JPH10314127A - Bloodless sphygmomanometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid giving pressure and unpleasentness caused by fastening to an examine indirectly estimating the blood pressure of the examine through the use of an acceleration pulse wave reflecting the state of the blood circulating system of a human body to eliminate adding pressure of not smaller than a highest blood pressure value to a measuring part through the use of a cuff. SOLUTION: A pulse wave detecting means 11 is fixed to the finger 16 of a hand with a fixture, a light emitting element 11a radiates light, a light receiving element 11b selectively receives the transmitted light of a wavelength band hemoglobin selectively absorbs and a converting circuit 11c converts it into an electrical signal. Then a waveform dividing means 12 divides it to the waveform of time corresponding to one period of the pulse of a heart and an acceleration pulse wave output means 13 differentiates them twice to calculate the acceleration of the pulse wave and outputs it to a blood pressure value arithmetic means 14. When the output of the means 12 or 13 continues meeting some condition in a fixed period, the resting state detecting means 14e of the means 14 judges that the examine is in a resting state, and informs the examine or a third party of a blood pressure value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-invasive blood pressure monitor for non-invasively measuring the blood pressure of a human body.

[0002]

2. Description of the Related Art A conventional non-invasive sphygmomanometer of this type has a configuration as described in, for example, Japanese Patent Application Laid-Open No. 5-49604. FIG. 4 shows a configuration diagram of a conventional non-invasive blood pressure monitor.

In FIG. 4, reference numeral 1 denotes a main body of a non-invasive sphygmomanometer. The main body 1 includes a display 2 such as a liquid crystal display for displaying a measurement result and the like, power on of the apparatus, start of measurement, power off. A switch 3 for instructing the operation is provided. Reference numeral 4 denotes a connector which engages with the insertion opening of the main body to attach the armband tube 5 to the main body. Reference numeral 6 denotes a cuff, which is pressurized by air that is wound around the arm of the subject and sent through the arm band tube 5 at the time of measurement, and the air is released by opening an exhaust valve in the main body to make the arm band open. It is discharged to the outside via the tube 5 and contracts. Reference numeral 7 denotes a microphone for detecting the Korotkoff sound of the subject, which is connected to a processing circuit in the main body through the arm band tube 5 and the connector 4.

When the subject measures the blood pressure, the cuff 6 is wound around a predetermined position on the arm and the switch 3 is pressed to start the measurement. When the measurement is started, air pressurized by a pressurizing pump (not shown) provided in the main body 1 is provided. Is sent to the cuff 6 through the cuff tube 5 and pressurization is started, and pressurization is performed until the internal pressure of the cuff 6 reaches a preset pressure value. When the pressurization is completed, the exhaust valve in the main body is opened and pressure reduction is started. When the internal pressure of the cuff 6 falls below the subject's maximum blood pressure, a Korotkoff sound starts to be generated. Disappears. The occurrence and disappearance of this Korotkoff sound are detected by the microphone 7 and the pressure of the cuff 6 at that time is detected, whereby the systolic blood pressure and the diastolic blood pressure are determined. The blood pressure value thus determined is displayed on the display 2 of the main unit 1.
And the measurement result is notified to the subject or a third party.

[0005]

However, in the conventional non-invasive sphygmomanometer, it is necessary to apply a pressure equal to or higher than the systolic blood pressure value to the measuring section using a cuff. There is a drawback that it gives a feeling of oppression or discomfort.

[0006]

In order to achieve the above object, a non-invasive sphygmomanometer according to the present invention detects a pulse wave generated by circulation of blood of a human body and outputs a signal corresponding to the magnitude of the pulse wave. Pulse wave detecting means for outputting, a waveform dividing means for dividing an output signal of the pulse wave detecting means into a waveform having a time corresponding to a cycle of a heart beat, and an output waveform of the waveform dividing means obtained by differentiating twice. Acceleration pulse wave output means for calculating and outputting the acceleration pulse wave obtained, and the systolic blood pressure value of the human body based on the information obtained from the output of the waveform division means and the acceleration pulse wave output by the acceleration pulse wave output means, A blood pressure value, a blood pressure value calculating means for calculating and outputting at least one of the diastolic blood pressure values, and a notifying means for notifying a subject or a third party of an output of the blood pressure value calculating means, wherein the blood pressure value calculating means comprises: The subject whose blood pressure value is detected is at rest Has a resting state detecting means for detecting that a state, the notifying means notifies the blood pressure value in the subject or a third party after said resting state detecting means determines that the subject is resting state.

According to the above invention, the blood pressure of the subject is indirectly estimated using the acceleration pulse wave reflecting the state of the blood circulation system of the human body. A non-invasive sphygmomanometer that does not need to be added and does not give a subject a feeling of pressure or discomfort due to tightening can be provided.

Further, according to the present invention, since the resting state detecting means notifies the blood pressure value calculated when confirming that the subject whose blood pressure value is to be detected is in a resting state, it greatly influences the estimation of the blood pressure value. A non-invasive sphygmomanometer can be provided which can calculate a blood pressure value from a waveform in a resting state with no human body movement giving a more accurate calculation of the blood pressure value.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A non-invasive sphygmomanometer according to claim 1 of the present invention detects a pulse wave generated by circulating blood of a human body and outputs a signal corresponding to the magnitude of the pulse wave. Detecting means, a waveform dividing means for dividing an output signal of the pulse wave detecting means into a time waveform corresponding to a period of a heartbeat, and an acceleration pulse wave obtained by differentiating the output waveform of the waveform dividing means twice. Acceleration pulse wave output means to calculate and output, the systolic blood pressure value of the human body based on information obtained from the output of the waveform division means and the acceleration pulse wave output by the acceleration pulse wave output means,
An average blood pressure value, a blood pressure value calculating means for calculating and outputting at least one of the diastolic blood pressure values, and a notifying means for notifying a subject or a third party of an output of the blood pressure value calculating means, wherein the blood pressure value calculating means Has a resting state detecting means for detecting that the subject who is detecting the blood pressure value is in a resting state, the notifying means, after the resting state detecting means determines that the subject is in a resting state, the blood pressure value to the subject or the second Notify the three.

Since the blood pressure of the human body is indirectly estimated using the acceleration pulse wave reflecting the state of the blood circulation system of the human body, it is not necessary to apply a pressure higher than the maximum blood pressure value to the measuring unit using the cuff. In addition, the subject does not feel pressure or discomfort due to tightening. Furthermore, since the resting state detecting means notifies the calculated blood pressure value when the subject who is to measure the blood pressure value confirms that the subject is in a resting state, there is no human body movement that greatly affects the estimation of the blood pressure value. A non-invasive sphygmomanometer that can calculate a blood pressure value from a waveform in a resting state and that can accurately calculate a blood pressure value can be provided.

In the non-invasive sphygmomanometer according to the second aspect of the present invention, the resting state detecting means is configured such that the subject rests when the output of the waveform dividing means or the acceleration pulse wave output means satisfies a predetermined condition. Is determined.

Since the resting state detecting means detects whether or not the subject is in a resting state from the output of the waveform dividing means or the acceleration pulse wave outputting means, the resting state of the subject can be surely provided without separately providing a detecting means therefor. The state can be detected.

According to a third aspect of the present invention, there is provided a non-invasive sphygmomanometer for detecting a pulse wave generated by circulating blood of a human body and outputting a signal corresponding to the magnitude of the pulse wave. A waveform dividing means for dividing an output signal of the pulse wave detecting means into a waveform having a time corresponding to a cycle of a heartbeat; and calculating an acceleration pulse wave obtained by differentiating the output waveform of the waveform dividing means twice. Acceleration pulse wave output means to output, the systolic blood pressure value of the human body based on information obtained from the output of the waveform division means and the acceleration pulse wave output by the acceleration pulse wave output means,
An average blood pressure value, a blood pressure value calculating means for calculating and outputting at least one of the diastolic blood pressure values, and a notifying means for notifying a subject or a third party of an output of the blood pressure value calculating means, wherein the blood pressure value calculating means The waveform selecting means has a waveform selecting means for selecting a waveform used to measure a blood pressure value from the obtained waveform, and the waveform selecting means has a predetermined output waveform of the waveform dividing means or the acceleration pulse wave output means. If the condition is not satisfied, the output waveform at that time is not used for estimating the blood pressure value.

Since the blood pressure of the human body is indirectly estimated using the acceleration pulse wave reflecting the state of the blood circulation system of the human body, there is no need to apply a pressure higher than the maximum blood pressure value to the measuring unit using the cuff. Does not give the subject any feeling of pressure or discomfort due to tightening. Furthermore, since the waveform selecting means can discriminate the pulse wave affected by the body movement of the human body which has a great influence on the estimation of the blood pressure value, and can not use the pulse wave for the estimation of the blood pressure value, it is possible to collect the pulse wave. A non-invasive sphygmomanometer capable of minimizing the influence on the calculation of the blood pressure value even if the subject's body movement temporarily occurs.

In the non-invasive sphygmomanometer according to a fourth aspect of the present invention, the blood pressure value calculating means calculates the blood pressure value from the information of the waveform dividing means and the acceleration pulse wave output means at a certain time, and calculates the calculation result. Is output to the notifying means, and then the calculation of the blood pressure value is repeated using the information of the waveform dividing means or the acceleration pulse wave output means at the next time, and the calculation result is calculated every time a new calculation result is obtained. Output to notification means.

In a sphygmomanometer that continuously informs a subject's blood pressure value, a pulse wave accompanied by a body movement of a human body that has a great influence on the estimation of the blood pressure value is determined, and is not used for the estimation of the blood pressure value. Therefore, even if the subject's body movement temporarily occurs while continuously measuring the blood pressure value, the influence of the body movement can be minimized, and a more accurate continuous measurement can be realized. A non-invasive sphygmomanometer can be provided.

According to a fifth aspect of the present invention, in the non-invasive sphygmomanometer, the notifying means has a storage means, wherein the storing means stores a calculation result output from the blood pressure value calculating means, and wherein the notifying means includes: All or a part of the content stored in the storage means is notified to a subject or a third party together with temporal information.

Further, it is possible to provide a non-invasive sphygmomanometer capable of recognizing a temporal transition at a glance. Further, claim 6 of the present invention
In the non-invasive sphygmomanometer according to the above, the rest state detecting means obtains the maximum value, the minimum value or the amplitude of the output signal of the acceleration pulse wave output means by calculating from the output waveform of the pulse wave detecting means or the waveform dividing means. When it is not within the range, it is determined that the predetermined condition is not satisfied.

Even when a relatively high frequency component is superimposed on the pulse wave signal detected by the pulse wave detecting means due to a change due to body movement, the maximum value, the minimum value, or the amplitude of the acceleration pulse wave is obtained. Is calculated from the waveform of the pulse wave and is compared with the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means, so that the relatively high frequency component of the human body is determined. Body movement can be detected easily and reliably,
It is possible to reliably determine whether or not the human body is at rest.

In the non-invasive sphygmomanometer according to claim 7 of the present invention, the waveform selecting means determines whether the maximum value, the minimum value or the amplitude of the output signal of the acceleration pulse wave output means is equal to the pulse wave detecting means or the waveform. When it is not within the range calculated from the output waveform of the dividing means, it is determined that the predetermined condition is not satisfied.

[0021] Even if a relatively high frequency component is superimposed on the pulse wave signal detected by the pulse wave detecting means due to a change due to body movement, the maximum value, the minimum value, or the amplitude of the acceleration pulse wave is obtained. Is calculated from the waveform of the pulse wave and compared with the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means. A signal affected by high-frequency components can be easily and reliably detected, and a non-invasive blood pressure monitor with less error due to body movement can be realized.

According to a non-invasive sphygmomanometer according to claim 8 of the present invention, the resting state detecting means determines whether the maximum value or the minimum value of the output signal of the acceleration pulse wave output means is present at the output of the waveform dividing means. When the time is not within the time range calculated from the waveform, it is determined that the predetermined condition is not satisfied.

Even when the pulse wave signal detected by the pulse wave detecting means is changed by the body movement of the human body to change the waveform pattern of the acceleration pulse wave, the appearance of the maximum value or the minimum value of the acceleration pulse wave Is calculated from the waveform of the pulse wave, and this is compared with the present time of the maximum value or the minimum value obtained from the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means. Therefore, the body movement of the human body can be easily and reliably detected, and it can be reliably determined whether or not the human body is in a resting state.

According to a ninth aspect of the present invention, in the non-invasive sphygmomanometer according to the ninth aspect, the waveform selecting means determines whether the maximum value or the minimum value of the output signal of the acceleration pulse wave output means is present at the output waveform of the waveform dividing means. It is determined that the predetermined condition is not satisfied when the time is not within the time range calculated from the waveform.

[0025] Even if the pulse wave signal detected by the pulse wave detecting means is changed by the body motion of the human body and the waveform pattern of the acceleration pulse wave is changed, the appearance of the maximum value or the minimum value of the acceleration pulse wave is generated. Is calculated from the waveform of the pulse wave, and this is compared with the present time of the maximum value or the minimum value obtained from the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means. Therefore, the signal affected by the body movement of the human body can be easily and reliably detected, and a non-invasive sphygmomanometer having few errors due to the body movement of the human body can be realized.

According to a tenth aspect of the present invention, in the non-invasive sphygmomanometer according to the present invention, the resting state detecting means determines that the output waveform of the acceleration pulse wave output means at the current time corresponds to a plurality of cycles earlier than the current time. If the value is out of the range calculated from the plurality of output waveforms of the pulse wave output means, it is determined that the predetermined condition is not satisfied.

Even when the pulse wave signal detected by the pulse wave detecting means is changed by the body motion of the human body and various noises are superimposed on the waveform of the acceleration pulse wave, a single or a single waveform of the acceleration pulse wave is obtained. The normal range at a plurality of time points is calculated from a plurality of output waveforms of the acceleration pulse wave output means corresponding to a plurality of cycles before the present time, and the actual range of the acceleration pulse wave output by the acceleration pulse wave output means is calculated. Since the determination is made by comparing with the waveform, the body movement of the human body can be easily and reliably detected, and it can be reliably determined whether or not the human body is in a resting state.

[0028] In the non-invasive blood pressure monitor according to claim 11 of the present invention, the waveform selecting means may be configured so that the output waveform of the acceleration pulse wave output means at the present time corresponds to a plurality of cycles earlier than the present time. If it is out of the range calculated from the plurality of output waveforms of the wave output means, it is determined that the predetermined condition is not satisfied.

Even if the pulse wave signal detected by the pulse wave detecting means is changed by the body motion of the human body and various noises are superimposed on the waveform of the acceleration pulse wave, a single or a single waveform of the acceleration pulse wave is obtained. The normal range at a plurality of time points is calculated from a plurality of output waveforms of the acceleration pulse wave output means corresponding to a plurality of cycles before the present time, and the actual range of the acceleration pulse wave output by the acceleration pulse wave output means is calculated. Since the determination is made by comparing the waveform, the signal affected by the body movement of the human body can be reliably detected, and a non-invasive sphygmomanometer having few errors due to the body movement of the human body can be realized.

Further, in the non-invasive sphygmomanometer according to the twelfth aspect of the present invention, when the blood pressure value calculating means does not use the output waveform for a certain time for calculating the blood pressure value, the blood pressure value selecting means is informed of the fact. A signal indicating the blood pressure value is output to the notifying means, and the calculation result of the blood pressure value calculated one time before that time is output to the notifying means. When receiving a signal indicating that the signal is not used for calculation, the output value of the blood pressure value calculating means is notified to the subject or a third party together with the fact.

The notifying means notifies the time when the waveform selecting means did not use the output waveform for the calculation of the blood pressure value together with the blood pressure value. A non-invasive sphygmomanometer capable of immediately recognizing whether or not the result is normally calculated can be realized.

In the non-invasive sphygmomanometer according to the thirteenth aspect of the present invention, the notifying means outputs a plurality of signals indicating that the waveform selecting means determines that the output waveform for a certain time is not used for calculating the blood pressure value. In this case, the subject or the third party is notified that the waveform selecting means has determined that the output waveform for a certain time is not used for calculating the blood pressure value.

Then, when the body movement of the human body occurs continuously, the fact is notified to the subject or a third party, so that the subject or the third party can perform accurate blood pressure measurement. A non-invasive sphygmomanometer that calls attention can be realized.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram of a non-invasive blood pressure monitor according to Embodiment 1 of the present invention.

In the figure, 11 is a pulse wave detecting means, 12 is a waveform dividing means, 13 is an acceleration pulse wave output means, 14 is a blood pressure value calculating means, and 15 is a display. Here, the pulse wave detecting means 11
Is a photovoltaic plethysmograph which detects an increase or decrease in blood volume due to the pulsation of the heart based on a change in the amount of transmitted light.
It comprises a light receiving element 11b and a conversion circuit 11c. The light emitting element 11a is an LED that emits light including a wavelength of 5000 to 8000 °, which is absorbed by hemoglobin in blood with high selectivity, and the light receiving element 11b is 5000
CdS that changes electrical characteristics in response to light having a wavelength in the range of 8000 ° is used. In this embodiment, the plethysmogram of the phototube of the finger 16 of the hand is detected and output, and the light emitting element 11a and the light receiving element 11b are fixed to a fixed position of the subject's finger by a fixture (not shown). At the same time, light from the outside is blocked. Also,
The blood pressure value calculating means 14 comprises a resting state detecting means 14e, a wave height calculating means 14b, a peak time point calculating means 14c, and a blood pressure value calculating means 14d. In addition, the display 15 informs the subject who measures the blood pressure value, or the measured blood pressure value to a third party such as a doctor or a nurse who intends to use the blood pressure value for treatment of the subject by displaying the measured value. Is integrated with the conversion circuit 11c of the pulse wave detection means 11, the waveform division means 12, the acceleration pulse wave output means 13, and the blood pressure value calculation means 14.

The non-invasive sphygmomanometer of this embodiment operates as follows by the above configuration. That is, when the subject fixes the pulse wave detecting means 11 to the finger 16 of the hand with the fixture, light including light having a wavelength of 5000 to 8000 ° is emitted from the light emitting element 11a. Because hemoglobin absorbs with strong selectivity, the amount of light transmitted through the finger accurately reflects the increase or decrease in blood volume.
The light receiving element 11b selectively receives the transmitted light in the wavelength band that is selectively absorbed by hemoglobin, and converts the transmitted light into an electric signal corresponding to the amount of light received through the conversion circuit 11c. The output signal 11c can be extracted by converting an increase or decrease in blood volume due to the heartbeat in a portion where the light emitting element 11a and the light receiving element 11b are attached into an electric signal. At this time, the effect on the human body is that the fixture having the light emitting element 11a and the light receiving element 11b is merely fixed to the finger of the subject, and no force other than the pressure due to the attachment of the fixture is applied to the subject. The signal indicating the increase or decrease of the blood volume is output from the pulse wave detecting means 11 to the waveform dividing means 12 and is divided into a waveform having a time corresponding to one cycle of the heart beat.
The acceleration pulse wave output means 13 outputs this signal to 2
The pulse wave is differentiated twice by passing through a differentiating circuit to calculate the acceleration of the pulse wave (acceleration pulse wave) and outputs it to the blood pressure value calculation means 14. Here, the acceleration pulse wave represents a force applied to the pulse wave, and a positive value indicates a force in a direction that promotes blood circulation including a heartbeat, and a negative value indicates a blood force due to resistance of a blood vessel or the like. The magnitude of the force in the direction that inhibits the circulation of FIG. 2 shows an example of the waveform of the acceleration pulse wave together with an electrocardiogram and a pulse wave. In the figure, an ECG is an electrocardiogram, and when a signal having a large and steep positive peak called an R wave shown by R in the figure appears, the ventricle of the heart begins to contract, and the blood stored in the left and right ventricles and the lungs. It is pushed out to the whole body. In the figure, PTG is a pulse wave, which starts to rise sharply some time after the appearance of the R wave in the electrocardiogram, and then monotonously decreases while showing a slight change. In the figure, APG is an acceleration pulse wave, which captures a slight change in the pulse wave and converts it into a signal having a clear amplitude. Such a change in the acceleration pulse wave is considered to represent the force applied to the blood in the blood vessel, and the ability of the heart, which varies greatly between individuals, the flexibility of the blood vessel, the transport resistance in the blood vessel, etc. It is strongly reflected and is used for diagnosis of abnormalities in the blood circulation system. For example, five peaks seen in the acceleration pulse waveform are represented by a, b, c, d, and e as shown in the figure.
A wave reflects the driving pressure wave generated by the ejection of blood from the heart, b wave reflects the cardiac blood output, and c wave
It is said that the wave reflects the flexibility of the blood vessel, and the d-wave reflects the intensity of the burden on the heart when pumping blood. An index has been devised for assessing the circulatory system. Also,
The acceleration pulse wave is strongly influenced by factors that determine the blood pressure of the human body. In particular, the wave height of the d-wave, which is the fourth peak of this waveform, has been correlated with the blood pressure value. There is a strong relationship between the wave and the blood pressure. By analyzing this waveform, it is possible to estimate the systolic blood pressure, the diastolic blood pressure, and the average blood pressure without applying pressure to the human body by the cuff.

However, in the case of such a non-invasive sphygmomanometer, since the blood pressure value of the subject is estimated by finely analyzing the pulse wave, if the pulse wave is not accurately detected, it appears as an error. Although there is a risk, the pulse wave obtained by the phototube plethysmograph reacts sensitively to slight body movements of the subject, so the waveform changes from the pulse wave detected at rest, and the error increases. There was a case. In order to reduce such an error, measures such as estimating a blood pressure value using a waveform obtained by averaging the outputs of the acceleration pulse wave output means 13 in a plurality of cycles are taken. In the case where a waveform accompanied by is mixed, a large error may occur.

Therefore, in the non-invasive blood pressure monitor of this embodiment,
The blood pressure value calculation means 14 is provided with a rest state detection means 14e,
When the output of the waveform dividing means 12 or the acceleration pulse wave dividing means 13 satisfies certain conditions for a certain period of time, the subject who measures the blood pressure is determined to be at rest, and after the determination, the blood pressure value is transmitted to the subject or a third party. I will inform you.

In this embodiment, the following three conditions are set as the pulse wave or the acceleration pulse wave to have at rest, and if any one of the three conditions is not satisfied, it is determined that the necessary condition is not satisfied. Do not report blood pressure values.

First, the first condition is to use a calculation formula obtained in advance to determine a possible range of the maximum value and the minimum value in one cycle of the heart beat of the acceleration pulse wave calculated from the amplitude of the pulse wave. When the maximum value, the minimum value, or the swing width of the waveform divided into one cycle of the actual acceleration pulse wave is within these ranges, it is determined that the condition is satisfied.

This is because the pulse wave at rest is composed of relatively small frequency components of 1 Hz to 5 Hz. However, when a relatively fast-moving body motion such as sneezing occurs during the collection of the pulse wave, the pulse wave causes the frequency to be reduced. And the acceleration pulse wave is calculated by differentiating the pulse wave twice, so that the larger the pulse wave change speed is, the larger the signal is output compared to the change amount of the pulse wave. The fact that a larger fluctuation appears in comparison with the amplitude of the pulse wave than at rest is used. Formula (1) shows a formula for calculating the range in which the maximum value exists.

Almax × mp-p <hmax <ahmax × mp-p (1) where mp-p is the amplitude of the pulse wave output by the waveform dividing means, and hmax is the acceleration pulse output by the acceleration pulse wave output means. The maximum values of the waves, almax and ahmax, are constants for determining the range, and are obtained by statistically processing waveforms collected from a large number of subjects.

Here, the waveform of the pulse wave used to determine the maximum value, the minimum value of the acceleration pulse wave or the normal range of the swing width is either the output waveform of the pulse wave detecting means or the output waveform of the waveform dividing means. However, using the output waveform of the waveform dividing means can be easily realized.

The second condition is that a normally obtainable range from the time when the minimum value of the pulse wave divided into one cycle of the heartbeat is obtained to the time when the maximum value or the minimum value of the acceleration pulse wave is obtained is calculated in advance. When the maximum value or the minimum value of the actual acceleration pulse wave is within these ranges, it is determined that the condition is satisfied.

This is because, for the same person, the pattern of the acceleration pulse wave in one cycle of the heartbeat at rest is substantially constant, and the maximum value is obtained after a certain period of time from the time point of the minimum value of the pulse wave, and further after that time. It often takes the minimum value, and utilizes the fact that when this pattern is broken, it is considered that the pulse wave could not be collected accurately or that the pulse wave was affected by body movement. Formula (2) shows a formula for calculating the range in which the maximum value exists.

Tfmax + Tmb <Thmax <Tlmax + Tmb (2) where Tmb is the point in time when the minimum value of the pulse wave output by the waveform dividing means is generated, and Thmax is the point in time when the maximum value of the acceleration pulse wave output by the acceleration pulse wave output means is generated. , Tfmax, and Tlmax are constants that determine the range, and are obtained by statistically processing waveforms collected from many subjects.

In this case, the range of the time points where the maximum value and the minimum value of the acceleration pulse wave can normally be calculated from the time point when the minimum value of the pulse wave is obtained. Any point-in-time information can be obtained from any information. However, the most accurate and simplest is the minimum value of the pulse wave.

The third condition is that, based on the waveform of the acceleration pulse wave for one cycle of a plurality of heartbeats before the current time, the current heartbeat is calculated as 1
The range that can be usually taken at a certain point in time of the waveform of the acceleration pulse wave is calculated using a calculation formula obtained in advance, and the maximum or minimum value of the waveform of the actual acceleration pulse wave falls within these ranges. At some point, it is determined that the condition is satisfied.

This utilizes the fact that if the subject holds a resting state, the waveform of one cycle of the heartbeat of the acceleration pulse wave has substantially the same shape. A formula for calculating a range that the acceleration pulse wave can take at a certain time point tn in the formula (3) is shown.

(Hmaxn−hminn) × bmin <hn <(hmaxn−hminn) × bmax (3) where hmaxn is the maximum value of the acceleration pulse wave waveform used to calculate the normal range at time tn, hminn
Is the minimum value, hn is the wave height at the time tn of the acceleration pulse wave divided into a waveform corresponding to one cycle of the heartbeat output by the acceleration pulse wave output means, bmin, bmin are constants for determining the range, and Are statistically processed from waveforms collected from subjects. The number n of times used for the determination of the resting state may be one, but it is desirable that there be a plurality of points in order to accurately detect the resting state.

When all of the above conditions are satisfied, it is determined that the subject is in a resting state, and the waveform of the acceleration pulse wave output means 13 is output as it is to the wave height calculating means 14b and the peak time calculating means 14c. The wave height data and the peak time data are calculated by receiving the predetermined processing, and all or at least one of the systolic blood pressure value, the diastolic blood pressure value, and the average blood pressure value is calculated from these values, and the display unit 15
The result is displayed on the display 15 to the subject or a third party.

On the other hand, if any one of the above conditions is not satisfied, it is determined that the subject is not in a resting state,
The waveform of the acceleration pulse wave output means 13 is a wave height calculation means 14b,
It is not output to the peak time point calculation means 14c. In the non-invasive sphygmomanometer according to the present embodiment, the operation is continued until the resting state detecting unit 14e detects the resting state. However, if the blood pressure value calculating unit 14 is provided with a counter, A configuration may be adopted in which a signal indicating the failure is output to the display and the measurement is terminated.

In this embodiment, the waveform of the acceleration pulse wave is synchronized with the pulse of the acceleration pulse wave by the waveform dividing means 12 in this embodiment, that is, the waveform of the acceleration pulse wave is represented by R in the ECG shown in FIG.
The waveform divided into the waveform between R and R is
, The wave height calculating means 3b calculates the wave heights ha, hb, hc, hd, of the peaks a, b, c, d, e from the baseline O.
He is calculated, and the peak time point calculating means 3c calculates the peak time points Ta, Tb, T at which the plurality of peaks have the maximum value or the minimum value.
c, Td, and Te are calculated, and the blood pressure value calculating means 3d calculates the information on the peak height and the peak time of the plurality of peaks using equations (4), (5), and (6), which are equations obtained in advance. , The systolic blood pressure value Ph, the diastolic blood pressure value Pl, and the average blood pressure value Pa
Is calculated.

Ph = Ah0 + Ah1 × ha + Ah2 × hb + Ah3 × hc + Ah4 × hd + Ah5 × he + Ah6 × (Tb-Ta) + Ah7 × (Tc-Ta) + Ah8 × (Td-Ta) + Ah9 × (Te-Ta) (4) Al + × ha + Al2 × hb + Al3 × hc + Al4 × hd + Al5 × he + Al6 × (Tb−Ta) + Al7 × (Tc−Ta) + Al8 × (Td−Ta) + Al9 × (Te−Ta) (5) Pa = Aa0 + Aa1 × ha + Aa3 × hb + Aa3 × hb + Aa3 × hc × hd + Aa5 × he + Aa6 × (Tb−Ta) + Aa7 × (Tc−Ta) + Aa8 × (Td−T) + Aa9 × (Te−Ta) (6) where Ah0, Ah1... Aa9 are calculated in advance. This is the coefficient of the equation. In the present embodiment, these coefficients are used for the systolic blood pressure value Ph and the diastolic blood pressure value Pl of a plurality of subjects.
The blood pressure is measured by the Korotkoff method, which can be measured non-invasively, and the average blood pressure value Pa is calculated from these values using the simple conversion formula of equation (7), and these blood pressure values and the pulse wave of the subject before and after the blood pressure values are collected. Statistically using the least squares method from the data obtained by processing.

Pa = (Ph−Pl) / 3 + Pl (7) In the present embodiment, the Korotkoff method was used as a method for measuring the blood pressure for obtaining the calculation formula as described above. Any method can be used as long as it can measure the blood pressure value with high accuracy, such as a direct method of directly measuring the pressure value invasively by inserting a blood pressure.

In addition, since the non-invasive sphygmomanometer according to the present embodiment does not have a means for collecting an electrocardiogram, the division of the waveform by the waveform dividing means 12 is performed based on the minimum value of the pulse wave detected by the pulse wave detecting means 11. A certain point in time is obtained, and a pulse wave waveform for each beat is divided based on a point in time which is traced back by a certain time Tr from that point. The systolic blood pressure value P of the subject thus calculated
h, the diastolic blood pressure value Pl, and the average blood pressure value Pa are displayed as numerical values on the display unit 15 and notified to the subject or a third party.

As described above, in the non-invasive sphygmomanometer according to the present invention, the resting state detecting means 14e detects a case where no human body motion which greatly affects the estimation of the blood pressure value has occurred.
Only in that case, the display 15 notifies the subject or a third party of the blood pressure value, so that an accurate blood pressure value can be calculated from the waveform at rest.

In the above embodiment, after the resting state detecting means 14e detects the resting state of the subject, the output waveform of the acceleration pulse wave output means 13 is output to the wave height calculating means 14b and the peak time point calculating means 14c. Before the resting state detecting means 14e detects the resting state, the output waveform of the acceleration pulse wave output means 13 is output to the wave height calculating means 14b and the peak time point calculating means 14c to repeatedly calculate the blood pressure value. When the state detecting means 14e detects the resting state, the latest blood pressure value calculated at that time may be reported to the subject or a third party by the reporting means.

In the above embodiment, the display 15 is provided with the conversion circuit 11c of the pulse wave detecting means 11, the waveform dividing means 12,
Although it is integrated with the acceleration pulse wave output means 13 and the blood pressure value calculation means 14, it is possible to install only the display 15 at a distance to collectively monitor the condition of a plurality of patients in a hospital room at a nurse center or the like at a hospital or the like. May be.

In the above embodiment, the pulse wave detecting means 11
Is attached to the tip of the finger to estimate the blood pressure value.However, if the pulse wave can be detected not only at the tip of the finger but also at the wrist, upper arm, ankle, earlobe, etc., the pulse wave is correlated with the blood pressure value. It is possible to take However, the tip of the finger is not applied to the non-invasive sphygmomanometer of the present embodiment because of the fact that it is hardly affected by body movement, the ease of detecting a pulse wave, and the connection status of blood vessels from the heart. Most desirable.

In the above embodiment, the pulse wave detecting means 11
Although a transmitted light type phototube plethysmograph is used as the above, a reflected light type phototube plethysmograph which detects a pulse waveform based on a change in the amount of reflected light may be used.

In the above embodiment, the light emitting element 11a absorbs hemoglobin in blood with high selectivity.
LED that emits light including wavelength light of 000 to 8000Å
The light receiving element 11b uses CdS, which changes electrical characteristics in response to light having a wavelength in the range of 5000 to 8000 °, but selectively absorbs components such as hemoglobin in blood and transmits or reflects light. Light of any wavelength may be used as long as the amount of blood relatively indicates the blood volume at the site, and any light-emitting element or light-receiving element may be used as long as it satisfies the above-mentioned purpose. The purpose of the present invention is not to limit the types of light receiving elements.

The conditions used by the resting state detecting means 14e to determine the resting state include the maximum value, the minimum value or the amplitude and the maximum value or the maximum value of the waveform of the acceleration pulse wave divided into one cycle of the heartbeat. Although the time point of the minimum value is used, it is possible to detect the resting state without necessarily using all of the time points. Further, a plurality of maximum values and minimum values of the acceleration pulse wave may be used, but in this case, it is more effective to use the time point than the value because the variation in the value is small.

The resting state detecting means 14e detects the resting state using the outputs of the pulse wave dividing means 12 and the acceleration pulse wave outputting means 13, but uses the vibration detecting means to detect the movement of the subject's body. A configuration in which the resting state of the subject is detected by the detection may be used. In the non-invasive sphygmomanometer according to the present embodiment, the output of the pulse wave detecting unit 11 is divided into one cycle of the heartbeat by the waveform dividing unit 12 and then output to the acceleration pulse wave output unit 13. First, the acceleration pulse wave output means 13
After calculating the acceleration pulse wave by the
May be divided into waveforms for each cycle.

In the non-invasive sphygmomanometer of this embodiment, the waveform dividing means 12 divides the output of the pulse wave detecting means 11 into one cycle of the heartbeat. The signal may be divided into a plurality of periods, or may be divided into a waveform having a time equal to or less than one period if synchronized with the period of the heartbeat. Furthermore, if each of the divided waveforms includes information necessary for estimating a blood pressure value including at least five peaks from a to e, the estimated blood pressure value is obtained even if the time lengths are different from each other. There is no effect on the accuracy of this.

(Embodiment 2) FIG. 3 is a block diagram of a non-invasive blood pressure monitor according to Embodiment 2 of the present invention. The present embodiment is different from the first embodiment in that the blood pressure value calculating means 14 has a waveform selecting means 14f instead of the resting state detecting means, and selects a waveform which is not affected by the body movement of the human body to obtain a blood pressure. The point used for the calculation of the value, and even after outputting the calculation result to the display 15, the blood pressure value is repeatedly calculated using the waveform of the newly collected pulse wave and output to the display 15, If the display 15 is a continuous sphygmomanometer that continuously reports the result to the subject or a third party, and the waveform selecting unit 14f determines that the condition of the waveform is not satisfied, the current waveform does not satisfy the condition. Is output to the display 15 and the display 1
5 is that the LED 15b notifies the subject or a third party that the current waveform does not satisfy the condition, and furthermore, when the LED is continuously turned on, the speaker 15c notifies the speaker 15c of that.

In the case of a sphygmomanometer in which the blood pressure is measured only once after the power is turned on or the start button is depressed under a predetermined condition, the blood pressure is temporarily disturbed due to body movement and the blood pressure cannot be measured. Even if there is, the time required for the measurement is extended if rest is maintained thereafter, but the blood pressure measurement itself can be realized. However, in the case of a continuous sphygmomanometer that continuously repeats blood pressure measurement, data is lost while the blood pressure value cannot be calculated due to temporary disturbance of the pulse wave, and an averaging process is performed to remove noise. For example, when calculating a value from a waveform that is longer than the minimum time required for calculating a blood pressure value, the longer the time used for processing, the longer the effect of temporary waveform disturbance remains, and an accurate blood pressure There is a disadvantage that the time during which the calculation can be performed is shortened.

Therefore, in the non-invasive blood pressure monitor of this embodiment,
The blood pressure value calculating means 14 has a waveform selecting means 14f, selects a waveform which is not affected by the body movement of the human body and uses it for calculating the blood pressure value, thereby minimizing the influence of the temporary disturbance.

In the present embodiment, three conditions are set as conditions which the pulse wave or the acceleration pulse wave should have at rest, as in the resting state detecting means of the first embodiment, and any one of the three conditions is not satisfied. In this case, it is determined that the necessary condition is not satisfied, and is not selected as the waveform used for estimating the blood pressure value.

Note that these three conditions are the same as those used by the resting state detecting means of the first embodiment, and therefore, description thereof is omitted here.

However, with respect to the third condition, unlike the resting state detecting means, all of the previous acceleration pulse waves for calculating the range which can be normally taken at a certain point in time are all the first and second acceleration pulse waves. Only applies if the conditions of

When all of the above conditions are satisfied, it is determined that the subject is at rest and the pulse wave does not include disturbance due to body movement, and the waveform of the acceleration pulse wave output means 13 is directly calculated as the wave height. Means 14b, peak time calculation means 1
4c, and undergoes a predetermined process to calculate the peak height data and the peak time data. From this value, the blood pressure value calculating means 14d calculates all or at least one of the systolic blood pressure value, the diastolic blood pressure value, and the average blood pressure value. One is calculated and output to the display 15, and the result is reported to the subject or a third party by the blood pressure display unit 15 a of the display 15.

On the other hand, if any one of the above conditions is not satisfied, it is determined that the subject is not in a resting state and the pulse wave contains disturbance due to body movement of the human body. Are not output to the wave height calculation means 14b and the peak time point calculation means 14c. At this time, the blood pressure value displayed by the blood pressure value display unit 15a continuously displays the blood pressure value calculated one time before, but at the same time, the LED 15b is turned on and the new calculation is not performed. And make it known to the subject or third parties. The display by this LED 15b is
Although it is strictly shown that the blood pressure value indicated by a is not the current value, the effect of prompting the subject to rest can be expected when the blood pressure value is displayed to the subject.

Further, in the non-invasive blood pressure monitor of this embodiment,
If the subject's body movements occur continuously and the waveform selecting means 14f continues to be not selected as the waveform used for estimating the blood pressure value for a certain period of time or more, the LED 15b of the display 15 blinks, and the subject or a third party Make it recognizable. This is because when the body motion is occurring continuously, the subject is often distracted from things other than blood pressure measurement, and it is not enough to prompt the subject to rest just by displaying In order to strongly encourage the user to keep a rest, the sound is notified from the speaker 15c together with the display.

As described above, using the selected waveform,
The blood pressure value of the subject is calculated similarly to the non-invasive blood pressure monitor of the first embodiment.

As described above, in the non-invasive sphygmomanometer of this embodiment, the blood pressure value calculating means 14 has the waveform selecting means 14f,
Since a waveform that is not affected by the body movement of the human body is selected and used for calculating the blood pressure value, the blood pressure value can be calculated without using a waveform disturbed by the body movement of the subject. Can be calculated.

The LED 15 provided on the display 15
b is turned on to notify when the waveform selecting means 14f does not use the output waveform for the calculation of the blood pressure value, so that the subject or a third party who saw the display calculated the blood pressure value normally. Can be immediately recognized.

Further, when the body movement of the human body is continuously occurring, the LED 15b blinks and the subject is notified by voice through the speaker 15c to the subject or a third party. It is possible to call attention so that the three persons can perform accurate blood pressure measurement.

In the present embodiment, the blood pressure value display section 15a displays the current blood pressure value. However, the display section 15 is provided with a storage means for storing the blood pressure values for one day. The blood pressure values for one day may be displayed at once by a line graph taking time on the horizontal axis. In this case, it is more preferable that the portion at the time when the waveform selecting means 14f does not use the waveform for calculating the blood pressure value is displayed by a broken line, or another line indicating the time is displayed.

In the non-invasive sphygmomanometer according to the first and second embodiments, the display unit 15 notifies the measurement result to the subject or a third party who intends to use the measurement result for treatment of the subject. However, instead of the display 15, for example, a long-time continuous measurement result is stored as data in a storage device such as a floppy disk so that the subject or a third party can check the content stored in the storage device whenever necessary. How to use.

[0081]

As described above, the non-invasive sphygmomanometer according to the first aspect of the present invention indirectly estimates the blood pressure of the human body using the acceleration pulse wave reflecting the state of the blood circulation system of the human body. Therefore, it is not necessary to apply a pressure equal to or higher than the systolic blood pressure value to the measurement unit using the cuff, and the subject does not feel pressure or discomfort due to tightening. Furthermore, since the resting state detecting means notifies the calculated blood pressure value when the subject who is to measure the blood pressure value confirms that the subject is in a resting state, there is no human body movement that greatly affects the estimation of the blood pressure value. A non-invasive sphygmomanometer that can calculate a blood pressure value from a waveform in a resting state and that can accurately calculate a blood pressure value can be provided.

Further, in the non-invasive sphygmomanometer according to the second aspect, when the resting state detecting means is such that the output of the waveform dividing means or the acceleration pulse wave output means satisfies a predetermined condition, the subject is at rest. Since the determination is made, the resting state of the subject can be reliably detected without separately providing a detecting means for detecting the resting state.

Further, since the non-invasive blood pressure monitor according to the third aspect indirectly estimates the blood pressure of the human body using the acceleration pulse wave reflecting the state of the blood circulation system of the human body, the measuring unit uses a cuff. It is not necessary to apply pressure equal to or higher than the systolic blood pressure value to the subject, and the subject does not feel pressure or discomfort due to tightening. Furthermore, since the waveform selecting means can discriminate the pulse wave affected by the body movement of the human body which has a great influence on the estimation of the blood pressure value, and can not use the pulse wave for the estimation of the blood pressure value, it is possible to collect the pulse wave. A non-invasive sphygmomanometer capable of minimizing the influence on the calculation of the blood pressure value even if the subject's body movement temporarily occurs.

The non-invasive sphygmomanometer according to the fourth aspect of the present invention provides a sphygmomanometer which continuously informs the subject's blood pressure value even if the pulse with human body movement greatly affects the estimation of the blood pressure value. Since the wave can be identified and not used for estimating the blood pressure value, even if the subject's body movement temporarily occurs while continuously measuring the blood pressure value, the influence of the body movement is minimized. Thus, it is possible to provide a non-invasive blood pressure monitor that can realize more accurate continuous measurement.

The non-invasive sphygmomanometer according to claim 5, wherein the notifying means has a storage means, wherein the storing means stores a calculation result outputted by the blood pressure value calculating means, and wherein the notifying means stores the calculation result. Since all or a part of the contents stored in the storage device are notified to the subject or a third party together with temporal information, a non-invasive blood pressure monitor capable of recognizing a temporal transition at a glance can be provided.

The non-invasive sphygmomanometer according to the sixth aspect of the present invention provides a non-invasive sphygmomanometer in which even if a pulse wave signal detected by the pulse wave detecting means is changed by a human body motion and a component having a relatively high frequency is superimposed. The maximum value of the acceleration pulse wave, the minimum value or the range of the normally possible magnitude of the swing width is calculated from the pulse wave waveform,
Since the determination is made by comparing this with the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means, the body motion of the relatively high frequency component of the human body can be easily and reliably detected, and whether or not the human body is in a resting state Can be reliably determined.

The non-invasive sphygmomanometer according to the seventh aspect of the present invention provides a non-invasive sphygmomanometer in which even if a component having a relatively high frequency is superimposed on the pulse wave signal detected by the pulse wave detecting means due to a change due to body movement of the human body. The maximum value of the acceleration pulse wave, the minimum value or the range of the normally possible magnitude of the swing width is calculated from the pulse wave waveform,
Since the determination is made by comparing this with the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means, it is possible to easily and reliably detect the signal affected by the relatively high frequency component of the body movement of the human body, A non-invasive sphygmomanometer with less error due to body movement can be realized.

The non-invasive sphygmomanometer according to claim 8 is characterized in that the pulse wave signal detected by the pulse wave detecting means is changed by the body movement of the human body and the waveform pattern of the acceleration pulse wave is changed. However, the range of possible times at which the maximum value or the minimum value of the acceleration pulse wave appears is calculated from the waveform of the pulse wave and obtained from this and the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means. Since the determination is made by comparing the maximum value and the minimum value present time, the body movement of the human body can be easily and reliably detected, and it can be reliably determined whether the human body is in a resting state.

The non-invasive sphygmomanometer according to the ninth aspect is characterized in that the pulse wave signal detected by the pulse wave detecting means is changed by a human body movement and the waveform pattern of the acceleration pulse wave is changed. However, the range of possible times at which the maximum value or the minimum value of the acceleration pulse wave appears is calculated from the waveform of the pulse wave and obtained from this and the actual waveform of the acceleration pulse wave output by the acceleration pulse wave output means. Since the maximum value and the minimum value are compared and determined, the signal affected by the human body motion can be easily and reliably detected, and the non-invasive blood pressure with little error due to the human body motion can be detected. Can be realized.

In the non-invasive sphygmomanometer according to the tenth aspect, the pulse wave signal detected by the pulse wave detecting means is changed by a human body motion, and various noises are superimposed on the waveform of the acceleration pulse wave. Even when the acceleration pulse wave is obtained, the normal range at one or more time points of the acceleration pulse wave waveform is calculated from a plurality of output waveforms of the acceleration pulse wave output means corresponding to a plurality of cycles before the present time, and this is calculated. Since the determination is made by comparing with the actual waveform of the acceleration pulse wave output from the pulse wave output means, the body movement of the human body can be easily and reliably detected, and it can be reliably determined whether the human body is in a resting state.

Further, in the non-invasive blood pressure monitor according to the eleventh aspect, the pulse wave signal detected by the pulse wave detecting means is changed by a human body motion and various noises are superimposed on the waveform of the acceleration pulse wave. Even when the acceleration pulse wave is obtained, the normal range at one or more time points of the acceleration pulse wave waveform is calculated from a plurality of output waveforms of the acceleration pulse wave output means corresponding to a plurality of cycles before the present time, and this is calculated. Since the pulse waveform is output by the pulse wave output means and compared with the actual waveform of the acceleration pulse wave, the signal affected by the body movement of the human body can be reliably detected,
A non-invasive sphygmomanometer with few errors due to human body movement can be realized.

The non-invasive sphygmomanometer according to the twelfth aspect reports the time when the waveform selecting means did not use the output waveform for the calculation of the blood pressure value together with the data. It is possible to realize a non-invasive sphygmomanometer that can immediately recognize whether or not the calculated blood pressure value is a normally calculated result.

The non-invasive sphygmomanometer according to the thirteenth aspect notifies the subject or a third party of the fact that the body movement of the human body occurs continuously, so that the subject or the third party can do so. A non-invasive sphygmomanometer that calls attention so that accurate blood pressure measurement can be performed can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram of a non-invasive sphygmomanometer according to a first embodiment of the present invention.

FIG. 2 shows an electrocardiogram, a pulse wave,
Waveform diagram of acceleration pulse wave

FIG. 3 is a block diagram of a non-invasive blood pressure monitor according to a second embodiment of the present invention.

FIG. 4 is an external view of a conventional non-invasive blood pressure monitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Display 3 Switch 4 Connector 5 Arm band tube 6 Cuff 7 Microphone 11 Pulse wave detection means 11a Light emitting element 11b Light receiving element 11c Conversion circuit 12 Waveform division means 13 Acceleration pulse wave output means 14 Blood pressure value calculation means 14a Waveform division means 14b Wave height calculation means 14c Peak time point calculation means 14d Blood pressure value calculation means 14e Resting state detection means 14f Waveform selection means 15 Display 15a Blood pressure value display section 15b LED 15c Speaker 16 fingers

Claims (13)

[Claims] 1. A pulse wave detecting means for detecting a pulse wave generated by the circulation of blood in a human body and outputting a signal corresponding to the magnitude of the pulse wave, and an output signal of the pulse wave detecting means is used for detecting a pulse of the heart. A waveform dividing means for dividing the waveform into time waveforms corresponding to a period, an acceleration pulse wave output means for calculating and outputting an acceleration pulse wave obtained by differentiating the output waveform of the waveform dividing means twice; Systolic blood pressure value of the human body based on information obtained from the output and the acceleration pulse wave output by the acceleration pulse wave output means,
An average blood pressure value, a blood pressure value calculating means for calculating and outputting at least one of the diastolic blood pressure values, and a notifying means for notifying a subject or a third party of an output of the blood pressure value calculating means, wherein the blood pressure value calculating means Has a resting state detecting means for detecting that the subject whose blood pressure value is detected is in a resting state, and the notifying means determines the subject's blood pressure value after the resting state detecting means determines that the subject is in a resting state. A non-invasive sphygmomanometer that informs a third party. 2. The non-invasive blood pressure according to claim 1, wherein the resting state detecting means determines that the subject is at rest when the output of the waveform dividing means or the acceleration pulse wave output means satisfies a predetermined condition. Total. 3. A pulse wave detecting means for detecting a pulse wave generated by the circulation of blood of a human body and outputting a signal corresponding to the magnitude of the pulse wave, and an output signal of the pulse wave detecting means is used to detect a pulse of the heart. A waveform dividing means for dividing the waveform into time waveforms corresponding to a period, an acceleration pulse wave output means for calculating and outputting an acceleration pulse wave obtained by differentiating the output waveform of the waveform dividing means twice; Systolic blood pressure value of the human body based on information obtained from the output and the acceleration pulse wave output by the acceleration pulse wave output means,
An average blood pressure value, a blood pressure value calculating means for calculating and outputting at least one of the diastolic blood pressure values, and a notifying means for notifying a subject or a third party of an output of the blood pressure value calculating means, wherein the blood pressure value calculating means The waveform selecting means has a waveform selecting means for selecting a waveform used to measure a blood pressure value from the obtained waveform, and the waveform selecting means has a predetermined output waveform of the waveform dividing means or the acceleration pulse wave output means. A non-invasive sphygmomanometer that does not use the output waveform at that time for estimating the blood pressure value when the condition is not satisfied. 4. The blood pressure value calculating means calculates a blood pressure value from information of the waveform dividing means and the acceleration pulse wave output means at a certain time, outputs a calculation result to the notifying means, and then outputs the calculated result to the notifying means. 4. The method according to claim 3, wherein the calculation of the blood pressure value is repeated using the output of the acceleration pulse wave output means, and the calculation result is output to the notification means every time a new calculation result is obtained.
2. The non-invasive blood pressure monitor according to 1. 5. The notifying means has a storage means, wherein the storing means stores a calculation result output from the blood pressure value calculating means, and the notifying means stores all or a part of the contents stored in the storing means in time. The non-invasive sphygmomanometer according to claim 4, wherein the non-invasive blood pressure monitor is notified to a subject or a third party together with important information. 6. The resting state detecting means, wherein the maximum value, the minimum value or the amplitude of the output signal of the acceleration pulse wave outputting means is not within a range obtained by calculating from the output waveform of the pulse wave detecting means or the waveform dividing means. 3. The non-invasive sphygmomanometer according to claim 2, wherein it is determined that the predetermined condition is not satisfied sometimes. 7. The waveform selecting means when the maximum value, the minimum value or the amplitude of the output signal of the acceleration pulse wave output means is not within a range obtained by calculating from the output waveform of the pulse wave detecting means or the waveform dividing means. The non-invasive sphygmomanometer according to claim 3, wherein it is determined that the predetermined condition is not satisfied. 8. The resting state detecting means is preset when the maximum or minimum value of the output signal of the acceleration pulse wave output means is not within a time range calculated from the output waveform of the waveform dividing means. 3. The non-invasive sphygmomanometer according to claim 2, wherein it is determined that the condition is not satisfied. 9. The waveform selecting means is preset when the maximum value or the minimum value of the output signal of the acceleration pulse wave output means is not within a time range calculated from the output waveform of the waveform dividing means. The non-invasive sphygmomanometer according to claim 3, wherein it is determined that the condition is not satisfied. 10. The resting state detecting means includes a range in which the output waveform of the acceleration pulse wave output means at the present time is calculated from the output waveform of the acceleration pulse wave output means for a time corresponding to a plurality of cycles before the present time. The non-invasive sphygmomanometer according to claim 2, wherein it is determined that the predetermined condition is not satisfied when the value deviates from the range. 11. The waveform selecting means according to claim 1, wherein said output waveform of said acceleration pulse wave output means is obtained from a range obtained by calculating from the output waveform of said acceleration pulse wave output means for a time corresponding to a plurality of cycles before the present time. The non-invasive sphygmomanometer according to any one of claims 3 to 5, wherein when it deviates, it is determined that a predetermined condition is not satisfied. 12. The blood pressure value calculating means, when the waveform selecting means does not use the output waveform for a certain time for calculating the blood pressure value, outputs a signal indicating the fact to the notifying means and one time before the time. The calculation result of the calculated blood pressure value is output to the notifying means. If the notifying means receives a signal indicating that the waveform selecting means does not use the output waveform for a certain time for calculating the blood pressure value, the blood pressure value is notified together with the fact. The output value of the value calculating means is reported to a subject or a third party,
12. The non-invasive blood pressure monitor according to any one of items 9 and 11. 13. A subject or a third party when a signal indicating that the waveform selecting means has determined that an output waveform at a certain time is not used for calculating a blood pressure value is continuously received over a plurality of cycles. 13. The non-invasive sphygmomanometer according to claim 12, which notifies that effect.