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US 2013/0096409 A1Published application
Device and methods for measuring and treating an anatomical structure
AssigneeACIST Medical Systems, Inc.
InventorsJason Fredrick Hiltner, William J. Taylor
Life of this patent
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Abstract
A sensor delivery device and methods of using the device are provided, wherein the sensor delivery device includes a sensor that is adapted to obtain a measurement that can be used to calculate cross-sectional area of a surrounding anatomical structure. In certain cases, the sensor is an electrode arrangement, wherein the electrode arrangement generates a current and measures voltage resulting from the current. The voltage measurement is then used to calculate conductivity of fluid in the surrounding anatomical structure and thus cross-sectional area.
Claims61
An intravascular sensor delivery device comprising:
- a distal sleeve having a guidewire lumen for slidably receiving a medical guidewire;
- a first sensor coupled to the distal sleeve, wherein the first sensor is adapted to measure blood pressure and generate a signal representative of the blood pressure;
- a second sensor coupled to the distal sleeve, wherein the second sensor is adapted to measure cross-sectional area of a surrounding anatomical structure and generate a signal representative of the cross-sectional area;
- a proximal portion coupled to the distal sleeve, the proximal portion comprising a communication channel, wherein the communication channel communicates the signal from the first sensor and the signal from the second sensor to a location outside of the patient.
1 more element
An intravascular measuring system comprising:
- a guidewire;
- an intravascular sensor delivery device that has a lumen that slidably receives the guidewire, wherein the sensor delivery device includes a first sensor and a second sensor, wherein the first sensor is adapted to measure blood pressure and generate a first signal representative of the blood pressure and wherein the second sensor is adapted to measure cross-sectional area of a surrounding anatomical structure and generate a second signal representative of the cross-sectional area;
- an injection device that is adapted to inject a fluid with a known conductivity to the anatomical structure;
- and
- a processor that is adapted to receive the first signal from the first sensor and the second signal from the second sensor.
2 more elements
A method of treating an anatomical structure in patient, the method comprising:
- (a) providing a sensor delivery device, wherein the sensor delivery device includes:
- (i) a distal sleeve having a guidewire lumen for slidably receiving a medical guidewire;
- (ii) a first sensor coupled to the distal sleeve, wherein the first sensor is adapted to measure blood pressure;
- and
- (iii) a second sensor coupled to the distal sleeve, wherein the second sensor is adapted to measure cross-sectional area of the anatomical structure;
- (b) positioning the sensor delivery device within the anatomical structure;
- (c) using the first sensor to obtain one or more blood pressure measurements;
- (d) using the blood pressure measurements to calculate an FFR value;
- (e) electing to use a stent when the FFR value is lower than a threshold value;
- (f) using the second sensor to obtain one or more cross-sectional area measurements;
- (g) using the cross-sectional area measurements to select a stent size.
8 more elements
A method of treating an anatomical structure in patient, the method comprising:
- (a) providing a sensor delivery device, wherein the sensor delivery device includes:
- (i) a distal sleeve having a guidewire lumen for slidably receiving a medical guidewire;
- (ii) a first sensor coupled to the distal sleeve, wherein the first sensor is adapted to measure blood pressure;
- and
- (iii) a second sensor coupled to the distal sleeve, wherein the second sensor is adapted to measure conductivity of fluid in the anatomical structure;
- (b) positioning the sensor delivery device within the anatomical structure;
- (c) using the first sensor to obtain blood pressure measurements;
- (d) using the blood pressure measurements to calculate an FFR value;
- (e) electing to use a stent when the FFR value is lower than a threshold value;
- (f) using the second sensor to obtain one or more fluid conductivity measurements;
- (g) using the fluid conductivity measurements to calculate a cross-sectional area of the anatomical structure;
- and
- (h) using the cross-sectional area to select a stent size.
10 more elements
A method of treating an anatomical structure in patient, the method comprising:
- (a) providing a sensor delivery device, wherein the sensor delivery device includes:
- (i) a distal sleeve having a guidewire lumen for slidably receiving a medical guidewire;
- (ii) a first sensor coupled to the distal sleeve, wherein the first sensor is adapted to measure blood pressure;
- and
- (iii) a second sensor coupled to the distal sleeve, wherein the second sensor is adapted to measure conductivity of fluid in the anatomical structure;
- (b) positioning the sensor delivery device within the anatomical structure;
- (c) using the first sensor to obtain one or more blood pressure measurements;
- (d) using the blood pressure measurements to calculate an initial FFR value;
- (e) using the second sensor to obtain one or more fluid conductivity measurements;
- (f) using the fluid conductivity measurements to calculate a corrected FFR value.
7 more elements
A method of determining cross-sectional area in an anatomical structure of a patient, the method comprising:
- (a) providing a sensor delivery device, wherein the sensor delivery device includes a distal sleeve having a guidewire lumen for slidably receiving a medical guidewire and a sensor coupled to the distal sleeve, wherein the sensor is adapted to measure fluid conductivity;
- (b) positioning the sensor delivery device within the anatomical structure;
- (c) using the sensor to measure conductivity for the patient's blood;
- (d) administering fluid with a known conductivity to the anatomical structure;
- (e) using the sensor to measure conductivity for the fluid;
- (f) using the measured blood conductivity and the measured fluid conductivity to calculate a cross-sectional area of the anatomical structure.
3 more elements
A method of determining cross-sectional area in an anatomical structure of a patient, the method comprising:
- (a) providing a sensor delivery device, wherein the sensor delivery device includes a distal sleeve having a guidewire lumen for slidably receiving a medical guidewire and a sensor coupled to the distal sleeve, wherein the sensor is adapted to measure fluid conductivity of a surrounding anatomical structure;
- (b) positioning the sensor delivery device within the anatomical structure;
- (c) administering a first fluid with a known conductivity to the anatomical structure;
- (d) using the sensor to measure a first conductivity for the first fluid;
- (e) administering a second fluid with a known conductivity to the anatomical structure, wherein the known conductivity of the first fluid is different than the known conductivity of the second fluid;
- (f) using the sensor to measure a second conductivity for the second fluid;
- (g) using the first conductivity and the second conductivity to calculate a cross-sectional area of the anatomical structure.
4 more elements
Dependencies are inferred from the claim text.