KR20190051327A - Blood pressure measurement system - Google Patents

Abstract

The present invention relates to a blood pressure measurement system for measuring and displaying the maximum blood pressure and the minimum blood pressure. More particularly, the present invention relates to the blood pressure measurement system comprising: a measurement unit (100) for measuring the blood pressure for n times per second; an analysis unit (300) for analyzing and calculating the maximum blood pressure value and the minimum blood pressure value using data of the blood pressure measured for n times per second; and a display unit (400) for displaying the calculated maximum blood pressure value and minimum blood pressure value, respectively.

Description

[0001] BLOOD PRESSURE MEASUREMENT SYSTEM [0002]

The present invention relates to a blood pressure measurement system, and more particularly, to a blood pressure measurement system for measuring and displaying a systolic blood pressure and a diastolic blood pressure.

Fractional flow reserve (FFR) is used as a lesion-specific functional index that accurately predicts the degree of stenosis of the coronary artery. As shown in FIG. 1, the FFR measures the lowest mean blood pressure (Pd) at the lesion site after adenosine injection in the coronary artery and the mean aorta blood pressure (Pa) through the induction catheter at this time, (Pd / Pa).

The point at which the FFR measurement value is 0.75 is known as the hypothermic threshold for myocardial infarction. FFR = 1 is a normal vessel, and medication is recommended rather than intervention if 0.75-0.8. If the FFR value is less than 0.75, coronary artery intervention should be performed.

The myocardial perfusion reserve is measured using a coronary artery blood pressure measurement system. The coronary artery blood pressure measurement system is largely composed of three main components (sensor, guide wire, display HW / SW).

As shown in FIG. 2, the optical blood pressure sensor of the sensor uses a Fabry-Perot interferometer principle and is composed of a diaphragm head and optical fiber fabricated on the basis of MEMS technology. The diaphragm head has a parallel reflection surface, and the distance of the parallel reflection surface is changed according to the external pressure, so that the wavelength modulation characteristic and the light sensitivity change of the optical signal can be measured.

The guide wire is used to measure the blood flow reserve of the myocardial fraction. An optical sensor is built in to measure the blood pressure of the blood flow accurately and inserted into the coronary artery to measure the blood pressure. The guide wire is composed of a stainless steel body and a coil tip.

The display hardware displays the measured optical sensor index, and the software has the same configuration as the interface shown on the display.

Korean Patent Laid-Open No. 10-2007-0111333 (published on November 21, 2007) (hereinafter referred to as "prior art") discloses an apparatus and a method for measuring blood pressure. However, the prior art does not disclose a technique of measuring the blood pressure changing in real time at the time of blood pressure measurement and indicating the blood pressure by FFR, and the contents thereof are needed.

[Prior Art Literature]

[Patent Literature]

Korean Patent Laid-Open No. 10-2007-0111333 (published on November 21, 2007)

An object of the present invention is to provide a blood pressure measurement system for calculating and displaying a maximum blood pressure value and a minimum blood pressure value in data obtained by measuring blood pressure.

The present invention relates to a blood pressure measuring system, comprising: a measuring unit (100) for measuring blood pressure n times per second; An analysis unit 300 for analyzing and calculating a maximum blood pressure value and a minimum blood pressure value using n blood pressure data per second; And a display unit 400 for displaying the calculated maximum blood pressure value and minimum blood pressure value, respectively.

If the difference between the maximum blood pressure value and the minimum blood pressure value is equal to or greater than a preset value, the analyzer 300 may calculate the maximum blood pressure value or the minimum blood pressure value in the blood pressure data, or may calculate the maximum blood pressure value and the minimum blood pressure value And when the difference is smaller than the predetermined value, the previously calculated maximum blood pressure value or minimum blood pressure value is maintained.

If the difference between the maximum blood pressure value and the minimum blood pressure value is equal to or greater than a predetermined value and the maximum blood pressure value or minimum blood pressure value is the first or nth measured blood pressure data, The maximum blood pressure value or the minimum blood pressure value is maintained.

If the difference between the maximum blood pressure value and the minimum blood pressure value is equal to or greater than a predetermined value and the maximum blood pressure value or the minimum blood pressure value is not the first or nth measured blood pressure data, The minimum blood pressure value and the minimum blood pressure value among the blood pressure data measured from the first to the n-th blood pressure data.

As described above, according to the embodiment of the present invention, it is possible to calculate and display the FFR according to the change of the blood pressure simultaneously with the blood pressure measurement.

1 is a view showing insertion of a fiber optic blood pressure sensor for measuring a pressure in a blood vessel
2 is a photograph of a conventional optical fiber blood pressure sensor
3 is a block diagram of a blood pressure measurement system according to a preferred embodiment of the present invention
FIG. 4 is a graph showing a blood pressure measurement using a blood pressure measurement system according to a preferred embodiment of the present invention
5 is a flowchart showing a blood pressure measurement algorithm used in a blood pressure measurement system according to a preferred embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, a blood pressure measurement system according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In the following description of the present invention, reference will be made to the accompanying drawings.

Referring to FIG. 3, the present invention relates to a blood pressure measurement system, comprising: a measurement unit 100 for measuring n blood pressure values per second; and a maximum blood pressure value And an analysis unit 300 for analyzing and calculating a minimum blood pressure value and a display unit 400 for displaying the calculated maximum blood pressure value and minimum blood pressure value, respectively.

The logic for calculating the maximum blood pressure value and the minimum blood pressure value will be described in detail with reference to FIGS. 4 and 5. FIG.

First, the blood pressure is measured by the measuring unit 100. More specifically, the measuring unit 100 may be formed of a wire coupled with an optical sensor. The measurement unit 100 is inserted into a blood vessel to be measured, and the pressure of the blood vessel is measured by the optical sensor using a wavelength modulation specification, a light sensitivity change, or the like of the optical signal.

The measurement unit 100 measures the blood pressure n times per second. That is, the measurement unit 100 measures the blood pressure n times per second, converts the measured data into an electrical signal, and outputs the electrical signal as an analog signal. In addition, it is preferable that the n blood pressure data per one second includes at least one beating cycle in which the heart runs once.

The measured blood pressure data is output as an analog signal and converted into a digital signal by the signal processing unit 200. The converted digital signal represents a blood pressure value, and n data per second is transmitted from the signal processing unit 200 to the analyzing unit 300 through serial communication. Also, the signal processing unit 200 may transmit the converted digital signal data to a storage unit (not shown) and store the converted digital signal data. The blood pressure measurement data converted into the digital signal by the signal processing unit 200 is shown in FIG.

The analysis unit 300 acquires n blood pressure data per second transmitted from the signal processing unit 200 through serial communication and calculates a maximum blood pressure value and a minimum blood pressure value among the n blood pressure data obtained per second The blood pressure value is analyzed and calculated.

In more detail, the analyzer 300 calculates a maximum blood pressure value and a minimum blood pressure value among data obtained by measuring n blood pressure values per second. At this time, it is preferable that at least one pulse period in which the heart runs once is included in the data of n blood pressure measurements per second.

For example, when the blood pressure data measured n times per second in FIG. 4 is from a1 to n, a value of a2 which is the maximum blood pressure value and a value of a3 which is the minimum blood pressure value are calculated.

If the difference between the calculated maximum blood pressure value a2 and the minimum blood pressure value a3 is equal to or greater than a preset value, the analyzer 300 determines the maximum blood pressure value or the minimum blood pressure value in the blood pressure data measured in the heartbeat period The blood pressure value is calculated.

The analyzer 300 maintains the previously calculated maximum blood pressure value or minimum blood pressure value when the difference between the calculated maximum blood pressure value a2 and the minimum blood pressure value a3 is less than a predetermined value. The reason is that when the difference between the calculated maximum blood pressure value and the minimum blood pressure value is smaller than a preset value, it is judged as noise and analysis is not performed.

For example, the difference between the maximum blood pressure value and the minimum blood pressure value can be set to 3 mmHg. At this time, if the difference between the maximum blood pressure value a2 and the minimum blood pressure value a3 calculated from the a1-th to the n-th blood pressure data is greater than or equal to 3 mmhg, the analyzer 300 calculates the blood pressure And operates the logic to calculate the maximum blood pressure value and the minimum blood pressure value in the data.

In addition, when the difference between the maximum blood pressure value and the minimum blood pressure value is not more than 3 mmHg, the previously calculated maximum blood pressure value or minimum blood pressure value is maintained.

If the difference between the maximum blood pressure value and the minimum blood pressure value is 3 mmHg or more and the maximum blood pressure value or the minimum blood pressure value is the first or nth measured blood pressure data, The blood pressure value or the minimum blood pressure value is maintained.

If the maximum blood pressure value or the minimum blood pressure value is not the first or nth measured blood pressure data, the analyzer 300 determines the maximum blood pressure value and the minimum blood pressure value Lt; / RTI >

That is, the analyzer 300 determines whether the maximum blood pressure value or the minimum blood pressure value among the blood pressure data measured from the first to n-th blood pressure data corresponds to the first or n-th measured blood pressure data.

More specifically, if the blood pressure data measured in FIG. 4 is a5 to a7, the maximum blood pressure value is a5 and the minimum blood pressure value is a6. At this time, since the maximum blood pressure value is the first measured blood pressure value in the period a5 to a7, the previously calculated maximum blood pressure value a4 is maintained and displayed.

If the measured blood pressure data is a1 to n, the maximum blood pressure value is a2 and the minimum blood pressure value is a3. At this time, since the maximum blood pressure value and the minimum blood pressure value are not a1 or nth blood pressure values, a2, which is the maximum blood pressure value within the nth measured blood pressure value range in a1, and a3 which is the minimum blood pressure value are calculated and displayed.

The present invention is a result of research carried out by the Ministry of Commerce, Industry and Energy, the Korea Industrial Technology Development Agency, the cooperation promotion promotion business, and the optoelectronics convergence business.

[Reference Numerals]

100:

200: Signal processor

300: Analysis section

400:

Claims (4)

A measurement unit 100 for measuring the blood pressure n times per second;
An analysis unit 300 for analyzing and calculating a maximum blood pressure value and a minimum blood pressure value using n blood pressure data per second; And
A display unit 400 for displaying the calculated maximum blood pressure value and minimum blood pressure value, respectively;
And a blood pressure measuring device for measuring blood pressure.
The method according to claim 1,
The analyzing unit 300
Calculating a maximum blood pressure value or minimum blood pressure value from the blood pressure data when the difference between the maximum blood pressure value and the minimum blood pressure value is equal to or greater than a predetermined value,
And maintains the previously calculated maximum blood pressure value or minimum blood pressure value when the difference between the maximum blood pressure value and the minimum blood pressure value is less than a preset value.
3. The method of claim 2,
The analyzing unit 300
Wherein the difference between the maximum blood pressure value and the minimum blood pressure value is equal to or greater than a predetermined value,
And maintains the previously calculated maximum blood pressure value or minimum blood pressure value when the maximum blood pressure value or the minimum blood pressure value is the first or nth measured blood pressure data.
3. The method of claim 2,
The analyzing unit 300
Wherein the difference between the maximum blood pressure value and the minimum blood pressure value is equal to or greater than a predetermined value,
And calculates a maximum blood pressure value and a minimum blood pressure value of the blood pressure data measured from the first to n-th blood pressure data when the maximum blood pressure value or the minimum blood pressure value is not the first or nth measured blood pressure data, Measuring system.

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