KR20200113912A - Blood pressure measurement apparatus - Google Patents

Abstract

According to an embodiment of the present invention, a blood pressure measurement apparatus comprises: a cuff enclosing a measurement portion of a subject, and expanding or contracting in accordance with the entry of air to press or release the measurement portion of the subject; a pump to supply air to the cuff; a control valve to discharge air supplied to the cuff, and control the flow of air discharged from the cuff; an air filter to guide the movement of air discharged from the cuff to control the pressure change of air; a pressure sensor to sense the pressure change of air passing through the air filter to be discharged; and a control unit to receive a sensed signal from the pressure sensor, and use the signal to estimate the blood pressure of the subject. According to an embodiment of the present invention, pump noise and air pressure noise can be removed from air flowing into the cuff and air discharged from the cuff through the air filter and a plurality of air tanks to minimize measurement errors to accurately measure the blood pressure of the subject and improve the reliability of the product.

Description

Blood pressure measurement apparatus

The present invention relates to a blood pressure measuring device, and more particularly, to a blood pressure measuring device having a noise removing means capable of controlling the change of sound transmitted through the air.

In general, blood pressure can be measured using an invasive method or a noninvasive method.

The invasive method is a method of measuring blood pressure by directly inserting a catheter into a blood vessel and connecting it to a manometer, and can continuously measure accurate blood pressure.

However, although blood pressure measurement by an invasive method is highly accurate, there is an inconvenience that a catheter must be inserted into a blood vessel. In addition, it is not appropriate when targeting non-severe patients because of the difficulty of the procedure and disadvantages such as pain, infection, and bleeding.

Accordingly, recently, a non-invasive method of measuring pressure when blood flow in the brachial artery or radial artery is stopped by winding a pressing member such as a cuff around a region to be measured blood pressure and putting air to compress it has been mainly used.

The non-invasive method may conveniently measure blood pressure without physical pain of the subject, and improve the accuracy of the measured blood pressure by using a variable characteristic ratio according to the shape of the waveform detected from the body of the subject measuring the blood pressure.

A typical non-invasive method is the auscultatory method, which measures blood pressure using a korotkoff sound.

The auscultation method is a method of measuring the Cortkov sound generated during the decompression process after sufficiently pressing the brachial artery to block blood flow to the artery.The measurement process is electronically processed through various sensors and configurations, and the screen or sound It is performed using a blood pressure measuring device that displays the measurement result through.

The conventional Cortkov type blood pressure measuring device is configured to detect the size of a fremitus generated in the cuff above the arterial blood vessel by a sensor when air pressure is applied to the cuff and then the air pressure is slowly removed.

According to this measurement method, the accuracy and reliability of the blood pressure measurement result is ensured by the cuff being in close contact with the body of the subject so that the sensor included in the cuff accurately detects the sound caused by the pulse.

However, not only the thickness and shape of body parts differ from person to person, but various variables exist in blood pressure measurement, such as an unintentional movement of the subject during measurement.

1 is a diagram schematically showing a conventional blood pressure measuring apparatus.

Referring to FIG. 1, a conventional blood pressure measuring apparatus includes a cuff 10 provided with a pressurizing table 11 for measuring pressurizing the upper arm of a subject, a compression belt 12 surrounding the pressurizing table 11 for measurement, and A pump 13 for winding up the belt 12 is provided.

However, such a conventional blood pressure measuring device measures the noise generated from the pump 13 when the pump 13 is operated and the noise of the air pressure generated through the valve when the air supplied to the cuff 10 is discharged. It is detected together with the signal, so there is a problem that it is impossible to accurately detect the signal.

In addition, due to the above problems, an error in the measurement result occurs, making it impossible to accurately measure blood pressure, as well as having to measure blood pressure multiple times or re-measure through a separate manual sphygmomanometer. there was.

Registered Patent Publication No. 10-0195805

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a blood pressure measuring device capable of accurately measuring a signal by removing pump noise and air pressure noise included in a measurement signal when measuring blood pressure. .

The subject of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A blood pressure measuring apparatus according to an embodiment of the present invention for solving the above problem includes: a cuff that surrounds a measurement area of a subject and expands or contracts according to the entry of air to pressurize or release the pressure of the measurement area of the subject; A pump supplying air to the cuff; A control valve for discharging the air supplied to the cuff and controlling a flow of air discharged from the cuff; A first air tank for introducing the air discharged from the cuff into the interior, buffering the pressure of the air introduced into the interior, and discharging it to the exterior; A sound sensor configured to detect the sound after moving the air discharged from the first air tank to a preset path and controlling a change in sound transmitted through the air; And a control unit capable of receiving a signal sensed from the sound detection unit and estimating a blood pressure of a subject by using the signal.

It may further include a second air tank for introducing the air discharged from the pump into the interior, buffering the pressure of the air introduced therein, and transferring the air to the cuff.

The first air tank and the second air tank may include a plurality of ports through which air can enter and exit; A main body communicating with the plurality of ports and forming a storage space capable of storing air therein; A buffer material buffering the pressure of the air introduced into the body and the air discharged from the body; And an on/off valve capable of selectively opening and closing the plurality of ports.

An air filter that guides the movement of the air discharged from the first air tank to control a change in pressure of the air; And a pressure sensor that senses a pressure change of air discharged through the air filter.

A first fluid flow line connecting the cuff, the pump, the control valve, the first air tank and the second air tank to each other to provide an air flow path; And a second fluid flow line connecting the first air tank and the air filter to each other to provide a flow path for air.

The sound detection unit may include a microphone module converting the sensed sound into an electrical signal and transmitting the converted sound to the control unit; And a fluid flow line for removing noise by connecting the first air tank and the microphone module to each other and providing a flow path of air to control changes in sound.

The length of the noise-removing fluid flow line is longer than that of the first fluid flow line and the second fluid flow line, and the noise-removing fluid flow line is formed of a plurality of straight sections and a plurality of curved sections. Can be.

The fluid flow line for removing noise may be bent and length adjusted in horizontal and vertical directions.

According to an embodiment of the present invention, it is possible to remove pump noise and air pressure noise from air flowing into the cuff and air discharged from the cuff through the air tank and the sound detection unit, thereby minimizing measurement errors to more accurately reduce the blood pressure of the subject. Can be measured, and the reliability of the product can be improved.

In addition, as the Cortkov method and the oscillometric method can be applied in parallel or selectively, the blood pressure of the subject can be measured in various ways according to the condition of the subject, thereby increasing the usability of the product, and through each method. Since the measured results can be compared, more accurate blood pressure measurement may be possible.

1 is a diagram schematically showing a conventional blood pressure measuring apparatus.
2 is a block diagram schematically showing a blood pressure measuring apparatus according to an embodiment of the present invention.
3 is a diagram schematically showing the internal structure of an air filter of a blood pressure measuring apparatus according to an embodiment of the present invention.
4 is a diagram schematically showing the internal structure of an air tank of a blood pressure measuring apparatus according to an embodiment of the present invention.
5 is a diagram schematically showing an arrangement structure of a fluid flow line inside a blood pressure measuring apparatus according to an embodiment of the present invention.
6 is a waveform diagram showing blood pressure measurement results before and after applying a sound detection unit to a blood pressure measuring apparatus according to an embodiment of the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described in this specification may be variously modified. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the accompanying drawings are only intended to facilitate understanding of various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and scope of the invention.

Terms including ordinal numbers such as first and second may be used to describe various elements, but these elements are not limited by the above-described terms. The above-described terms are used only for the purpose of distinguishing one component from other components.

In the present specification, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance. When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Meanwhile, a "module" or "unit" for a component used in the present specification performs at least one function or operation. And, the "module" or "unit" may perform a function or operation by hardware, software, or a combination of hardware and software. In addition, a plurality of "modules" or a plurality of "units" excluding "module" or "unit" to be performed in specific hardware or performed by at least one processor may be integrated into at least one module. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be abbreviated or omitted.

FIG. 2 is a block diagram schematically illustrating a blood pressure measuring apparatus according to an exemplary embodiment of the present invention, and FIG. 3 is a schematic diagram illustrating an internal structure of an air filter of a blood pressure measuring apparatus according to an exemplary embodiment of the present invention. In addition, Figure 4 is a view schematically showing the internal structure of the air tank of the blood pressure measuring device according to an embodiment of the present invention, Figure 5 is an arrangement structure of a fluid flow line inside the blood pressure measuring device according to an embodiment of the present invention FIG. 6 is a schematic diagram illustrating a blood pressure measurement result before and after applying a sound detection unit to a blood pressure measuring apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 2, a blood pressure measuring device 100 (hereinafter referred to as a'blood pressure measuring device 100') according to an embodiment of the present invention includes a cuff 110.

The cuff 110 surrounds the measurement area of the subject and expands or contracts according to the ingress of air to pressurize or release the pressure on the measurement area of the subject.

In more detail, the cuff 110 is connected to the pump 120 to be described later through a plurality of fluid flow lines 180, and may be formed as a band or strap-shaped airbag to wrap the measurement area of the subject. . Accordingly, when the pump 120 is driven, the cuff 110 expands by the air supplied from the pump 120 to transmit a predetermined pressure to the measurement part of the subject, and when the control valve 130 to be described later is driven. It can be contracted by exhaust to release the pressure applied to the measurement part of the subject.

For example, the cuff 110 is provided in a fixed state in a housing having a predetermined hardness formed in a tunnel structure, so that the arm of the test subject is only when the subject inserts the arm into the inside of the direct cuff 110. Can be wrapped. Here, the arm may include all parts of the body capable of measuring blood pressure, such as the forearm where the brachial artery is located, and the wrist where the radial artery is located.

In addition, although not shown in the drawings, the cuff 110 may be formed in a double pressing structure.

In more detail, the cuff 110 includes a measurement pressurizer that directly applies pressure to a measurement area of the subject, and is disposed around the measurement pressurization table and expands when the pump 120 is driven to press the measurement pressurization table. It may include a winding presser.

Accordingly, the cuff 110 can accurately press the measurement part of the subject to be measured, regardless of the sex or physical condition of the object to be measured, and maintains the degree of expansion of the pressurizer for winding according to the use environment. After that, it is possible to minimize the operation of the pump 120 by adjusting only the degree of expansion of the pressure plate for measurement.

For example, a fluid flow line 180 connected to the pump 120 is provided on the pressure plate for measurement and the pressure plate for winding, respectively, and the fluid flow line 180 connecting the pressure plate for measurement and the pump 120 includes a pump ( An air tank 170, which will be described later, may be disposed so that the pressure of the unstable air introduced from 120 is buffered and noise is removed. However, the present invention is not limited thereto, and a buffering means capable of buffering the pressure of air may be further provided in the fluid flow line 180 connecting the coiling pressurizing table and the pump 120 as needed.

In addition, the blood pressure measuring apparatus 100 includes a pump 120.

Referring to FIG. 2, the pump 120 is connected to the cuff 110 through the fluid flow line 180, and is electrically connected to the controller 160, so that the pump 120 is connected to the cuff 110 according to a control command from the controller 160. Supply air.

For example, the pump 120 may be formed as a cylinder-shaped actuator capable of compressing air through a pressure action and supplying the compressed air to the fluid flow line 180. In addition, the pump 120 may be configured to be manually operated. However, the pump 120 is not limited thereto, and may be changed and applied in various forms within a range capable of performing the same function.

In addition, a separate fluid storage tank (not shown) capable of supplying air or a fluid other than air to the pump 120 may be further provided at one side of the pump 120.

For example, the fluid storage tank may store pure fluid that does not contain foreign substances in the atmosphere. Through this, it is possible to prevent deterioration of the operating performance of the pump 120 due to the introduction of foreign substances into the pump 120, and the present blood pressure measuring apparatus 100 can be used even in an environment where air in the atmosphere cannot be used.

In addition, the blood pressure measuring apparatus 100 includes a control valve 130.

The control valve 130 is electrically connected to the control unit 160 and controls the opening and closing of the fluid flow line 180 according to the control command of the control unit 160 to discharge the air supplied to the cuff 110, through which the cuff Controls the flow of air discharged from (110).

That is, the control valve 130 discharges air rapidly, continuously, or in stages according to the control command of the controller 160, and the flow rate, pressure, speed, and flow rate of air moving in one direction through the fluid flow line 180 You can control hydraulic pressure, etc.

For example, a plurality of control valves 130 may be provided to perform different roles according to a control command from the controller 160, and may be applied as any one of a conventional solenoid valve, a proportional valve, a servo valve, and a check valve. In addition, flow control means such as an orifice or a regulator may be further applied to the control valve 130. However, the control valve 130 is not limited thereto, and may be changed and applied in various forms within a condition capable of performing the same function.

In addition, the blood pressure measuring apparatus 100 includes an air tank 170.

Referring to FIG. 2, the air tank 170 is disposed between the cuff 110 and the pump 120, and between the control valve 130 and the air filter 140, respectively, and unstable pressure change of air introduced into the interior. By damping the air pressure can be stabilized.

That is, as the air introduced into the cuff 110 and the air discharged from the cuff 110 pass through the air tank 170 and then pass through the air filter 140, pump noise and air pressure noise can be completely removed. have.

The air tank 170 introduces the air discharged from the cuff 110 into the interior to buffer the pressure of the air introduced into the interior, and then discharges the air to the outside and delivers the first air to the sound detection unit 190 to be described later. It includes a tank 171 and a second air tank 172 that introduces the air discharged from the pump 120 into the interior to buffer the pressure of the air introduced into the interior, and then transmits the air to the cuff 110.

Referring to FIG. 4, each air tank 170 is connected to a fluid flow line 180 to be described later and communicates with a plurality of ports 170a and a plurality of ports 170a through which air is allowed to enter, It may include a body 170b forming a storage space capable of storing. For example, the body 170b may be formed of an elastic material that buffers a pressure change of unstable air introduced into the interior by an elastic force. Here, the elastic body may be applied to at least one of a rubber material having elasticity, a synthetic resin material such as plastic, silicone, urethane, and latex. However, the main body 170b of the air tank 170 is not necessarily limited thereto, and may be applied with various materials within conditions capable of performing the same function.

In addition, each air tank 170 includes a buffer material 170c provided inside the main body 170b to buffer the pressure of air flowing into the main body 170b and the air discharged from the main body 170b, and a control unit 160 ) May include an on-off valve 170d that is electrically connected to and selectively opens and closes a plurality of ports 170a. For example, the buffer material 170c may be applied as a carbon filter or a mesh sponge.

Accordingly, the air introduced into each air tank 170 may be stabilized by the body 170b and the buffer material 170c buffering the pressure of the air.

In addition, the blood pressure measuring apparatus 100 includes a sound detection unit 190.

2 and 5, the sound detection unit 190 moves the air discharged from the first air tank 171 to a preset path and controls the change in sound (Kortkov sound) transmitted through the air. After that, it detects a change in the sound whose change is controlled, that is, a stabilized sound.

The sound detection unit 190 may include a microphone module 191 and a fluid flow line 192 for removing noise.

The microphone module 191 is electrically connected to the control unit 160 to be described later, and is connected to the first air tank 171 through a fluid flow line 192 for noise removal, which will be described later, in the first air tank 171. Sound in the air transmitted through the fluid flow line 192 for noise removal may be detected. In addition, the microphone module 191 may convert the sensed sound into an electrical signal and transmit it to the controller 160.

For example, the microphone module 191 is connected to a microphone body (not shown) for sensing sound and a microphone body inside and connected to a fluid flow line 192 for noise removal through the fluid flow line 192 for noise removal. It may include an amplifying tube (not shown) for amplifying the sound in the introduced air. Here, the microphone body may be configured of various methods capable of performing the same function as well as a known piezo or condenser method.

The noise-removing fluid flow line 192 connects the first air tank 171 and the microphone module 191 to each other to provide a flow path for air, and stabilizes the sound in the air during the movement of air to control changes in sound. can do.

That is, the sound discharged together with the air from the first air tank 171 moves along a preset path through the fluid flow line 192 for noise removal, and in this process, high frequency and low frequency are removed and stabilized. Can be.

Accordingly, the waveform of the blood pressure measured by the blood pressure measuring apparatus 100 to which the air tank 170 and the sound detection unit 190 are applied (FIG. 6(b)) is the air tank 170 and the sound detection unit 190 Compared to the waveform of the blood pressure measured in the state in which) is not applied (Fig. 6(a)), noise is significantly removed, and accordingly, the measurement error can be minimized to measure the blood pressure of the subject more accurately. In addition, since it is possible to accurately measure the blood pressure of the subject, the reliability of the product can be improved.

In addition, the fluid flow line 192 for noise removal may be formed to have a length in which sound in the air can be filtered for a longer time.

2 and 5, the length of the fluid flow line 192 for noise removal may be longer than the length of the first fluid flow line 181 and the second fluid flow line 182 to be described later. Here, the length of the first fluid flow line 181 and the second fluid flow line 182 means the length of the first fluid flow line 181 or the length of the second fluid flow line 182 or the first fluid It may be a length obtained by adding the length of the flow line 181 and the length of the second fluid flow line 182.

In addition, the fluid flow line 192 for noise removal may be formed of a plurality of straight sections and a plurality of curved sections so as to form a longer air flow path within a preset space.

In addition, the fluid flow line 192 for noise removal can be bent in a vertical direction as well as in a horizontal direction, so that it can be formed in a multi-layered shape such as a coil shape as needed, as well as a shape that can be adjusted in length. If necessary, the length is varied according to the internal structure of the blood pressure measuring device, thereby forming a longer air flow path in the blood pressure measuring device 100.

For example, the fluid flow line 192 for noise removal may be stretchable and may be formed in the form of a flexible elastic material or a corrugated pipe, and an assembly form capable of connecting a plurality of parts to each other by using a separate coupler (not shown). Can be formed as However, the fluid flow line 192 for noise removal is not necessarily limited thereto, and may be changed and applied to various shapes and materials within conditions capable of performing the same function.

In addition, the blood pressure measuring apparatus 100 includes a control unit 160.

Referring to FIG. 2, the control unit 160 receives a signal sensed from the sound detection unit 190 and estimates a blood pressure of a subject by using the signal.

In more detail, the control unit 160 receives the signal detected from the microphone module 191 of the sound detection unit 190, stores, calculates, and determines the signal through a preset algorithm to determine the highest/lowest blood pressure of the subject. , Derive information such as average blood pressure and pulse rate.

In addition, the control unit 160 is electrically connected to each component of the blood pressure measuring device 100, generates a control command according to a signal input from the outside, and transmits the generated control command to the corresponding component to each component. You can control the elements.

Specifically, the control unit 160 transmits a control command to the pump 120 to inflate the cuff 110, thereby controlling the pressure of the measurement site. In addition, the control unit 160 transmits a control command to the control valve 130 to control the opening and closing of the control valve 130, thereby contracting the cuff 110, thereby controlling the pressure reduction of the measurement site.

In addition, the control unit 160 may filter the signal received from the microphone module 191 to reproduce a waveform that can be used for blood pressure estimation.

In more detail, the controller 160 may regenerate a waveform usable for blood pressure estimation by separating each of the high-frequency band and the low-frequency band from the pressure waveform of the received signal through a preset moving average filter algorithm. .

However, the control unit 160 does not necessarily use only the moving average filter algorithm in the process of filtering the signal received from the microphone module 191, and if necessary, the signal in the frequency band higher than the boundary frequency passes without attenuation and A high pass filter algorithm that attenuates signals in a lower cutoff frequency band and a low pass filter that passes signals in a frequency band lower than the boundary frequency without attenuation and attenuates signals in a cutoff frequency band higher than the boundary frequency. ) Algorithm can be applied selectively.

For example, the controller 160 may be implemented as an array of a plurality of logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory in which a program executable in the microprocessor is stored. Also, the control unit 160 may be implemented in the form of hardware.

Meanwhile, the blood pressure measuring apparatus 100 may further include an oscillometric measuring means capable of measuring blood pressure by sensing a change in pressure of air.

Referring to FIG. 2, the oscillometric measuring means may include an air filter 140 and a pressure sensor 150.

The air filter 140 has a flow path 141 formed therein, and guides the movement of air introduced through the fluid flow line 180 to be described later after being discharged from the first air tank 171, and through this, the pressure of the air. To buffer the air pressure change.

Accordingly, the pressure of the air output from the air filter 140 may be stabilized by removing the pump noise generated when the pump 120 is operated and the air pressure noise generated when the valve is operated.

For example, the air filter 140 may be formed of an elastic material that buffers a pressure change of unstable air introduced into the interior by an elastic force. Here, the elastic body may be applied to at least one of a rubber material having elasticity, a synthetic resin material such as plastic, silicone, urethane, and latex. However, the air filter 140 is not necessarily limited thereto, and may be applied with various materials within conditions capable of performing the same function.

Meanwhile, the flow path 141 formed in the air filter 140 may be formed in a structure capable of moving and staying air so as to maximize a buffering effect.

Referring to FIG. 3, the flow path 141 formed in the air filter 140 may include a direction changing part 141a and a staying part 141b.

The direction changing part 141a is formed to have a size capable of staying for a short period of time compared to the staying part 141b, which will be described later, so that a continuous flow of air may be possible when air is introduced. In addition, the direction changing unit 141a may include at least one bent section to switch the moving direction of the air moving in the linear direction. Accordingly, the direction changing unit 141a may allow the air to remain inside the air filter 140 for a longer time, thereby more efficiently buffering the pressure of the air.

The staying part 141b may be in communication with the direction changing part 141a and delay the flow of air introduced into the interior through the direction changing part 141a to buffer the pressure of the air.

In more detail, the staying portion 141b may be formed in the form of a chamber having a size capable of inflow of more air than the direction changing portion 141a. Accordingly, the air introduced into the staying part 141b may stay in the staying part 141b for a relatively longer time compared to the time passing through the direction changing part 141a and be buffered.

That is, the air introduced into the air filter 140 passes through the flow path 141 of the air filter 140 composed of a plurality of direction changing parts 141a and a plurality of retention parts 141b, and after the unstable pressure is buffered. , It may be discharged toward the pressure sensor 150 to be described later.

However, the flow path 141 formed in the air filter 140 is not necessarily limited thereto, and may be changed and applied in various structures and shapes within conditions capable of performing the same function.

2 and 3, the pressure sensor 150 is connected to the air filter 140 and the output pressure of the air filter 140, that is, the pulse rate and blood pressure discharged through the air filter 140 The pressure change is sensed and the detected signal is transmitted to the controller 160.

For example, the pressure sensor 150 may be applied as an electronic pressure sensor 150 that converts the pressure of air into an electrical signal in a decompression device and outputs an electrical signal corresponding to the pressure. However, the pressure sensor 150 is not necessarily limited thereto, and may include all pressure sensors 150 capable of detecting a pressure change of air discharged from the air filter 140.

In addition, the pressure sensor 150 according to the control command of the control unit 160, before the puff applies pressure to the measurement area of the subject, or the moment the puff applies pressure to the measurement area of the subject, or the pressurization action is stopped. After that, it is possible to detect a pressure change of the air discharged from the air filter 140 in all processes.

In addition, the pressure sensor 150 may detect a change in pressure of air discharged from the air filter 140 for a preset time according to a control command of the controller 160. Here, the time at which the pressure sensor 150 detects a change in pressure of the air may be generally set until arterial blood flow is normally circulated after arterial blood flow has stopped.

That is, the blood pressure measuring device 100 can measure the blood pressure of the subject through the Cortkov method through the first measuring means consisting of the sound detection unit 190 and a plurality of air tanks 170. The blood pressure of the subject can be measured in an oscillometric manner through the second measuring means including the filter 140 and the pressure sensor 150.

In addition, the blood pressure measuring apparatus 100 may further include a fluid flow line 180.

2 and 5, the fluid flow line 180 may include a first fluid flow line 181 and a second fluid flow line 182.

The first fluid flow line 181 connects the cuff 110, the pump 120, the control valve 130, the first air tank 171 and the second air tank 172 to each other to provide a flow path of air. can do. In addition, the second fluid flow line 182 may connect the first air tank 171 and the air filter 140 to each other to provide a flow path for air.

For example, the first fluid flow line 181 and the second fluid flow line 182 are made of rubber or plastic that can be easily deformed in shape so that they can be freely disposed within the housing forming the exterior of the blood pressure measuring device 100 It may be formed in the form of a tube (tube).

In addition, although not shown in the drawing, the blood pressure measuring apparatus 100 may further include a housing, a display unit, an input unit, and a power supply unit.

The housing may form the overall appearance of the blood pressure measuring apparatus 100 and may have a predetermined accommodation space inside to accommodate the above-described components.

For example, the housing may be formed of a plastic, carbon, or metallic material having a predetermined hardness so as to protect the components contained therein and to maintain the same appearance at all times from external impacts or external environmental factors. In addition, the housing may be formed in a form in which a plurality of parts can be fastened through separate fastening means to facilitate maintenance and management. However, the housing is not necessarily limited thereto, and may be changed and applied in various forms.

The display unit is installed in the housing, is formed so that a part is exposed to the outside space, is electrically connected to the control unit 160, and as a result of the estimation through the control unit 160, the status information and inspection of the device identified through the control unit 160 Information, etc. can be displayed in text or images so that the subject or inspector can see it.

For example, the display unit can be applied to electronic displays such as LCD, LED, OLED, PDP, and touch screen. However, the display unit is not limited thereto, and may be applied to a physical output device such as a printer or facsimile.

The input unit may be installed in the housing, and a part may be formed to protrude to the outside of the housing to be exposed to an external space. In addition, the input unit is electrically connected to the control unit 160 and can be manipulated by a person to be measured or an examiner.

That is, the input unit may be configured to transmit a command, such as an operation signal required for operation, an emergency stop, a measured blood pressure, or output of stored related blood pressure information, to the controller 160 through manipulation of a subject or an examiner.

For example, the input unit can be applied to a button, a touch screen, a jog dial, a switch, and all other input devices.

The power supply unit is a device that supplies power required to drive the blood pressure measuring apparatus 100, is electrically connected to the control unit 160, and can supply power to all components through the control unit 160.

For example, the power supply may be applied in the form of a battery or a cord that can be inserted into a socket. However, the power supply is not necessarily limited thereto, and may be applied to various known power supply means.

As described above, according to an embodiment of the present invention, it is possible to remove pump noise and air pressure noise from the air introduced into the cuff 110 and the air discharged from the cuff 110 through the air tank 170 and the sound detection unit 190. Accordingly, it is possible to measure the blood pressure of the subject more accurately by minimizing the measurement error, and improve the reliability of the product.

In addition, as the Cortkov method and the oscillometric method can be applied in parallel or selectively, the blood pressure of the subject can be measured in various ways according to the condition of the subject, thereby increasing the usability of the product, and through each method. Since the measured results can be compared, more accurate blood pressure measurement may be possible.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications are possible by those skilled in the art of course, and these modifications should not be individually understood from the technical idea or perspective of the present invention.

100. Blood pressure measuring device
110. Cuff
120. Pump
130. Control valve
140. Air Filter
141.Euro
141a. Direction changer
141b. Stay
150. Pressure sensor
160. Control unit
170. Air tank
170a. port
170b. main body
170c. Cushioning material
170d. On-off valve
171. The first air tank
172. Second air tank
180. Fluid Flow Line
181. First fluid flow line
182. Second fluid flow line
190. Sound detection unit
191. Microphone module
192. Fluid flow line for noise removal

Claims (8)

A cuff configured to enclose the measurement portion of the subject and expand or contract according to the entry of air to pressurize or release the pressure of the measurement portion of the subject;
A pump configured to supply air to the cuff;
A control valve configured to discharge the air supplied to the cuff and control a flow of the air discharged from the cuff;
A first air tank configured to introduce the air discharged from the cuff into the interior, buffer the pressure of the air introduced into the interior, and discharge the air into the exterior;
A sound detector configured to detect the sound after moving the air discharged from the first air tank to a preset path and controlling a change in sound transmitted through the air; And
A control unit capable of receiving a signal sensed from the sound detection unit and estimating a blood pressure of a subject by using the signal;
Blood pressure measuring device comprising a. The method of claim 1,
A blood pressure measuring apparatus further comprising a second air tank configured to introduce the air discharged from the pump into the interior to buffer the pressure of the air introduced into the interior, and then transmit the air to the cuff. The method of claim 2,
The first air tank and the second air tank,
A plurality of ports through which air can enter;
A main body in communication with the plurality of ports and configured to form a storage space capable of storing air therein;
A buffer material configured to buffer the pressure of the air introduced into the body and the air discharged from the body; And
An on-off valve capable of selectively opening and closing the plurality of ports;
Blood pressure measuring device comprising a. The method of claim 2,
An air filter configured to control a change in pressure of the air by guiding the movement of the air discharged from the first air tank; And
A pressure sensor configured to detect a change in pressure of the air discharged through the air filter;
Blood pressure measuring device further comprising a. The method of claim 4,
A first fluid flow line configured to connect the cuff, the pump, the control valve, the first air tank and the second air tank to each other to provide a flow path of air; And
A second fluid flow line configured to connect the first air tank and the air filter to each other to provide a flow path of air;
Blood pressure measuring device further comprising a. The method of claim 5,
The sound detection unit,
A microphone module configured to convert the sensed sound into an electrical signal and transmit it to the control unit; And
A noise removal fluid flow line configured to connect the first air tank and the microphone module to each other and provide a flow path of air to control a change in sound;
Blood pressure measuring device comprising a. The method of claim 6,
The length of the noise removal fluid flow line is formed longer than the lengths of the first fluid flow line and the second fluid flow line,
The fluid flow line for removing noise is a blood pressure measuring device formed of a plurality of straight sections and a plurality of curved sections. The method of claim 7,
The fluid flow line for removing noise is a blood pressure measuring device capable of bending and adjusting length in horizontal and vertical directions.

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