JPH11332837A - Biomonitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve failures in judging the movement of blood circulation of a living being such as contraction capacity of the heart unavoidably affected by the degree of arterial scleosis and in judging pathologic arterial scleosis distinguished from increase in the resistance of a blood vessel attributed to a drop in the room temperature or mental tension during the measurement in a biomonitor. SOLUTION: There are arranged a pulse wave detection means 1 for detecting a pulse wave of a living being, a heart contraction time computing means 4 to compute contraction time of the heart based on an output signal of the pulse wave detection means, a circulation kinetics judging means 6 to judge the blood circulation movement of the living being and a display means 12 to display an output signal of the circulation movement judging means. The heart contraction time is computed from the pulse wave of the living being to judge the blood circulation kinetics of the living being such as the contraction capacity of the heart based on the contraction time computed. This capability of judging the blood circulation kinetics of the living being such as the contraction capacity of the heart allows the judging of the blood circulation movement of the living being handily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a living body monitor for determining the circulatory dynamics of a living body.

[0002]

2. Description of the Related Art A conventional biological monitor of this type is generally the one described in Japanese Patent Application Laid-Open No. Hei 7-124129. This biological monitoring device detects the amplitude of a pulse wave when a blood pressure measurement cuff compresses an artery of a living body, and obtains a pressure-volume curve as shown in FIG. 17 based on the cuff pressure and the amplitude. Was used to determine the degree of arteriosclerosis.

[0003]

However, in the conventional living body monitoring apparatus, even if the degree of arteriosclerosis can be determined, it is not possible to determine the blood circulation dynamics of the living body such as the contractile force of the heart affected by the degree. There was a problem that. In addition, there is a problem that it is impossible to distinguish between pathological arteriosclerosis and an increase in vascular resistance due to environmental changes such as low room temperature or mental tension at the time of measurement.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a pulse wave detecting means for detecting a pulse wave of a living body, and a heart which calculates a contraction time of the heart based on an output signal of the pulse wave detecting means. A device comprising: a systolic time calculating means; a circulatory state determining means for determining a blood circulation state of the living body based on an output signal of the systolic time calculating means; and a display means for displaying an output signal of the circulating state determining means. It is.

According to the above invention, the systolic time is calculated from the pulse wave of the living body, and the blood circulation dynamics of the living body such as the contractile force of the heart is determined based on the calculated systolic time. It is possible to solve the problem that it is not possible to determine the blood circulation dynamics of the living body such as the contraction force of the living body, and it is possible to easily determine the blood circulation dynamics of the living body.

The present invention also provides pulse wave detecting means for detecting a pulse wave of a living body, acceleration pulse wave calculating means for calculating an acceleration pulse wave based on an output signal of the pulse wave detecting means, and compression of an artery of the living body. Compression means, circulatory state determination means for determining the blood circulation state of the living body based on the output signal of the acceleration pulse wave calculation means when the artery is compressed by the compression means, Display means for displaying an output signal.

According to the above invention, the blood circulation dynamics of the living body such as arteriosclerosis is determined based on the waveform change of the acceleration pulse wave when the artery is compressed by the compression means. It is possible to solve the problem that it is impossible to distinguish between hardening and a low room temperature at the time of measurement or an increase in vascular resistance due to mental tension, and to accurately determine arteriosclerosis.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A living body monitoring apparatus according to a first aspect of the present invention includes a pulse wave detecting means for detecting a pulse wave of a living body, and calculates a contraction time of the heart based on an output signal of the pulse wave detecting means. Systolic time calculating means, circulatory state determining means for determining blood circulation of the living body based on an output signal of the systolic time calculating means, and display means for displaying an output signal of the circulating state determining means. Things.

Then, the systolic time is calculated from the pulse wave of the living body, and the blood circulation dynamics of the living body such as the contractile force of the heart are determined based on the calculated systolic time. can do.

According to a second aspect of the present invention, there is provided a living body monitoring device, wherein a pulse wave detecting means for detecting a pulse wave of a living body, and a systolic time for calculating a contraction time of the heart based on an output signal of the pulse wave detecting means. Calculating means, a fluctuation calculating means for calculating a pulse fluctuation based on an output signal of the pulse wave detecting means, and determining a blood circulation dynamics of the living body based on output signals of the systolic time calculating means and the fluctuation calculating means. And a display means for displaying an output signal of the circulatory state determining means.

Then, the systolic time and the fluctuation of the pulse are calculated from the pulse wave of the living body, and the blood circulation of the living body is determined based on the calculated systolic time and the fluctuation of the pulse. Can be determined.

According to a third aspect of the present invention, there is provided a living body monitoring device, comprising: a pulse wave detecting means for detecting a pulse wave of a living body; and a systolic time for calculating a systolic time of the heart based on an output signal of the pulse wave detecting means. A calculating means, a blood pressure measuring means for measuring the blood pressure of the living body, a circulatory dynamics determining means for determining a blood circulating dynamics of the living body based on output signals of the systolic time calculating means and the blood pressure measuring means, Display means for displaying an output signal of the circulatory state determining means.

Then, the systolic time is calculated from the pulse wave of the living body, the blood pressure of the living body is measured, and the blood circulation dynamics of the living body is determined based on the calculated systolic time and the measured blood pressure. Hemodynamics can be determined.

According to a fourth aspect of the present invention, there is provided a living body monitoring apparatus, wherein a pulse wave detecting means for detecting a pulse wave of a living body, and an acceleration pulse wave calculating means for calculating an acceleration pulse wave based on an output signal of the pulse wave detecting means. Means, blood pressure measuring means for measuring the blood pressure of the living body, circulating dynamics determining means for determining the blood circulating dynamics of the living body based on output signals of the acceleration pulse wave calculating means and the blood pressure measuring means, and the circulating dynamics Display means for displaying the output signal of the determination means.

Then, the acceleration pulse wave is calculated from the pulse wave of the living body, the blood pressure of the living body is measured, and the blood circulation dynamics of the living body are determined based on the calculated acceleration pulse wave and the measured blood pressure. Hemodynamics can be determined.

According to a fifth aspect of the present invention, there is provided a living body monitoring apparatus, wherein a pulse wave detecting means for detecting a pulse wave of the living body, and a systolic time for calculating a contraction time of the heart based on an output signal of the pulse wave detecting means. Calculating means, a cardiac potential detecting means for detecting a cardiac potential of the living body, and a pulse wave transit time calculating means for calculating a pulse wave transit time based on output signals of the pulse wave detecting means and the cardiac potential detecting means Circulatory dynamics determining means for determining the blood circulation dynamics of the living body based on the output signals of the systolic time calculating means and the pulse wave transit time calculating means, and display means for displaying the output signal of the circulatory dynamics determining means It is provided with.

Then, the cardiac contraction time is calculated from the pulse wave of the living body, and the pulse wave propagation time is calculated from the pulse wave and the cardiac potential of the living body. Based on the calculated cardiac contraction time and pulse wave propagation time, the blood circulation of the living body is calculated. Since the dynamics are determined, the blood circulation dynamics of the living body can be easily determined.

In the biological monitoring apparatus according to a sixth aspect of the present invention, the systole time calculating means calculates the time from the rising time point of the waveform of the output signal of the pulse wave detecting means to the waveform peak time point.

The time from the rise of the waveform of the output signal of the pulse wave detecting means to the peak of the waveform is calculated to calculate the systolic time, so that the blood circulation dynamics of the living body can be easily determined. .

According to a seventh aspect of the present invention, there is provided a living body monitoring device, comprising: a pulse wave detecting means for detecting a pulse wave of a living body; and an acceleration pulse wave for calculating an acceleration pulse wave based on an output signal of the pulse wave detecting means. Calculating means, compressing means for compressing the artery of the living body, and circulating dynamics for determining blood circulation dynamics of the living body based on an output signal of the acceleration pulse wave calculating means when the artery is compressed by the compressing means. A determination unit; and a display unit for displaying an output signal of the circulatory dynamic state determination unit.

Since the blood circulation dynamics of the living body such as arteriosclerosis is determined based on the waveform change of the acceleration pulse wave when the artery is compressed by the compression means, the pathological arteriosclerosis and the room temperature at the time of measurement may be low. An increase in vascular resistance due to an environmental change such as mental tension can be distinguished and determined.

According to a eighth aspect of the present invention, there is provided a living body monitoring apparatus, wherein a pulse wave detecting means for detecting a pulse wave of a living body, and a systolic time for calculating a systolic time of the heart based on an output signal of the pulse wave detecting means. Calculation means, acceleration pulse wave calculation means for calculating an acceleration pulse wave based on the output signal of the pulse wave detection means,
Compression means for compressing the artery of the living body, based on an output signal of the systolic time calculation means and an output signal of the acceleration pulse wave calculation means when the artery is compressed by the compression means, It is provided with a circulatory state determining means for determining a blood circulation state, and a display means for displaying an output signal of the circulating state determining means.

Then, the cardiac contraction time is calculated from the pulse wave of the living body, and the acceleration pulse wave when the artery is compressed by the compression means is calculated. Based on the calculated cardiac contraction time and the acceleration pulse wave, the cardiac contraction time is calculated. Since the blood circulation is determined, the blood circulation of the living body can be easily determined.

According to a ninth aspect of the present invention, there is provided the living body monitoring device, wherein the circulatory dynamics determination means includes a storage unit for storing the determination result, and the display means can display the storage contents of the storage unit.

Since the result of the judgment can be stored and the contents stored in the storage unit can be displayed, the transition of the result of the judgment from the past can be known, so that it is possible to properly contribute to health management.

[0026] In the living body monitoring apparatus according to a tenth aspect of the present invention, the circulatory dynamics determining means includes a personal information input section for inputting personal information such as height, weight, age, treatment contents, meal contents, exercise amount, and sleep time. The criterion can be changed based on the input value of the personal information input section.

Since the criteria can be changed on the basis of the input personal information, for example, the determination of the circulatory dynamics according to the age can be accurately performed.

Further, in the living body monitoring device according to the present invention, the circulatory dynamics determining means calculates a reference value or an upper limit value of a required amount of exercise based on the determination result; A momentum detecting section for detecting the momentum, wherein when the momentum detected by the momentum detecting section is less than the reference value or equal to or more than the upper limit of the momentum, an alarm is generated by the display means.

Then, a reference value and an upper limit value of the required amount of exercise are calculated based on the determination result. If the detected amount of exercise becomes less than the reference value or exceeds the upper limit, an alarm is generated by the display means. It can be used for health management accurately.

[0030]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a living body monitoring apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a photoelectric pulse wave detecting means for detecting a pulse wave, a photoelectric pulse wave probe 2 attached to a finger, and a pulse wave for extracting a pulse wave signal from an output signal from the pulse wave probe 2. An extraction unit 3 is provided. When using the pulse wave probe 2, the pulse wave probe 2 is used at the height of the heart. Note that a plurality of pulse wave probes 2 may be attached to a plurality of sites to detect a pulse wave. Further, the part for detecting the pulse wave is not limited to the finger, and may be another part. Although the photoelectric pulse wave probe 2 is used here, a pressure pulse wave may be detected from a wrist artery using a pressure sensor, an acceleration sensor, or the like.

Reference numeral 4 denotes a systole time calculating means for calculating a systolic time of the heart based on the output signal of the pulse wave extracting section 3 of the pulse wave detecting means 1. Reference numeral 5 denotes a pulse wave extracting section 3 of the pulse wave detecting means 1. Fluctuation calculation means for calculating the pulse fluctuation based on the output signal,
Reference numeral 6 denotes a blood circulatory state determining means, and a systolic time calculating means 4
A judgment unit 7 for judging the blood circulation dynamics of a living body in comparison with a judgment reference value based on an output signal from the pulse wave fluctuation calculation means 5 and a storage unit 8 for storing the judgment result of the judgment unit 7
And height, weight, age, treatment, diet, exercise,
A personal information input unit 9 for inputting personal information such as sleep time, an exercise amount reference value calculation unit 10 for calculating a reference value or an upper limit value of a required exercise amount based on the determination result of the determination unit 7;
An exercise amount detection unit 11 for detecting the exercise amount; Reference numeral 12 denotes a display unit that can display the determination result of the determination unit 7 and the content stored in the storage unit 8. The exercise amount detection unit 11 detects a walking amount or the like with an acceleration sensor, for example, and can be worn on a waist belt or the like.

Next, the operation and operation will be described. The pulse wave probe 2 is attached to the finger as shown in FIG. 1 to start measuring the pulse wave. FIG. 2 is a flowchart showing the operation procedure of this embodiment. First, a pulse wave is detected by the pulse wave detecting means 1 in step ST1. Here, the pulse wave signal detected by the pulse wave probe 2 may cause the base line to fluctuate due to the movement of the body or the like. Therefore, the pulse wave signal is output by the pulse wave extraction unit 3 in accordance with each detected pulse wave signal. , A plurality of pulse wave waveforms for each beat are extracted, the base lines are combined and averaged to obtain an average pulse wave waveform. FIG. 3 shows a typical pulse waveform obtained in this manner. FIG. 3 (a) is seen in a healthy adult, is called a post-normal ridge, and FIG. 3 (b) is a hypertension. Is seen in the elderly and atherosclerotic, and is called anterior ridge. The pulse wave interval Pi may be obtained as needed based on this waveform, and the time axis of the original pulse wave waveform may be corrected. This is because there is an individual difference in the pulse rate, and it is necessary to correct the individual difference in the temporal element among the characteristic amounts of the pulse waveform described later. For the correction equation, for example, Bazzet (Bazzet, H, C., 1) shown in (Equation 1)
920).

[0034]

(Equation 1)

Subsequently, in step ST2, the systolic time calculating means 4 calculates the systolic time Tu of the heart. The cardiac contraction time Tu is calculated as the time from the rising point S of the pulse wave waveform of FIG. Then, in step ST3, the determination part 7 of the circulatory dynamics determination means 6 determines whether the cardiac contraction time Tu is longer than the determination reference value Tu0. When the cardiac power decreases, the cardiac contraction time Tu is extended to compensate for the cardiac output. If Tu is greater than the determination reference value Tu0, the determination unit 7 determines in step ST4 that the cardiac contraction power, that is, the cardiac power, is greater than the determination reference value Tu0. It is determined that it has decreased. The determination result is displayed in the display unit 1 in step ST5.
2 is displayed. If the cardiac contraction time Tu is equal to or less than the determination reference value Tu0 by the determination unit 7 in step ST3, the determination unit 7 determines that the cardiac power is normal in step ST6, and the determination result is displayed on the display unit 12 in step ST5. .

The determination result may be stored in the storage unit 8 of the determination unit 7, and the stored content can be displayed on the display unit 12. The determination reference value Tu0 used in the determination unit 7 may be changed based on the input value of the personal information input unit 9. For example, when the age is input from the personal information input unit 9 and the value of the determination reference value Tu0 is changed according to the age, the value is changed so that the value of the determination reference value Tu0 increases as the age increases.

Based on the determination result of the determination unit 7, a reference value and an upper limit of a required amount of exercise are calculated by an exercise amount reference value calculation unit 10, and the amount of exercise detected by the amount of exercise detection unit 11 becomes smaller than the reference value or When the value is equal to or more than the upper limit value, an alarm may be generated by the display unit 12. For example, if it is determined that your mental strength is decreasing,
The required reference value and upper limit of the amount of exercise are calculated lower than when it is determined that the heart strength is normal, so that an excessive load is not applied to the heart.

In the above, the operation procedure when the determination unit 7 determines the presence or absence of a decrease in cardiac power based on the contraction time of the heart has been described. Next, the determination unit 7 calculates the heart contraction time calculated by the cardiac contraction time calculation means 4. An operation procedure for determining the blood circulation dynamics based on the contraction time Tu and the pulse fluctuation Fr calculated by the fluctuation calculation means 5 will be described. The fluctuation calculating means 5 calculates a pulse fluctuation Fr based on the output signal of the pulse wave detecting means 1. F
For example, r may be obtained by calculating the pulse wave interval Pi for each beat and calculating the standard deviation of the data series of the pulse wave interval Pi obtained in a certain unit time. The determination unit 7 determines the blood circulation dynamics based on the heart contraction time Tu and the pulse fluctuation Fr thus obtained. FIG. 4 shows the cardiac contraction time Tu for making the determination,
This shows the relationship between the pulse fluctuation Fr and the determination results D1 to D4. In the figure, Tu0 and Fr0 are the respective reference values for cardiac contraction time and pulse fluctuation.

It is generally said that pulse stress decreases when stress is applied. Accordingly, in FIG. 4, when the cardiac contraction time Tu is equal to or less than the judgment reference value Tu0 and the pulse fluctuation Fr is larger than the judgment reference value Fr0 as in D1, the heart is in a normal state without stress and the heart is normal. It is determined that there is. As shown in D2, the heart contraction time Tu is equal to or less than the judgment reference value Tu0, and the pulse fluctuation Fr is equal to the judgment reference value Fr.
In the case of 0 or less, the heart strength is normal but stress is applied, and the heart contraction time Tu is larger than the criterion value Tu0 and the pulse Fr seems to be the criterion value Fr0 as in D3.
In the case of a larger value, in a state where the cardiac strength is reduced but no stress is applied, it is determined that any of the areas is a boundary region to a decrease in the heart function. When the cardiac contraction time Tu is larger than the criterion value Tu0 and the pulse fluctuation Fr is equal to or less than the criterion value Fr0 as in D4, the heart function is reduced and stress is applied, so that the heart function is reduced and caution is required. judge. Note that the value of the pulse fluctuation determination reference Fr0 may be changed based on the input value of the personal information input unit 9.

According to the first embodiment of the present invention, the systolic time is calculated from the pulse wave of the living body, and the blood circulation dynamics such as the contractile force of the heart is determined based on the calculated systolic time Tu. It is possible to easily determine the blood circulation dynamics of a living body.

Further, the systolic time and pulse fluctuation are calculated from the pulse wave of the living body, and the calculated systolic time and pulse fluctuation f are calculated.
Since the blood circulation dynamics of the living body is determined based on r, the blood circulation dynamics of the living body can be easily determined.

The cardiac contraction time Tu is calculated by calculating the time from the rising point S of the waveform of the output signal of the pulse wave detecting means 1 to the waveform peak point P, so that the blood circulation dynamics of the living body can be easily determined. can do.

Also, since the judgment result can be stored and the contents stored in the storage unit 8 can be displayed, the transition of the judgment result from the past can be known, which is useful for health management.

Further, since the criterion can be changed based on the input personal information, it is possible to determine the circulatory dynamics according to, for example, the age.

Further, a reference value and an upper limit value of the required amount of exercise are calculated based on the determination result, and if the detected amount of exercise becomes less than the reference value or exceeds the above upper limit, the display means 1 is displayed.
2 generates an alarm, which is useful for health management.

(Embodiment 2) A biological monitoring apparatus according to Embodiment 2 of the present invention will be described below. FIG. 5 is a block diagram of the second embodiment. In the second embodiment, except for the pulse wave detecting means 1,
Components having the same reference numerals as those in the first embodiment have the same structure and function, and detailed description will be omitted. The difference from the first embodiment is that
As shown in FIG. 5, a blood pressure measuring means 13 for measuring blood pressure and an acceleration pulse wave calculating means 17 for calculating an acceleration pulse wave based on an output signal of the pulse wave detecting means 1 are provided. The point is that the blood circulation dynamics is determined based on the output signals of the means 4, the blood pressure measuring means 13 and the acceleration pulse wave calculating means 17. As shown in FIG. 5, the blood pressure measuring means 13 includes a cuff 14 attached to the upper arm, a pressure adjusting unit 14a for increasing / decreasing the pressure in the cuff 14, a pressure detecting unit 15 for detecting the pressure in the cuff 14, A pulse wave detecting unit for detecting a pulse wave signal from an output signal of the detecting unit; and a blood pressure calculating unit for calculating a systolic blood pressure and a diastolic blood pressure based on the output signals of the pressure detecting unit and the pulse wave detecting unit. Have. In the above, cuff 14
Was attached to the upper arm, but may be attached to the wrist or finger.

Next, the operation and operation will be described. FIG. 6 is a flowchart showing the operation procedure of this embodiment. First, in step ST7, the cuff 14 is pressurized by the pressure adjusting unit 14a to press the upper arm, and the pressure detecting unit 15 increases the pressure in the cuff 14 until the cuff pressure reaches a predetermined pressure. Then, in step ST8, the pressure of the cuff is reduced, and in step ST8,
In step 9, a pulse wave signal is extracted by the pulse wave detecting means 1 from the pressure signal detected by the pressure detecting section 15 at the time of the pressure reduction. In step ST10, the pressure at the time when the pulse wave signal is started to be detected by the pulse wave detection means 1 is calculated as the systolic blood pressure by the blood pressure calculation unit 16, and the pressure at the time when the amplitude change of the pulse wave signal stops is calculated as the diastolic blood pressure. In step ST11, the systolic time calculating means 4 calculates the systolic time of the heart after the blood pressure calculating section 16 calculates the diastolic blood pressure. The calculation procedure of the contraction time Tu of the heart is the same as in the first embodiment. Then, in step 12, the blood circulation dynamics are determined by the determination unit 7. FIG. 7 shows the contraction time of the heart and the contraction time Tu and the blood pressure Bp of the heart when making the above determination.
And the results of determination results D5 to D8. In the figure, the systolic times Tu0 and Bp0 are criteria. Here, Bp is assumed to be the systolic blood pressure or the diastolic blood pressure.

In FIG. 7, the systole time Tu as indicated by D5 is shown.
Is equal to or less than the judgment reference value Tu0 and the blood pressure Bp is equal to the judgment reference value Bp0.
In the following cases, since the heart strength is normal and the blood pressure is normal, it is determined that both the heart and the vascular resistance are normal. When the systolic time Tu is equal to or less than the determination reference value Tu0 as in D6, the blood pressure B
When p is larger than the criterion value Bp0, a state in which the cardiac power is increased in response to an increase in the vascular resistance such as arteriosclerosis and the blood pressure is increased to secure the cardiac output, If the continuation is continued, it is determined that the state is a transition state in which the burden cannot be tolerated and the mental strength is reduced. As shown in D7, the systolic time Tu is larger than the criterion value Tu0 and the blood pressure Bp is equal to the criterion value Bp0.
In the case of larger, the increase in vascular resistance such as arteriosclerosis continued for a long period of time, so that it could not bear the burden and the heart strength decreased,
In the state where the cardiac output is secured by increasing the blood pressure by prolonging the systolic time, if this state continues, the boundary area shifts to a dangerous state where the cardiac output cannot be secured even by prolonging the systolic time Is determined. When the systolic time Tu is larger than the cardiac judgment reference value Tu0 and the blood pressure Bp is equal to or less than the judgment reference value Bp0 as in D8, the blood vessel resistance such as arteriosclerosis further increases, and the blood pressure is also increased by prolonging the systolic time. In a dangerous state in which the cardiac output cannot be secured without being raised, it is determined that the possibility of occurrence of heart failure or the like is high and attention is required. The determination result is displayed on the display means 12 in step ST13. The values of the systolic time Tu0 and the blood pressure determination reference value Bp0 may be changed based on the input values of the personal information input unit 9.

The operation procedure in which the determination unit 7 determines the circulatory dynamics of the blood based on the systolic time and the blood pressure of the heart has been described above. Next, the determination unit 7 calculates the blood pressure and the acceleration pulse wave calculated by the blood pressure calculation means 13. An operation procedure for determining the blood circulation dynamics based on the acceleration pulse wave calculated by the calculation means 17 will be described.
The acceleration pulse wave calculating means 17 calculates the acceleration pulse wave by differentiating the output signal of the pulse wave detecting means 1 twice after the blood pressure calculating section 16 calculates the diastolic blood pressure. Then, the determination unit 7 classifies the calculated acceleration pulse wave into several waveform patterns.
FIG. 8 shows the classification of the acceleration pulse wave pattern at that time, which is classified into seven from A to G. In this classification method, as described in Koyamauchi et al. (1985), for example, classification is performed based on the positional relationship between the peaks a to e of the acceleration pulse wave.
It is said that when blood circulation dynamics deteriorate due to a decrease in heart strength, arteriosclerosis, etc., the state shifts from A to G in order.

The determination section 7 determines the blood circulation dynamics based on the classification results of the waveform patterns A to G and the blood pressure Bp.
FIG. 9 shows the relationship between waveform patterns A to G, blood pressure Bp, and determination results D9 to D12 when making a determination. Here, D9 to D12 in FIG. 9 correspond to D5 to D8 in FIG. 7, respectively, and the same determination is performed, so that the description here is omitted.

According to the second embodiment of the present invention, the systolic time is calculated from the pulse wave of the living body, the blood pressure of the living body is measured, and the blood circulation dynamics of the living body is calculated based on the calculated systolic time and the measured blood pressure. Since the determination is made, the blood circulation dynamics of the living body can be easily determined.

In addition, the acceleration pulse wave is calculated from the pulse wave of the living body, the blood pressure of the living body is measured, and the blood circulation dynamics of the living body is determined based on the calculated acceleration pulse wave and the measured blood pressure. Hemodynamics can be determined.

(Embodiment 3) A living body monitoring apparatus according to Embodiment 3 of the present invention will be described below. FIG. 10 is a block diagram of the third embodiment. In the third embodiment, components having the same structure and function as those of the first embodiment are denoted by the same reference numerals, and detailed description is omitted. The difference from the first embodiment is that FIG.
Calculates the pulse wave propagation time based on the output signals of the cardiac potential detecting means 18 for detecting the cardiac potential as described above, the pulse extracting section 3 of the pulse wave detecting means 1 and the cardiac potential calculating section 21 of the cardiac potential detecting means 18. Pulse wave transit time calculating means 22 for determining the blood circulation dynamics based on the output signals of the systolic time calculating means 4 and the pulse wave transit time calculating means 22. An electrocardiographic detecting means 18 includes an electrocardiographic electrode 19 attached to both wrists,
20 and a cardiac potential calculator 21 for extracting a cardiac potential from output signals of the electrodes 19 and 20 for cardiac potential.

Next, the operation and operation will be described. FIG.
5 is a flowchart showing the operation procedure of the present embodiment.
First, in steps ST14 and ST15, the same processing as in steps ST1 and ST2 in FIG. 2 of the first embodiment is performed. Next, at step 16, the cardiac potential is detected by the cardiac potential detecting means 18. In step ST17, the pulse wave transit time is calculated by the pulse wave transit time calculating means 22. The pulse wave calculation time is obtained by calculating a time difference between the peak time of the pulse wave waveform detected by the pulse wave detecting means 1 and the peak time of the R wave of the cardiac potential detected by the cardiac potential detecting means 18. Then, in step ST18, the circulatory dynamics of the blood is determined by the determination unit 7 based on the contraction time of the heart, the contraction time Tu of the heart, and the pulse wave propagation time Ptt. FIG. 12 shows the heart contraction time Tu, the pulse wave transmission time Ptt, and the determination results D13 to D when making the determination.
15 shows the relationship. In the figure, the systole time Tu
0 and Ptt0 are criteria.

It is generally known that as the degree of arteriosclerosis increases, the pulse wave transit time becomes shorter. Accordingly, in FIG. 12, the cardiac contraction time Tu is equal to the determination reference value Tu as indicated by D13.
If the pulse wave transmission time Ptt is 0 or less and the pulse wave transmission time Ptt is larger than the determination reference value Ptt0, it is determined that both the heart and the vascular resistance are normal because the heart strength is normal and the pulse wave propagation time is long. D14
When the cardiac contraction time Tu is equal to or less than the criterion value Tu0 and the pulse wave propagation Ptt is equal to or less than the criterion value Ptt0, the heart force is increased in response to an increase in vascular resistance such as arteriosclerosis, thereby increasing blood pressure and increasing cardiac output. If such a state of increased heart strength continues while the amount is secured, it is determined that the state is a transition state in which the burden cannot be tolerated and the state shifts to a decrease in heart strength. When the cardiac contraction time Tu is larger than the criterion value Tu0 and the pulse wave propagation Ptt is equal to or less than the criterion value Ptt0 as in D15, the increase in vascular resistance such as arterial stiffness has continued for a long period of time, and it is difficult to withstand the burden and the heart strength is low. In a state where the blood pressure has been increased and the cardiac output has been secured by prolonging the systolic time, the cardiac output cannot be secured even if the cardiac contraction time is prolonged if this condition continues. It is determined that the boundary area is to be shifted. The determination result is displayed on the display means 12 in step ST19. It should be noted that the values of the cardiac contraction time Tu0 and the determination reference value Ptt0 of the pulse wave propagation time may be changed based on the input value of the personal information input unit 9.

According to the third embodiment of the present invention, the systolic time is calculated from the pulse wave of the living body, the pulse wave propagation time is calculated from the pulse wave and the cardiac potential of the living body, and the calculated systolic time and pulse wave are calculated. Since the blood circulation of the living body is determined based on the propagation time, the blood circulation of the living body can be easily determined.

(Embodiment 4) A biological monitoring apparatus according to Embodiment 4 of the present invention will be described below. FIG. 13 is a block diagram of the fourth embodiment. In the fourth embodiment, components having the same structure and function as those of the first to third embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted. The difference from the first to third embodiments is that a cuff 14 as a compression unit for compressing an artery of the upper arm as shown in FIG. 13 and a blood pressure measurement unit 13 having the cuff 14
A pulse wave detecting means 1 for detecting a pulse wave from a finger on the distal side of the upper arm, and an acceleration pulse wave calculating means for calculating an acceleration pulse wave based on an output signal from a pulse wave extracting section 3 of the pulse wave detecting means 1 1
And the determination unit 7 determines the blood circulation dynamics of the living body based on the output signal of the systolic time calculation means 4 and the output signal of the acceleration pulse wave calculation means 17 when the artery is compressed by the compression means 14. The point is to judge. Reference numeral 23 denotes a pulse wave detection unit that extracts a pulse wave from an output signal of the pressure detection unit 15, and a blood pressure calculation unit 16 calculates a blood pressure based on output signals from the pressure detection unit 15 and the pulse wave calculation unit 23.

Next, the operation and operation will be described. FIG.
5 is a flowchart showing the operation procedure of the present embodiment.
First, in step ST20, the cuff 7 is
Is pressed to press the upper arm, and the pressure detecting unit 15 increases the pressure in the cuff 14 until the cuff pressure reaches a predetermined pressure. Then, in step ST21, depressurization of the cuff is started by the pressure adjusting unit 14a, and in step ST22, the pulse wave detecting unit 23 extracts a pulse wave signal from the pressure signal detected by the pressure detecting unit 15 at the time of depressurizing. In step ST23, the blood pressure calculation unit 16
Accordingly, the pressure at the time when the pulse wave signal is started to be detected by the pulse wave detecting unit 23 is calculated as the systolic blood pressure, and the pressure at the time when the amplitude change of the pulse wave signal stops being calculated as the diastolic blood pressure. Step ST24
After the blood pressure calculator 16 calculates the diastolic blood pressure, the acceleration pulse wave calculator 17 calculates the acceleration pulse wave from the pulse wave detected by the finger.

Here, the change of the acceleration pulse wave when the cuff is depressurized will be described. FIG. 15 schematically shows a change in the waveform pattern of the acceleration pulse wave during pressure reduction. FIG. 15 (a)
Is a temporal change of the cuff pressure Pc, and P1 and P2 indicate a systolic blood pressure and a diastolic blood pressure, respectively. FIGS. 15 (b) and 15 (c) show acceleration pulse waves of a person who has no arteriosclerosis but has a low room temperature or has increased vascular resistance due to mental tension, and an acceleration pulse wave of a person who has arteriosclerosis. 15 shows waveforms at times t = t1 and t = t2 in FIG. As shown in FIG. 15, at t = t2 when the cuff is not pressurized, FIG.
As shown in FIG. 15 (c), the acceleration pulse wave waveform of the finger when the upper arm is in the pressurized state at t = t1 is added even if the acceleration pulse wave waveform is the E pattern in both cases as shown in FIG. 15 (c). Since the vascular resistance due to tension is released by the pressure, the waveform shows the A pattern. On the other hand, in the case of FIG. 15B, since the blood vessel itself originally has arteriosclerosis, the waveform pattern does not change even if the pressure is applied.

Therefore, in step 25, the judgment unit 7
At t = t1 in the decompression process, it is compared whether or not the waveform of the acceleration pulse wave indicates the A pattern. If the waveform indicates the A pattern, the determination unit 7 determines in step 26 that there is no arteriosclerosis and that the waveform is normal. The determination result is displayed in the display unit 1 in step ST27.
2 is displayed. If the pattern A is not shown in step 25, the determination section 7 determines that arteriosclerosis is present in step ST28, and the determination result is the display means 1 in step ST27.
2 is displayed. Note that the acceleration waveform compared at t = t1 is not limited to the A pattern, and may be another waveform pattern.

The determination unit 7 determines the blood circulation dynamics of the living body on the basis of the output signal of the systole time calculation means 4 and the output signal of the acceleration pulse wave calculation means 17 when the compression means 14 is compressing the upper arm artery. It may be determined. FIG. 16 shows the relationship between the contraction time Tu of the heart when making a determination, the presence or absence of arteriosclerosis obtained from the change in the acceleration pulse wave when the artery in the upper arm is compressed, and the determination results D16 to D18. It is. D16 to D18 in the figure are D13 in FIG.
To D15.

According to the fourth embodiment of the present invention, the pressing means 14
The blood circulation dynamics of the living body such as arteriosclerosis is determined based on the change in the waveform of the acceleration pulse wave when the artery is compressed, so pathological arteriosclerosis and low room temperature during measurement or mental tension The determination can be made separately from the increase in the vascular resistance due to the change.

Further, the cardiac contraction time is calculated from the pulse wave of the living body, and the acceleration pulse wave when the artery is compressed by the compression means is calculated. Based on the calculated cardiac contraction time and the acceleration pulse wave, the body contraction time is calculated. Since the blood circulation is determined, the blood circulation of the living body can be easily determined.

In each of the embodiments described above, the present invention is applied to a human body. However, the present invention may be applied to animals other than humans.

[0065]

As described above, the living body monitoring apparatus according to the first aspect of the present invention calculates the contraction time from the pulse wave of the living body, and calculates the contraction time of the heart based on the calculated contraction time. Is determined, the blood circulation of the living body can be easily determined.

The living body monitor according to claim 2 is
Calculate the systolic time and pulse fluctuation from the pulse wave of the living body, and determine the blood circulation dynamics of the living body based on the calculated systolic time and pulse fluctuation, so that the blood circulation dynamics of the living body can be easily determined. it can.

Further, the living body monitoring device according to the third aspect calculates the systolic time from the pulse wave of the living body, measures the blood pressure of the living body, and based on the calculated systolic time and the measured blood pressure, the blood circulation of the living body. Since the dynamics are determined, the blood circulation dynamics of the living body can be easily determined.

The living body monitor according to claim 4 is
Since the acceleration pulse wave is calculated from the pulse wave of the living body, the blood pressure of the living body is measured, and the blood circulation dynamics of the living body are determined based on the calculated acceleration pulse wave and the measured blood pressure. can do.

The living body monitor according to claim 5 is
Since the cardiac contraction time is calculated from the pulse wave of the living body, the pulse wave transit time is calculated from the pulse wave of the living body and the cardiac potential, and the blood circulation dynamics of the living body is determined based on the calculated cardiac contraction time and pulse wave transit time. It is possible to easily determine the blood circulation dynamics of the living body.

The living body monitor according to claim 6 is
The cardiac contraction time is calculated by calculating the time from the rising point of the waveform of the output signal of the pulse wave detecting means to the waveform peak, so that the blood circulation dynamics of the living body can be easily determined.

The living body monitor according to claim 7 is:
The blood circulation dynamics of the living body such as arteriosclerosis is determined based on the waveform change of the acceleration pulse wave when the artery is compressed by the compression means. An accurate determination can be made while distinguishing from an increase in vascular resistance.

The living body monitoring device according to claim 8 is
Calculate the cardiac contraction time from the pulse wave of the living body, and calculate the acceleration pulse wave when the artery is compressed by the compression means,
Since the blood circulation dynamics of the living body are determined based on the calculated cardiac contraction time and the acceleration pulse wave, the blood circulation dynamics of the living body can be easily determined.

The living body monitoring device according to claim 9 is
Since the determination result can be stored and the storage content of the storage unit can be displayed, the transition of the determination result from the past can be known, which can be useful for health management.

Further, since the living body monitoring device according to the tenth aspect can change the criterion based on the input personal information, for example, it is possible to accurately determine the circulatory dynamics according to the age.

Further, the living body monitoring device according to the eleventh aspect calculates a reference value and an upper limit value of the required amount of exercise based on the determination result, and the detected amount of exercise becomes less than the reference value or exceeds the upper limit value. In this case, an alarm is generated by the display means, so that the display can be overlooked.

[Brief description of the drawings]

FIG. 1 is a block diagram of a living body monitoring device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation procedure of the apparatus.

3A is a characteristic diagram showing a typical pulse wave waveform seen in a healthy adolescent; FIG. 3B is a characteristic diagram showing a typical pulse wave waveform seen in a hypertensive person and the like;

FIG. 4 is a characteristic diagram showing a result of determination by the apparatus in terms of a relationship between a systolic time and a pulse fluctuation.

FIG. 5 is a block diagram of a biological monitoring device according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing an operation procedure of the apparatus.

FIG. 7 is a characteristic diagram showing a determination result by the device in a relationship between a systolic time and a blood pressure.

FIG. 8 is a characteristic diagram showing a waveform pattern classification of an acceleration pulse wave used in the apparatus.

FIG. 9 is a characteristic diagram showing a relationship between a blood pressure pattern and a waveform pattern of an acceleration pulse wave used in the apparatus.

FIG. 10 is a block diagram of a living body monitoring device according to a third embodiment of the present invention.

FIG. 11 is a flowchart showing an operation procedure of the apparatus.

FIG. 12 is a characteristic diagram showing a result of determination by the apparatus in terms of a relationship between a systolic time and a pulse wave transit time.

FIG. 13 is a block diagram of a biological monitoring device according to a fourth embodiment of the present invention.

FIG. 14 is a flowchart showing an operation procedure of the apparatus.

FIG. 15 (a) is a characteristic diagram showing a time-dependent waveform of an acceleration pulse wave when the cuff is depressurized. (B) A waveform change of the acceleration pulse wave when the cuff is depressed in a person whose blood vessels are increasing due to mental tension. (C) Characteristic diagram showing waveform change of acceleration pulse wave at the time of cuff decompression for a person with arteriosclerosis

FIG. 16 is a characteristic diagram showing a determination result in the same device as a relationship between a systolic time and the presence or absence of arteriosclerosis.

FIG. 17 is a characteristic diagram showing a pressure-volume curve of a conventional biological monitoring device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pulse wave detecting means 4 systolic time calculating means 5 fluctuation calculating means 6 circulatory dynamics determining means 8 storage section 9 personal information input section 10 exercise amount reference value calculating section 11 exercise amount detecting section 12 display means 13 blood pressure measuring means 17 acceleration pulse wave calculating Means 18 Cardiac potential detecting means 22 Pulse wave transit time calculating means

Claims (11)

[Claims] 1. A pulse wave detecting means for detecting a pulse wave of a living body, a systolic time calculating means for calculating a contraction time of a heart based on an output signal of the pulse wave detecting means, and an output of the systolic time calculating means. A living body monitoring device comprising: a circulatory state determining unit that determines a blood circulation state of the living body based on a signal; and a display unit that displays an output signal of the circulating state determining unit. 2. A pulse wave detecting means for detecting a pulse wave of a living body, a systolic time calculating means for calculating a contraction time of the heart based on an output signal of the pulse wave detecting means, and an output signal of the pulse wave detecting means. Fluctuation calculating means for calculating a pulse fluctuation based on the following: circulating dynamics determining means for determining the blood circulation dynamics of the living body based on the output signals of the systolic time calculating means and the fluctuation calculating means; and the circulating dynamics determining means And a display means for displaying the output signal of the biological monitor. 3. A pulse wave detecting means for detecting a pulse wave of a living body, a systolic time calculating means for calculating a contraction time of a heart based on an output signal of the pulse wave detecting means, and a blood pressure for measuring a blood pressure of the living body. Measurement means, circulatory state determination means for determining the blood circulation state of the living body based on the output signals of the systole time calculation means and the blood pressure measurement means, and display means for displaying the output signal of the circulatory state determination means A biological monitoring device comprising: 4. A pulse wave detecting means for detecting a pulse wave of a living body, an acceleration pulse wave calculating means for calculating an acceleration pulse wave based on an output signal of the pulse wave detecting means, and a blood pressure measurement for measuring a blood pressure of the living body Means, circulatory state determining means for determining the blood circulation state of the living body based on the output signals of the acceleration pulse wave calculating means and the blood pressure measuring means, and display means for displaying the output signal of the circulating state determination means. Biological monitoring device provided. 5. A pulse wave detecting means for detecting a pulse wave of a living body, a cardiac contraction time calculating means for calculating a contraction time of a heart based on an output signal of the pulse wave detecting means, and detecting a cardiac potential of the living body. Cardiac potential detecting means, pulse wave transit time computing means for computing pulse wave transit time based on output signals of the pulse wave detecting means and the cardiac potential detecting means, cardiac contraction time computing means, and the pulse wave transit time A living body monitoring device comprising: a circulatory state determining unit that determines the blood circulation state of the living body based on an output signal from the arithmetic unit; and a display unit that displays an output signal of the circulating state determining unit. 6. The living body monitoring apparatus according to claim 1, wherein the systolic time calculating means calculates a time from a rising time point of the waveform of the output signal of the pulse wave detecting means to a waveform peak time point. 7. A pulse wave detecting means for detecting a pulse wave of a living body, an acceleration pulse wave calculating means for calculating an acceleration pulse wave based on an output signal of the pulse wave detecting means, and a compressing means for compressing an artery of the living body A circulatory state determining unit that determines a blood circulation state of the living body based on an output signal of the acceleration pulse wave calculating unit when the artery is compressed by the compression unit; and an output signal of the circulatory state determining unit. A biological monitor device comprising a display unit for displaying. 8. A pulse wave detecting means for detecting a pulse wave of a living body, a systole time calculating means for calculating a contraction time of the heart based on an output signal of the pulse wave detecting means, and an output signal of the pulse wave detecting means. Acceleration pulse wave calculating means for calculating an acceleration pulse wave based on, a compression means for compressing the artery of the living body, and an output signal of the systole time calculation means and the compression means when the artery is compressed by the compression means. A living body monitor apparatus comprising: a circulatory state determining unit that determines the blood circulation state of the living body based on an output signal of the acceleration pulse wave calculating unit; and a display unit that displays an output signal of the circulating state determining unit. 9. The living body monitoring apparatus according to claim 1, wherein the circulatory dynamics determining unit includes a storage unit that stores the determination result, and the display unit can display the contents stored in the storage unit. 10. The circulatory dynamics determining means includes height, weight, age,
10. The personal information input unit according to claim 1, further comprising a personal information input unit capable of inputting personal information such as treatment content, meal content, exercise amount, and sleep time, wherein a determination criterion can be changed based on an input value of the personal information input unit. Biological monitoring device. 11. A circulatory dynamics determining means comprising: a momentum reference value calculating section for calculating a reference value or an upper limit value of a required amount of exercise based on the determination result; and a momentum detecting section for detecting a momentum of the living body. The living body monitor device according to any one of claims 1 to 9, wherein when the amount of exercise detected by the unit is less than the reference value or equal to or more than the upper limit of the amount of exercise, an alarm is generated by the display means.