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Intravascular blood flow measurement using differential pressure principle and an expanding flow sensor

A blood flow measurement, pressure sensor technology, applied in the direction of sensors, diagnostic recording/measurement, catheters, etc.

Pending Publication Date: 2019-11-29
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is an object of the present invention to provide a simpler and therefore more cost-effective alternative to existing intravascular blood flow measurement devices for determining the blood flow velocity inside a blood vessel

Method used

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  • Intravascular blood flow measurement using differential pressure principle and an expanding flow sensor
  • Intravascular blood flow measurement using differential pressure principle and an expanding flow sensor
  • Intravascular blood flow measurement using differential pressure principle and an expanding flow sensor

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Embodiment Construction

[0090] Figure 1A An embodiment of a blood flow measurement system 100 for measuring a blood flow inside a blood vessel 101 of a living body using an intravascular blood flow measurement device 102 is shown. Figure 1B Shown is a cross-sectional view of an intravascular blood flow measurement device 102 placed inside a blood vessel 101 , having a cross-sectional area value given by A .

[0091] The cross-sectional area value A of the blood vessel 101 is in Figure 1B is explicitly indicated by the underlined letter A, and in Figure 1A , indirectly indicated by the double arrow marked A indicating the diameter of the blood vessel.

[0092] The intravascular blood flow measuring device 102 comprises a body 103 adapted for being placed inside a blood vessel 101 of an organism and extending along a longitudinal direction L which is substantially equal if the measuring device is well aligned in the blood vessel. coincides with the main direction of blood flow.

[0093] The prese...

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PUM

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Abstract

A blood flow measurement system for measuring a blood flow quantity such as flow velocity or flow volume inside a blood vessel includes an intravascular blood flow measurement device with a body thatcomprises an expandable body section. A control unit sequentially provides a size control signal indicative of a respective one of the at least two predetermined expandable sizes to be assumed by theexpandable body section. A pressure sensor unit measures respective sequences of blood pressure signals over a measuring time span defined with respect to a heart cycle period. A flow determination unit uses the values of cross sectional area of the expandable body section, the associated pressure signals and a known value of a density of blood, to calculate a value of a blood flow quantity insidethe blood vessel based on Bernoulli's law.

Description

technical field [0001] The present invention relates to an intravascular blood flow measurement device, a blood flow measurement system, a method for controlling the operation of an intravascular blood flow measurement device, a method for determining blood flow inside a blood vessel of an organism, and a computer program. Background technique [0002] Vascular inflow measurement has important clinical applications in cardiology and medical examination of peripheral arteries. Measuring coronary flow reserve (CFR) is a well-recognized method of determining whether a narrowing in a coronary artery is restricting blood flow. CFR involves measuring blood flow in narrowed arteries at rest and during periods of congestion. Flow measurement is considered particularly suitable for characterizing stenosis. However, measuring flow is challenging compared to measuring pressure. For example, Doppler ultrasound measurements require precise and time-consuming placement of sensor wires ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00A61B5/0215A61B5/027A61M25/00
CPCA61B5/6853A61B5/0215A61B5/027A61M2025/0002A61B5/02035A61B5/02158A61B5/0285
Inventor M·米勒C·P·亨德里克斯
Owner KONINKLJIJKE PHILIPS NV