KR20080096962A - Blood pressure measuring apparatus and method thereof - Google Patents

Abstract

A blood pressure measuring apparatus and a measuring method using the same reduce movement limit of a subject by reducing the volume of a cuff compressing the blood pressure measurement part of the subject. A cuff(110) changeably pressurizes the body part of the subject without the increment of volume. A driving part(120) changes compression of the cuff and provides the changed result, and outputs a load size value. A sensor unit is arranged adjacently to the cuff and senses the blood flow or the pulse of the subject body part. A matching unit provides a pressure value applied to the body part of the subject according to the load size value which the driving part provides based on the relationship information between the load size which the driving part provides and the standard pressure which is actually measured at a tonometer for the subject. A controller controls the driving part based on the information of the sensor unit and determines the blood pressure measurement time. The controller provides the blood pressure measured by obtaining the pressure value corresponding to the driving load measured in the measurement time through the matching unit.

Description

Blood pressure measuring apparatus and blood pressure measuring method using same {Blood pressure measuring apparatus and method

1 is a view showing a conventional mercury sphygmomanometer.

2 is a pulse sound and pulse vibration change of blood flow with time used in the blood pressure measurement method

Graph showing the.

Figure 3 is an exemplary view showing a wearing state of the blood pressure measuring device.

Figure 4 is a block diagram showing the configuration and operation of the blood pressure measuring device.

5 is a configuration diagram showing another configuration of the blood pressure measuring device.

Figure 6 is a block diagram showing the configuration of the blood pressure measuring device.

Figure 7 is a block diagram showing in detail the driving form of the blood pressure measuring device.

8 is a measurement graph for explaining a method of matching the driving load and the pressure value of the blood pressure measuring device.

9 is a flow chart showing a blood pressure measurement process of the blood pressure measuring device.

<Explanation of symbols for the main parts of the drawings>

510: driving unit 520: pressing unit

530: matching unit 540: control unit

550: sensor unit 610: control unit

620: driver and sensing unit 630: gear unit

640: driving means 650: encoder

The present invention relates to an apparatus and a method for measuring blood pressure by using a cuff to press the blood pressure measurement site of the subject.

The pressure on the walls of blood vessels is called blood pressure, and the heart repeats its contraction and expansion about 60 times per minute. When the heart contracts and pushes blood, the pressure on the blood vessels is called 'constrictive blood pressure' and because it is the highest, it is called 'high blood pressure'. In addition, the pressure that is maintained in the blood vessels when the blood is received as the heart is expanded 'relaxed blood pressure' is called the 'lowest blood pressure' because of the lowest. Normal blood pressure of normal people is 120mmHg systolic blood pressure, the relaxation blood pressure is 80mmHg.

At least one in four Korean adults is hypertension, and since the age of 40, the rate has increased rapidly. The problem is that hypertension can be a cause of other life-threatening complications such as eye disease, kidney disease, arterial disease, brain disease, and heart disease if left unchecked for a long time without proper management of hypertension. . Therefore, continuous measurement and management of blood pressure should be performed in patients with the above complications.

Conventionally, in order to measure blood pressure, the pressure of the blood pressure measurement part of the subject is pressed to reduce the degree of pressure, and then gradually decrease the pressure and detect the beating sound or pulse generated when the flow of blood flow resumes. Measured. Mercury tonometer and electronic tonometer as a means for measuring the blood pressure by detecting the pulse or pulse vibration.

1 is a view showing a conventional mercury sphygmomanometer 10. Referring to FIG. 1, the mercury sphygmomanometer measures the air-injection cuff 12 that compresses the blood pressure measurement site of the subject by wrapping the upper cuff 12 of the subject and injecting air into the cuff 12 using a pump 13. Compress the site to block the flow of blood. Thereafter, the pressure of the cuff is gradually leaked to reduce the pressure, and at this time, a stethoscope is detected using a stethoscope to determine whether the blood flow flows. When the blocked blood flow begins to resume slowly, a beep is detected at the subject's measurement site. The beating sound is detected using a stethoscope. The time when the beating sound is detected is the time when the contraction blood pressure is measured and the measured value can be confirmed through the mercury tube (11). In addition, the blood vessels are completely open and the flow of blood flows smoothly, and a time point at which the beating sound is not detected. This time point is when the relaxation blood pressure is measured and the measured value is confirmed through the mercury tube 11. As described above, the mercury sphygmomanometer measures blood pressure using a pulse sound. Such a method is referred to as a Korotkoff method.

Figure 2 shows the pulse sound and pulse vibration change of blood flow with time used in the blood pressure measurement method. Referring to FIG. 2, the detection of the pulse sound by the Korotkoff method shown at the top may be performed by using a stethoscope in a mercury sphygmomanometer as mentioned in FIG. 1, or using a sound pressure sensor or a Doppler effect in an electronic sphygmomanometer. It is possible to detect via an ultrasonic sensor. The Korotkoff method detects the measurement time of contraction and relaxation blood pressure by detecting the pulse sound, and measures the blood pressure at the time point and outputs the result.

The pulse vibration change shown at the bottom uses an oscillometric method. The oscillometric method is a method of measuring blood pressure by detecting the vibration of the pulse while sequentially depressurizing and blocking blood flow by pressurizing the cuff as much as possible. After the flow of blood is blocked, the pressure starts to depress sequentially, and the pulse begins to vibrate rapidly. The time point is the time point measured by contraction blood pressure. In addition, if sequential decompression continues after the above point, a time point in which the vibration of the vein decreases rapidly appears. An electronic sphygmomanometer that can use the oscillometric method detects vibration of the pulse using a bellows sensor.

Blood pressure varies depending on the physical characteristics of the subject. Therefore, patients with complications in the body need to periodically measure blood pressure. The mercury blood pressure monitor and the electronic blood pressure monitor provide inconvenience to the patients due to the following problems.

First, the mercury sphygmomanometer and the electronic sphygmomanometer use a cuff that requires air injection, and the cuff has a large volume, which causes a user to wear it in real time.

In addition, the mercury sphygmomanometer using the pneumatic cuff to the patient to be frequently measured blood pressure is excessive to carry the subject in real time due to excessive volume and weight, the patient has a hassle to detach the sphygmomanometer every time.

Although there is a pneumatic electronic sphygmomanometer with the same precision as described above, when applied to a case where the patient needs to carry out blood pressure periodically while carrying it, the patient's behavior is heavy and bulky due to the use of an electric pump and a pneumatic cuff. There is a problem of this inconvenience.

In addition, there are non-pressure electronic sphygmomanometers that measure blood pressure based on various parameters of the pulse of the wrist or the fingertips. Difficult to apply to patients.

Accordingly, an object of the present invention is to provide a blood pressure measuring device for easily measuring blood pressure by providing a simple cuff that does not interfere with the behavior of the subject who needs to measure blood pressure periodically.

In addition, an object of the present invention is to minimize the blood pressure measurement error by analyzing the blood pressure pattern of the subject in consideration of the relative time point of blood pressure measurement for each subject and to measure close to the blood pressure measurement time of the subject.

In order to achieve the above object, the present invention provides a cuff for pressing the body part of the subject variably without increasing the volume; A driving unit for varying the degree of compression of the cuff and outputting a load size value thereof; A sensor unit disposed adjacent to the cuff to sense blood flow or pulse of the body part of the subject; A matching unit having information corresponding to a load size value provided by the driving unit corresponding to the pressure value applied to the body part of the subject; And a controller for controlling the driving unit based on the information of the sensor unit to determine a blood pressure measurement time point, and outputting the pressure value by matching the driving load measured at the measurement time point to the matching unit. .

In addition, the present invention and the cuff for pressing the body part of the subject by the change in length to achieve the above object; A driving unit for varying the degree of compression of the cuff and outputting a load size value thereof; A sensor unit disposed adjacent to the cuff to sense blood flow or pulse of the body part of the subject; A matching unit having standard pressure provided by a pneumatic sphygmomanometer and information on a load size provided by the driving unit, and measured time points of contraction blood pressure and relaxation blood pressure measured in each case; Corresponding relationship between the standard pressure and the actual load information of the subject provided in the matching unit based on the time of occurrence of systolic blood pressure and the time of relaxation blood pressure to obtain a mutual correspondence relationship, and then based on the information of the sensor unit And a control unit for determining blood pressure measurement time points by controlling the driving unit, and obtaining standard pressures from the matching unit through the obtained corresponding relationship with the driving loads measured at the measurement time points and providing them as blood pressure information. It is done.

In addition, the present invention in order to achieve the above object is a blood pressure measurement method using a blood pressure measuring device for measuring the blood pressure of the user using a cuff to apply pressure on the body, the result obtained by measuring the same body part of the subject A matching step of matching and storing driving load change information of the blood pressure measuring device and pressure change information measured under the same conditions by a standard blood pressure monitor using a pneumatic cuff; Adjusting the length of the cuff to adjust the degree of compression of the cuff; Determining the blood pressure or pulse through a sensor to determine the time of measuring the blood pressure; And a conversion step of detecting a load required to provide pressure of the cuff in the determining step and outputting a pressure value corresponding to the load as blood pressure based on the information stored through the matching step.

The control unit may include a timer unit that checks time in order to transmit a signal at regular intervals or check an operation state. Therefore, the controller may measure the blood pressure by supplying power to the units at regular intervals based on the signal provided by the timer unit.

The sensor unit may include a sound pressure sensor or an ultrasonic sensor for detecting a pulse sound, and the control unit may determine a blood pressure measurement time by a Korotkoff method through the information of the sound pressure sensor or the ultrasonic sensor.

The sensor unit includes a bellows sensor that detects a frequency according to the pulse vibration, and the controller is configured to determine the blood pressure measurement time point by an oscillometric method through the pulse vibration detection of the bellows sensor.

Since the Korotkoff method and the oscillometric method for measuring blood pressure are well known in the art, a detailed description thereof will be omitted.

The blood pressure measuring device may be connected to an internal / external module capable of short-range communication. Accordingly, the blood pressure measuring device periodically communicates the blood pressure information of the subject with an external storage medium to transmit the blood pressure information, or communicates with the means for notifying the blood pressure abnormality information of the subject to output blood pressure information or abnormality of the subject. It can be done. The control unit may receive information on the load size provided by the driving unit and the pressure value of the standard pressure gauge applied to the body part of the subject through the internal / external modules, or store the matching information. .

3 is a view showing a wearing state of the blood pressure measuring device. The blood pressure measuring device includes a cuff 110 mounted on the upper arm 200 of the test subject and pressurizes the measuring part of the test subject without increasing the volume, and transmits power to drive the cuff 110. 120 and a sensor 130 for detecting a blood flow state of the subject.

4 is a view showing the configuration and operation of the blood pressure measuring device. Referring to FIG. 4, the blood pressure measuring device presses and depressurizes a blood pressure measuring part of a subject, and a band-shaped cuff 110 having a concave-convex tooth on the back side of one side, and a dental cuff of the cuff 110. A gear unit 310 which is connected to a worm gear 340 for forwarding or reversing the cuff 110 by forward and reverse rotation in contact with each other to provide a high driving torque, and a motor which transmits power to the gear unit 310. It may be configured as a motor unit 320 and an encoder unit 330 for detecting the operation of the motor unit 320. The driving unit 120 including the motor unit 320 fixes the lower side of the band-shaped cuff 110 and the motor unit 320, and serves as a guide by itself. The upper side (part of which teeth are formed) is allowed to operate left and right according to the movement of the worm gear 340.

The cuff 110 may pressurize or depress the blood pressure measuring part of the subject by reducing the circumference of the cuff 110 by moving forward or backward according to the operation of the motor unit 320. In addition, the encoder unit 330 detects the rotational operation of the motor unit 320, and transmits a signal according to the control unit for controlling the speed of the motor unit 320 at a constant speed to the cuff based on the signal The pressure and pressure reduction of the 110 is adjusted.

5 is a view showing another configuration of the blood pressure measuring device. Referring to FIG. 5, the cuff 110 which depressurizes the blood pressure measuring portion of the subject is configured in a band shape, and is provided with an electromagnet 410 and a magnet 420 to press the blood pressure measuring portion of the subject. . In detail, the cuff 110 may have a band shape including a magnet 420 and an electromagnet 410, and both ends of the electromagnet 410 and the magnet 420 may be in a bent form.

In addition, the driving unit 120 for applying magnetic current to the electromagnet 410 to be magnetic may be disposed adjacent to the electromagnet 410.

Looking at the driving sequence, the driving unit adjusts the amount of current by adjusting the driving load to adjust the magnetic force of the electromagnet 410, when the current is applied, the electromagnet 410 has a magnetic consisting of N and S poles The magnetic force is formed with respect to the magnet 420 formed of the N pole and the S pole. At this time, as the driving load of the driving unit 120 increases, the amount of current increases, thereby increasing the magnetic force of the electromagnet 410.

At this time, the sock end of the electromagnet 410 and the sock end of the magnet 420 is composed of the same pole, so that the repulsive force acts between the same pole, the magnet 420 from the sock end of the electromagnet 410 As the end of the socks are gradually spaced apart, as a result, the circumference of the magnet 420 is reduced to press the blood pressure measurement part of the subject.

In addition, as the magnet 420 is gradually spaced apart from the electromagnet 410 as well as the repulsive force, the ends of the magnet 420 are gradually adjacent to each other, so that an attraction force is formed between the ends, and the attraction force is applied to the repulsive force. This can increase the degree of pressurization.

Figure 6 is a block diagram showing the configuration of the blood pressure measuring device. Referring to FIG. 6, the blood pressure measuring device provides a compression part 520 for applying pressure to a measurement part of the subject without increasing the volume, and provides varying degrees of compression of the compression part 520 and provides the load size value. A driving unit 510 for outputting, a sensor unit 550 for detecting blood flow or pulse of the body part of the subject, a load size value provided by the driving unit 510, and a pressure value applied to the body part of the subject accordingly The driving unit 510 is controlled based on the matching unit 530 having the corresponding information and the sensor unit 550 to determine the blood pressure measurement time, and the driving load measured at the measurement time is determined. The controller 540 may output a blood pressure based on the pressure value in contrast to the matching unit 530.

 The sensor unit 550 may include a sound pressure sensor or an ultrasonic sensor for detecting a pulse sound, and the control unit 540 is the blood pressure measurement point by the Korotkoff method through the pulse sound detection of the sound pressure sensor or the ultrasonic sensor. Can be determined. In addition, the sensor unit 550 may include a bellows sensor for detecting the vibration frequency of the pulse, the control unit 540 determines the time point for measuring the blood pressure by an oscillometric method through the pulse vibration detection of the bellows sensor. It may be.

Since the Korotkoff method and the oscillometric method are already well known in the art, a detailed description thereof will be omitted.

The driving unit 510 may include a motor for changing an electrical signal into physical motion, and a gear unit coupled to the motor to adjust pressure by increasing or decreasing the circumference of the cuff.

As shown in FIG. 4, the pressing part 520 may be configured as a band-shaped cuff. When the cuff is connected to the driving part 510 and the motor rotates in the forward direction, the circumference of the cuff is reduced. The measuring portion may be pressurized, and when rotated in the reverse direction, the circumference of the cuff may increase to reduce the measuring portion.

In addition, the cuff may be configured as an electron muscle having a variable length in accordance with the driving load in addition to the form shown in Figs. The electron muscle is reduced in pressure by increasing the driving load of the driving unit, and is reduced in pressure when the driving load is reduced is pressed.

The matching unit 530 measures a change in the pressure value of the examinee and stores information corresponding to the change in the pressure value of the driving load of the driving unit 510, and the control unit 540 controls the driving unit based on the information. The driving load of 510 may be controlled to pressurize or depress the measurement part of the subject using the cuff.

Since the change in the pressure value is different for each subject, it is necessary to obtain the relationship information on the actual pressure value corresponding to the measured driving load by specifying the change in the driving load of the driving unit 510 to a specific subject. This will be described in detail below.

The controller 540 may store the blood pressure information of the subject periodically measured in a database unit provided separately, and compare the output blood pressure information with a limit blood pressure range of the subject to exceed the corresponding range. You can record in the Department.

In addition, the controller 540 may be connected to a notification unit that outputs the abnormality as a sound or a display to the outside.

7 is a view showing in detail the driving form of the blood pressure measuring device. Referring to FIG. 7, a gear unit 630 for transmitting a force to the pressing unit 520, a driving unit 640 for transmitting power to the gear unit 630, and the driving unit 640. The driver and the sensing unit 620 to provide power and detect the driving load according to the power, the encoder unit 650 for detecting the operation of the driving means 640, the encoder unit 650 and the driver and sensing unit The controller 610 may control the operation of the driving means 640 based on the information of 620.

The control unit 610 sequentially increases or decreases the driving load through the driver and the sensing unit 620, and the encoder unit 650 detects the operation information of the driving means 640 according to the control unit 610. ), Uniform pressure and pressure reduction are possible.

8 is an exemplary measurement graph for explaining a method of matching the driving load and the pressure value of the blood pressure measuring device. FIG. 8 (a) is a graph showing pressure values for cuffs obtained when blood pressure measurement of the subject is performed using a standard blood pressure monitor (a type capable of outputting the measured pressure electronically) using a conventional air pressurized cuff. Referring to FIG. 8 (a), the vertical axis represents the magnitude of blood pressure, and the horizontal axis represents the time axis as the number of times the pressure of the cuff is measured while the pressure is reduced. That is, the order of sampling units is shown. Here, the graph starts from the maximum pressing time α of the cuff. From the time point α, the pressure is reduced at constant velocity. Accordingly, the flow of blood flow begins to be resumed at the time point A of sampling and pulse sound or pulse vibration is detected, which is the point of contraction blood pressure. In addition, if the pressure is continuously reduced after the A sampling point, the flow of blood flow returns to the normal state at the B sampling point, and thus, the pulse sound or the pulsation is not detected. This is the point of measurement of the relaxation blood pressure. In addition, the β-th sampling time point represents the number of times when the pressure measurement is completed.

Figure 8 (b) is a graph showing the information measured the driving load after applying the blood pressure measuring device to the same body part of the same subject. Referring to FIG. 8 (b), the vertical axis indicates the magnitude of the driving load of the blood pressure measuring device, and the horizontal axis indicates the number of sampling times of the driving load while reducing the pressure. The driving load graph is obtained while reducing the driving load at a constant speed while the driving load of the blood pressure measuring device is maximally applied. It starts from the time when the blood pressure measurement part of the subject is pressed as much as possible (α '), and β', which is the end point of blood pressure measurement, is passed through the systolic blood pressure measurement sampling point A 'and the relaxation blood pressure measurement sampling point B' while reducing the pressure at a constant velocity. Leads to

In order to use the blood pressure measuring device, it is necessary to perform a calibration operation that corresponds the driving load graph of the blood pressure measuring device to the pressure graph of the standard blood pressure monitor. Thus, even by measuring the driving load of the blood pressure measuring device, it is possible to obtain a substantial cuff pressure and provide it as a blood pressure value.

Hereinafter, an example of the calibration operation will be described in detail. It is assumed that the sampling unit of the standard blood pressure monitor is step_A, which is a unit for measuring pressure while exhausting air from the cuff of the standard blood pressure monitor and performing pressure reduction, and the sampling unit of the blood pressure measuring device is assumed to be step_V. The measuring device is a unit for measuring the driving load while reducing the circumference of the cuff to reduce the pressure.

It is assumed that α to β in FIG. 8 (a) are 1000 step_A, the time point at which the contraction blood pressure is detected is 180 step_A, and the time point B at which the relaxation blood pressure is detected is 800 step_A. In this case, α 'to β' of FIG. 8 (b) is 5000 step_V, A ', from which the systolic blood pressure is measured from the initial measurement, is 400 step_V, and B', from which the diastolic blood pressure is measured from the initial measurement. Assuming that up to 4300 step_V, the gap between A 'and B' is 3900 step_V, and since the gap between A and B is 650 step_A, a proportional relationship of 6 step_V = 1 step_A is established.

When the correlation between the two types of graphs is summarized and stored in the matching unit of the present embodiment, for example, when the time point corresponding to the measurement load at the time when contraction blood pressure is detected by the actual blood pressure measuring device is 460 step_V, the reference is The process proceeds by 60 step_V from 400 step_V. Accordingly, the progress of the corresponding standard blood pressure monitor is 10 step_A according to the correlation 6 step_V = 1step_A, and the cuff pressure value of the standard blood pressure monitor measured at 190 step_A of 180 step_A + 10 step_A can be obtained as a systolic blood pressure value.

The blood pressure value of the standard blood pressure monitor corresponding to the driving load of the blood pressure measuring device may be measured by matching the degree of change of the blood pressure measuring device with the standard blood pressure monitor.

If a new matching table is prepared by arranging the corresponding relations and stored in the matching unit, the cuff pressure of the standard pressure gauge corresponding to the driving load value obtained may be directly obtained.

As such, when the blood pressure measuring device detects the driving load value, the blood pressure measuring device outputs the blood pressure value based on the matching unit in which the pressure value of the corresponding cuff (when the pulse is detected) is stored. Meanwhile, since the actual measured values may vary according to the condition and environment of the examinee, a plurality of measured values may be measured and averaged.

In addition, the blood pressure measuring apparatus may further include a short range communication unit therein or be connected to a separate short range communication module, and the obtained matching information may be provided through the communication unit or the module and stored in the internal matching unit of the blood pressure measuring apparatus. have. Alternatively, both sides of information before matching may be stored.

9 is a flowchart illustrating a blood pressure measuring method of the blood pressure measuring apparatus. Referring to FIG. 9, the blood pressure measuring device matches the blood pressure measurement value of the standard blood pressure monitor with the driving load of the blood pressure measuring device through a calibration operation.

Thereafter, the blood pressure measuring device presses the blood pressure measuring part of the subject as the driving load is increased, and presses the blood pressure measuring part of the subject until a blockage of blood flow is detected through a sensor that detects pulse sound or pulse vibration. . After the blood flow is blocked, the pressure of the measurement site is released sequentially while detecting the pulse or pulse vibration by the sensor. Thereafter, the blood pressure measuring device measures the driving load at the number of times that the pulse sound or the pulse vibration is detected, and outputs a blood pressure value corresponding thereto, and displays this as systolic blood pressure.

After measuring the systolic blood pressure, the pressure is sequentially reduced further to measure the driving load at the number of times the pulse sound or pulse vibration is not detected, and outputs a corresponding blood pressure value, which is expressed as a relaxation blood pressure.

The present invention has the effect of reducing the constraint on the behavior of the subject by reducing the volume of the cuff for pressing the blood pressure measurement site of the subject.

In addition, the present invention by matching the unique blood pressure value according to the different physical characteristics for each subject to the driving load of the blood pressure measuring device in one-to-one, it is possible to reduce the error range compared to the standardized blood pressure measuring device to accurate blood pressure for a specific person There is an effect of detecting the measured value.

Claims (23)

A cuff that variably presses the body part of the subject without increasing the volume; A driving unit for varying the degree of compression of the cuff and outputting a load size value thereof; A sensor unit disposed adjacent to the cuff to sense blood flow or pulse of the body part of the subject; Matching unit for providing a pressure value applied to the body part of the subject according to the load size value provided by the driver based on the relationship information between the standard pressure actually measured by the pneumatic sphygmomanometer for the subject and the load size provided by the driver Wow; And a controller for controlling the driving unit based on the information of the sensor unit to determine a blood pressure measurement time point, and obtaining a pressure value corresponding to the driving load measured at the measurement time point through the matching unit. Blood pressure measuring device, characterized in that. The method of claim 1, wherein the sensor unit comprises a sound pressure sensor or an ultrasonic sensor for detecting the pulse sound, the control unit for determining the time point of blood pressure measurement by the Korotkoff method by detecting the sound of the sound pressure sensor or ultrasonic sensor. Blood pressure measuring device, characterized in that. The method of claim 1, wherein the sensor unit comprises a bellows sensor for sensing the frequency according to the pulse vibration, the control unit is characterized in that for determining the blood pressure measurement time point by the oscillometric method through the pulse vibration detection of the bellows sensor Blood pressure measuring device. The blood pressure measuring apparatus according to claim 1, wherein the driving unit comprises means for outputting a change in current magnitude according to the driving load as a change in voltage. The method of claim 1, wherein the driving unit A motor that converts the electrical signal into physical motion; And a gear unit coupled to the motor to adjust the pressure of the cuff. The blood pressure measuring apparatus according to claim 5, wherein the driving unit further comprises an encoder unit for detecting an operation, and the control unit controls the motor at a constant speed based on the output of the encoder unit. According to claim 5, wherein the cuff is formed in the form of a band having a tooth engaged with the gear portion, the circumference of the cuff is reduced when the motor rotates in the forward direction to press the measurement site and rotate in the reverse direction Blood pressure measuring device, characterized in that to increase the circumference of the cuff to depressurize the measurement site. The blood pressure measuring device according to claim 1, wherein the cuff has a band structure including an electronic muscle whose length varies according to a driving load. The cuff of claim 8, wherein the cuff is formed of a ring-shaped band portion including a magnet at a portion of the sock end and a band portion having an electromagnet formed in a portion of the ring-shaped band portion, and formed at both ends of the ring-shaped band. Blood pressure measurement device, characterized in that the magnet is spaced apart and engaged with the electromagnet ends. The blood pressure measuring apparatus of claim 1, wherein the controller comprises a timer unit that checks time in order to transmit a signal at regular intervals or check an operation state. The apparatus of claim 10, wherein the control unit operates for a predetermined period based on a signal provided by the timer unit, supplies power to each unit, measures blood pressure, and switches to a low power standby phase at another cycle. . The method of claim 1, further comprising: a database unit connected to the control unit to store cumulative blood pressure information of the test subject, wherein the control unit periodically or aperiodically provides blood pressure information of the test subject to the database unit. Blood pressure measuring device. The apparatus of claim 1, further comprising a notification unit connected to the control unit, wherein the control unit compares the blood pressure obtained through the information of the matching unit with a preset limit range, and determines whether the abnormality occurs. Blood pressure measuring device characterized in that the notification. The apparatus of claim 1, further comprising a short range communication unit connected to the control unit to transmit information, wherein the control unit provides measured blood pressure information through the short range communication unit, or the standard pressure measured by the test subject and the driving unit. Blood pressure measuring device, characterized in that for receiving the relationship information between the provided load size and storing in the matching unit. 15. The apparatus of claim 14, wherein the communication unit is in the form of a detachable external module. A cuff for pressing the body part of the subject by the change in length; A driving unit for varying the degree of compression of the cuff and outputting a load size value thereof; A sensor unit disposed adjacent to the cuff to sense blood flow or pulse of the body part of the subject; A matching unit having standard pressure provided by a pneumatic sphygmomanometer and information on a load size provided by the driving unit, and measured time points of contraction blood pressure and relaxation blood pressure measured in each case; Corresponding relationship between the standard pressure and the actual load information of the subject provided in the matching unit based on the time of occurrence of systolic blood pressure and the time of relaxation blood pressure to obtain a mutual correspondence relationship, and then based on the information of the sensor unit And a control unit for determining blood pressure measurement time points by controlling the driving unit, obtaining standard pressures from the matching unit through the corresponding relationship with the driving loads measured at the measurement time points, and providing them as blood pressure information. Blood pressure measuring device. In the blood pressure measuring method using a blood pressure measuring device for measuring the user's blood pressure using a cuff to apply pressure to the body, A matching step of matching and storing the drive load change information of the blood pressure measuring device obtained as a result of the measurement on the same body part of the subject and the pressure change information measured under the same conditions by a standard blood pressure monitor using a pneumatic cuff; Adjusting the length of the cuff to adjust the degree of compression of the cuff; Determining the blood pressure or pulse through a sensor to determine the time of measuring the blood pressure; And detecting a load necessary to provide pressure of the cuff in the determining step, and outputting a pressure value corresponding to the load into blood pressure based on the information stored through the matching step. . 18. The method of claim 17, wherein the driving load change information records the driving load periodically measured while depressurizing at a constant speed while the blood pressure measuring part of the subject is pressed as much as possible using the blood pressure measuring device. 18. The method of claim 17, wherein the pressure change information records pressure values periodically measured while depressurizing at a constant velocity while the blood pressure measurement part of the subject is pressed as much as possible using the standard blood pressure monitor. 18. The method of claim 17, wherein the matching step corresponds to correlating the driving load change information and the pressure change information on the basis of the time when the systolic blood pressure is measured and the time when the diastolic blood pressure is measured. The blood pressure measuring method according to claim 17, wherein the measuring step measures the time point at which the pulse sound or the pulse vibration is detected based on the information of the determining step by contraction blood pressure of the subject. 22. The method of claim 21, wherein the blood pressure measured at a time point at which no pulse or pulse vibration is detected after the blocking time is measured by the subject's relaxation blood pressure. 18. The method of claim 17, wherein the converting step further comprises the step of outputting the obtained blood pressure information through a near field communication method.

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