site; and
calculating a total conductance for a distance between the first position and the second position of the treatment site.
3 Assignments
0 Petitions
Accused Products
Abstract
The disclosure of the present application provides for a system for measuring cross-sectional areas and pressure gradients in luminal organs. The disclosure of the present application also provides a method and apparatus for measuring cross-sectional areas and pressure gradients in luminal organs, such as, for example, blood vessels, heart valves, and other visceral hollow organs. In at least one embodiment, a method for measuring a cross-sectional area of a targeted treatment site comprises the steps of introducing a device, injecting two solutions, measuring a first conductance, moving the device, injecting two solutions, measuring a second conductance, and calculating cross-sectional areas based upon the two conductance measurements.
133 Citations
81 Claims
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1. A method for measuring a cross-sectional area of a targeted treatment site, the method comprising the steps of:
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introducing a device into a treatment site; injecting a volume of a first solution having a first concentration and a first conductivity and injecting a volume of a second solution having a second concentration and a second conductivity at a first position of the treatment site; measuring a first treatment site conductance at the first position of the treatment site; moving the device to a second position of the treatment site; injecting a volume of the first solution having a first concentration and a first conductivity and injecting a volume of the second solution having a second concentration and a second conductivity at the second position of the treatment site; measuring a second treatment site conductance at the second position of the treatment site; calculating cross-sectional areas of the first position and the second position of the treatment site; and calculating a total conductance for a distance between the first position and the second position of the treatment site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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67. A method for measuring a cross-sectional area of a targeted treatment site, the method comprising the steps of:
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introducing a device into a treatment site; injecting a volume of a first solution having a first concentration and a first conductivity and injecting a volume of a second solution having a second concentration and a second conductivity at a first position of the treatment site; measuring a first treatment site conductance at the first position of the treatment site; pulling back the device to a second position of the treatment site while injecting a volume of the second solution, wherein the second position is located proximally relative to the first position; injecting a volume of the first solution having a first concentration and a first conductivity at the second position of the treatment site; measuring a second treatment site conductance at the second position of the treatment site; calculating cross-sectional areas of the first position and the second position of the treatment site based in part upon the first treatment site conductance, the second treatment site conductance, the first conductivity of the first solution, and the second conductivity of the second solution; and calculating a total conductance for a distance between the first position and the second position of the treatment site. - View Dependent Claims (68, 69, 70, 71, 72, 73, 74, 75, 76)
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77. A method for measuring a cross-sectional area of a targeted treatment site, the method comprising the steps of:
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introducing a device into a treatment site; injecting a volume of a first solution having a first concentration and a first conductivity at a first position of the treatment site; measuring a first conductance at the first position of the treatment site; injecting a volume of a second solution having a second concentration and a second conductivity at a first position of the treatment site; measuring a second conductance at the first position of the treatment site; moving the device to a second position of the treatment site; injecting a volume of the first solution having a first concentration and a first conductivity at the second position of the treatment site; measuring a third conductance at the second position of the treatment site; injecting a volume of the second solution having a second concentration and a second conductivity at the second position of the treatment site; measuring a fourth conductance at the second position of the treatment site; calculating cross-sectional areas of the first position and the second position of the treatment site based in part from the first conductance, the second conductance, the third conductance, and the fourth conductance; and calculating a total conductance for a distance between the first position and the second position of the treatment site.
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78. A method for constructing a profile of a targeted treatment site, the method comprising the steps of:
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introducing a device into a treatment site; injecting a volume of a first solution having a first concentration and a first conductivity and injecting a volume of a second solution having a second concentration and a second conductivity at a first position of the treatment site; measuring a first treatment site conductance at the first position of the treatment site; moving the device to a second position of the treatment site; injecting a volume of the first solution having a first concentration and a first conductivity and injecting a volume of the second solution having a second concentration and a second conductivity at the second position of the treatment site; measuring a second treatment site conductance at the second position of the treatment site; calculating cross-sectional areas of the first position and the second position of the treatment site; calculating a total conductance for a distance between the first position and the second position of the treatment site; and constructing a profile of the treatment site based upon the cross-sectional areas of the first position and the second position of the treatment site. - View Dependent Claims (79, 80)
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81. A method for implanting a stent to a targeted treatment site, the method comprising the steps of:
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introducing a device into a treatment site; injecting a volume of a first solution having a first concentration and a first conductivity and injecting a volume of a second solution having a second concentration and a second conductivity at a first position of the treatment site; measuring a first treatment site conductance at the first position of the treatment site; moving the device to a second position of the treatment site; injecting a volume of the first solution having a first concentration and a first conductivity and injecting a volume of the second solution having a second concentration and a second conductivity at the second position of the treatment site; measuring a second treatment site conductance at the second position of the treatment site; calculating cross-sectional areas of the first position and the second position of the treatment site; calculating a total conductance for a distance between the first position and the second position of the treatment site; selecting an appropriately-sized stent based on a cross-sectional area of the treatment site; and implanting the stent into the treatment site.
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Specification