JP2002028140A - Cardiac function monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cardiac function monitor capable of managing the healthy condition of a subject by precisely recognizing the reserve capacity of the heart of the subject in motion indirectly and continuously and monitoring the reserve power of the heart. SOLUTION: The cardiac function monitor is portable, comprising at least a measuring means, an operating means, a control means, a memory means and a data providing means. The cardiac function monitor continuously measures a value to be measured caused by the displacement of the vascular wall, operates the displacement of the vascular wall based on the measured value, operates prescribed parameter for recognizing the reserve capacity based on the continuously operated value of the displacement of the vascular wall, judges whether the prescribed parameter is within a set standard range or not, and provides data when the prescribed parameter is out of the standard range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardiac function monitoring device that contributes to the health management of a subject by measuring cardiac reserve and recognizing the state of cardiac reserve.

[0002]

2. Description of the Related Art Hitherto, various devices have been developed for measuring the heart rate of a subject and monitoring the condition. For example, Japanese Patent Application Laid-Open No. 5-29389 discloses an input unit for inputting subject information such as age, heart rate detecting means for detecting a heart rate of a subject during exercise, and a subject's heart rate based on subject information input from the input unit. CP for calculating the maximum heart rate and calculating the degree of exercise load applied to the subject during exercise from the maximum heart rate and the heart rate from the heart rate detecting means
A device having a U and a display unit for displaying the exercise load degree in a bar graph is disclosed, and the device can display the intensity of exercise with respect to the maximum heart rate.

[0003] However, when performing rehabilitation for rehabilitation, exercise such as jogging, marathon, golf, or sports training for the purpose of health promotion, the subject's heart function and body condition are accurately recognized. For this reason, simply measuring the heart rate is not enough.Exercise beyond the reserve of the heart can lead to accidents such as sudden death, so it is necessary to monitor cardiac reserve by measuring cardiac reserve. It becomes important.

[0004] The above-mentioned cardiac reserve cannot be recognized only by measuring the heart rate, and it is necessary to measure the cardiac reserve during exercise or the like in order to monitor the cardiac reserve. For this reason, it is impossible to monitor cardiac reserve by measuring cardiac reserve with a device for simply measuring the heart rate, such as the above-mentioned Japanese Patent Application Laid-Open No. Hei 5-29389.

[0005] On the other hand, from the viewpoint of physiological theory, the heart intermittently pumps blood into blood vessels, and each stroke of the blood produces a continuous pulse wave due to the elasticity of the blood vessels. The shape of the pulse wave not only corresponds to the pulse rate (heart rate),
It is divided into phases corresponding to the systole and diastole of the heart. Therefore, the pulse wave shape includes not only physical information of blood vessels but also information of cardiac functions such as heart rate, cardiac contractility, and cardiac output.

The pulse wave shape of the living body has been measured as a volume pulse wave and a pressure pulse wave by the sensing method.
Among the measurement of the volume pulse wave, the pulse wave measurement of the fingertip volume pulse wave is
The change in volume of the detected part is measured by a photoelectric conversion element. The fingertip plethysmogram can continuously measure a pulse wave, but has the disadvantage that there is little cardiac function information in the pressure pulse wave of the small artery, especially if there is arteriosclerosis on the central side of the measurement site. The measurement information cannot accurately measure even the pulse rate.

On the other hand, the pressure pulse wave is converted into photoelectric pressure, air pressure,
Although pulse waves of arterioles and arterioles can be measured by a method such as AC resistance conversion, there is no device that is lightweight and can be used for measurement during long-term operation. In addition, many non-invasive measurements of intravascular arterial pressure pulse waves use Korotov sounds and the like, but this is often used for long-term continuous measurement due to intermittent pressurization of the cuff with a compressor. There are technical difficulties.
Similarly, invasive measurements performed in clinical settings are performed by doctors inserting catheters, monitoring, etc.
It is more difficult to use for long-term continuous measurement.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a method of non-invasively and continuously accurately recognizing a cardiac reserve of a subject or the like during exercise. It is an object of the present invention to provide a heart function monitoring device capable of monitoring a force and managing a good health condition of a subject.

It is another object of the present invention to monitor a heart function which can be easily worn on the chest, arm, wrist, etc., is lightweight, does not burden the subject who wears it, and is unrestricted and has excellent comfort for the wearer. It is intended to provide a device.

[0010]

The heart function monitoring apparatus of the present invention is portable with at least a measuring means, a calculating means, a controlling means, a storing means, and an information providing means. The value is continuously measured, a vascular wall displacement is calculated from the measured value, and a predetermined parameter value capable of recognizing cardiac reserve based on the continuous calculated value of the vascular wall displacement is calculated,
It is characterized in that it is determined whether or not the predetermined parameter value is within the set standard range, and information is provided based on the fact that the predetermined parameter value is out of the standard range. For setting the standard range, an appropriate range is set based on age, gender, and the like, and the setting can be appropriately changed as necessary.

Further, in the heart function monitoring apparatus according to the present invention, in the heart function monitoring apparatus, the predetermined parameter value is a double product equivalent amount calculated by multiplying a heart rate by a systolic equivalent displacement, a total systolic displacement amount, Alternatively, it is any one of the total diastolic displacement.

Further, in the heart function monitoring apparatus according to the present invention, in the heart function monitoring apparatus, the predetermined parameter value is a double product equivalent amount calculated by multiplying a heart rate by a systolic equivalent displacement, a total systolic displacement amount, Alternatively, any two of the total diastolic displacement are characterized.

Further, in the cardiac function monitoring apparatus according to the present invention, in the above-mentioned cardiac function monitoring apparatus, the predetermined parameter value may be a double product equivalent calculated by multiplying a heart rate by a systolic equivalent displacement, a total systolic displacement, And the total amount of diastolic displacement. In addition, the predetermined parameter value is not a double product equivalent, which is calculated by multiplying the heart rate by the systolic equivalent displacement, the total systolic displacement, and the total diastolic displacement. Any appropriate one can be adopted as long as it can be obtained based on the value.

Further, in the cardiac function monitoring apparatus according to the present invention, in the above-mentioned cardiac function monitoring apparatus, preliminary information is provided based on one of the predetermined parameter values being out of the standard range. The information is provided based on one of the predetermined parameter values falling outside the standard range.

Further, according to the heart function monitoring apparatus of the present invention, in the heart function monitoring apparatus, preliminary information is provided based on the fact that two of the predetermined parameter values fall outside the standard range. The information is provided based on one of the predetermined parameter values falling outside the standard range.

Further, the heart function monitoring device according to the present invention is the heart function monitoring device according to the above-mentioned heart function monitoring device, wherein:
The systolic displacement total amount, or the diastolic displacement total amount or a predicted value by the prediction calculation is calculated based on the calculated value of the combination thereof, it is determined whether the predicted value is within a set standard range, the predicted value is Being out of the standard range is a basis for providing the information at a predetermined time. As a result, it is possible to recognize in advance the reserve of the heart after a predetermined time has elapsed or after a predetermined amount of exercise, and to know the real time of the optimal amount of exercise.

Further, the heart function monitoring device according to the present invention is the above-mentioned heart function monitoring device, wherein the double product equivalent amount,
Calculating a predicted value by predictive calculation based on the calculated value of the total systolic displacement or the total diastolic displacement or a combination thereof, and using a continuous transition characteristic of the predicted value as a basis for providing the information at a predetermined time. It is characterized by. With this, it is possible to recognize in advance the reserve of the heart after a predetermined time has elapsed or after a predetermined amount of exercise, to know the real time of the optimal amount of exercise, etc., and to determine the reserve of the heart based on the continuous transition characteristic of the predicted value. Since the force is determined, more diversified and accurate determination of the cardiac reserve can be made. In addition, the above information provision,
For example, a warning, a warning display, a warning such as a warning vibration, a display of real time until the optimal exercise amount, a sound, and the like are given.

Further, in the heart function monitoring apparatus according to the present invention, in the heart function monitoring apparatus, an ultrasonic sensor is used as the measuring means, and ultrasonic waves of the ultrasonic sensor are irradiated perpendicularly to a blood vessel wall. It is characterized by. By irradiating the ultrasonic irradiation of the ultrasonic sensor perpendicularly to the blood vessel wall, the accuracy of the acquired blood vessel wall displacement is dramatically improved.

Further, the heart function monitoring apparatus of the present invention is characterized in that in the above-mentioned heart function monitoring apparatus, a band is provided, and the measuring means is provided on the band so as to be adjustable in position. The band and the measuring means provided so that the position can be adjusted can always be used by being worn on a wrist or the like, and the measuring means can be adjusted to an accurate position for measuring a blood vessel wall displacement.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a heart function monitoring apparatus according to the present invention. Figure 1
1 is a front view showing an embodiment of the heart function monitoring device of the present invention.

The heart function monitoring apparatus 1 shown in FIG. 1 is of a type which is carried on a wrist and carried by a CPU, which functions as an arithmetic means and a control means, a memory which is a storage means, a time measuring means and the like. A processing unit 2, a display unit 3 such as a liquid crystal display screen provided above the processing unit 2, and a power supply unit 4 for operating and stopping the heart function monitoring device 1. A sensor unit 6 serving as a measuring unit is provided. A band 7 to be worn on the wrist is attached below the processing unit 2, and a sensor 6 is attached to the band 7 so as to be slidable to an optimum position so that the position can be adjusted. Is provided with a warning unit 8. 9 is a superficial blood vessel of the wrist.

The sensor section 6 is a section for non-invasively and continuously measuring a measurement value caused by the displacement of the blood vessel wall, and can use a piezoelectric vibration conversion element or the like. A conversion element is used. The sensor unit 6 by the ultrasonic conversion element irradiates the superficial blood vessel wall with ultrasonic waves, and measures the Doppler shift frequency between the transmitted ultrasonic waves and the reflected waves based on the ultrasonic Doppler method. In order to ensure the accuracy of the value, the transmitted ultrasonic wave is irradiated perpendicularly to the superficial blood vessel wall and measured, but the present invention also includes a method capable of performing accurate measurement other than perpendicular irradiation. In addition, if an ultrasonic transducer is used in the sensor unit, power consumption can be reduced, and by using ultrasonic waves, not only superficial blood vessels but also blood vessels in deep parts of the body can be measured. Can be increased, which is also preferable for such a reason.

The sensor unit 6 includes, in addition to the ultrasonic transducer,
Any device can be used as long as it can acquire the pressure pulse wave shape. For example, a semiconductor strain gauge, a pressure-sensitive diode, or the like can be appropriately used as the piezoelectric vibration conversion element. Instead of using a piezoelectric vibration conversion element or the like, it is also possible to adopt an air volume conversion method using a pressure-sensitive sensor.

From the measured value of the Doppler shift frequency detected and measured by the sensor unit 6 having the ultrasonic transducer,
By setting a theoretical formula in the memory of the processing unit 2 and calculating by the CPU, the displacement velocity of the blood vessel wall is continuously calculated and obtained. The theoretical formula by the ultrasonic Doppler method is as the following formula (1). F1: frequency of transmitted ultrasonic wave, f2: frequency of reflected wave, Δf: Doppler shift frequency detected from transmitted ultrasonic wave and reflected wave, V: moving speed (displacement speed) of blood vessel wall, C: ultrasonic wave Is the incident angle between the ultrasonic beam and the displacement direction of the blood vessel wall.

Δf = f1−f2 = 2Vcosθ / C
(1) When the ultrasonic beam is irradiated perpendicularly to the blood vessel wall, cos θ becomes 1 at θ = 0 °, so the above theoretical expression (1) is expressed as the following expression (2).

Δf = f1−f2 = 2V / C
.. (2) further integrating the displacement velocity of the blood vessel wall obtained continuously to calculate and obtain the blood vessel wall displacement continuously;
If necessary, a displacement curve which is an analog waveform of a blood vessel wall displacement is obtained from a continuously calculated value of the blood vessel wall displacement. The displacement curve has the same tendency as the intravascular pressure pulse wave shape. FIG. 2 shows the displacement curve obtained in this embodiment. In FIG. 2, the horizontal axis represents time, and the vertical axis represents the displacement of the blood vessel wall.

From the continuous calculated value of the vascular wall displacement or the vascular wall displacement curve representing the arterial pressure pulse waveform, for example, the heart rate (pulse rate) per minute, the maximum displacement of the vascular wall in the systole, The average value of the systolic peak displacement of the vascular wall, the median of the systolic peak displacement of the vascular wall, the systolic displacement speed of the vascular wall, the total systolic displacement of the vascular wall, the total diastolic displacement of the vascular wall, the blood vessel The total displacement of the wall and the total diastolic time of the blood vessel wall can be recognized or calculated and obtained by the CPU as needed.

Then, a processing parameter value capable of recognizing the state of the cardiac reserve is calculated and obtained based on the blood vessel wall displacement curve. For example, in the present embodiment, a method is used in which a displacement corresponding to the systolic blood pressure is multiplied by a heart rate to calculate and acquire a double product equivalent amount for the heart rate. The maximum displacement h in the systole corresponding to the systolic blood pressure in the blood vessel, the average value of the peak displacement of the systole of the blood vessel wall, or the median m of the peak displacement of the systole of the blood vessel wall is adopted.

Here, the double product is an index of heart function, which is an amount represented by heart rate × systolic blood pressure. The double product equivalent amount in the present invention is obtained by multiplying the displacement corresponding to the systolic blood pressure by the heart rate. Is what you want. This is because the pressure pulse waveform in this embodiment is acquired as a displacement curve, and the difference between the part corresponding to the systolic blood pressure (systolic blood pressure) and the part corresponding to the diastolic blood pressure (diastolic blood pressure) is defined as the systolic blood pressure. The corresponding displacement is indicated or calculated. Since both the systolic blood pressure and the diastolic blood pressure change depending on the blood pressure, the displacement amount also changes. For example, the systolic maximum displacement amount corresponding to the systolic blood pressure in one minute, or the systolic peak displacement amount of the vascular wall. Since the average value, or the median value of the amount of systolic peak displacement of the blood vessel wall is equivalent to the systolic blood pressure value,
Even if this is multiplied by the heart rate instead of the systolic blood pressure value, it is possible to approximately recognize the heart reserve and the heart function reserve. Is what you want.

Further, regarding the systole, the processing parameter values which can be obtained based on the vascular wall displacement curve and which can recognize the state of the cardiac reserve include, in addition to the double product equivalent, the total systolic displacement and the differential of the rise of the systole. Values and the like can also be used, and these processing parameter values can be appropriately selected as needed, or can be calculated, acquired, and used in combination with necessary ones.

Regarding the diastole, processing parameter values that can recognize the state of cardiac reserve obtained based on the vascular wall displacement curve include, for example, total diastolic displacement. The total diastolic displacement during the total diastolic time is approximately correlated with coronary blood flow because coronary blood flow flows during diastole, and the change in total diastolic displacement is approximately correlated with coronary blood flow change. Therefore, the total diastolic displacement is an important index for judging cardiac reserve and functional reserve.

In this embodiment, both the above-mentioned double product equivalent amount and total diastolic displacement are obtained in order to increase the accuracy of recognition of cardiac reserve and cardiac functional reserve. The total amount of the diastolic displacement is, for example, an average value obtained by adding the total amount of the diastolic displacement of all the diastolic times in one minute and dividing the sum by the heart rate in the one minute, or the heart rate in the one minute. The median number, or the total diastolic displacement, which is the maximum in the heart rate for one minute, is used. Note that other processing parameter values can be used as appropriate. For example, two combinations of a double product equivalent amount and a total diastolic displacement, or two combinations of a total diastolic displacement and a total systolic displacement are used. It is also possible to determine the cardiac reserve by using one of the equivalent amounts of the double product, the total amount of the systolic displacement, and the total amount of the diastolic displacement.

In the present embodiment, the standard range of the double product equivalent amount preset in the memory is compared with the acquired double product equivalent amount. In the case where one of the double product equivalent amount or the diastolic displacement amount is out of the standard range, a preliminary warning such as an alarm, vibration, lighting or the like in the warning unit 8 is performed. When both the double product equivalent amount and the total amount of diastolic displacement are out of the standard range, a warning or a predetermined display is performed in the warning unit 8 so that the user recognizes excessive movement and the like. A configuration that can be used. In addition, it is also possible to adopt a configuration in which a warning is directly issued by the warning unit 8 when any one of the double product equivalent amount or the total diastolic displacement is out of the standard range. Even when a processing parameter value is adopted, a warning is issued by comparing one or more processing parameter values with a standard range.

The index of the double product equivalent, the total diastolic displacement, or the total systolic displacement varies depending on the individual, although the reference value and the range of variation vary from individual to individual. The standard initially increases with an increase in the heart rate due to the addition of exercise, then reaches a plateau when the heart rate further increases, and then tends to decrease. The equivalent amount of double product and the total amount of systolic displacement increase within the corresponding range of the cardiac reserve, and tend to decrease outside the corresponding range. Becomes The timing at which the total diastolic displacement also decreases from the plateau serves as a guide for determining the corresponding range of the cardiac reserve. The tendency of the change is the same not only in healthy subjects but also in cardiac dysfunction subjects.

The graphs of FIGS. 3 and 4 of this embodiment show the double product equivalent and the total diastolic displacement, respectively. The horizontal axis represents the heart rate, the vertical axis represents the double product equivalent, and the total diastolic displacement. is there. In the case of patients with cardiac dysfunction, both the double product equivalent and total diastolic displacement are located at the lower left or below, with the double product equivalent coming early on the plateau and the total diastolic displacement dropping to the right early. In the case of a healthy subject, the double product equivalent and the total diastolic displacement are both located at the upper right or above according to the curves, and the double product equivalent arrives at the plateau late,
The total amount of diastolic displacement falls to the right at a late stage.

Based on the above tendency, it is possible to preset a standard range for double product equivalent or double product, total diastolic displacement, etc. based on statistics, past data, and the like. 3 shows the standard range set for a standard healthy subject and the standard range set for a standard cardiac dysfunction with respect to double product equivalent and total diastolic displacement. Shown in the range.
These standard ranges are not limited to the above-described settings, and various settings such as age, gender, purpose, and the like can be set, and a configuration in which these are selected and used is also possible. Similarly, a standard range such as the total systolic displacement can be set.

Further, based on statistics and past data, etc., the obtained predicted values such as the double product equivalent, the total diastolic displacement or the total systolic displacement are obtained from the obtained curve transition such as the equivalent double product or the total diastolic displacement. And it is possible to predict the transition of the curve, the double product equivalent amount obtained in the prediction operation, total diastolic displacement,
It is determined that the predicted value of the total systolic displacement or the shift of these predicted curves is within the standard range or out of the standard range, and based on the fact that the predicted value is out of the standard range, information such as a warning or display is displayed at a predetermined time. It is also preferable to provide. At the predetermined time, for example, a suitable timing such as a time when a predetermined time has elapsed from a time when the value falls outside the standard range or a time when it is predicted that the value falls outside the standard range is included. The information includes an optimum amount of exercise calculated by the unit 2 based on the data and the like and a display of the real time thereof.

The continuous predicted values of the double product equivalent amount, the total systolic displacement amount, and the total diastolic displacement amount obtained by the above-described prediction calculation or the prediction curves thereof exceed the allowable range of the cardiac reserve due to excessive exercise load. Since it becomes a shape having the above-mentioned transition characteristics such as lowering, for example, the cardiac reserve from the timing when the plateau of the predicted curve of the equivalent amount of double product or the total amount of systolic displacement or the prediction curve of the total amount of diastolic displacement decreases. It is also preferable to make the determination and provide the information at a predetermined time.

As a further criterion indicating the limit of the cardiac reserve by the double product equivalent, the total systolic displacement, and the total diastolic displacement, for example, the intersection with the dash-dot line in the solid line of the double product equivalent in FIG. Or a plateau at a predetermined angle that intersects with the dash-dot line in the solid line of the total diastolic displacement in FIG. It is preferable to adopt a configuration in which a standard range is determined and the cardiac reserve is determined in the standard range.

In order to provide the information at the predetermined time, the processing unit 2
Display and update the real time of the optimal momentum predicted and calculated based on the data etc. at any time, give a warning etc. at a point in time which goes back out of the standard range and a predetermined time, increase the equivalent amount of double product by prediction calculation The warning and the required display are performed with the optimal predicted value from the point where the temperature changes to the point where the temperature changes to the descent.

In this embodiment, the values measured by the sensor unit 6 and the processing unit, such as the vascular wall displacement, the displacement curve indicating the arterial pressure pulse waveform, the double product equivalent, the total diastolic displacement, the total systolic displacement, and the like, are used. 2, and all or necessary items can be selected and recorded in a memory built in the processing unit 2 for a predetermined measurement time or the like. If necessary, the data in the memory can be stored in the memory. External use is possible. It is more preferable that the data stored in the built-in memory is configured to be retrievable to the outside through an external output terminal, and processed into various indicators in a circulatory physiology so that it can be used for health condition evaluation.

Although the heart function monitoring device 1 has been described as being worn on the wrist, it is not limited to this.
It can be used at any suitable location such as the chest or arm. Note that it is preferable that the measurement site be closer to the heart because the accuracy of information relating to cardiac reserve increases. In addition, the heart function monitoring device 1 is small, lightweight, unrestricted, can be made almost the size of a wristwatch, can be easily attached to a wrist, etc., and can be configured to be used underwater with a waterproof structure or the like. It is.

The cardiac function monitoring device 1 non-invasively and continuously obtains the arterial pressure pulse waveform including a large amount of cardiac function information to determine the subject's cardiac reserve, and evaluates the double product equivalent volume and diastolic phase. The total displacement, the total systolic displacement, the optimal momentum, and the like can be displayed or selectively displayed on the display unit 3, and a warning or the like is issued when exceeding the reserve function of the heart function during exercise or the like. Therefore, it is possible to prevent the subject from excessive exercise and the like, and to check the health condition during exercise.

[0044]

Since the heart function monitoring apparatus of the present invention has the above-described configuration, the heart reserve of a subject or the like during exercise is non-invasively and continuously accurately recognized to monitor the reserve of the heart. This has the effect of managing the subject's good health.

Further, the heart function monitoring apparatus of the present invention comprises a chest, an arm,
It can be easily worn on a wrist or the like, is lightweight, does not impose a burden on the subject who wears it, and is unrestricted.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a heart function monitoring device of the present invention.

FIG. 2 is a graph showing a displacement curve of a blood vessel wall.

FIG. 3 is an explanatory view showing a display screen on which a curve corresponding to a product is displayed.

FIG. 4 is an explanatory diagram showing a display screen on which a curve of total diastolic displacement is displayed.

[Explanation of symbols]

 Reference Signs List 1 heart function monitoring device 2 processing unit 3 display unit 4 power supply unit 5 code 6 sensor unit 7 band 8 warning unit 9 superficial blood vessel

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kohagi Yamashita 8-4-14, 80,000 Sagami-Ono, Sagamihara-shi, Kanagawa Building 701 F-term (reference) 4C017 AA02 AA08 AA09 AB02 AC03 AC20 AC23 BD01 EE01 FF05 4C301 DD02 DD06 DD10 EE20

Claims (10)

[Claims] 1. A portable device having at least a measuring unit, a calculating unit, a controlling unit, a storing unit, and an information providing unit, which continuously measures a measurement value caused by a displacement of a blood vessel wall, and calculates a blood vessel from the measurement value. Calculate the wall displacement, calculate a predetermined parameter value capable of recognizing cardiac reserve based on the continuous calculation value of the blood vessel wall displacement, determine whether the predetermined parameter value is within a set standard range, A cardiac function monitoring device for providing information based on a predetermined parameter value falling outside the standard range. 2. The method according to claim 1, wherein the predetermined parameter value is one of a double product equivalent, a total systolic displacement, and a total diastolic displacement calculated by multiplying a heart rate by a systolic equivalent displacement. The heart function monitoring device according to claim 1. 3. The method according to claim 2, wherein the predetermined parameter value is any one of a double product equivalent, a total systolic displacement, and a total diastolic displacement calculated by multiplying a heart rate by a systolic equivalent displacement. The heart function monitoring device according to claim 1. 4. The system according to claim 3, wherein the predetermined parameter values are three of a double product equivalent, a total systolic displacement, and a total diastolic displacement calculated by multiplying the heart rate by the systolic equivalent displacement. 2. The cardiac function monitoring device according to 1. 5. Providing preliminary information based on one of the predetermined parameter values falling outside the standard range, and providing the information based on two predetermined parameter values falling outside the standard range. The heart function monitoring device according to claim 3 or 4, wherein: 6. Providing preliminary information based on two of the predetermined parameter values falling outside the standard range, and providing the information based on three predetermined parameter values falling outside the standard range. 5. The heart function monitoring device according to claim 4, wherein: 7. A standard value in which a predicted value by a prediction calculation is calculated based on a calculated value of the double product equivalent amount, the systolic displacement total amount, the diastolic displacement total amount, or a combination thereof, and the predicted value is set. And determining whether the predicted value is out of a standard range as a basis for providing the information at a predetermined time.
7. The cardiac function monitoring device according to 4, 5, or 6. 8. A predicted value by a prediction calculation is calculated based on a calculated value of the double product equivalent amount, the systolic displacement total amount, the diastolic displacement total amount, or a combination thereof, and continuously calculates a transition characteristic of the predicted value. 4. The method according to claim 2, wherein said information is provided at a predetermined time.
The cardiac function monitoring device according to 4, 5, 6, or 7. 9. The method according to claim 1, wherein an ultrasonic sensor is used as said measuring means, and ultrasonic waves of said ultrasonic sensor are irradiated perpendicularly to a blood vessel wall.
9. The cardiac function monitoring device according to 6, 7, or 8. 10. The apparatus according to claim 1, further comprising a band, wherein said measuring means is provided on said band so as to be adjustable in position. Heart function monitoring device.