Devices, systems, and methods to measure parallel tissue conductance, luminal cross-sectional areas, fluid velocity, and/or determine plaque vulnerability using temperature
First Claim
1. A method to obtain conductance data within a luminal organ, the method comprising the steps of:
- operating a detection device at least partially positioned within a luminal organ at a first location to obtain a first fluid temperature measurement;
detecting a temperature change at the first location using the detection device, the temperature change indicative of an injection of a bolus of a solution having a known conductivity into the luminal organ; and
measuring multiple output conductances using at least two impedance electrodes of the detection device prior to dilution of the bolus at the first location at least until a threshold temperature is reached.
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Accused Products
Abstract
Devices, systems, and methods to measure parallel tissue conductance, luminal cross-sectional areas, fluid velocity, and/or determine plaque vulnerability using temperature. In at least one embodiment of a method to obtain parallel tissue conductance, the method comprises the steps of inserting at least part of a detection device into a luminal organ, applying current thereto, obtaining a native temperature measurement, injecting a solution of a known conductivity into the luminal organ, detecting a temperature change indicative of the fluid within the luminal organ, measuring an output conductance, and calculating a parallel tissue conductance based upon the output conductance and the conductivity of the injected solution.
58 Citations
20 Claims
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1. A method to obtain conductance data within a luminal organ, the method comprising the steps of:
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operating a detection device at least partially positioned within a luminal organ at a first location to obtain a first fluid temperature measurement; detecting a temperature change at the first location using the detection device, the temperature change indicative of an injection of a bolus of a solution having a known conductivity into the luminal organ; and measuring multiple output conductances using at least two impedance electrodes of the detection device prior to dilution of the bolus at the first location at least until a threshold temperature is reached. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device configured to obtain conductance data within a luminal organ, comprising:
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an elongated body having a longitudinal axis extending from a proximal end to a distal end; at least two electrodes located on the elongated body, the at least two electrodes configured to obtain conductance data within a luminal organ in the presence of a fluid; and a thermistor positioned along the longitudinal axis proximal to the at least two electrodes, the thermistor configured to obtain temperature data within the luminal organ; wherein the device is configured so that when a bolus of a solution having a known conductivity is injected into the luminal organ, a temperature change at a first location indicative of the bolus of the injected solution can be detected using the device prior to any dilution of the bolus at the first location, multiple output conductances in connection with the injected solution based upon the detected temperature change can be measured using the device prior to any dilution of the bolus and at least until the temperature within the luminal organ reaches a threshold temperature, and a parallel conductance at the first location based in part upon at least one output conductance of the multiple output conductances and the conductivity of the injected solution can be calculated. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A system configured to obtain conductance data within a luminal organ, comprising:
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a device, comprising; an elongated body having a longitudinal axis extending from a proximal end to a distal end; a detector located on the elongated body and configured to obtain conductance data within a luminal organ in the presence of a fluid; and a thermistor positioned along the longitudinal axis proximal to at least one electrode of at least two electrodes of the detector, the thermistor configured to obtain temperature data within the luminal organ; and a data acquisition and processing system operably coupled to the device and capable of (a) receiving the temperature data from the thermistor in connection with an injection of a bolus of a solution having a known conductivity, and (b) obtaining conductance data comprising multiple conductances from the detector while receiving the temperature data. - View Dependent Claims (20)
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Specification