Systems and methods for measuring pulse wave velocity with an intravascular device
First Claim
1. A method of measuring the velocity of anatomical pulse waves propagating within a body lumen, comprising:
- collecting data from a first anatomical pulse wave with an intravascular device at a first location within a body lumen, wherein the intravascular device is located within the body lumen, and wherein the anatomical pulse wave data collected at the first location comprises image data of an inner wall of the body lumen at the first location;
collecting data from a second anatomical pulse wave with the intravascular device at a second location within the body lumen, wherein the intravascular device is located within the body lumen, and wherein the anatomical pulse wave data collected at the second location comprises image data of the inner wall of the body lumen at the second location;
wherein the anatomical pulse wave data collected at the first and second locations are collected upon the occurrence of trigger points; and
calculating the velocity of anatomical pulse waves in the region between the first and second locations with the anatomical pulse wave data collected at the first and second locations, wherein the velocity of the anatomical pulse waves are calculated based, at least in part, on the difference in time durations between the occurrence of the first trigger point and the collection of anatomical pulse wave data at the first location and the occurrence of the second trigger point and the collection of anatomical pulse wave data at the second location;
wherein the anatomical pulse wave data collected at the first location and the anatomical pulse wave data collected at the second location are collected from different anatomical pulse waves.
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Abstract
The systems and methods described herein allow measurement of the velocity of a pulse wave propagating within a body lumen using an intravascular elongate medical device. The elongate medical device can include a data collection device configured to collect pulse wave data at a location within the lumen. The data collection device is communicatively coupled with a velocity measurement system and configured to output the collected data to the velocity measurement system. The velocity measurement system is configured to calculate the velocity of the pulse wave based on the collected data. The velocity of a pulse wave over a region of the lumen can be used for tissue characterization, diagnosis and the like.
32 Citations
37 Claims
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1. A method of measuring the velocity of anatomical pulse waves propagating within a body lumen, comprising:
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collecting data from a first anatomical pulse wave with an intravascular device at a first location within a body lumen, wherein the intravascular device is located within the body lumen, and wherein the anatomical pulse wave data collected at the first location comprises image data of an inner wall of the body lumen at the first location; collecting data from a second anatomical pulse wave with the intravascular device at a second location within the body lumen, wherein the intravascular device is located within the body lumen, and wherein the anatomical pulse wave data collected at the second location comprises image data of the inner wall of the body lumen at the second location; wherein the anatomical pulse wave data collected at the first and second locations are collected upon the occurrence of trigger points; and calculating the velocity of anatomical pulse waves in the region between the first and second locations with the anatomical pulse wave data collected at the first and second locations, wherein the velocity of the anatomical pulse waves are calculated based, at least in part, on the difference in time durations between the occurrence of the first trigger point and the collection of anatomical pulse wave data at the first location and the occurrence of the second trigger point and the collection of anatomical pulse wave data at the second location; wherein the anatomical pulse wave data collected at the first location and the anatomical pulse wave data collected at the second location are collected from different anatomical pulse waves. - 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)
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24. A medical system for measuring the velocity of anatomical pulse waves propagating within a body lumen, comprising:
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an elongate medical device configured for insertion into the body lumen and comprising a data collection device configured to collect data on anatomical pulse waves propagating along the body lumen and output the data to a velocity measurement system, wherein the anatomical pulse wave data comprises image data of an inner wall of the body lumen; and the velocity measurement system is communicatively coupled with the data collection device and configured to control the data collection device, wherein the velocity measurement system is configured to calculate the velocity of the anatomical pulse waves propagating along the body lumen based on the collected anatomical pulse wave data, wherein the anatomical pulse wave data is collected at a first location upon the occurrence of a first trigger point and at a second location upon the occurrence of a second trigger point, wherein the second location is a known distance from the first location, wherein the velocity of the anatomical pulse waves are calculated based, at least in part, on the difference in time durations between the occurrence of the first trigger point and the collection of anatomical pulse wave data at the first location and the occurrence of the second trigger point and the collection of anatomical pulse wave data at the second location, and wherein the anatomical pulse wave data collected at the first location and the second location are collected from different anatomical pulse waves. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification