JP5623955B2 - Sphygmomanometer - Google Patents

Description

  The present invention relates to a sphygmomanometer capable of performing highly reliable blood pressure measurement by guiding a subject to a resting state and making blood pressure measurement conditions constant in blood pressure measurement.

In recent years, with the aging of society, patients with hypertension are increasing. When diagnosing hypertension and prescribing therapeutic drugs, it is necessary to know the patient's exact blood pressure.
However, since the blood pressure value may vary greatly depending on two factors, the measurement environment and the physical condition, it is difficult to know whether or not the measured blood pressure value is an accurate blood pressure value.

  In terms of preparing a measurement environment for measuring a correct blood pressure value, it is preferable to measure blood pressure under the guidance of a doctor or the like in a medical institution. However, since it is a burden on the patient to go to a medical institution every time blood pressure is measured, it is widely used to measure at home using a commercially available sphygmomanometer. The blood pressure measured at home in this way is called home blood pressure.

  Although home blood pressure has the advantage that blood pressure measurement can be easily performed at home, there is a possibility that a doctor or the like will not be taking a measurement by the side, so that a correct measurement environment may not be prepared. Thus, many guidelines for measuring blood pressure correctly at home have been proposed by academic societies and medical institutions.

  By the way, in a recent report, it is said that it is good to measure a blood pressure value a plurality of times under 24 hours free action. This is because it is possible to know the fluctuation of blood pressure value and its fluctuation pattern during the day. The blood pressure measured in this way is called 24-hour blood pressure.

Knowing the 24-hour blood pressure is convenient because it allows you to know the blood pressure fluctuations that the patient does not notice (for example, the rise and fall of the blood pressure value at bedtime), and at the medical institution that treats the patient, This can be reflected in the planning of treatment for the patient.
Since 24-hour blood pressure measures blood pressure over a relatively long time, portability is also important for the blood pressure monitor to be used. And guidelines for the use of such a sphygmomanometer have been published.

Needless to say, in the sense of adjusting the body condition, which is another factor for measuring a correct blood pressure value, it is to make the body rest at the time of blood pressure measurement.
Resting here refers to a physical resting state or a mentally stable state. In other words, the body and spirit are in a relaxed state.

  If the person is in an excited state such as immediately after exercise or is in a mentally tensioned state, the blood vessel contracts, so that the correct blood pressure cannot be measured. In other words, it is better to take a resting state when measuring blood pressure.

  However, if the subject was walking around right before blood pressure measurement, the subject was aware of this, but when physical fatigue or mental stress had accumulated, Often there is no awareness that the subject is not. In such a case, the subject will have an illusion that he is in a resting state and will not actively try to rest before blood pressure measurement.

In this case, even if the subject thinks that the body condition is necessary for correct blood pressure measurement, the correct measurement is not actually performed. For this reason, a sphygmomanometer having a function of guiding the subject to a resting state before blood pressure measurement has been proposed (see, for example, Patent Document 1).

The prior art shown in Patent Document 1 will be described with reference to FIG.
As shown in FIG. 13, the prior art disclosed in Patent Document 1 detects a blood pressure measurement means 300 that measures the blood pressure of a subject and a respiratory signal that includes information indicating the timing of each breath of the subject. A breathing signal detection means 400 is mounted on the cuff 200, and a transmission means 500 for transmitting the breathing timing of the subject to the subject as it is based on the breathing signal detected by the breathing signal detection means 400. I have.

  Furthermore, based on the respiratory signal detected by the respiratory signal detecting means 400, the rest determining means 600 for determining whether or not the subject has been in a resting state, and when the rest determining means 600 determines that the subject is in a resting state. And a control means 700 for starting blood pressure measurement by the blood pressure measurement means 300.

  That is, in the prior art disclosed in Patent Document 1, a respiration signal detection unit 400 detects a respiration signal including information indicating the timing of each respiration of the subject, and the respiration signal is detected based on the respiration signal detected by the transmission unit 500. The timing of each breath of the examiner is transmitted to the subject.

  The subject can know whether or not the patient is in a resting state, and can be guided to the resting state without difficulty, and can start measuring blood pressure in this state, so that the correct blood pressure can be measured.

JP 2010-158289 A (page 4 to page 9, FIG. 2)

  In the conventional technique shown in Patent Document 1, a breathing signal detection means 400 (air pressure detection sensor) is mounted inside the cuff 200, and the subject is attached with the cuff 200 attached to the measurement site and pressurized. Measure respiration. Then, the resting state of the subject is determined using the measured respiratory information.

  However, in this technique, since the respiration signal detecting means 400 is mounted on the cuff 200, respiration can be measured only in a state where the cuff is pressed and pressurized. That is, when knowing the state of the subject before blood pressure measurement, measurement can be performed only in a state where stress is applied.

  As already explained, it is preferable to take a relaxed approach when measuring blood pressure, and if it is in tension, the blood vessels contract and correct blood pressure cannot be measured. Since the conventional technique shown in Patent Document 1 is constrained by the cuff 200, the person being measured is not a little stressed. In this case, it is impossible to correctly know the physical rest state and mental stability state of the measurement subject, and there is a problem that it is not known whether the blood pressure value measured in this state is the correct blood pressure value of the measurement subject. .

  As described above, respiration is detected by the respiration signal detection means 400 mounted on the cuff 200, but it is difficult to accurately detect respiration with the cuff 200 mounted on the arm. In order to detect respiration, it is known to use body movements and carbon dioxide excretion accompanying respiration, but it is difficult to accurately know them in the arm.

Furthermore, the prior art shown in Patent Document 1 suggests that the respiratory signal detection means 400 is installed on a chair, a bed, or the like, or is indirectly attached to the body.
However, specific technical contents are not disclosed, and it is unclear how to measure respiration indirectly using what mechanism. In other words, the idea is only introduced and the technology is not complete.

  An object of the present invention is to provide a sphygmomanometer that can solve the above-described problems and can perform a highly reliable blood pressure measurement by guiding the subject to a resting state without applying stress to the subject.

In order to solve the above problems, the sphygmomanometer of the present invention employs the following configuration.
The sphygmomanometer of the present invention is a sphygmomanometer comprising blood pressure measuring means for measuring the blood pressure of a subject and resting state inducing means for inducing the subject to a resting state from the breathing state of the subject, , A signal processing means for irradiating the subject with microwaves and outputting a change in reflected microwave that has been Doppler-shifted by the subject's breathing motion as respiratory change data, and based on the respiratory change data, Breathing breath identifying means for outputting the actual expiration time and the actual breathing time , and the signal processing means includes a microwave generator and a microwave receiver, and irradiates the subject with microwaves from the microwave generator. A microwave Doppler sensor that outputs a microwave Doppler shift signal based on the reflected microwave that is Doppler shifted by the subject's breathing motion, and a microwave Doppler shift signal are input. A band limitation and the AD unit that outputs a Doppler shift data by analog-digital conversion with limiting the frequency band, characterized by comprising a differential unit for outputting the Doppler shift data as a differential to breathing variation data.

With such a configuration, it is possible to measure the actual exhalation time and inspiratory real time, which are important for determining a resting state by detecting a breathing motion without applying pressure to the body by cuffing and restraining the body. Therefore, it becomes easy to guide the subject to a resting state. Furthermore, the respiratory change data for measuring the expiration time and the inspiration time can be detected correctly, and the respiratory state can be grasped more accurately.

  Further, the breath identification means identifies the expiration and inhalation operations from the polarity change of the breath change data, and outputs a breath waveform identifying unit for outputting the expiration period signal and the inspiration period signal, and the expiration time based on the expiration period signal. You may provide the expiration time measurement part to calculate, and the inhalation time measurement part which calculates inhalation real time based on an inhalation period signal.

  By doing this, it is possible to correctly detect the respiratory change data for measuring the expiration time and the inspiration time, and to grasp the respiratory state more accurately.

  The rest state inducing means determines the stable state of respiration from the subject's actual exhalation time and inspiration real time and outputs it as respiration determination data, and also determines the breathing rest state from the subject's exhalation actual time and inspiration actual time. A respiration determination unit that detects that a predetermined time has elapsed and outputs a blood pressure measurement permission signal; a message selection unit that outputs a respiration navigation message based on respiration determination data; and a notification unit that notifies the respiration navigation message to the outside. You may prepare.

  In this way, the subject can be more quickly and accurately guided to the resting state by the breath navigation message.

  Furthermore, the blood pressure measurement means may include a vital data memory that records vital data including a blood pressure value, a pulse rate, and a respiratory rate and a deviation rate from an appropriate value of the expiration time and the actual inspiration time after the blood pressure measurement is completed. .

  Thus, by recording the vital data and the rate of deviation from the appropriate values of expiration time and actual inspiration time, the history of transition to the subject's resting state is clarified, and the content of breathing navigation is covered. It becomes easy to correct the content more suitable for the examiner.

  Further, the breath navigation message may include a content in which the expiration time is 6 seconds and the inspiration time is 3 seconds.

  In this way, the actual inspiratory time and the expiratory actual time, which are important in determining the timing of breathing, are digitized and managed, so that the blood pressure measurement conditions can be unified.

  The notification means includes a display unit including a vital data display for displaying a blood pressure measurement result by the blood pressure measurement means and a breath navigation message display for displaying a breath navigation message, and a sound report for notifying the breath navigation message by voice. May be provided.

  As a result, the breath navigation message is transmitted to the subject not as visual information based on images but as audio information based on sound, so that the subject may be blind to maintain a rest. Has a low mental burden and can be easily guided to a resting state, and can measure blood pressure with high reliability.

  According to the present invention, since the subject can be guided to a resting state without applying stress, blood pressure can be measured with high reliability.

It is a block diagram which shows the structure of the blood pressure meter by this invention. It is a block which shows the detailed structure of the blood pressure meter by this invention. It is a wave form diagram explaining operation | movement of the blood pressure meter by this invention. It is a flowchart which shows operation | movement of the blood pressure meter by this invention. It is an external view which shows the Example of the display means of the blood pressure meter by this invention. It is an external view which shows the Example of the display part of the blood pressure meter by this invention. It is a typical figure explaining the principle of the blood pressure meter by this invention. It is a typical external view explaining a subject's breathing motion. It is a block which shows the detailed structure in 2nd Embodiment of the blood pressure meter by this invention. It is a wave form diagram explaining operation | movement in 2nd Embodiment of the blood pressure meter by this invention. It is an external view which shows the Example of the display part in 2nd Embodiment of the blood pressure meter by this invention. It is a figure explaining the mode of change of respiration change part data Bf. It is a block diagram explaining the prior art shown in patent document 1. FIG.

  The sphygmomanometer of the present invention uses a microwave Doppler sensor to irradiate the subject's body with microwaves, receives the reflected waves, and analyzes the waveforms to distinguish between exhaled breath and inhaled breathing. Specifically, a switching point between expiration and inspiration (hereinafter referred to as breathing timing) is detected.

If the breathing timing is not appropriate, the voice is instructed to correct the breathing timing, and the exhalation real time, which is the time of exhaling, and the inspiration real time, which is the time of breathing, have a certain value Sometimes, the idea that the subject is in a resting state is used to guide the breathing timing to the above conditions.

  The appropriate breathing timing is a state in which the ratio of the actual expiration time to the actual inspiration time is 1 to 2, and the sum of both times is approximately 9 seconds is physiologically suitable. Has been. Therefore, the appropriate condition is an actual expiration time of about 6 seconds, and an actual expiration time of 3 seconds, which is half that time.

  In addition, such conditions need to be continued to some extent. For this reason, a predetermined duration is set. For example, the ratio of the actual expiration time to the actual inspiration time is 1: 2, and the total actual time is approximately 9 seconds. Suppose.

Thus, since the blood pressure measurement can be performed with the body condition being adjusted before the blood pressure measurement, the blood pressure can be measured with high reliability.
Since microwaves are used for respiration detection, the body is not pressurized with a cuff or the like, and therefore the respiration timing can be measured in a state where no stress is applied to the subject. And since it is non-contact, a respiratory timing can be measured even with clothes.

  As described above, the sphygmomanometer according to the present invention detects the breathing state of the subject using a non-contact means called microwave, and if not breathing properly, induces the breathing timing to rest the subject. It is a great feature that it leads to a state.

  Because it is possible to record the induction method and induction time when inducing to the appropriate breathing timing, the expiration time and the actual time of inspiration and the respiratory rate, know the relationship between the physiological state of the subject and the blood pressure value. This is another feature.

  Further, depending on the medical institution, a medical staff such as a nurse may supervise or instruct the subject to take a deep breath before blood pressure measurement. According to the blood pressure monitor of the present invention, blood pressure measurement is performed. If the subject has not been at rest before, the breathing timing can be corrected to correct this and the blood pressure can be measured after being at rest, so the burden on medical personnel is reduced and highly reliable Blood pressure can be measured.

Hereinafter, the blood pressure monitor of the present invention will be described in detail with reference to the drawings.
The sphygmomanometer 1 has a band-shaped cuff for measuring blood pressure and a sphygmomanometer body equipped with a control circuit, a notification means, etc., and the cuff is a box that is wrapped around the upper arm. Even a so-called upper arm insertion type sphygmomanometer that is housed in a case and improved so that the upper arm can be easily inserted is called a wrist-mounted sphygmomanometer and the cuff and the sphygmomanometer body are integrated. It may have a structured configuration.

  In the following description, a band-shaped cuff and a sphygmomanometer main body are separate and will be described as an example in which the cuff is wound around the upper arm.

  In the description of the embodiments, the drawings will be indicated and described, but the drawings that are not indicated should also be referred to as appropriate. In the drawings, the same numbers are assigned to the components already described.

  Hereinafter, the first embodiment of the sphygmomanometer 1 of the present invention will be described in detail with reference to FIGS. 1 to 8. In the description, the case where the cuff is mainly worn on the left arm is described as an example.

[Principle description of the present invention: FIGS. 7 and 8]
First, with reference to FIG. 7, it will be described in detail how the microwave Doppler sensor is used to guide the subject to a resting state. FIG. 7 is a block diagram schematically showing the principle of the sphygmomanometer.

  In FIG. 7, the microwave Doppler sensor 31 includes, for example, a microwave transmitter 311 that emits a microwave Me of about 2.5 GHz, and a microwave receiver 312 that receives the microwave Mt reflected by the subject 11. And a microwave Doppler demodulator 313.

  Hereinafter, the emitted microwave Me will be referred to as emission microwave Me, and the reflected microwave Mt will be referred to as reflection microwave Mt. When these microwaves are discussed together, they are simply referred to as microwaves M.

  Although the output signal of the microwave Doppler sensor 31 includes an analog signal and a digital signal, in this embodiment, the microwave Doppler shift signal Eo output from the microwave Doppler demodulator 313 is an analog signal. In the following description, the microwave Doppler sensor 31 is not equipped with an AD converter that converts an analog signal into a digital signal.

  In FIG. 7, the microwave microwave Me emitted from the microwave transmitter 311 is partially reflected by the surface of the subject 11, partially enters the subject 11, and is reflected by the inside of the thorax 11 a to be reflected microwaves. It becomes Mt and is received by the microwave receiver 312 again via the subject 11.

  The microwave transmitter 311 outputs a transmission microwave signal Eme that is an electric signal corresponding to the emission microwave Me, and the microwave receiver 312 is a reception microwave that is an electric signal corresponding to the received reflected microwave Mt. The signal Emr is output.

  The microwave Doppler demodulator 313 outputs a phase difference signal between the two signals from the transmission microwave signal Eme and the reception microwave signal Emr as a microwave Doppler shift signal Eo that is an electrical signal.

  That is, since the Doppler shift corresponding to the movement of the inside of the rib cage 11a is generated in the microwave Doppler shift signal Eo, the movement inside the rib cage, that is, the breathing motion can be converted from the Doppler shift signal Eo into an electric signal. It is.

Next, the relationship between the breathing method for reaching a resting state and the present invention will be described with reference to FIG.
FIG. 8 schematically shows movements of the nose, mouth, and thorax when the subject 11 exhales and inhales. FIG. 8A shows a state when exhaling (exhalation), and FIG. 8B shows a state when inhaling (inspiration).

  As shown in FIG. 8 (a), it is considered that exhalation should be exhaled gently from the mouth, and the inside of the rib cage 11a changes so as to exhale. As shown in FIG. 8 (b), it is considered that inhalation is preferably performed in a short time from the nose, and the inside of the rib cage 11a changes so as to take in outside air. Since the shape of the inside of the rib cage 11a changes due to respiration, the basic principle of the present invention is to detect this by using the microwave Doppler sensor 31.

[Description of functional configuration of blood pressure monitor: Fig. 1]
Next, the functional configuration of the sphygmomanometer will be described with reference to FIG.
FIG. 1 is a block diagram showing the main functions of a sphygmomanometer according to the present invention.

In FIG. 1, a sphygmomanometer 1 includes a resting state guiding unit 2 including a signal processing unit 3, a respiratory identification unit 4, a respiratory determination unit 5, a timing unit 7, and a message selection unit 8, a blood pressure measurement unit 6, and a notification. And means 9.

  The rest state inducing means 2 converts the microwave M into respiration change data Bf, which is an electrical signal suitable for arithmetic processing, by the signal processing means 3, and the expiratory real time that reflects the respiration state by the respiration identification means 4. Et and the actual intake time It are output. The breath determination unit 5 inputs these, determines the breathing state, and outputs the breath determination data Kh.

  The respiration determination data Kh output from the respiration determination unit 5 is input to the message selection unit 8, and the message selection unit 8 outputs an appropriate respiration navigation message Kn and is notified to the outside such as the subject by the notification unit 9.

The breath determination unit 5 outputs a blood pressure measurement permission signal Ke and inputs the blood pressure measurement permission signal Ke to the blood pressure measurement means 6, and the blood pressure measurement means 6 receives the blood pressure measurement permission signal Ke and starts blood pressure measurement.
The main elements of the sphygmomanometer 1 have the above functions.

[Detailed Description of Sphygmomanometer 1: FIG. 2]
Next, the detailed configuration and functions of the resting state guiding means 2, blood pressure measuring means 6, and notifying means 9 constituting the sphygmomanometer 1 will be described with reference to FIG.

[Description of Configuration and Function of Resting State Guiding Unit 2]
First, the configuration and function of the signal processing means 3 will be described.
As shown in FIG. 2, the signal processing means 3 includes a microwave Doppler sensor 31, a band limiting / AD unit 32, and a differentiation unit 33.

The microwave Doppler sensor 31 outputs a microwave Doppler shift signal Eo based on the microwave M, and inputs the microwave Doppler shift signal Eo to the band limiting and AD unit 32.
The band limiting / AD unit 32 limits the band of the microwave Doppler shift signal Eo to only a part necessary for signal processing, and then converts an analog signal into a digital signal (hereinafter referred to as AD conversion), and performs Doppler shift data. It outputs as Do and inputs into the differentiation part 33. Note that the first time information T1 input from the timer unit 7 is used as the sampling time necessary for the AD conversion.

  The differentiating unit 33 differentiates the input Doppler shift data Do with respect to time and outputs it as respiration change data Bf.

Next, the configuration and function of the respiratory identification unit 4 will be described.
As shown in FIG. 2, the respiratory identification unit 4 includes a respiratory waveform identification unit 41, an expiration time measurement unit 42, and an inspiration time measurement unit 43.

  The breathing waveform identifying unit 41 is configured to generate a breathing period and a breathing period from the change in polarity of the breathing change data Bf based on the breathing change data Bf output from the differentiation unit 33 of the signal processing unit 3. Are output as an expiration period signal Ep and an inspiration period signal Ip, respectively, and input to the expiration time measurement unit 42 and the inspiration time measurement unit 43.

The expiratory time measuring unit 42 measures the duration of the expiratory period signal Ep from the expiratory period signal Ep and the second time information T2 input from the time measuring unit 7, and outputs it as the actual expiratory time Et. Enter 5.
Similarly, the inspiratory time measuring unit 43 measures the duration of the inspiratory period signal Ip from the inspiratory period signal Ip and the second time information T2, outputs it as the actual inspiratory time It, and inputs it to the respiratory determining unit 5. .

Next, the function of the breath determination unit 5 will be described.
As shown in FIG. 2, the breath determination unit 5 determines the breathing pattern of the subject 11 from the exhalation actual time Et, the inhalation actual time It, and the third time information T3 output from the time measuring unit 7, and the breath determination Data Kh is output.

The breath determination unit 5 is provided with a plurality of data patterns depending on the breathing state of the subject 11. For example:
When exhalation is long and inspiration is short: Respiration determination data Kh1
When inspiration is long and expiration is short: Respiration determination data Kh2
When breathing interval is short: Breathing determination data Kh3

  When the exhalation real time Et and the inspiration real time It satisfy a predetermined condition and continue for a predetermined time, one of the above is selected and output as the breath determination data Kh. Then, the breath determination data Kh is input to the message selection unit 8.

The predetermined condition is, for example, a condition that defines the relationship between the exhalation actual time Et and the inhalation actual time It, and is, for example, 2: 1 in terms of time ratio. The total time of both is 9 seconds.
The data pattern is divided according to which of these conditions the actual expiration time Et and the actual inspiration time It differ.
The predetermined time continuation is defined as how many seconds the time ratio between the exhalation actual time Et and the inhalation actual time It continues, and is, for example, 30 seconds.

For example, the data pattern of the breath determination data Kh is as follows.
Respiratory determination data Kh1: When exhalation real time Et exceeds 6 seconds and inspiration actual time It is less than 3 seconds Respiration determination data Kh2: Inspiration actual time It exceeds 3 seconds and exhalation actual time Et is less than 6 seconds Respiration determination data Kh3: When the sum of the exhalation real time Et and the real time It is 8 seconds or less

  Then, when the breath expiration time Et and the breath inspiration actual time It satisfy a predetermined condition and continue for a predetermined time, the breath determination unit 5 indicates that the subject 11 is in a resting state. Determination data Khn is output. For example, the exhalation real time Et is 6 seconds, the inspiration actual time It is 3 seconds, and this continues for 30 seconds.

Next, the function of the message selection means 8 of the rest state guidance means 2 will be described.
As shown in FIG. 2, when the breath determination data Kh output from the breath determination unit 5 is input, the message selection unit 8 of the rest state guidance unit 2 receives the breath navigation message Kn for causing the subject 11 to rest. Is output.

The breath navigation message Kn receives the breath determination data Kh output from the breath determination unit 5 and outputs, for example, the following data according to the contents.
When exhalation is long and inspiration is short: Respiration navigation message Kn1
When inspiration is long and expiration is short: Respiration navigation message Kn2
When breathing interval is short: Breathing navigation message Kn3
Resting state: Breathing navigation message Knn

The respiratory navigation message Kn is input to the display unit 91 and the sound report unit 92 of the notification unit 9. In the example shown in FIG. 2, the respiration determination data is simply expressed as Kh, and the respiration navigation message is simply expressed as Kn.
Then, the breath determination unit 5 outputs the blood pressure measurement permission signal Ke and inputs it to the blood pressure measurement control circuit 66 of the blood pressure measurement means 6.

Here, the function of the time measuring unit 7 of the resting state guiding means 2 will be described.
As shown in FIG. 2, although not shown, the time measuring unit 7 is a source oscillation clock unit that outputs a clock signal having a predetermined frequency using, for example, a crystal oscillator, and a predetermined frequency division by dividing the clock signal. A frequency dividing circuit that generates a signal, a time generating unit that generates time information from the frequency-divided signal, and the like can be used. Since these configurations are widely known in known timepiece circuits, detailed description thereof is omitted.

The time measuring unit 7 outputs first time information T1, second time information T2, and third time information T3.
The first time information T1 has time information for determining the band limit and the sampling time of the AD unit 33, and is, for example, a signal with a pulse period of 10 msec.

  The second time information T2 is a reference clock for measuring the duration of the expiratory period signal Ep and the inspiratory period signal Ip, and is a pulse signal having a period of 1 msec to 10 msec, for example.

  The third time information T3 is a pulse of 10 to 30 seconds for the breath determination unit 5 to measure whether or not the time ratio between the exhalation actual time Et and the inhalation actual time It continues for a predetermined time. A signal and time information including a date and time when blood pressure measurement is performed.

[Description of Configuration and Function of Blood Pressure Measuring Means 6: FIG. 2]
Next, the configuration and function of the blood pressure measurement means 6 will be described with reference to FIG.
As shown in FIG. 2, the blood pressure measurement means 6 includes a cuff 10, a pressure sensor 61, a pressurization pump 62, a pressurization control unit 63, an exhaust valve 64, an exhaust control unit 65, and a vital data memory 661. The blood pressure measurement control unit 66 including the operation input unit 67 is provided.

  The cuff 10 is a band-shaped member for pressurizing the radial artery of the wrist to prevent blood flow. The pressure sensor 61 converts the pressure of the cuff 10 into an electrical signal and outputs it as a pressure signal So. The pressurizing pump 62 is a pump for pressurizing the cuff 10. The pressurization control unit 63 outputs a pressurization drive signal Kd based on the pressurization control signal Kc from the blood pressure measurement control unit 63 and drives the pressurization pump 62.

  The exhaust valve 64 is a valve for exhausting the pressure of the cuff 10 at a predetermined rate. The exhaust control unit 65 controls the exhaust valve 64 by outputting an exhaust drive signal Hd based on the exhaust control signal Hh from the blood pressure measurement control unit 66.

  The blood pressure measurement control unit 66 calculates vital data Kj such as the maximum blood pressure, the minimum blood pressure, and the pulse rate from the pressure signal So and the blood pressure measurement permission signal Ke, and generally controls and manages the operation of the sphygmomanometer 1. The vital data Kj is also input to the display unit 91 of the notification means 9 described later.

The vital data memory 661 of the blood pressure measurement control unit 66 is a memory means for storing the vital data Kj. For example, a nonvolatile memory device can be used.
The blood pressure measurement control unit 66 is not particularly limited, but it is convenient to configure the blood pressure measurement control unit 66 with a one-chip microcomputer or the like because it is small in size and low in power consumption. At this time, as the vital data memory 661, a memory device mounted on the one-chip microcomputer can be used.

[Description of Configuration and Function of Notification Unit 9: FIGS. 2, 5, and 6]
Next, the structure of the alerting | reporting means 9 is demonstrated using FIG.2, FIG5 and FIG.6.
FIG. 5 is an external view showing an embodiment of the notification means 9.
FIG. 6 is an external view of a breath navigation message display for guiding the subject 11 to rest.

  As shown in FIGS. 2 and 6, the notification unit 9 includes a display unit 91 and a sound report unit 92. Further, the display unit 91 includes a respiratory navigation message display 911 and a vital data display 912.

  As shown in FIG. 6, the breath navigation message display 911 is an instruction screen for instructing the breathing timing for guiding the subject 11 to rest, and includes a time display mark 911 a, a real time display 911 b, and a breathing waveform. It has a graph display 911c that displays Gr, and a guidance screen 911d that can display an image imitating a human face, an exhalation mark Ne, and an inhalation mark Ni. The graph display 911c displays the horizontal axis as real time.

As shown in FIGS. 2 and 5, the vital data display unit 912 includes a maximum blood pressure value display unit 912 s for displaying vital data Kj such as the maximum and minimum blood pressure and the pulse rate output from the blood pressure measuring unit 6, and the minimum It has a blood pressure value display unit 912d and a pulse rate display unit 912p.
Although the display part 91 is not specifically limited, It can be comprised with a liquid crystal display device.

In addition, as shown in FIG. 5, in order to induce the subject 11 to rest calmly, the sound report unit 92 sets the breathing timing by voice or the like such as “please breathe” or “please breathe”. Guidance is given, and if it reaches a resting state, guidance such as “Please keep that breath” is given.
The sound reporting unit 92 can be composed of a dynamic speaker, a piezoelectric acoustic element, or the like.

The sphygmomanometer 1 can perform guidance for proper breathing by characters and graphical notifications by the display unit 91 and voice notification by the reporting unit 92.
As already explained, when the subject 11 is about to rest, if the information to be guided is text, etc., it will become unconscious and nervous, and it will be difficult to rest. There is no time. Since the sphygmomanometer 1 also uses voice guidance from the sound report unit 92, there is no problem even if the display unit 91 is not viewed. In addition, if the display unit 91 is provided, there is no problem in the constitution where the test subject 11 himself is not nervous even if he / she gazes at the object, and information such as breathing timing can be notified to people other than the subject 11. Therefore, the display unit 91 and the reporting unit 92 may be properly used as necessary.

2 and 5 are switches for operating the entire operation of the sphygmomanometer 1. In the example shown in FIG. 5, it is provided in the vicinity of the display unit 91 and the report sound unit 92.
With this operation input unit 67, for example, display by the display unit 91 and voice guidance by the sound report unit 92 can be selected and stopped. The guidance can be selected according to the taste and constitution of the subject 11.

  Since the sphygmomanometer 1 of the present invention can measure the pulse rate and respiration rate, the state of the subject at the time of blood pressure measurement can be recorded together with the measured blood pressure value. The information can be known at any time by the notification means. By doing so, it becomes possible to manage the blood pressure value and the state of the subject, and this is an opportunity to know the health state of the subject and masked hypertension.

[Description of Operation of First Embodiment: FIGS. 3, 12, 4, and 6]
Next, the operation of the first embodiment of the sphygmomanometer 1 will be described with reference to FIGS. 3, 4 and 6.

[Description of Resting State Guiding Unit 2 Operation: FIGS. 3, 12, and 4]
First, the operation of the resting state guiding means 2 will be described.
FIG. 3 is an internal signal waveform diagram illustrating the operation of the sphygmomanometer 1. The vertical axis represents the amplitude of the waveform, and the horizontal axis represents time.

As described above, the microwave Doppler sensor 31 performs band limitation and AD conversion on the microwave Doppler shift signal Eo based on the transmission microwave signal Eme based on the emission microwave Me and the reception microwave signal Emt based on the reflection microwave Mt. To the unit 32.
The microwave Doppler shift signal Eo is extracted by the band limiter and AD unit 32 as a respiratory component, that is, a signal of only a frequency band of 0.03 Hz to 0.5 Hz, converted into a digital signal, and a time series reflecting the respiratory action. It is output as Doppler shift data Do and input to the differentiation unit 33.

For the Doppler shift data Do, the time change rate of the Doppler shift data Do is calculated by the differentiating unit 33 and output as respiration change data Bf. FIG. 3 shows an example of the Doppler shift data Do and the breathing change data Bf when the subject 11 is at rest in an analog expression with the horizontal axis as time.
As described above, the actual expiration time Et is the time when exhaling, and the actual inspiration time It is the time when inhaling.

  Respiration change data Bf obtained by differentiating the Doppler shift data Do representing the movement of the inside of the rib cage 11a represents a change point of the movement inside the rib cage. That is, if the state of change in the respiratory change data Bf at a certain point in time is examined, the respiratory state of the subject 11 can be known.

The reason will be described with reference to FIG.
FIG. 12 shows the transition of the Doppler shift data Do and the respiratory change data Bf when actually breathing. The horizontal axis represents time (seconds), and the vertical axis represents signal amplitude.
When shifting to the operation of sucking and exhaling by the human body, a behavior that vibrates momentarily is shown at the switching point. This is due to the action of exhaling or exhaling the air inside the lungs in order to create a reaction just before the lungs inhale or exhale.
Therefore, the vibration component generated at the switching point between the exhaling operation and the sucking operation is detected as the respiration change data Bf which is a differential signal of the Doppler shift data Do, and the next vibration component is detected after the vibration component is detected. It is possible to measure the actual time of sucking and the actual time of exhaling by measuring the time interval.

  Now, at the respiration timing t1 in FIG. 3, the respiration change data Bf changes the point of amplitude 0 from the “+” direction to the “−” direction. At this point, the change is 0, that is, the movement inside the thorax. It can be said that the breath changed from exhalation to inspiration.

For example, at this breathing timing t1, the subject 11 is informed of “please breathe” and is guided by voice or the like to breathe.
When the inspiration time continues for a certain period and then announcing “please vomit”, the Doppler shift data Do rises with the movement of the thorax interior 11a.
Then, the respiration change data Bf obtained by differentiating the Doppler shift data Do changes the point of the amplitude 0 again from the “−” direction to the “+” direction, and changes from inspiration to expiration at the respiration timing of the respiration timing t2.

The respiration identification unit 4 repeats such an operation, calculates the actual inspiration time It and the actual expiration time Et shown in FIG. 3, and inputs them to the respiration determination unit 5.
When determining that the inspiration actual time It is long and the expiration period signal Et is short, the respiration determining unit 5 outputs respiration determining data Kh that accelerates the respiration timing t2, t4,..., T (2n) shown in FIG. Note that n is a natural number, and the same applies to the following description.

  Further, when the breath determination unit 5 determines that the expiration period signal Et is long and the inspiration actual time It is short, the breath determination data Kh for advancing the breath timings t1, t3,..., T (2n−1) shown in FIG. Output.

The message selection unit 8 inputs the respiration determination data Kh, outputs a respiration navigation message Kn based on the content of the respiration determination data Kh, and inputs it to the display unit 91 of the notification unit 9.
For example, when the breath determination unit 5 outputs the breath determination data Kh for advancing the breath timings t2, t4,..., T (2n), the message selection means 8 guides the user to “Yes, vomit there”. A breath navigation message Kn is output.

The respiratory navigation message Kn is displayed as a graphical picture or character on the respiratory navigation message display 911 and is transmitted to the subject 11 by voice through the sound report unit 92.
Since the subject 11 often closes his eyes in order to keep his / her rest, inducing breathing to the subject 11 by voice is advantageous for keeping his / her rest.

  When detecting that the resting state has continued for a predetermined time based on the expiration period signal Et, the actual inspiration time It, and the third time information T3, the breath determination unit 5 outputs the predetermined breath determination data Kh and outputs the message selection unit 8 To enter.

The message selection means 8 conveys a message for starting blood pressure measurement to the subject 11 by voice, such as “Please wrap the cuff gently”.
The subject 11 wraps the cuff 10 around the upper arm of the left hand, for example, and operates the operation input unit 67 of the blood pressure measurement unit 6 to start blood pressure measurement.

[Description of Blood Pressure Measuring Unit 6 Operation: FIG. 2]
Next, the operation of the blood pressure measurement unit 6 will be described with reference to FIG.
In FIG. 2, when the subject 11 is induced to rest, the breathing determination unit 5 of the resting state guiding means 2 outputs the breathing determination data Khn indicating that the subject 11 has been guided to rest, and the blood pressure measurement permission signal Ke. Is input to the blood pressure measurement control unit 66 of the blood pressure measurement means 6.

  The message selection means 8 inputs the respiration determination data Khn and outputs, for example, a respiration navigation message Knn indicating that a resting state has been reached. "Please roll a cuff."

  The blood pressure measurement control unit 66 of the blood pressure measuring means 6 starts blood pressure measurement as follows. That is, a pressurization control signal Kc is output to the pressurization control unit 63, and the pressurization pump 62 pressurizes the cuff 10 in response to the pressurization drive signal Kd output from the pressurization control unit 63.

  The pressure of the cuff 10 is output to the blood pressure measurement control unit 66 every moment by the pressure sensor 32. When the cuff 10 is pressurized to a predetermined pressure, the blood pressure measurement control unit 66 controls the pressurization control unit 63 to pressurize. The operation of the pump 62 is stopped.

  The blood pressure measurement control unit 66 outputs an exhaust control signal Hh to the exhaust control unit 65, and the exhaust control unit 65 outputs an exhaust drive signal Hd for controlling the exhaust valve 64 to the exhaust valve 64 based on the exhaust control signal Hh.

  The exhaust valve 64 exhausts the cuff 10 based on the exhaust drive signal Hd so that the pressure of the cuff 10 decreases at a constant rate with respect to time.

  When the pressure of the cuff 10 gradually decreases, a pressure vibration waveform (not shown) based on the so-called oscillometric theory is generated in the cuff 10 according to the blood pressure of the subject 11, and this is detected by the pressure sensor 61.

  The blood pressure measurement control unit 66 stores the maximum blood pressure value, the minimum blood pressure value, the pulse rate, and the like as vital data Kj in the memory 661 of the blood pressure measurement control unit 66 from the pressure vibration waveform of the pressure signal So of the pressure sensor 61 and notifies the blood pressure. The data is output to the display unit 91 of the means 9.

Next, monitoring of proper breathing timing during blood pressure measurement will be described.
During the blood pressure measurement, the breathing timing of 11 may change and the resting state may not be maintained.

  For example, if the breathing is disturbed in the middle of the measurement and deviates from an appropriate breathing timing, the measured blood pressure value is not reliable. When the subject unintentionally raises a state such as breathing out in this way, even if the subject himself intends to measure the correct blood pressure, the blood pressure is actually measured incorrectly.

  In order to avoid such a situation, the sphygmomanometer 1 can continue monitoring the respiratory state of the subject 11 even after the subject's 11 breathing is at an appropriate breathing timing and blood pressure measurement is started. It is.

  That is, even when the blood pressure measurement is started, the expiration actual time Et and the inspiration actual time It are monitored, and the ratio between the expiration expiration time Et and the inspiration actual time It is 2 to 1, or the expiration expiration time Et + The actual intake time It is approximately 10 seconds, that is, the respiration determination unit 5 continues to monitor whether the respiration rate per minute is an appropriate value of around 6 times.

When the breathing timing of the subject 11 is changed, the notification means 9 is used to notify.
For example, it is informed that “please breathe out slowly” or the like, and the breathing timing t (2n−1) shown in FIG. 3 is delayed, or “please breathe in a little more slowly”, etc. To induce.

In addition, the blood pressure measurement can be interrupted when there is a significant change from the proper breathing timing.
For example, if the expiratory real time Et and the inspiratory real time It deviate to such an extent that it is difficult to induce the subject 11 to rest, as the ratio of the expiratory real time Et to the inspiratory real time It is 1: 2. The blood pressure measurement is interrupted by, for example, informing that “the blood pressure measurement is stopped”.

By the way, it is not the blood pressure measurement at an appropriate breathing timing for the convenience of the subject, but there is a case where the user wants to know the blood pressure value anyway.
In that case, the blood pressure measurement can be forcibly started by operating the operation input unit 67 of the blood pressure measurement means 6 or the like to input the predetermined information Ds.

[Description of Operation Flow: FIGS. 2, 4, and 6]
Next, an operation flow of blood pressure measurement by the sphygmomanometer 1 will be described in detail mainly using FIG.
FIG. 4 is a flowchart for explaining the operation from when the breathing timing is adjusted by the sphygmomanometer 1 to the resting state until the cuff is wound around the upper arm and the blood pressure measurement is started and ended. Hereinafter, operation steps are abbreviated as S1, S2,..., Sn.

  First, the subject 11 operates the operation input unit 67 of the blood pressure measurement unit 6 to bring the blood pressure monitor 1 into an operating state. From the sphygmomanometer 1, the microwave M is transmitted and received to the subject 11, and the monitoring of the breathing timing is started by the resting state guiding means 2, and an announcement such as “please breathe according to the instruction” flows. After that, as shown in FIG. 6, the induction of the breathing timing is started by the person's face graphically expressed on the guidance screen 911d of the breath navigation message display 911, the breath mark Ne, and the breath mark Ni.

In the example shown in FIG. 6, the graphical representation of the person's face on the instruction screen 911 d of the message display 911 opens his mouth, turns on the exhalation mark Ne, and prompts the subject 11 to exhale. In the time display bar graph 911a, the bar graph indicates how long the breath is exhaled. (S1)
The subject 11 adjusts the breathing timing according to the instruction.

  The exhalation real time Et and the inhalation real time It are measured for each breath of the subject 11, and the real time display 911b of the message display 911 displays the time of exhaling, that is, the exhalation real time Et and the breath in real time. Since the breathing waveform Gr, which is the real-time waveform of the microwave Doppler shift signal Eo, is displayed on the graph display 911c, the subject 11 is required to breathe. The timing can be easily grasped. (S2)

  Then, the expiration actual time Et and the inspiration actual time It are guided so as to be appropriate. Specifically, first, the exhalation mark Ne on the instruction screen 911d is lit on the subject 11, and how long is the exhalation time currently on the time display bar graph 911a, and how long will it continue to exhale? Is communicated in an easy-to-understand manner. (S3)

The instruction and monitoring are continued so that the actual expiration time Et and the actual inspiration time It are in an appropriate state, for example, the actual expiration time Et is 6 seconds and the actual inspiration time It is 3 seconds. For example, if it continues for 30 seconds, the sounding unit 92 notifies the subject 11 of a voice message “Start blood pressure measurement.
In addition, this duration can be selected in the range of 5 seconds to 50 seconds, for example, according to the state of the subject 11.

  Further, as a resting condition, the ratio of the actual expiration time Et to the actual inspiration time It is 2 to 1, and the sum of the actual expiration time Et and the actual inspiration time It is 9 to 10 seconds, that is, the respiration rate per minute is It may be induced under a relaxed condition by giving a range to the numerical value so as to be about 6 times. (S4)

Next, the subject 11 wraps the cuff 10 of the sphygmomanometer 1 around the upper arm and operates the operation input unit 67 of the blood pressure measuring means 6 to start blood pressure measurement. Then, the blood pressure is measured by the blood pressure measurement control unit 66.
Respiration monitoring is also performed during blood pressure measurement, but since the operation has already been described, redundant description is omitted. (S5)

  The vital data Kj such as the maximum blood pressure value, the minimum blood pressure value, and the heart rate measured by the blood pressure measurement control unit 66 is displayed on the display unit 91, and the vital data Kj, the expiration actual time Et, and the actual inspiration time It are displayed. The deviation rate K from the appropriate value is stored in the vital data memory 661 of the blood pressure measurement control unit 66, and the measurement ends. (S6)

  As described above, the subject 11 is guided to a resting state by the sphygmomanometer 1, and the blood pressure value at that time is stably measured. Therefore, the body condition which is one of the conditions for performing correct blood pressure measurement is determined. The blood pressure can be measured. The disadvantage of the prior art that blood pressure values fluctuate depending on environmental conditions and physical conditions and it is difficult to accurately measure blood pressure values is overcome.

[Explanation of Effects of First Embodiment]
Here, the effects of the first embodiment will be summarized.
Until now, electronic sphygmomanometers have had the problem that measured values vary greatly due to two factors, the measurement environment and the physical condition.
In order to solve this problem, the conventional electronic sphygmomanometer was designed to detect the respiratory state by providing a breath detection means in the cuff. Not only was the measurement difficult, but in the first place, when the cuff was wound and the pressure was applied, the subject felt stress and could not measure blood pressure correctly.

  However, according to the sphygmomanometer of the present invention, the respiratory state of the subject is non-contact by the microwave and can be induced to a resting state without applying stress to the subject. Blood pressure measurement can be realized.

[Description of Second Embodiment of Blood Pressure Monitor: FIGS. 9, 10, and 11]
Next, a second embodiment of the sphygmomanometer will be described using FIG. 9, FIG. 10, and FIG.
The sphygmomanometer 100 according to the second embodiment detects the movement of the subject's heart with microwaves when performing rest guidance, and notifies the subject 11 of the change in heart rate, thereby notifying the subject 11. Effective feedback is provided to increase the effect of rest induction. In addition, the description which overlaps with 1st Embodiment is abbreviate | omitted.

  FIG. 9 is a functional block diagram showing a part of the configuration of the sleep apnea determination apparatus 100. The signal processing means 3a includes an FFT unit 34 and a heart rate extraction unit 35 in the first embodiment. And different.

FIG. 10 is a waveform diagram for explaining the operation of the FFT unit 34 and the heart rate extraction unit 35 of the signal processing means 3a.
FIG. 11 is an external view of a respiration message display 911 in which a heart rate transition graph Pg that represents a change in heart rate is newly added to the graph display 911 c that displays a respiration navigation message.

  In FIG. 9, the FFT unit 34 of the signal processing means 3a receives the Doppler shift data Do and performs FFT (Fast Fourier Transform: hereinafter abbreviated as FFT) processing. That is, the accumulated Doppler shift data Do is subjected to Fourier transform and decomposed into individual signal components, and then processing for representing each component on the frequency spectrum is performed to output the frequency spectrum data Fs of the Doppler shift data Do. The accumulation time of the Doppler shift data Do at this time is, for example, 10 to 30 seconds. Note that this time may be created and input by the timer 7.

Further details will be described with reference to FIG.
In FIG. 10, FIG. 10A is an analog representation of the time series change of the Doppler shift data Do, the horizontal axis is the elapsed time, and the vertical axis is the amplitude of the Doppler shift data Do.

  FIG. 10B shows the frequency spectrum data Fs that is the output of the FFT unit 34 of the signal processing means 3a, the horizontal axis is the frequency, and the vertical axis is the intensity of the frequency spectrum.

  As shown in FIG. 10B, the frequency spectrum data Fs includes two pieces of physiological information of the subject 11, that is, heart rate spectrum data Sf that is a frequency component based on the heartbeat and a frequency component based on the breathing motion. The frequency range Zp of the heart rate spectrum data Sf is, for example, 0.5 Hz to 3 Hz, and the frequency range Zr of the respiratory spectrum data Kf is, for example, 0.05 Hz to 0.5 Hz. It is.

The heart rate extraction unit 35 extracts the heart rate spectrum data Sf from the two physiological information of the subject 11 included in the frequency spectrum Fs, converts it into the heart rate of the subject 11, and outputs it as the initial heart rate Hrb. .
Since the heart rate spectrum data Sf is a frequency representing the repeatability of the heart rate, it can be converted to a one-minute heart rate by multiplying by 60.

Further, “initial” of the initial heart rate Hrb means a heart rate that is initially measured prior to blood pressure measurement.
The initial heart rate Hrb output from the heart rate extraction unit 35 is input to the graph display 911 c of the display unit 91. The graph display 911c represents the change in the numerical value of the initial heart rate Hrb output from the heart rate extraction unit 35 in an analog manner by a curve.

The situation will be described with reference to FIG. 11. A heart rate transition graph Pg is displayed on the 911c of the respiratory navigation message display 911 in addition to the respiratory waveform Gr, and the subject 11 grasps his / her heart rate change. can do.
As in the first embodiment, since the sphygmomanometer 100 guides the subject 11 to be at rest, the heart rate transition graph Pg also gradually becomes a resting heart rate. For example, even if it is assumed that the subject 11 is resting, if the change in the heart rate transition graph Pg is such that the heart rate increases, the consciousness of the subject 11 and the actual body You can see the difference in appearance.

[Explanation of Effects of Second Embodiment]
Here, the effects of the second embodiment will be summarized.
The most important point of the sphygmomanometer 100 of the second embodiment is that the heart rate can be monitored simultaneously with breathing. Since the subject 11 can recognize that the heart rate is decreased or increased due to breathing, the subject 11 can shift to a resting state more quickly and can measure blood pressure with high reliability.

  As mentioned above, the blood pressure monitor of the present invention has been described with two embodiments. However, the sphygmomanometer of the present invention is not limited to this, and it is needless to say that the sphygmomanometer can be arbitrarily changed as long as it satisfies the gist of the present invention.

  Since the sphygmomanometer of the present invention can be guided to an appropriate breathing timing without applying stress to the subject, the blood pressure value correct for the subject can be measured. For this reason, it is suitable as a blood pressure meter for home blood pressure as a more accurate blood pressure meter. It is also suitable as a sphygmomanometer when measuring blood pressure under the guidance of a doctor in a medical institution.

DESCRIPTION OF SYMBOLS 1 Sphygmomanometer 2 Resting state induction | guidance | derivation means 3, 3a Signal processing means 31 Microwave Doppler sensor 311 Microwave transmitter 312 Microwave receiver 313 Microwave Doppler demodulator 32 Band limitation / AD part 33 Differentiation part 34 FFT part 35 Heart rate Extraction unit 4 Respiratory identification unit 41 Respiratory waveform identification unit 42 Expiration time measurement unit 43 Inspiratory time measurement unit 5 Respiratory determination unit 6 Blood pressure measurement unit 61 Pressure sensor 62 Pressurization pump 63 Pressurization control unit 64 Exhaust valve 65 Exhaust control unit 66 Blood pressure measurement control unit 661 Vital data memory 67 Operation input unit 7 Timing unit 8 Message selection unit 9 Notification unit 91 Display unit 911 Respiration navigation message display unit 911a Time display bar graph 911b Real time display unit 911c Graph display unit 911d Guidance screen 912 Vital Data display unit 92 Reporting section 10 11 Subject 11a Thoracic internal Me Emitted microwave Mt Reflected microwave Et Expiration actual time Ep Expiration period signal It Inhalation period signal Kh Inhalation period signal Kh Respiration determination data Kj Vital data Kf Respiration spectrum data Sf Heart rate spectrum data K Deviation rate Ke Blood pressure measurement permission signal Ne Exhalation mark Ni Inhalation mark Kn Respiration navigation message Bd Vital data Gr Respiration waveform Pg Heart rate transition graph Eme Transmission microwave signal Emt Reception microwave signal Eo Microwave Doppler shift signal Do Doppler shift data Bf Respiration change data Bf
So pressure signal Kc pressurization control signal Hc exhaust control signal Fs frequency spectrum data Hrb initial heart rate Kd pressurization drive signal Hd exhaust drive signal Zp (heart rate) frequency band Zr (respiration) frequency band T1 first time information T2 Second time information T3 Third time information t1, t2,..., Tn Respiration timing

Claims (6)

In a sphygmomanometer comprising a blood pressure measuring means for measuring the blood pressure of the subject and a resting state inducing means for guiding the subject to a resting state from the breathing state of the subject,
The resting state inducing means includes
A signal processing means for irradiating the subject with microwaves and outputting a change in reflected microwave that has been Doppler-shifted by the subject's breathing motion as respiratory change data;
Breathing air identifying means for outputting the actual expiration time and inhalation actual time of the subject based on the respiratory change data ,
The signal processing means includes
A microwave Doppler shift signal comprising a microwave generator and a microwave receiver, wherein the microwave is irradiated from the microwave generator to the subject and Doppler shifted by the subject's breathing motion. A microwave Doppler sensor that outputs
Band limiting and AD unit for inputting the microwave Doppler shift signal to limit the frequency band and converting it from analog to digital and outputting it as Doppler shift data;
A sphygmomanometer comprising a differentiating unit for differentiating the Doppler shift data and outputting the respiration change data .
The respiratory identification means
A breathing waveform identifying unit that identifies an exhalation operation and an inspiration operation from the polarity change of the respiratory change data, and outputs an expiration period signal and an inspiration period signal;
An expiration time measuring unit for calculating the expiration time based on the expiration period signal;
An intake time measuring unit that calculates the actual intake time based on the intake period signal;
The sphygmomanometer according to claim 1 , comprising:
The resting state inducing means includes
A stable breathing state is determined from the exhalation real time and the inspiration real time of the subject and output as respiration determination data, and a breathing rest state is determined from the exhalation real time and the inspiration real time of the subject. A respiration determining unit that detects that the predetermined time has continued and outputs a blood pressure measurement permission signal;
Message selection means for outputting a breath navigation message based on the breath determination data;
Informing means for informing the breath navigation message to the outside,
The sphygmomanometer according to claim 2 , comprising:
The blood pressure measuring means includes
Vital data memory that records the vital data consisting of blood pressure value, pulse rate and respiratory rate after the completion of blood pressure measurement, and the rate of deviation from the appropriate value of the expiration time and the actual time of inspiration,
The sphygmomanometer according to claim 3 , comprising:
5. The sphygmomanometer according to claim 4 , wherein the breath navigation message includes a content in which the expiration time is 6 seconds and the inspiration time is 3 seconds.
The notification means includes
A display unit comprising a vital data display for displaying a blood pressure measurement result by the pressure measuring means and a respiratory navigation message display for displaying the respiratory navigation message; a sounding unit for notifying the respiratory navigation message by voice;
The sphygmomanometer according to claim 5 , comprising:

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