JP2020018542A - Blood pressure measurement device, method and program - Google Patents

Abstract

To obtain an accurate blood pressure value when a user is in any posture, and present an obtained blood pressure value with reliability.SOLUTION: A blood pressure measurement device has an acquisition unit that acquires a first blood pressure value of a user, a computing unit that calculates a blood pressure measurement state of the user, and a presentation unit that presents the blood pressure measurement state and the first blood pressure value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a blood pressure measurement device, a method, and a program.

  When measuring the blood pressure of a user, it is common to mount the device on a specific part of a living body and measure it. For example, a cuff-type blood pressure measurement device measures a user's blood pressure by attaching a cuff to the upper arm of a user and injecting or discharging fluid from the cuff. Another example is a blood pressure measurement device in which a wristwatch is worn on a user's wrist and a user's blood pressure is measured by a device (for example, a cuff or an electrode) built in the wristwatch or belt.

  When measuring blood pressure in this way, it is important to appropriately adjust the height of the mounting position of the living body. Depending on the difference between the height of the heart and the height of the measurement position, a difference occurs in a pressure (for example, represented by a water head pressure) generated by gravity of blood in a blood vessel from the heart to the measurement position. As a result, when the height of the measurement position is lower than the height of the heart, the blood pressure is measured in a state where the pressure from the heart to the measurement position due to the blood pressure applied thereto is applied. On the other hand, when the height of the measurement position is higher than the height of the heart, the blood pressure is measured in a state where the pressure due to gravity applied to the blood from the measurement position to the heart is reduced. That is, it is important to match the height between the position of the heart and the position of the living body for measuring the blood pressure as a condition for ensuring the accuracy of measuring the blood pressure.

As a blood pressure measurement device for accurately measuring a user's blood pressure, for example, Patent Literature 1 discloses a method based on a head pressure.
In Patent Literature 1, the pressure in the inner cuff is a pressure in which the water head pressure between the heart and the measurement site is increased, but the pressure detected by the pressure detector is between the pressure detector and the inner cuff. , The head pressures of both sides cancel each other, and a true blood pressure value is detected. As a result, according to Patent Literature 1, the head pressure is corrected by holding the pressure detection unit at the height of the heart in advance in addition to the normal blood pressure measurement method.

JP-A-7-136133

  However, the blood pressure measurement device described in Patent Literature 1 maintains the pressure detection unit at substantially the same height as the height of the subject's heart, and starts measurement by attaching the inner and outer cuffs to, for example, the index finger. There is only a statement. Patent Document 1 does not describe how to maintain the height of the pressure detection unit and the height of the heart at the same level. In order to maintain the same height in Patent Literature 1, it is necessary for the user to adjust (move up and down) the pressure detection unit that detects the internal pressure applied to the cuff.

  In addition, in order to be able to measure the blood pressure (here, the blood pressure value may be simply referred to as blood pressure) at any time, the blood pressure can be measured without the user being aware of the posture at the time of measurement. Is desirable. When measuring blood pressure in various postures, not only the height of the pressure detector and the height of the heart, but also the degree to which blood vessels are easily compressed depending on the posture, and the influence of postures such as the ease of blood flow depending on the posture Therefore, it is necessary to correct the blood pressure corresponding to the height of the heart including these factors.

  However, in order that the user can easily measure the blood pressure at any time, it is necessary that the user can measure the posture without being conscious of the posture at the time of measurement. When blood pressure is measured in various postures, not only the height but also the posture such as (1) the posture in which blood vessels are easily compressed and (2) the difference in the ease of blood flow depending on the posture are affected. It is necessary to estimate the original blood pressure of the user by correcting the measured blood pressure to a blood pressure corresponding to the height of the heart (blood pressure of the upper arm).

  Also, the blood pressure fluctuates due to various factors, and it is determined that it is unknown whether the cause is a fluctuation of the original blood pressure of the user or a change in the posture of the user and / or the height of the blood pressure sensor. The reliability of the blood pressure data acquired in such a manner is reduced, and its importance is reduced.

  The present invention has been made in view of the above circumstances, and its purpose is to obtain an accurate blood pressure value when a user is in an arbitrary posture and to present the reliability of the obtained blood pressure value. It is to provide a possible blood pressure measuring device, method and program.

  The present disclosure employs the following configurations in order to solve the above-described problem.

  That is, a blood pressure measurement device according to a first aspect of the present disclosure includes an acquisition unit that acquires a first blood pressure value of a user, a calculation unit that calculates a blood pressure measurement state of the user, the blood pressure measurement state, A blood pressure value;

  With the above configuration, the blood pressure measurement device can obtain the user's blood pressure measurement state when acquiring the user's first blood pressure value. Further, the presenting unit presents the blood pressure measurement state and the measured first blood pressure value, thereby determining whether the measured first blood pressure value is the original blood pressure value of the user depending on the blood pressure measurement state. Can be determined by browsing the content presented by the presentation unit. In other words, the reliability of the first blood pressure value measured at that time can be determined (or estimated) based on the blood pressure measurement state.

  Here, the blood pressure measurement state is a state including all the elements related to the blood pressure when measuring the blood pressure of the user. The blood pressure measurement state is, for example, the posture information of the user, the blood pressure of the user, the height of the blood pressure sensor based on the heart, and the like. In addition, the posture information of the user may include all information regarding the posture of the user, for example, whether the user is in a standing position, a sitting position, or a lying position, and furthermore, a supine position or a prone position among the lying positions. The information includes whether the patient is in the right supine position or the left supine position. Further, the posture information of the user includes posture angles, accelerations, magnetic fields, angular velocities, heights detected by sensors attached to the body parts of the user, and physical characteristics of the user (for example, upper arm, front bowl length, body length). Information such as trunk width and chest width) is included. The attitude angle is an angle expressing a three-dimensional attitude at that position, and is, for example, a Euler angle, or a roll angle, a pitch angle, and a yaw angle often used in expressing one of the Euler angles. There are pairs.

  The blood pressure measurement device according to the second aspect determines whether the first blood pressure value needs to be corrected based on the blood pressure measurement state, and determines that the first blood pressure value needs to be corrected. In the case where the first blood pressure value is corrected, the correction unit that corrects the first blood pressure value is further provided, and the presenting unit simultaneously displays the blood pressure measurement state, the corrected first blood pressure value, and the uncorrected first blood pressure value. Present.

  In the above configuration, when the first blood pressure value needs to be corrected based on the blood pressure measurement state, the blood pressure measurement device can obtain a blood pressure value corrected from the first blood pressure value. As a result, the blood pressure measurement device can obtain a blood pressure value before correction and a blood pressure value after correction. Then, the blood pressure measurement device presents the blood pressure measurement state together with both the blood pressure value before correction and the blood pressure value after correction. Therefore, the user can simultaneously refer to the blood pressure value after the correction, the blood pressure value before the correction, and the blood pressure measurement state of the user, so that the blood pressure value changed before and after the correction is the blood pressure measurement state of the user. Can be determined. The blood pressure measurement device, for example, corrects only the height based on the posture information of the user, or corrects the measured blood pressure by a formula that further corrects the height correction formula according to the posture information of the user, and corrects the measured blood pressure. Blood pressure can be obtained.

  If the blood pressure value fluctuates before and after the correction and the blood pressure measurement state of the user does not change, the user can determine that the fluctuation of the blood pressure value is a fluctuation of the original blood pressure of the user. Further, by referring to the user's blood pressure measurement state, it is possible to know in what state the blood pressure value was measured. It is known that the blood pressure measurement value strongly depends on the measurement state even if the original blood pressure does not fluctuate depending on the measurement state. Therefore, the user can confirm the reliability of the blood pressure value of the measurement result by referring to the blood pressure measurement state. For this reason, it can be said that the blood pressure measurement state of the user indicates the reliability of the blood pressure measured at that time.

  Further, according to the blood pressure measurement device of this aspect, it is possible to determine whether or not there is a portion where the blood pressure value is high even if the first blood pressure value is corrected. For this reason, for example, when there is a portion where blood pressure sharply rises after correcting for height and posture, it is determined that there is a high possibility that a serious phenomenon has occurred for the user's body. it can.

  In the blood pressure measurement device according to the third aspect, the blood pressure measurement state includes posture information of the user, a difference in height between a first blood pressure sensor that detects the blood pressure of the user, and the heart of the user, including.

  In the above configuration, since the blood pressure measurement state includes the posture information of the user and the difference in height between the first blood pressure sensor and the heart of the user, the correction unit determines the posture information of the user and the first blood pressure sensor. Determining how to correct the blood pressure measurement value measured by the first blood pressure sensor from a difference between the user's heart and the height (for example, the height of the first blood pressure sensor with respect to the heart). Can be. The blood pressure measurement device, for example, corrects only the height based on the posture information of the user, or corrects the measured blood pressure by a formula that further corrects the height correction formula according to the posture information of the user, and corrects the measured blood pressure. Blood pressure can be obtained.

  In the above configuration, the calculation unit may determine how to correct the blood pressure detected by the first blood pressure sensor based on the posture information of the user and a difference in height between the first blood pressure sensor and the heart. Information can be obtained.

  In the blood pressure measurement device according to the fourth aspect, a calculation unit that calculates a difference in height between the first blood pressure sensor that detects the blood pressure of the user and the heart of the user as a blood pressure measurement state; The present invention further includes a presentation unit that presents the first blood pressure value acquired when the difference is larger than a certain range and the first blood pressure value acquired when the difference is within the range, in a different manner.

  In the above configuration, when the first blood pressure value of the user is acquired, the blood pressure measurement device calculates a difference in height between the first blood pressure sensor that detects the blood pressure of the user and the heart of the user as a blood pressure measurement state. Obtainable. Then, the presenting unit presents the blood pressure measurement state including the height difference between the first blood pressure sensor and the user's heart and the measured first blood pressure value, so that the measured first blood pressure value is: The viewer can determine whether or not the blood pressure value is the original blood pressure value of the user depending on the blood pressure measurement state including the height difference by browsing the content presented by the presentation unit. In other words, the viewer can determine (or estimate) the reliability of the first blood pressure value measured at that time based on the blood pressure measurement state.

  In the blood pressure measurement device according to the fifth aspect, the presentation unit presents the first blood pressure value in a different color depending on whether the display is within the range, and / or is within the range. A different flag is added depending on whether or not it is presented.

  In the above configuration, the presentation unit of the blood pressure measurement device is displayed based on whether a height difference between the first blood pressure sensor that detects the user's blood pressure and the user's heart is within a predetermined range. By changing the color of the first blood pressure value, the viewer can determine at a glance whether the displayed blood pressure value is measured under good conditions in terms of height. . Similarly, a flag may be added to the displayed first blood pressure value instead of or in addition to the color. The flag is changed depending on whether or not the difference between the height of the first blood pressure sensor for detecting the blood pressure of the user and the height of the heart of the user is within a predetermined range. As a result, at first glance, the viewer can determine whether or not the displayed blood pressure value is measured under favorable conditions in terms of height.

  In the blood pressure measurement device according to the sixth aspect, a calculation unit that calculates a difference in height between the first blood pressure sensor that detects the blood pressure of the user and the heart of the user as a blood pressure measurement state, A presentation unit that presents only the acquired first blood pressure value when the difference is within a certain range.

  In the above configuration, when the first blood pressure value of the user is acquired, the blood pressure measurement device calculates a difference in height between the first blood pressure sensor that detects the blood pressure of the user and the heart of the user as a blood pressure measurement state. Obtainable. The presenting unit monitors a blood pressure measurement state including a height difference between the first blood pressure sensor and the user's heart, and presents a first blood pressure value corresponding to a case where the height difference is within a certain range. By doing so, the viewer who has viewed the presented content can determine whether or not the blood pressure value is the original blood pressure value of the user by browsing the content presented by the presenting unit. In other words, a viewer who has viewed the presented content can estimate that the presented blood pressure value has high reliability or can recognize that the blood pressure value has high reliability.

  In the blood pressure measurement device according to the seventh aspect, a calculation unit that calculates the posture information of the user as a blood pressure measurement state, and the posture information when the first blood pressure value is detected together with the first blood pressure value And a presenting unit for presenting the information.

  With the above configuration, the blood pressure measurement device can obtain the posture information of the user as the blood pressure measurement state when the first blood pressure value of the user is obtained. Furthermore, the presenting unit presents the blood pressure measurement state including the posture information of the user and the measured first blood pressure value, so that the measured first blood pressure value depends on the blood pressure measurement state and the user's original blood pressure measurement state The viewer who browses the content presented by the presentation unit can determine whether or not the blood pressure value is present. In other words, the viewer can determine (or estimate) the reliability of the measured first blood pressure value at that time based on the blood pressure measurement state including the posture information of the user.

  In the blood pressure measurement device according to the eighth aspect, the presentation unit presents a blood pressure value for each posture of the user based on the posture information.

  In the above configuration, based on the posture information of the user, by presenting the blood pressure value at that time for each posture of the user, the viewer browsing the content presented by the presentation unit can obtain the blood pressure value for each posture of the user. The distribution can be grasped at a glance. As a result, the viewer who browses the content presented by the presentation unit can determine whether the measured first blood pressure value is the original blood pressure value of the user depending on the posture of the user. In other words, the viewer can determine (or estimate) the reliability of the first blood pressure value measured at that time for each posture of the user.

  In the blood pressure measurement device according to another aspect described above, the blood pressure measurement device further includes a calculation unit that calculates reliability of the corrected first blood pressure value based on the blood pressure measurement state, and the presentation unit corresponds to the first blood pressure value. The reliability is displayed.

In the above configuration, the blood pressure measurement device can know in which state the first blood pressure value corrected based on the blood pressure measurement state has been corrected. Therefore, which item (for example, the height or the joint is bent in the blood pressure measurement state) can be determined. , Standing position, sitting position, or lying position) based on the correction (what correction formula was used) (for example, since the height is high, only the blood pressure corresponding to the height) Correct blood pressure higher). The reliability of the measured value refers to the reliability of the correction. For example, the higher the reliability of the measured value, the higher the reliability of the correction.
Further, the calculation unit can determine whether the posture is a posture for compressing a blood vessel or a posture for changing a blood flow rate, based on the posture information of the user. Then, the calculation unit can correct the measured value of the blood pressure detected by the first blood pressure sensor based on the determination.

  The highly reliable blood pressure is a measured value when the user stays in a resting state for a while and measures the blood pressure by placing the blood pressure sensor at the height of the heart. In this case, the blood pressure measurement device does not need to make any correction. Therefore, when the correction is not required, the reliability is higher than when the correction is required.

  Since the blood pressure measurement device displays the measurement state in accordance with the blood pressure value, the user can determine which blood pressure value is reliable. Also, when a doctor views this blood pressure measurement result, it is easy to determine whether or not the blood pressure value is reliable, which is likely to be useful for making an accurate diagnosis.

  Based on the posture information of the user, the calculation unit can determine whether the posture is a posture for compressing a blood vessel or a posture for changing a blood flow. Then, the calculation unit can correct the measured value of the blood pressure detected by the first blood pressure sensor based on the determination.

  In the blood pressure measurement device according to the ninth aspect, the calculation unit acquires the blood pressure measurement state from sensor information from one or more sensors worn by the user.

  In the above configuration, the blood pressure measurement state of the body part to which the sensor is attached can be acquired based on sensor information from a sensor attached to one or more of the user's body parts. Here, the sensor information may be any information as long as the information is measured by the sensor. For example, the calculation unit can calculate the posture angle of the body part worn and acquire the posture state of the user. Here, the attitude angle is an angle expressing a three-dimensional attitude at that position, and is, for example, a Euler angle or a roll angle, a pitch angle, and a yaw angle often used in one expression of the Euler angle. And so on. Further, it is desirable that the sensor is mounted in a place where the position does not shift with respect to the body of the user.

  In the blood pressure measurement device according to the tenth aspect, the correction unit includes information at bedtime and other than at bedtime, and includes information on a supine position, a prone position, and a lateral position at bedtime. Corrects the first blood pressure value based on the blood pressure measurement state including the information on the standing position and the sitting position.

  In the above configuration, the correction unit changes the correction expression as a blood pressure measurement state depending on whether the patient is sleeping (whether in a supine position), and further determines whether the subject is in a supine position, a prone position, or a lateral position during bedtime. The information is corrected based on the blood pressure. In addition, except for going to bed, the correction unit corrects the blood pressure based on the information on the standing position and the sitting position.

  Therefore, the correction unit can correspond to a more detailed correction expression according to the change in the user's posture based on the user's posture information. As a result, the first blood pressure value can be corrected based on whether the user is in the standing, sitting, or lying position.

  In the blood pressure measurement device according to the eleventh aspect, the correction unit may determine whether the user is in a standing position, a sitting position, or a lying position, and a first blood pressure sensor that detects the user's blood pressure and a heart. The first blood pressure sensor and a difference in height between the first blood pressure sensor and the user's heart determined from the posture information including the posture of the user's body part and the state in which the joint between them is bent; The first blood pressure value is corrected based on a correction formula.

  In the above configuration, the correction unit also considers the state of the posture of the user and whether the joint between the sensor for measuring blood pressure and the heart is bent. Depending on the state of the user's posture, i.e., whether standing, sitting or lying down, the degree of load on the user's heart and the energy load required for the heart to send blood throughout the body change. The state of the posture affects the original blood pressure of the user. Also, if the joint between the blood pressure sensor and the heart is bent, the physical structure of the blood vessels will be affected. That is, when the joint is bent, the blood vessel may be compressed by the muscle and / or the bone and the blood flow may be difficult to flow. For these reasons, even if the blood pressure detected by the blood pressure sensor is the same, there is a high possibility that the original blood pressure value of the user changes depending on the posture state and the presence or absence of bending of the joint. According to the above configuration, it is possible to provide a blood pressure measurement device that can correct the detected blood pressure and more accurately measure the original blood pressure based on the posture state of the user and the presence or absence of bending of the joint. become.

  In the blood pressure measurement device according to the twelfth aspect, the correction unit determines whether correction is possible only with the difference based on the posture information. The first blood pressure value is corrected by a second correction formula corresponding to the information.

  In the above configuration, it is determined whether the detected blood pressure can be corrected based only on the difference between the height of the user's heart and the height of the first blood pressure sensor that detects the blood pressure, based on the posture information of the user. Thereafter, if it is determined that it is impossible to correct the blood pressure only by this difference, the measured blood pressure is corrected according to the correction formula corresponding to the posture information. For this reason, it is possible to correct the blood pressure based on the difference between the height of the heart and the height of the first blood pressure sensor (also simply referred to as height), or it is impossible to correct the blood pressure at this height. The blood pressure measurement value can be corrected by a correction formula corresponding to the posture of the user in consideration of the factors. Specifically, as a case where the measurement cannot be corrected based on the height of the heart and the blood pressure sensor, there is pressure on a blood vessel. In this case, the blood pressure measurement device can determine where the compression is caused by the user's posture, and thus can estimate a correction formula corresponding to the user's posture. Accordingly, the original blood pressure can be obtained.

  In the blood pressure measurement device according to the thirteenth aspect, in the case where correction is not possible only with the difference, the correction unit adds a correction value corresponding to the posture information to the first correction expression. The first blood pressure value is corrected by the equation.

  The above configuration is a more detailed limitation of the blood pressure measurement device according to the twelfth aspect, and more specifically defines a correction formula when correction is impossible only with the height of the heart and the blood pressure sensor. I have. In this aspect, a second correction formula obtained by adding a certain correction value to the first correction formula applied when correction is possible only by the height is used. Further, since the correction value is determined according to the posture of the user, the blood pressure measurement device can obtain the original blood pressure according to the posture of the user.

  In the blood pressure measurement device according to the fourteenth aspect, the second blood pressure sensor may detect a plurality of second blood pressure values at a position different from the first blood pressure sensor for detecting the blood pressure of the user and at the same height as the heart. A first blood pressure value is measured by the first blood pressure sensor while maintaining the second blood pressure sensor at the same height as the heart. A second measurement unit that measures at a first height that is a difference between the heights of the first blood pressure sensor and the second blood pressure sensor; and a third blood pressure value calculated from the first blood pressure value and the first height. If the second blood pressure value is equal to the second blood pressure value within the fluctuation range, it is determined that the correction is possible only with the height, and if the third blood pressure value is not equal to the second blood pressure value within the fluctuation range, the high blood pressure is corrected. A determination unit that determines that correction is impossible only with the height, and determines that correction is possible only with the height In this case, the first correction formula determined only by the height and the corresponding posture information are registered, and if it is determined that the correction cannot be performed only by the height, the fluctuation range is considered in the third blood pressure value. A registration unit configured to register a second correction expression obtained by adding a correction value calculated based on a difference between the calculated value and the second blood pressure value to the first correction expression, and corresponding posture information.

  With the above configuration, it is possible to set a value, a correction expression, and a determination condition regarding correction used in the blood pressure measurement device according to the first to thirteenth aspects. The user's blood pressure is measured a plurality of times by the second blood pressure sensor arranged at the same height as the heart, and a fluctuation range in which the user's original blood pressure fluctuates can be determined. It is desirable that the second blood pressure sensor attaches more importance to the blood pressure measurement accuracy than the first blood pressure sensor in comparison with the continuous measurement of blood pressure at the time of measurement and the convenience of measurement. Further, when measuring the blood pressure with the second blood pressure sensor, it is desirable to perform the measurement under an environment where the original blood pressure value can be measured and under the user's condition. Specifically, the second blood pressure sensor is measured according to the following conditions using an oscillometric device attached to an upper arm cuff that has been confirmed to have a difference from an auscultation method within 5 mmHg in a certain individual. Conditions: (1) Measurement environment: Quiet and appropriate room temperature environment, after sitting for 1-2 minutes without crossing legs in a chair with a backrest, no conversation environment, smoking, drinking, café before measurement Environment where the cuff position can be maintained at the height of the heart without taking in. (2) Measurement conditions: (2-1) Morning Within 1 hour after getting up, after urination, before taking medicine in the morning, before breakfast, sitting position After resting for 1-2 minutes, and (2-2) resting in a sitting position (before going to bed) for 1-2 minutes.

  A first blood pressure sensor having a height different from that of the second blood pressure sensor acquires a blood pressure value detected at the first height, and a value obtained by correcting the blood pressure value by the first height is within the fluctuation range calculated above. By determining whether or not there is, it is possible to determine whether or not the original blood pressure can be obtained by correcting the blood pressure detected by the first blood pressure sensor in this user's posture using only the height information.

  On the other hand, when the blood pressure detected by the first blood pressure sensor is not within the fluctuation range, it can be understood that it is impossible to correct the blood pressure using the correction formula based on only the height information. If the blood pressure cannot be corrected only by the height, the cause may be that the blood flow is affected by the deformation of the blood vessel due to the physical force acting on the blood vessel of the user. In this case, the blood pressure measurement device of the present aspect includes the following configuration in order to include an influence other than the height in the correction formula. The difference between the value including the fluctuation range in the first correction formula considering only the height and the blood pressure value detected by the second blood pressure sensor is determined, and the difference is added to the first correction formula by the user using the second correction formula. Is calculated. As described above, based on the posture of the user, the original blood pressure can be obtained by the first correction formula that corrects only by the height, and the original blood pressure can be obtained by the second correction formula that is applied when the correction cannot be performed only by the height. Can be registered in association with the user's posture. As a result, the user's original blood pressure can be obtained by correcting the blood pressure detected by the first blood pressure sensor from an arbitrary posture of the user using the optimum correction formula.

  In the blood pressure measurement device according to the fifteenth aspect, the second measurement unit, the determination unit, and the registration unit may determine a posture when a joint between the first blood pressure sensor and the heart is bent. The processing is executed in a posture where the joint between the first blood pressure sensor and the heart is not bent.

  In the above configuration, the blood pressure measurement device determines whether the joint between the first blood pressure sensor and the heart is bent, and in each case, the second measurement unit, the determination unit, and the registration unit Since the process is executed, a correction formula can be defined in accordance with the posture of each user both when the joint is not bent and when the joint is bent. As a result, it is possible to accurately measure the original blood pressure of the user when the user takes an arbitrary posture including the case where the user is bending the joint.

  In the blood pressure measurement device according to the sixteenth aspect, the registration unit includes information indicating whether the user is standing, sitting, or lying, and between the first blood pressure sensor and the heart. Information on whether a certain joint is bent and the posture angle of the body part of the user are included in the posture information and registered.

  In the above-described configuration, the posture information includes information on the state of the user (standing, sitting, or lying), whether or not the joint is bent, and the posture angle acquired by the sensor. It can be associated with a correction formula according to a change in the posture of the user. As a result, the user's original blood pressure can be accurately measured when the user takes an arbitrary posture, including whether the user is in a standing position, a sitting position, or a lying position, including when the user is bending a joint. It becomes possible to do. In addition, it is desirable that, among the states of the user, the supine position, the supine position, the prone position, the lower left lateral position, and the lower right lateral position be specified and registered. In the supine position, there is a high possibility that the height determination will be accurate based on such information.

  In the blood pressure measurement device according to yet another aspect, the first acquisition unit acquires the sensor information from the sensors attached to a wrist, an upper arm, and a trunk.

  In the above configuration, the sensors are mounted on the wrist, the upper arm, and the trunk, and the posture angle at each position can be obtained. Alternatively, for example, it may be possible to obtain the height of the heart with sensors mounted at these positions. In this case, the height based on the height of the heart can be calculated from the body measurement information and the posture angle of the user. Specifically, in the sitting position and the standing position, the height detected by the sensor mounted on the upper arm corresponds to the height of the heart. In the supine and prone positions, the midpoint of the chest (ie, chest width 板 2) corresponds to the height of the heart, so that half of the height detected by the sensor mounted on the trunk is the height of the heart. Corresponding to In the left and right lateral positions, the center of the trunk (trunk width 対 応 2) corresponds to the height of the heart, so half of the height detected by the sensor attached to the trunk is the height of the heart. Corresponding. On the other hand, when the sensor does not detect the height, the chest plate width, the trunk width, the length of the upper arm and the forearm, which are the body measurement information of the user, are measured in advance, and these values are used. This makes it possible to estimate the height of the sensor with reference to the heart.

  In the blood pressure measurement device according to the still another aspect, the posture angle includes a roll angle, a pitch angle, and a yaw angle obtained from an acceleration sensor, a gyro sensor, and a geomagnetic sensor.

  In the above configuration, the posture angle includes three angles from the acceleration sensor, the gyro sensor, and the geomagnetic sensor, a roll angle, a pitch angle, and a yaw angle, and the blood pressure measurement device uses these angles to determine the user's angle. The posture can be determined. The angle is not limited to this angle as long as the user's posture can be specified, and may be any angle as long as the user's posture in three-dimensional space can be uniquely determined.

  According to the present invention, it is possible to provide a blood pressure measurement device, a method, and a program capable of obtaining an accurate blood pressure value when a user is in an arbitrary posture and presenting the reliability of the obtained blood pressure value. .

The figure which illustrates typically an example of the outline | summary of the blood pressure measuring device which concerns on Embodiment. FIG. 1 is a diagram schematically illustrating an example of a hardware configuration of a blood pressure measurement device according to an embodiment. FIG. 3 is a diagram illustrating an example of a software configuration of the blood pressure measurement device according to the embodiment. The figure which illustrates typically an example of the processing procedure regarding the initial setting of the blood pressure measurement apparatus which concerns on embodiment. FIG. 4B is a diagram showing a continuation from No in step S409 in FIG. 4A. The figure which illustrates typically an example of the processing procedure regarding the blood pressure measurement of the blood pressure measurement apparatus which concerns on embodiment. The figure which illustrates typically an example of the processing procedure which selects the pattern which displays the measurement result of the blood pressure measurement apparatus which concerns on embodiment. FIG. 7 is a diagram illustrating an example of display of a result corresponding to (1) of FIG. 6. The figure which illustrates an example of the display of the result corresponding to (2) of FIG. The figure which illustrates an example of the display of the result corresponding to (3) of FIG. The figure which illustrates an example of the display of the result corresponding to (4) of FIG. The figure which illustrates an example of the display of the result corresponding to (5) of FIG.

  Hereinafter, an embodiment according to one aspect of the present invention (hereinafter, also referred to as “the present embodiment”) will be described with reference to the drawings. In the following embodiments, the same operation is performed for the parts with the same numbers, and the overlapping description will be omitted.

[Overview]
First, an outline of the present invention will be described with reference to FIG. FIG. 1 schematically illustrates an example of the outline of a blood pressure measurement device 100 according to the present embodiment. The blood pressure measurement device 100 is, for example, worn on the wrist of the user and receives sensor information from sensors 151 and 152 (one or more sensors worn by the user) that detect the posture and the like of the user. The sensor information includes a physical quantity detected at a position where the sensor is mounted for each sensor, and includes, for example, information on acceleration, angular velocity, geomagnetism, and blood pressure. The blood pressure measuring device 100 itself also operates as a sensor, and the sensor unit 101 has a blood pressure sensor (the sensor 152 corresponds to the “second blood pressure sensor” of the present invention), an acceleration sensor, and a gyro sensor, like the sensors 151 and 152. And / or a geomagnetic sensor. The sensor information acquisition unit 102 acquires the sensor information from the sensor unit 101 and the sensor information from the sensors 151 and 152.

  The posture calculation unit 103 calculates the posture information of the user based on the sensor information acquired from the sensor information acquisition unit 102. The user's posture information includes all information related to the user's posture, such as a posture angle (posture angle at the position of each sensor) based on information from the sensors 151 and 152, a blood pressure sensor (the “first blood pressure” of the present invention). Sensor ”; included in the blood pressure measurement device 100 in the present schematic example) and whether the joint existing between the heart and the heart is bent. The height calculator 104 calculates the difference between the height of the blood pressure measurement device 100 and the height of the user's heart based on the posture information of the user from the posture calculator 103 and the length of the body part to which each sensor is attached. calculate. The correction unit 105 acquires the user's posture information from the posture calculation unit 103, the height information from the height calculation unit 104, and the blood pressure measured from the blood pressure measurement unit 106, and obtains the blood pressure measured by the blood pressure measurement unit 106. Is corrected based on the posture information and the height information. The storage unit 107 stores the blood pressure corrected by the correction unit 105. The storage unit 107 stores, for example, a blood pressure value (also referred to as blood pressure value data) together with the measurement date and time.

  The presentation unit 108 receives the posture information of the user from the posture calculation unit 103, the height information from the height calculation unit 104, the corrected blood pressure value data obtained from the correction unit 105, The acquired blood pressure value data before correction is presented to a user or the like. All data presented by the presentation unit 108 may be stored in the storage unit 107, and the presentation unit 108 may receive data to be presented from the storage unit 107.

  In the example of FIG. 1, the blood pressure measuring device 100 is worn on the wrist, but may be worn anywhere as long as the blood pressure of the user can be measured. The method of measuring the blood pressure may be any method. In the present embodiment, it is mainly assumed that an oscillometric method of measuring blood pressure by pressurizing or depressurizing the cuff is applied. In the oscillometric method, the blood pressure measurement device 100 measures a user's blood pressure value using a cuff, a cuff tube, a pressure sensor, a pump, and a valve. The blood pressure measurement device 100 corresponds to the “blood pressure measurement device” of the present invention. The first blood pressure sensor is mainly used to measure the blood pressure of the user after the initial setting, and priority is given to ease of measurement, and is used when determining the correction formula also at the time of the initial setting. The second blood pressure sensor mainly measures a blood pressure value serving as a user's reference at the time of initial setting (for example, as described later, detects a blood pressure fluctuation range from this blood pressure value). It is also desirable that the correction formula has high accuracy, and is used when calculating the correction component of the correction formula when determining the correction formula. Specifically, for example, the first blood pressure sensor is a wrist type blood pressure monitor, and the second blood pressure sensor is an upper arm type blood pressure monitor.

  Further, the second blood pressure sensor may be, for example, the same as the first blood pressure sensor. When the second blood pressure sensor is used as the second blood pressure sensor in the initial setting, an environment is set so that accurate blood pressure measurement can be performed, and then the measurement is performed. By doing so, it may be considered that the sensor can be used as the second blood pressure sensor.

  As described above, in the example of the outline, the blood pressure measurement device 100 uses the sensor information acquisition unit 102 from one or more sensors 151 and 152 and / or the sensor unit 101 to be attached to the user. Get height information. The posture calculation unit 103 obtains detailed data related to the posture of the user by calculation from the posture information of the user. Since the height calculation unit 104 acquires the height information of the sensor and the mounting position of the sensor is initially set, the difference between the height of the heart of the user and the height of the blood pressure sensor included in the blood pressure measurement device 100 (for example, (The height of the blood pressure sensor based on the heart) can be calculated.

  The correction unit 105 receives the blood pressure value measured by the blood pressure measurement unit 106, and performs measurement based on the data on the posture calculated by the posture calculation unit 103 and the height difference obtained by the height calculation unit 104. The corrected blood pressure value is corrected. As a result, based on the information from the sensor attached to the user, the blood pressure obtained by correcting the blood pressure value measured by the blood pressure measurement unit of the blood pressure measurement device, the blood pressure before correction, and the user's blood pressure measurement state at the time of measurement are displayed. A blood pressure measurement device capable of obtaining an accurate blood pressure value when the user is in an arbitrary posture by presenting the blood pressure value to the user, and presenting the reliability of the obtained blood pressure value together with the blood pressure value data before and after the correction; Methods and programs can be provided.

[Configuration example]
(Hardware configuration)
<Blood pressure measurement device>
Next, an example of a hardware configuration of the blood pressure measurement device 200 according to the present embodiment will be described with reference to FIG.
As shown in FIG. 2, the blood pressure measurement device 200 according to the present embodiment includes an output device 211, an input device 212, a control unit 213, a storage unit 214, a drive 215, an external interface 216, a communication interface 217, a power supply 218, and a clock. Device 223 includes a computer that is electrically connected. The blood pressure measurement device 200 further includes a pressure sensor 219, a pump drive circuit 220, a pump 221, a pressing cuff 231, an acceleration sensor 225, a gyro sensor 226, and a geomagnetic sensor 227. The blood pressure measurement device 200 according to the present embodiment corresponds to the “blood pressure measurement device” of the present invention. In FIG. 2, the communication interface and the external interface are described as “communication I / F” and “external I / F”, respectively. Here, a case where an oscillometric method is adopted as a blood pressure measurement method will be described as an example.

  The control unit 213 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and controls each component according to information processing. The storage unit 214 is, for example, an auxiliary storage device such as a hard disk drive or a solid state drive. The storage unit 214 executes a correction initial setting program, a correction execution program, a blood pressure measurement program, a measurement result display program, and / or a correction execution program executed by the control unit 213. Alternatively, blood pressure measurement data, which is data of blood pressure measured by the blood pressure measurement device, is stored.

  The correction initial setting program executes an initial setting process (FIGS. 4A and 4B) for calculating parameters to be used in the correction formula for calculating the original blood pressure of the user and a correction formula corresponding to the posture of the user. It is a program to make it. The correction execution program detects the user's posture, calculates a correction formula for correcting the measured blood pressure based on the user's posture, and obtains the user's original blood pressure (FIG. 5). ). The blood pressure measurement program is a program for executing a process of measuring a user's blood pressure, and differs depending on a blood pressure measurement method (for example, an oscillometric method, a tonometry method, or a PTT method). Further, the blood pressure measurement data is blood pressure time-series data obtained by executing the blood pressure measurement program. Details will be described later. Note that the correction method in the embodiment is merely an example, and the present embodiment is established even if another correction method is applied. That is, in the embodiment of the present invention, other correction methods may be used instead of the correction method described here.

  The measurement result display program is a program for displaying blood pressure value data measured by the blood pressure measurement device 200. For example, the measurement result display program displays blood pressure value data before correction together with blood pressure value data after correction, This is a program for executing a process of displaying the posture information and / or height at that time together with the value data.

  The communication interface 217 is, for example, a short-range wireless communication (for example, Bluetooth (registered trademark)) module, a wired LAN (Local Area Network) module, a wireless LAN module, or the like, for performing wired or wireless communication via a network. Interface. The communication interface 217 is an interface for connecting the blood pressure measurement device 200 to an external device (for example, a smartphone or a communication device on a network). The communication interface 217 is controlled by the control unit 213. The communication interface 217 transfers the information received from the external device via the network to the control unit 213. Communication via this network may be either wireless or wired. Note that the communication interface 217 may be capable of transmitting information to an external device via a network. The network may be another type of network such as a hospital LAN, or may be one-to-one communication using a USB (Universal Serial Bus) cable or the like. The communication interface 217 may include a micro USB connector.

  The input device 212 is a device that receives an input, and is, for example, a touch panel, a physical button, a mouse, a keyboard, or the like. The output device 211 is a device that performs output, and outputs information by voice, display, or the like, and is, for example, a display, a speaker, or the like. The external interface 216 is for mediating between the outside and the main body, and is, for example, a USB port or the like, for example, a pressure sensor 219, an acceleration sensor 225, a gyro sensor 226, a geomagnetic sensor 227, a pressure device (for example, This is an interface for connecting to an external device such as the sensor 152) and / or the pump drive circuit 220.

  The storage unit 214 stores the information of the program or the like by electrical, magnetic, optical, mechanical, or chemical action so that the computer or other device or machine or the like can read the information of the recorded program or the like. It is a medium for storing. The blood pressure measurement device 200 may acquire, from the storage unit 214, a correction initial setting program, a correction execution program, a blood pressure measurement program, a measurement result display program, and / or blood pressure measurement data.

  The drive 215 is a device for receiving data stored from an auxiliary storage device, a recording medium, and the like, and in particular, for reading a program. For example, a semiconductor memory drive (flash memory drive), a CD (Compact Disk) And a DVD (Digital Versatile Disk) drive. The type of the drive 215 may be appropriately selected according to the type of the storage medium. The above-described measurement determination and cuff control program, blood pressure measurement program, measurement result display program, and / or blood pressure measurement data may be stored in this storage medium.

  The power supply 218 may be anything that can supply power, for example, a rechargeable secondary battery or an AC power supply that can be obtained from a normal outlet. The power supply 218 supplies power to each element mounted on the main body of the blood pressure measurement device 200. The power supply 218 includes, for example, an output device 211, an input device 212, a control unit 213, a storage unit 214, a drive 215, an external interface 216, a communication interface 217, a pressure sensor 219, a pump drive circuit 220, a pump 221, a valve 222, and a timing device. 223, the acceleration sensor 225, the gyro sensor 226, and the geomagnetic sensor 227.

  The pressure sensor 219 is, for example, a piezoresistive pressure sensor. The pressure sensor 219 detects the pressure in the pressing cuff 231 via the cuff tube (flexible tube) 241 and the flow path forming member 242 that constitute the first flow path. The pressure sensor 219 outputs pressure data (for example, time-series pressure value data) to the control unit 213.

  The pump drive circuit 220 drives or brakes the pump 221 based on a control signal from the control unit 213 (that is, turns on or off the pump 221). The pump drive circuit 220 drives the pump 221 that injects the fluid into the pressing cuff 231 when it is determined that the fluid is to be injected.

  The pump 221 is, for example, a piezoelectric pump. The pump 221 is connected to the pressing cuff 231 such that a fluid can flow through the first channel. The pump 221 can supply a fluid (for example, air) to the pressing cuff 231 through the first channel. The pump 221 is provided with a valve 222 whose opening and closing are controlled as the pump 221 is turned on or off. That is, the valve 222 closes when the pump 221 is turned on, and seals air in the pressing cuff 231. On the other hand, the valve 222 opens when the pump 221 is turned off, and discharges the air in the pressing cuff 231 to the atmosphere through the first flow path. The valve 222 has a function of a check valve, and the discharged air does not flow backward. Alternatively, the control unit 213 may separately perform control of turning on or off the pump 221 and control of opening and closing of the valve 222.

  The acceleration sensor 225 is a sensor that detects acceleration, for example, a three-axis acceleration sensor, and detects acceleration of the sensor with respect to three linearly independent axes (for example, three axes orthogonal to each other). Then, the acceleration sensor 225 outputs an acceleration signal indicating acceleration in three directions to the control unit 213. The acceleration sensor 225 can obtain the roll angle and the pitch angle from the value of the acceleration at rest.

  The acceleration sensor 225 is a general one, and is used to determine the posture of the user. The acceleration sensor 225 can detect a gravitational acceleration when used in a static state on the earth. Actually, since the acceleration sensor 225 can remove a specific frequency component by using signal processing, it is possible to detect the gravitational acceleration within a certain accuracy even if there is some uneven acceleration. Conversely, if a constant acceleration acts on the acceleration sensor 225, the acceleration sensor 225 cannot distinguish between the acceleration and the gravitational acceleration, and cannot accurately detect the gravitational acceleration. The blood pressure measurement device 200 of the present embodiment assumes that the user moves to such an extent that the gravitational acceleration can be detected within a certain accuracy range. For example, in the case of blood pressure measurement during bedtime, the blood pressure measurement device is supposed to move only around the time of turning over, and it is assumed that non-constant acceleration sometimes works. Therefore, the blood pressure measurement device can detect the gravitational acceleration with good accuracy. Therefore, the acceleration sensor 225 of the present embodiment can detect the direction of gravity (that is, the direction of gravitational acceleration).

  The gyro sensor 226 is a general one, and is used to determine the posture of the user. The gyro sensor 226 is, for example, a three-axis gyro sensor, and detects the angular velocity of the sensor with respect to three linearly independent axes. The gyro sensor 226 outputs an angular velocity signal representing the angular velocity in three directions to the control unit 213.

  The geomagnetic sensor 227 is a general one, and is used to determine the posture of the user. The terrestrial magnetism sensor 227 is, for example, a three-axis terrestrial magnetism sensor, and detects the intensity of terrestrial magnetism around the sensor with respect to three axes including the direction and the strength (magnitude).

  The time measuring device 223 is a device that measures time, and can measure date and time. For example, the timing device 223 is a clock including a calendar, and passes information on the current date and time to the control unit 213.

  The specific hardware configuration of the blood pressure measurement device 200 may be appropriately omitted, replaced, or added according to the embodiment. For example, the control unit 213 may include a plurality of processors. The blood pressure measurement device 200 may be composed of a plurality of information processing devices. Further, as the blood pressure measurement device 200, a general-purpose desktop PC (Personal Computer), tablet PC, or the like may be used in addition to the information processing device designed exclusively for the provided service.

(Software configuration)
<Blood pressure measurement device>
Next, an example of a software configuration of the blood pressure measurement device 200 according to the present embodiment will be described with reference to FIG.
When executing a necessary program, the control unit 213 of the blood pressure measurement device 200 executes the correction initial setting program, the correction execution program, the measurement result display program, and / or the blood pressure measurement program stored in the storage unit 214. Expand to RAM. Then, the control unit 213 controls each component by interpreting and executing the correction initial setting program, the correction execution program, the measurement result display program, and / or the blood pressure measurement program developed on the RAM. . Thereby, as shown in FIG. 3, the blood pressure measurement device 200 according to the present embodiment includes a sensor information acquisition unit 301, a posture computation unit 302, a height computation unit 303, a correction unit 305, a cuff pressure acquisition unit 306, a blood pressure measurement A presentation unit 307, a presentation selection unit 308, and a presentation unit 309.

  The input device 212 receives an instruction signal from the user, gives the instruction signal to the control unit 213, and operates the blood pressure measurement device 200. The communication interface 217 transmits, for example, information such as blood pressure measured by the blood pressure measurement device 200 to an external device, and information or signals from the external device, for example, an instruction to start and end the operation of the blood pressure measurement device 200. The signal and the program of the control unit 213 of the blood pressure measurement device 200 are updated.

  The sensor information acquisition unit 301 includes sensor information detected by sensors including the acceleration sensor 225, the gyro sensor 226, and the geomagnetic sensor 227 in the blood pressure measurement device 200, and sensor information acquired from an external sensor via the communication interface 217. To get. The sensor information is information including a physical quantity sensed by the sensor, and is, for example, information on acceleration, angular velocity, geomagnetism, and blood pressure (for example, blood pressure detected by a second blood pressure sensor such as the sensors 151 and 152).

  The posture calculation unit 302 receives the sensor information acquired by the sensor information acquisition unit 301, and calculates a physical quantity of the posture of the user from the sensor information. The attitude calculation unit 302 uses a method (for example, sensor fusion) for correcting an error due to a drift in the angular velocity obtained from the gyro sensor 226 from the information of the acceleration sensor 225 and the geomagnetic sensor 227, and calculates the initial attitude information of the user. The angle may be obtained by integrating the angular velocity, and the attitude angle of each sensor at a desired elapsed time from the initial time may be obtained. As for the initial posture, a roll angle and a pitch angle can be obtained by the acceleration sensor 225. The yaw angle can be obtained using a geomagnetic sensor. The attitude calculation unit 302 calculates a three-dimensional component of the magnetic field in which the tilt error has been corrected, from the three-dimensional component of the magnetic field obtained by the geomagnetic sensor and the previously obtained roll angle and pitch angle. The yaw angle can be calculated from the x and y components of the three-dimensional component of the magnetic field in which the tilt error has been corrected. When the user moves from the initial posture, as described above, the posture calculation unit 302 obtains an angle by time-integrating the angular velocity, and calculates the posture angle of each sensor at an arbitrary time based on the initial posture and the elapsed time. Obtainable.

  The height calculation unit 303 calculates the posture angle of the user at an arbitrary time calculated by the posture calculation unit 302 and the position of the sensor, which has been measured in advance, of each part to the characteristic part (for example, a joint). And the difference between the height of the heart and the height of the blood pressure sensor (here, the height of the blood pressure sensor-the height of the heart, It may be defined by the opposite sign (the sign is not essential), but in this case, the usage and definition of other terms differ according to the sign.) Note that the length from the sensor position of each part to the characteristic part can be measured by a user in advance using a measure or the like, input to the blood pressure measurement device 200 by the input device 212, and the storage unit 214 stores the numerical value. I just need. Further, the length is not limited to this method, and may be obtained automatically by some method.

  The length from the position of the sensor to the characteristic portion is, for example, the length from the position of the sensor attached to the upper arm to the joint between the upper arm and the forearm, and the length from the joint to the blood pressure measurement device 200 attached to the wrist. And so on. The height calculation unit 303 can calculate the difference in height between the blood pressure measurement device 200 and the heart based on the length and the attitude angle of a certain sensor.

First, the correction unit 305 acquires the posture angle for each sensor from the posture calculation unit 302 and the height difference from the height calculation unit 303, and based on the posture information, obtains the blood pressure measurement device 200 (blood pressure). It is determined whether or not the blood pressure value measured by the measuring unit 307) can be corrected only by the difference in height. When the correction unit 305 determines that the correction can be made only by the height difference, the correction unit 305 receives the height difference information from the height calculation unit 303, and calculates the height correction expression (the The correction value is calculated by (1 correction formula). When the height of the blood pressure measurement device (blood pressure sensor) 200 with respect to the heart increases by 1 cm, the original blood pressure decreases by 0.78 mmHg. Therefore, the first correction formula is obtained by adding the blood pressure measured by the blood pressure measurement unit 307 to the first correction formula. The sum of the calculated first correction values is an equation set so as to be the original blood pressure value. That is,
First correction formula: first correction value (mmHg) = height (cm) × 0.78 (mmHg)
Becomes Here, the height indicates how high the blood pressure sensor is from the height of the heart. For example, when the blood pressure sensor is 1 cm higher than the height of the heart, the first correction value = 1 × 0.78 = 0.78 mmHg, which is lower than the original blood pressure by 0.78 mmHg. It can be estimated that a value obtained by adding the first correction value (0.78 mmHg in this case) to the obtained blood pressure value is the original blood pressure value. On the other hand, for example, when the blood pressure sensor is lower than the height of the heart by 1 cm, the first correction value = −1 × 0.78 = −0.78 mmHg, which is higher than the original blood pressure by 0.78 mmHg. The value obtained by adding the first correction value (in this case, -0.78 mmHg) to the blood pressure value detected by the sensor can be estimated to be the original blood pressure value.

On the other hand, when the correction cannot be performed only by the height difference, the correction unit 305 sets the corresponding correction value α based on the user's posture information from the posture calculation unit 302 (that is, the posture angle of each sensor). obtain. The correction value α is a value calculated in association with the attitude angle of each sensor at the time of initial setting (accordingly, in association with the measurement attitude of the user) (described later with reference to FIGS. 4A and 4B). When it is determined that the correction cannot be made only by the height, the correction unit 305 corrects the blood pressure measured by the blood pressure measurement unit 307 using the second correction formula. The second correction formula is such that the sum of the first correction value calculated by the first correction formula and the correction value α is added to the blood pressure measured by the blood pressure measurement unit 307 so that the original blood pressure value is obtained. This is the set expression. That is,
Second correction formula: second correction value (mmHg) = height (cm) × 0.78 (mmHg) + α (mmHg)
Becomes Here, the height has the same definition as the height in the first correction formula, and α is a pressure value determined in accordance with the posture information of the user. The correction unit 305 obtains the height difference from the height calculation unit 303, and obtains α from a storage unit (for example, the storage unit 214) stored in association with the user's posture information. The correcting unit 305 stores the corrected blood pressure value data in the storage unit 214, for example. The storage unit 214 may store the corrected blood pressure value data together with the correction value α and the height (difference). The storage unit 214 may store the pre-correction and post-correction blood pressure value data, and provide (for example, display) both the blood pressure value data to the user via the output device 211.

The cuff pressure acquisition unit 306 acquires the pressure detected by the pressure sensor 219 as a cuff pressure.
The blood pressure measurement unit 307 receives the cuff pressure acquired by the cuff pressure acquisition unit 306, measures the cuff pressure by an oscillometric method, and measures the blood pressure of the user wearing the cuff. The blood pressure measurement unit 307 starts the measurement of the user's blood pressure by the pump drive circuit 220 applying pressure to the pressure cuff 231, and outputs the pressure value of the pressure cuff 231 measured by the pressure sensor 219 via the cuff pressure acquisition unit 306. receive. The blood pressure values (systolic blood pressure value and diastolic blood pressure value) measured by the blood pressure measurement unit 307 are the blood pressure values of the user wearing the cuff. The blood pressure value data is stored in the storage unit 214 together with the correction information, for example. The blood pressure measurement device 200 may use the time measurement device 223 to acquire the time when the blood pressure was measured together with the blood pressure value. The storage unit 214 stores, for example, blood pressure value time-series data. The blood pressure measurement unit 307 may use any blood pressure measurement method as long as it performs blood pressure measurement.

The presentation selection unit 308 selects the content of the blood pressure measurement result to be presented to the user based on the user's instruction or the like from the input device 212. The presentation selection unit 308 acquires the user's posture information from the posture calculation unit 302, acquires the height information from the height calculation unit 303, acquires the corrected blood pressure value data from the correction unit 305, and acquires the blood pressure measurement unit 307. , The uncorrected blood pressure value data is obtained. The presentation selection unit 308 acquires these pieces of information and data, and selects a presentation pattern based on a user instruction or the like. The presentation pattern may have a plurality of variations of presenting the blood pressure value data before and after correction, the blood pressure measurement state of the user at the time of measurement, and presenting the reliability of the blood pressure value data that can be calculated from these. The presentation pattern includes, for example, presenting only the blood pressure value data with the highest reliability, presenting corrected blood pressure value data and blood pressure value data before correction simultaneously, presenting only blood pressure value data before correction, and correction. For example, the blood pressure value data and the posture and height information of the user at the time of measurement are presented. In addition, the presentation selection unit 308 calculates the reliability of the corrected blood pressure value or the uncorrected blood pressure value from the acquired information.
In addition, after obtaining the presentation pattern, the presentation selection unit 308 selects one or more of the posture calculation unit 302, the height calculation unit 303, and the correction unit 305 to obtain necessary data corresponding to the presentation pattern. May be operated to obtain and present necessary data. That is, the presentation selection unit 308 may collect necessary data according to the presentation pattern without acquiring all the data in advance. In this case, compared to preparing all data in advance, it is possible to use less resources and consume less resources and to reduce the storage capacity, so that hardware resources can be used efficiently.

  The presentation unit 309 passes the information and data obtained by the presentation selection unit 308 to the output device 211 or causes the storage unit 214 to store the information and data in accordance with the presentation pattern selected by the presentation selection unit 308.

<Others>
The operation of the blood pressure measurement device 200 will be described in detail in an operation example described later. In the present embodiment, the control unit 213 of the blood pressure measurement device 200 may be realized by a general-purpose CPU. However, some or all of the above functions may be implemented by one or more dedicated processors. In addition, the configuration of the blood pressure measurement device 200 may be appropriately omitted, replaced, or added according to the embodiment.

[Operation example]
(Initial setting)
Next, an example of an initial setting operation performed before the blood pressure measurement of the blood pressure measurement device 200 will be described with reference to FIGS. 4A and 4B. FIGS. 4A and 4B are flowcharts illustrating an example of a processing procedure of the initial setting of the blood pressure measurement device 200. Note that the processing procedure described below is merely an example, and each processing may be changed as much as possible. Further, in the processing procedure described below, steps can be omitted, replaced, and added as appropriate according to the embodiment. That is, this initial setting method is merely an example, and another setting method may be used.

(Start-up)
First, the user activates the blood pressure measurement device 200, and the control unit 213 determines whether or not the initialization has been performed. If it is determined that the initialization has not been performed, the control unit 213 starts the correction initialization program. Execute The control unit 213 of the blood pressure measurement device 200 proceeds with the processing according to the following processing procedure.

(Step S401)
In step S401, the control unit 213 operates as the sensor information acquisition unit 301 and / or the posture calculation unit 302, and detects or receives a user's measurement posture (for example, standing, sitting, or lying). The sensor information acquisition unit 301 receives, for example, what the user uses the input device 212 to select and input the posture. In addition, the blood pressure measurement device 200 may automatically acquire the measurement posture of the user. For example, when the sensor attached to the user includes an acceleration sensor, the direction of the acceleration sensor is the direction of gravitational acceleration when the user is at rest, so the position where the sensor is mounted and the direction of the sensor are set. If so, it is possible to determine the measurement posture of the user. In addition, the external device acquires the posture of the user as an image and analyzes the image to determine whether the measurement posture of the user is standing, sitting, or lying down. The information may be passed to the sensor information acquisition unit 301 via the interface.

(Step S402)
In step S402, the control unit 213 operates as the posture calculation unit 302, and determines whether the measurement posture of the user is standing from the sensor information acquisition unit 301. If the user's measurement posture is standing, the posture calculation unit 302 proceeds to step S403. If the measurement posture of the user is not standing, the posture calculation unit 302 proceeds to step S406.

(Step S403)
In step S403, the control unit 213 operates as the sensor information acquisition unit 301, and instructs the user to set the blood pressure sensor (second blood pressure sensor) mounted on the upper arm at the same height as the heart. The posture calculation unit 302 may determine whether or not the user has the upper arm at the height of the heart. The blood pressure measured by the second blood pressure sensor may be the blood pressure acquired by the blood pressure measurement unit 307 via the pressure sensor 219. In this case, the user may place the cuff more accurately at the position of the heart. It is desirable to set the blood pressure measurement to be more accurate by making the exercise state static or the like.

(Step S404)
In step S404, the control unit 213 operates as the sensor information acquisition unit 301, and measures the upper arm blood pressure a plurality of times using the second blood pressure sensor.

(Step S405)
In step S405, the control unit 213 operates as the sensor information acquisition unit 301, and calculates a fluctuation range in which the blood pressure measured in step S404 fluctuates.

(Step S406)
In step S406, the control unit 213 operates as the posture calculation unit 302, and determines from the sensor information acquisition unit 301 whether the measurement posture of the user is sitting. Posture calculation unit 302 proceeds to step S407 if the user's measured posture is sitting, and proceeds to step S408 if the user's measured posture is not sitting.

(Step S407)
In step S407, the control unit 213 operates as the sensor information acquisition unit 301, and proceeds from step S403 assuming that the measurement posture of the user is sitting.

(Step S408)
In step S408, the control unit 213 operates as the sensor information acquisition unit 301, and proceeds from step S403 assuming that the measurement posture of the user is lying.

(Step S409)
In step S409, the control unit 213 operates as the sensor information acquisition unit 301, and classifies whether to consider a parameter when the joint is not bent (corresponding to the correction value α). The process proceeds to step S410 when examining parameters when the joint is not bent, and proceeds to step S451 when examining parameters when the joint is not bent.

(Step S410)
In step S410, the control unit 213 operates as the sensor information acquisition unit 301, and causes the blood pressure measurement device 200 (first blood pressure sensor) mounted on the wrist to be in the same state as the heart without bending the joint without bending the joint. Instruct the user to height. The posture calculation unit 302 may determine whether or not the user has the wrist at the height of the heart without bending the joint.

(Step S411)
In step S411, the control unit 213 operates as the sensor information acquisition unit 301, the cuff pressure acquisition unit 306, the blood pressure measurement unit 307, and the height calculation unit 303. The sensor information acquisition unit 301 acquires the blood pressure measured by the second blood pressure sensor with the upper arm without bending the joint. Also, the blood pressure measurement device 200 mounted on the wrist, including the cuff pressure acquisition unit 306 and the blood pressure measurement unit 307, operates, and measures the blood pressure without bending the joint. Further, the height calculation unit 303 measures the height of the blood pressure measurement device 200 with respect to the upper arm at the time of the measurement (that is, the height of the blood pressure measurement device 200 based on the height of the heart; (the height of the blood pressure measurement device 200)) -(Heart height) is calculated.

(Step S412)
In step S412, the control unit 213 operates as the correction unit 305, calculates a correction value of the blood pressure value corresponding to the height, and further calculates the blood pressure value of the wrist and the blood pressure fluctuation width calculated in step S405. Then, the correction unit 305 calculates an addition value ((1) in FIG. 4A) obtained by adding the blood pressure value of the wrist, the correction value corresponding to the height, and the blood pressure fluctuation width. That is,
Addition value (1) = Wrist blood pressure value + Height correction value + Blood pressure fluctuation range (Under bending the joint)
Becomes

(Step S413)
In step S413, the control unit 213 operates as the correction unit 305, and determines whether the added value calculated in step S412 is equal to the upper arm blood pressure value detected in step S411. When it is determined that the added value (1) is equal to the upper arm blood pressure value, the process proceeds to step S414, and when it is not determined that the added value is equal to the upper arm blood pressure value, the process proceeds to step S416. Although not described in detail here, “equal to the blood pressure value” means that the blood pressure values are equal within a certain fluctuation range. Taking this description as an example, "the addition value (1) is equal to the blood pressure value of the upper arm" means that the value of the addition value (1) is larger than the blood pressure value of the upper arm minus the fluctuation range and the blood pressure of the upper arm. + Indicates that it is smaller than the fluctuation range. “Equal to the blood pressure value” is used in the following description in the same meaning as here.

(Step S414)
In step S414, the control unit 213 operates as the correction unit 305, and determines that the blood pressure measured by the blood pressure measurement unit 307 can be corrected to the original blood pressure of the user only by the height. Further, the correction unit 305 acquires the user's posture at that time from the sensor information acquisition unit 301 and causes the storage unit 214 to store the posture. Alternatively, unlike this, the posture of the user may not be acquired and not stored. In this case, it is sufficient to determine that all postures for which the user's measured posture is not recorded in the storage unit 214 can be corrected only by the height (FIG. 4A shows this case).

(Step S415)
In step S415, the control unit 213 operates as the correction unit 305, and determines a correction formula when the user's measurement posture is standing based on the determination of the correction unit 305. This correction equation corresponds to the above-described first correction equation.

(Step S416)
In step S416, the control unit 213 operates as the correction unit 305. If the addition value (1) is not equal to the blood pressure value of the upper arm, the control unit 213 determines that correction using only the height is impossible.

(Step S417)
In step S417, the control unit 213 operates as the sensor information acquisition unit 301 and the posture calculation unit 302, and stores the measured posture of the user in the storage unit 214.

(Step S418)
In step S418, the control unit 213 operates as the correction unit 305, and obtains a correction parameter (correction value α1) other than the height (difference in height) when the joint is not bent. The correction value α1 is represented by the following equation.

Correction value α1 = upper arm blood pressure value− (1) Value The correction value α1 differs depending on the difference in blood vessel diameter or the degree of blood vessel compression due to the posture of the user. The larger the blood vessel diameter, the lower the blood pressure. Also, the blood pressure becomes lower as the degree of pressure on the blood vessels increases. Therefore, the value of (1) decreases and the correction value α1 increases as the diameter of the blood vessel increases and the degree of compression of the blood vessel increases.

(Step S419)
In step S419, the control unit 213 operates as the correction unit 305, and determines a correction formula (second correction formula) for the posture of the user. That is,
Second correction value (mmHg) = height (cm) × 0.78 (mmHg) + correction value α1 (mmHg)
Becomes However, the height and the correction value α1 are defined as described above.

  Next, a processing procedure when the determination is No in step S409 of FIG. 4A will be described with reference to FIG. 4B.

(Step S451)
In step S451, the control unit 213 operates as the sensor information acquisition unit 301, and causes the blood pressure measurement device 200 (including the first blood pressure sensor) mounted on the wrist to bend a joint so as to be at the same height as the heart. Instruct the user. In addition, the posture calculation unit 302 may determine that the user is bending the joint and setting the wrist at the height of the heart.

(Step S452)
In step S452, the control unit 213 operates as the sensor information acquisition unit 301, the cuff pressure acquisition unit 306, the blood pressure measurement unit 307, and the height calculation unit 303. The sensor information acquisition unit 301 acquires the blood pressure (upper arm blood pressure) measured by the second blood pressure sensor with the upper arm while the joint is bent. The blood pressure measurement device 200 mounted on the wrist including the cuff pressure acquisition unit 306 and the blood pressure measurement unit 307 operates to measure the blood pressure with the joint bent. In addition, the height calculation unit 303 calculates the height of the blood pressure measurement device 200 with respect to the upper arm at the time of the measurement (that is, the difference between the height of the heart and the height of the blood pressure measurement device 200 based on the height of the heart). I do.

(Step S453)
In step S453, the control unit 213 operates as the correction unit 305, calculates the correction value of the blood pressure value corresponding to the height in a state where the joint is bent, and further calculates the blood pressure value of the wrist and the blood pressure value calculated in step S405. Calculate the fluctuation range. Then, the correction unit 305 calculates an added value ((2) in FIG. 4B) obtained by adding the blood pressure value of the wrist, the correction value corresponding to the height, and the blood pressure fluctuation width in a state where the joint is bent. I do. That is,
Addition value (2) = wrist blood pressure value + height correction value + blood pressure fluctuation range (under joint bending)
Becomes

(Step S454)
In step S454, the control unit 213 operates as the correction unit 305, and determines whether the added value calculated in step S453 is equal to the upper arm blood pressure value detected in step S452. When it is determined that the added value (2) is equal to the upper arm blood pressure value, the process proceeds to step S455, and when it is not determined that the added value is equal to the upper arm blood pressure value, the process proceeds to step S457.

(Step S455)
In step S455, the control unit 213 operates as the correction unit 305, and determines that the blood pressure measured by the blood pressure measurement unit 307 can be corrected to the original blood pressure of the user only by the height. Further, the correction unit 305 acquires the user's posture at that time from the sensor information acquisition unit 301 and causes the storage unit 214 to store the posture. Alternatively, unlike this, the posture of the user may not be acquired and not stored. In this case, it is only necessary to determine that all postures for which the user's measured posture is not recorded in the storage unit 214 can be corrected only by the height (FIG. 4B shows this case).

(Step S456)
In step S456, the control unit 213 operates as the correction unit 305, and determines a correction formula for the case where the user's measurement posture is standing based on the determination of the correction unit 305. This correction equation corresponds to the above-described first correction equation.

(Step S457)
In step S457, the control unit 213 operates as the correction unit 305. If the addition value (2) is not equal to the upper arm blood pressure value, the control unit 213 determines that correction using only the height is impossible.

(Step S458)
In step S458, the control unit 213 operates as the sensor information acquisition unit 301 and the posture calculation unit 302, and stores the measured posture of the user in the storage unit 214.

(Step S459)
In step S459, the control unit 213 operates as the correction unit 305, and obtains a correction parameter (correction value α2) other than the height (height difference) when the joint is bent. The correction value α2 is represented by the following equation.

Correction value α2 = value of upper arm blood pressure− (2) The correction value α2 differs depending on the difference in blood vessel diameter or the degree of blood vessel compression due to the posture of the user. The larger the blood vessel diameter, the lower the blood pressure. Also, the blood pressure becomes lower as the degree of pressure on the blood vessels increases. Therefore, the value of (2) decreases and the correction value α2 increases as the diameter of the blood vessel increases and the degree of compression of the blood vessel increases.

(Step S460)
In step S460, the control unit 213 operates as the correction unit 305, and determines a correction formula (second correction formula) for the posture of the user. That is,
Second correction value (mmHg) = height (cm) × 0.78 (mmHg) + correction value α2 (mmHg)
Becomes However, the height and the correction value α2 are defined as described above.

  The above is the processing procedure in the case where it is determined that the user is standing in step S402. However, when it is determined that the user is sitting or lying in step S406, the measurement posture of the user is merely changed from standing to sitting or lying, The executed process is the same as in the case of standing. That is, steps S407 and S408 are essentially the same as steps S403 to S460 (excluding steps S406, 407, and 408).

(Measurement of blood pressure: by first blood pressure sensor)
Next, an operation example in which the blood pressure measurement device 200 measures the blood pressure and further corrects the blood pressure will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of a processing procedure in the blood pressure measurement of the blood pressure measurement device 200.

(Start-up)
First, the user activates the blood pressure measurement device 200, and when the control unit 213 determines that the initial setting is completed, the control unit 213 executes the blood pressure measurement program and the correction execution program on the activated blood pressure measurement device 200. Execute The control unit 213 of the blood pressure measurement device 200 proceeds with the processing according to the following processing procedure.

(Step S501)
In step S501, the control unit 213 operates as the cuff pressure acquisition unit 306 and the blood pressure measurement unit 307, and measures the blood pressure value of the user.

(Step S502)
In step S502, the control unit 213 operates as the sensor information acquisition unit 301, the posture calculation unit 302, and the height calculation unit 303, and obtains a measurement posture (height and posture angle). The sensor information acquisition unit 301 acquires the posture angle of the user from the acceleration sensor 225, the gyro sensor 226, and the geomagnetic sensor 227, and acquires sensor data from an external sensor via the communication interface 217. The posture calculation unit 302 receives the sensor information from the sensor information acquisition unit 301, and calculates the posture of the user based on the sensor information. The height calculation unit 303 receives the sensor information from the sensor information acquisition unit 301 and calculates a difference in height between the heart and the blood pressure measurement device 200.

(Step S503)
In step S503, the control unit 213 operates as the correction unit 305, and determines in step S502 whether the blood pressure value of the user measured by the blood pressure measurement unit 307 can be corrected from only the height acquired in step S502. It is determined from the posture information of the user. This posture information is calculated by the processing procedure of FIGS. 4A and 4B and stored in the storage unit 214. That is, the posture information is stored in the storage unit 214 together with the correction value α (the correction value α1 or the correction value α2 is also collectively referred to as a correction value α) when the posture information can be corrected only by the height or cannot be corrected only by the height. It is remembered. Note that, as described above, the posture information stored in the storage unit 214 may be only information that cannot be corrected due to only the height.

  If it is determined that correction is possible only with the height, the process proceeds to step S504. If it is not determined that correction is possible only with the height, the process proceeds to step S506.

(Step S504)
In step S504, the control unit 213 operates as the correction unit 305, and calculates a correction value using a correction expression determined only by the height calculated in step S502. The correction formula is the first correction formula described above. At this time, the original blood pressure of the user corresponds to a value obtained by adding the first correction value to the blood pressure value measured by the blood pressure measuring unit 307.

(Step S505)
In step S505, the control unit 213 operates as the correction unit 305, and presents to the user the user's original blood pressure value calculated in the immediately preceding step and the uncorrected blood pressure value obtained in step S501. For example, the correction unit 305 and the blood pressure measurement unit 307 store the original blood pressure value of the user obtained by the correction and the blood pressure value before the correction in the storage unit 214, and the control unit 213 reads the stored blood pressure value from the storage unit 214. The blood pressure values are read and passed to the output device 211, which displays those blood pressure values.

(Step S506)
In step S506, the control unit 213 operates as the correction unit 305, and acquires the correction value α1 or α2 corresponding to the user's measurement posture detected in step S502 from the storage unit 214.

(Step S507)
In step S507, the control unit 213 operates as the correction unit 305, applies the correction value α1 or α2 called from the storage unit 214 in step S506 to the second correction expression, and corrects the correction value corresponding to the measurement posture of the user. Is calculated.

  Here, there are various measurement blood pressure measurement programs depending on the blood pressure method, and the program is not limited to a specific method as long as the blood pressure value of the user can be measured. Here, as a typical example, the blood pressure measurement by the oscillometric method will be briefly described (for a specific example of another method, see the modified example).

  When blood pressure is measured according to a general oscillometric method, the following operation is performed. First, the pressing cuff 231 is wound around a measurement site (for example, upper arm) of the user in advance. When the measurement is started, the pump 221 and the valve 222 are controlled to increase the cuff pressure higher than the systolic blood pressure, and thereafter, the pressure is gradually reduced.

  The blood pressure measurement unit 307 passes an instruction to pressurize via the pump drive circuit 220, and instructs the pressurizing cuff 231 to be pressurized using the pump 221 (that is, injecting fluid into the pressing cuff 231), Pressurization is started.

  In terms of hardware, at the start of blood pressure measurement, the control unit 213 initializes a processing memory area of the RAM and outputs a control signal to the pump drive circuit 220. The pump drive circuit 220 opens the valve 222 of the pump 221 and exhausts the air in the pressing cuff 231 based on the control signal. Subsequently, the control unit 213 performs control for adjusting the pressure sensor 219 to ± 0 mmHg. Then, the pump drive circuit 220 closes the valve 222 of the pump 221, and thereafter, the pump drive circuit 220 drives the pump 221 to perform control for injecting fluid into the pressing cuff 231. Thus, the pressing cuff 231 is pressurized to the same pressure and expands.

  The pressure sensor 219 detects the pressure of the pressing cuff 231 and determines whether the pressure has reached a preset target pressure value. If the target pressure value has not been reached, the process returns to step S901. If the target pressure value has been reached, the process proceeds to the next step. Here, the target pressure value is a pressure value sufficiently higher than the user's systolic blood pressure value (for example, the systolic blood pressure value + 30 mmHg), and is stored in advance in the storage unit 214 or the pressure of the pressing cuff 231. During the pressure, the control unit 213 estimates and determines the systolic blood pressure value by a predetermined calculation formula.

  When the pressure cuff 231 is pressurized and reaches a preset target pressure value, the control unit 213 stops the pump 221 via the pump drive circuit 220, and then gradually opens the valve 222 of the pump 221. Control. Thereby, the pressure cuff 231 is contracted and the pressure is gradually reduced.

  In the pressure reduction process started earlier, the pressure sensor 219 detects the pressure value of the pressing cuff 231 and outputs a cuff pressure signal. In the process of reducing the pressure, the cuff pressure is detected, and a change in arterial volume generated in the artery at the measurement site is extracted as a pulse wave signal. At this time, a change in the amplitude of the pulse wave signal (mainly, rise and fall) accompanying the change in the cuff pressure is acquired. As for the decompression speed, a target decompression speed is set during pressurization of the pressing cuff 231, and the blood pressure measurement unit 307 controls the opening degree of the valve 222 of the pump 221 so as to reach the target decompression speed.

  Based on the cuff pressure signal, a blood pressure value (systolic blood pressure value and diastolic blood pressure value) is calculated by applying a known algorithm by an oscillometric method. More specifically, the systolic blood pressure (Systolic Blood Pressure) and the diastolic blood pressure (Diastolic Blood Pressure) are calculated based on the change in the amplitude of the pulse wave signal (mainly, rise and fall) due to the change in the cuff pressure. After calculating the blood pressure value, the blood pressure measurement unit 307 performs control to store the calculated blood pressure value in the storage unit 214. When the measurement is completed, the blood pressure measurement unit 307 performs control to open the valve 222 of the pump 221 via the pump driving circuit 220 and exhaust air from the pressing cuff 231. The calculation of the blood pressure value is not limited to the depressurization process, and may be performed in the pressurization process.

(Measurement result display)
Next, an operation example of how the blood pressure measurement device 200 displays the blood pressure value data obtained by measuring the blood pressure, the blood pressure value data obtained by correcting the blood pressure, and the blood pressure measurement state will be described with reference to FIG. FIG. 6 is a flowchart illustrating an example of a processing procedure for displaying a measurement result after blood pressure measurement by blood pressure measurement device 200.

  First, when the user activates the blood pressure measurement device 200 and the control unit 213 determines that the blood pressure measurement and the blood pressure correction have been completed, the control unit 213 executes the measurement result display program on the activated blood pressure measurement device 200. Execute The control unit 213 of the blood pressure measurement device 200 proceeds with the processing according to the following processing procedure.

(Step S601)
In step S601, the control unit 213 operates as the presentation selection unit 308, and generates a display pattern of a measurement result based on data from the posture calculation unit 302, the height calculation unit 303, the correction unit 305, and the blood pressure measurement unit 307. Alternatively, a pattern in which the user or the like displays the measurement result may be set in advance based on the data acquired by the presentation selection unit 308. This setting may be performed by the user via the input device 212 or may be performed from the outside via the communication interface 217. The information that can be obtained by the presentation selection unit 308 includes posture information of the user (posture such as standing, posture angle of a body part to which the sensor is attached), and height information of the sensor (measured by the height of the heart). Or how high or low it was measured from the heart), corrected blood pressure value data, and blood pressure value data before correction. Further, the presentation selecting unit 308 calculates the reliability of the corrected blood pressure value or the uncorrected blood pressure value from these pieces of information.

(Step S602)
In step S602, the control unit 213 operates as the presentation selection unit 308, and determines whether to display all uncorrected data measured by the blood pressure measurement unit 307 of the blood pressure measurement device 200. If all uncorrected blood pressure value data are to be displayed, the process proceeds to step S603. If it is not determined to display all uncorrected blood pressure value data, the process proceeds to step S606.

(Step S603)
In step S603, the control unit 213 operates as the presentation selection unit 308 and the correction unit 305. Based on the posture information and the height information acquired by the presentation selection unit 308, the control unit 213 determines whether the blood pressure sensor does not correspond to the height of the heart. It is determined whether or not the corrected blood pressure value data corresponding to the height of the heart is displayed to the user. The presentation selecting unit 308 proceeds to step S604 when determining to correct the blood pressure value data corresponding to the height of the heart, and proceeds to step S608 when determining not to correct the blood pressure value data corresponding to the heart height. move on.

(Step S604)
In step S604, the control unit 213 operates as the presentation selection unit 308, and determines to display the blood pressure value data corrected by the correction unit 305.

(Step S605)
In step S605, the control unit 213 operates as the presentation selection unit 308 and the presentation unit 309, displays the measured uncorrected blood pressure value data, and further displays the posture information, the height information, and the corrected blood pressure value data. (Display pattern of (2); see FIG. 8).

(Step S606)
In step S606, the control unit 213 operates as the presentation selection unit 308, and determines that only the measured blood pressure value data is displayed by the blood pressure sensor at the height corresponding to the height of the heart.

(Step S607)
In step S607, the control unit 213 operates as the presentation selection unit 308 and the presentation unit 309, and displays only the blood pressure value data measured at the height corresponding to the height of the heart among the blood pressure value data ((4)). Display pattern; see FIG. 10).

(Step S608)
In step S608, the control unit 213 operates as the presentation selection unit 308, determines whether or not to display the blood pressure value data for each measurement posture, and proceeds to step S609 if it determines to display the blood pressure value data for each measurement posture. If it is not determined that the display is performed for each measurement posture, the process proceeds to step S610. Here, the determination by the presentation selection unit 308 in step S608 is, for example, instructed by the user or the like via the input device 212 or the communication interface 217 in step S601, or which step to proceed to is set in advance. Is also good. For example, if all blood pressure value data has been acquired at the height of the heart, the process may proceed to step S610.

(Step S609)
In step S609, the control unit 213 operates as the presentation selection unit 308 and the presentation unit 309, and displays the blood pressure value data for each measurement posture of the user (display pattern (5); see FIG. 11).

(Step S610)
In step S610, the control unit 213 operates as the presentation selection unit 308, displays the result of the posture information and the height information in addition to all the measured blood pressure value data, and displays a result other than the height corresponding to the height of the heart. It is determined whether or not the blood pressure value data measured in the above is displayed so as to be distinguished by adding a color and / or a flag to the corresponding period. If the presentation selecting unit 308 determines that the blood pressure value data measured at a height other than the height corresponding to the height of the heart is displayed so as to be distinguished by adding a color and / or a flag to the corresponding period, step S611. The process proceeds to step S612 if not determined in this way.

(Step S611)
In step S611, the control unit 213 operates as the presentation selection unit 308 and the presentation unit 309, displays the result of the posture information and the height information in addition to all the measured blood pressure value data, and corresponds to the height of the heart. The blood pressure value data measured at a height other than the required height is displayed with a color or a flag added to the corresponding period ((3) display pattern; see FIG. 9) and corrected so that the blood pressure value data is not displayed.

(Step S612)
In step S612, the control unit 213 operates as the presentation selection unit 308 and the presentation unit 309, and displays only all measured blood pressure value data (display pattern (1); see FIG. 7). In this step, the corrected blood pressure value data, posture information, height information, and the like are not displayed.

  In the operation described above, all the measurement information has already been acquired by the blood pressure measurement device 200 at the stage of step S601, and how to display the measurement information has been described. Alternatively, the blood pressure value data, the user's posture information, and the height information may be calculated or corrected at the necessary steps. In this case, for each step in FIG. 6, at least one of the posture calculation unit 302, the height calculation unit 303, and the correction unit 305 operates to acquire information. In this case, for example, in the case of Yes in step S603, if there is no blood pressure sensor at the height of the heart, the blood pressure value corresponding to the height of the heart is corrected when this step is reached. However, even in this case, the blood pressure measurement unit 307 always acquires blood pressure value data.

Next, an example of a table result by the blood pressure measurement device 200 will be described with reference to FIGS. 7, 8, 9, 10, and 11.
(Measurement result display (1))
An example of the measurement result display (1) displayed in step S612 will be described with reference to FIG.
The measurement result display (1) corresponds to a case where the measured blood pressure value data is displayed as it is. The presentation unit 309 displays a blood pressure value corresponding to each time. Further, the presentation selecting unit 308 may display a comment as shown in FIG. 7 as the reliability of the blood pressure value data. In the example of FIG. 7, the blood pressure value data measured during the period from 0:00 to 3:00 is generally high and stable as compared with other periods. It can be seen that the blood pressure value data in the period from 0:00 to 3:00 fluctuates from the blood pressure value data in other periods. However, in the example of FIG. 7, it cannot be determined whether the change is due to the user's posture information and / or height information.

  Therefore, the cause when the blood pressure value data fluctuates cannot be specified in the measurement result display (1). In addition, the presentation selecting unit 308 determines from the blood pressure value data that “the blood pressure at 0:00 to 3:00 fluctuates. It is not known whether the blood pressure itself fluctuates or the influence of the measurement posture (height or posture).” The comment can be displayed by the presentation unit 309.

(Measurement result display (2))
An example of the measurement result display (1) displayed in step S605 will be described with reference to FIG.
In the measurement result display (2), the presentation unit 309 displays the measured blood pressure value data as it is, similarly to the measurement result display (1), and also displays the posture information and the height information according to the time of the blood pressure value data. I do. Further, the presentation unit 309 also displays data corrected to blood pressure value data corresponding to the height of the heart (that is, the original blood pressure value data of the user). According to the measurement display result (2), the period during which the blood pressure value data fluctuates (the period from 0:00 to 3:00) has a different height from the other periods as compared with the other periods. Prove. In the example of FIG. 8, it can be seen that the wrist on which the blood pressure measurement device 200 is worn is 10 cm lower than the heart during the fluctuating period, so it can be estimated that this height is the cause. Further, in the example of FIG. 8, the presenting unit 309 also displays corrected blood pressure value data (including an uncorrected period), so that the blood pressure fluctuation indicates the blood pressure measurement state (the posture of the user, the height between the blood pressure sensor and the heart). (Difference in height) or the original blood pressure of the user.

  In the example of FIG. 8, the blood pressure fluctuates in the period from 0 to 3 o'clock from the above figure, but it can be considered that the cause is that the height of the blood pressure sensor from the heart has decreased by 10 cm. In the example of FIG. 8, it can be clearly seen from the lower diagram that the original blood pressure of the user does not fluctuate. In addition, the presentation selection unit 308 reads, from this blood pressure value data, “In the measurement results in the upper diagram, the blood pressure at 0:00 to 3:00 fluctuates, but this is due to the effect that the height has decreased by 10 cm. The blood pressure itself does not fluctuate. "Can be displayed by the presentation unit 309.

(Measurement result display (3))
An example of the measurement result display (3) displayed in step S611 will be described with reference to FIG.
In the measurement result display (3), the presentation unit 309 displays the measured blood pressure value data as it is, similarly to the measurement result display (2), and also displays the posture information and the height information according to the time of the blood pressure value data. I do. In (3), the presentation unit 309 sets a flag when the height of the blood pressure sensor is not the height of the heart during the measurement value period. The flag in this case indicates that reliability is low because the blood pressure sensor is not at the height of the heart, and also indicates that the reliability increases as the height increases. Conversely, an identifier may be added to a period of reliable blood pressure value data so that the period can be distinguished.

  In the example of FIG. 9, the blood pressure fluctuates in the period from 0 to 3 o'clock, but it also indicates how low the reliability is because the height of the blood pressure sensor from the heart has decreased by 10 cm. Can be determined by In addition, the presentation selection unit 308 presents a comment such as “The blood pressure has exceeded 135 mmHg between 0:00 and 3:00, but it is considered to be the effect of the change in height.” 309 can be displayed.

(Measurement result display (4))
An example of the measurement result display (4) displayed in step S607 will be described with reference to FIG.
In the measurement result display (4), the presentation unit 309 displays only the blood pressure value data measured when the blood pressure sensor is at the height of the heart among the measured blood pressure value data (that is, only the highly reliable blood pressure value data). indicate.

  By displaying only reliable data, the user does not need to distinguish whether the data is reliable, and user convenience is improved.

  In the example of FIG. 10, the blood pressure at bedtime has a tendency not to fluctuate. In addition, the presentation selection unit 308 receives the blood pressure value data, and receives a message indicating that “in the case of a person with normal blood pressure, the blood pressure tends to decrease at night, but in your case, the blood pressure at night exceeds 135 mmHg. Let's see a doctor. "Can be displayed by the presentation unit 309.

(Measurement result display (5))
An example of the measurement result display (5) displayed in step S609 will be described with reference to FIG.
In the measurement result display (5), the presentation unit 309 displays the time history of the blood pressure value data for each posture information in accordance with the time of the blood pressure value data among the measured blood pressure value data. In the example of FIG. 11, height information is also displayed together with blood pressure value data for each posture information.

  According to the measurement result display (5), since the blood pressure value data for each posture of the user can be browsed, it becomes easy for the user or the like to grasp the fluctuation of the blood pressure value due to the posture. In addition, height information is also displayed in the measurement result display (5), which makes it easier for the user to grasp the change in blood pressure value between the user's posture and height.

In the example of FIG. 11, the user takes a posture of (1) supine, (2) right lateral supine, and (3) left lateral supine while sleeping, but the height is 0 cm without any change. I understand. Further, according to FIG. 11, at the beginning of bedtime (from 21:00 to 23:00), the systolic blood pressure value exceeds 135 mmHg, but from 23:00 to 1 o'clock, the user changes his posture ( 2) The patient is changed to the right-side-up position, and the blood pressure value decreases as the posture changes, and the systolic blood pressure value does not exceed 135 mmHg.
Thereafter, from about 1 o'clock to about 4 o'clock, the user changes the posture to (3) the left recumbent position, and the whole blood pressure value increases with the change in posture, and the diastolic blood pressure value is about 135 mmHg. Thereafter, at about 4 o'clock, the user changes the posture to (1) the supine position again, and the blood pressure value falls at a stretch as a whole with the posture change (only immediately after the posture change, the systolic blood pressure value exceeds 135 mmHg). . At about 5 o'clock, the user changes the posture again to (2) the right lateral position, and the blood pressure value decreases slightly as a whole with the change in posture (there is a time when the diastolic blood pressure value considerably decreases).

  In FIG. 11, since there is no change in the height, it is understood that the blood pressure value varies depending on the posture of the user. At least for this user, the blood pressure value tends to increase particularly in the left lateral position. However, a physical risk (for example, a risk of cardiovascular disease, a risk of organ damage) in a time zone of 1 to 3 o'clock rather than a change due to a posture is a main cause, and hypertension may be caused.

(Heart height)
Next, a position corresponding to the height of the heart will be described.
First, how to determine the height of the heart when the user's measurement posture is sitting or standing will be described. In the sitting position or the standing position, when the sensor is mounted on the torso surface closest to the heart, such as the sensor 151, the height of the sensor 151 can be regarded as the height of the heart. When the sensor is mounted on the upper arm of the user as in the case of the sensor 152, if the sensor 152 is mounted on the upper arm so as to have the same height as the heart, the height of the sensor 152 becomes the height of the heart. It can be regarded as being.

  Next, how to determine the height of the heart when the measurement posture of the user is in the supine or prone position will be described. In the supine or prone position, the heart is half the width of the chest, which is the length from the chest to the back. That is, in this case, the height of the heart is half the width of the chest plate. Even in the prone position, the height of the heart is half the width of the chest plate. In particular, in this position, the position of the right atrium is located exactly at the midpoint of the chest plate. Since it is correct to measure the blood pressure by matching the height of the blood pressure sensor to the height of the right atrium, it is ideal to adjust the blood pressure measurement point to half the width of the chest in the supine position. is there. Therefore, when the measurement posture of the user is in the supine position or the prone position, it is sufficient to calculate the difference from the height of the blood pressure measurement unit 307, which is a blood pressure sensor, assuming that half of the user's chest width is the height of the heart.

  Next, how to determine the height of the heart when the measurement posture of the user is in the lateral position will be described. In the lateral position, the heart is at the center of the bodily sensation. That is, in this case, the height of the heart is half the trunk width. In particular, in this posture, the position of the right atrium is located exactly at the midpoint of the trunk. Further, how to determine the height of the heart when the measurement posture of the user is in the lateral position will be described. In the supine position, the heart is on the centerline of the trunk, at half the trunk width from the side of one arm to the side of the other arm. Therefore, when the measurement posture of the user is in the lateral position, it is only necessary to calculate the difference from the height of the blood pressure measurement unit 307, which is a blood pressure sensor, assuming that half of the trunk width of the user is the height of the heart.

  Since the height of the blood pressure measurement unit 307 can be calculated from the body measurement of the user and the posture angle of the sensor worn by the user, the difference between the height of the heart and the height of the blood pressure sensor is calculated by the correction unit 305. It is possible to

(Calculation of attitude angle)
Next, a method of calculating a posture angle from a sensor will be briefly described. Here, a case where a roll angle, a pitch angle, and a yaw angle, which are one expression of the Euler angle, are used as an example of a means for expressing a three-dimensional posture will be described.
The roll angle, the pitch angle, and the yaw angle are defined as angles when rotating each axis in the order of the Z axis, the Y axis, and the X axis. The angle around the X axis is a roll angle φ (phi), the angle around the Y axis is a pitch angle θ (theta), and the angle around the Z axis is a yaw angle ψ (psii). The coordinate system is a right-handed coordinate system in which the direction of the Z axis is the same as the direction of gravity, and the rotation around each axis is positive in the counterclockwise direction.

<Initial posture>
When calculating the attitude from the angular velocity obtained by the gyro sensor 226, it is necessary to measure the initial attitude. The initial attitude is calculated by the attitude calculation unit 302 acquiring the gravitational acceleration obtained from the acceleration sensor 225 and the magnetic field obtained from the geomagnetic sensor 227 via the sensor information acquisition unit 301. First, for example, the fact is presented to the user on the output device 211 so that the user is stationary, and the acceleration measured by the acceleration sensor 225 is limited to only the gravitational acceleration g. At this time, the following relational expression holds.

Here, a _x , a _y , and a _z are output values (acceleration components) of the acceleration sensor 225 with respect to the X axis, the Y axis, and the Z axis, respectively. From the equation (1), the roll angle φ _ai and the pitch angle θ _ai in the initial posture can be obtained (see the following equation (2)).

Next, the attitude calculation unit 302 acquires the magnetic field detected by the geomagnetic sensor 227 via the sensor information acquisition unit 301, and calculates the yaw angle based on the magnetic field. It is assumed that the geomagnetic sensor 227 can measure a three-axis magnetic field. Under the roll angle phi _a pitch angle theta _a geomagnetic sensor 227 is above the initial position, the magnetic field geomagnetic sensor 227 detects _{(m x, m y, m} z) gradient of the roll angle and the pitch angle from The attitude calculation unit 302 can calculate the magnetic field ( _mxc , _myc , _mzc ) in which the error caused by the error is corrected by the following equation (3).

Orientation calculation unit 302 can These corrected magnetic field using _{(m xc, m yc, m} zc) , and calculates the yaw angle [psi _M by following formula (4).

<Posture during exercise>
The posture calculation unit 302 calculates the posture angle during which the user is exercising, using the initial posture calculated by the posture calculation unit 302 according to the above equations (2) and (4) and the angular velocity obtained from the gyro sensor 226. I do. The attitude calculation unit 302 uses the relationship between the angular velocity and the roll angle, the pitch angle, and the yaw angle in the following equation (5). Equation (5) is a differential value of each of the roll angle, the pitch angle, and the yaw angle. Therefore, the attitude calculation unit 302 can obtain the attitude angle during exercise by integrating these values as in equation (6).

As described above, the posture calculation unit 302 can calculate the posture angle in the coordinate system shown in FIG. Note that the attitude calculation unit 302 can obtain a rotation matrix (R in equation (7)) in the coordinate system of FIG. 7 using equation (6). According to Expression (7), the posture calculation unit 302 can obtain the position moved at the posture angle in the coordinate system of FIG.

Further, the posture calculation unit 302 may calculate the posture angle by a method different from the method described above. For example, when the dynamic acceleration other than the gravitational acceleration is large, the posture calculation unit 302 uses a method including the effects of the centrifugal acceleration and the tangential acceleration to prevent the errors included in the angular velocity from accumulating and increasing by integration. (Sensor fusion) may be applied to calculate the posture angle.
[Action and effect]
As described above, in the blood pressure measurement device of the present embodiment, in step S601, the presentation selection unit 308 of the blood pressure measurement device 200 selects one specific display pattern from the plurality of measurement result display patterns. Appropriate blood pressure value data and a blood pressure measurement state can be displayed together based on whether or not blood pressure value data measured by the apparatus 200 is corrected and whether blood pressure is measured at the height of the heart. As a result, the blood pressure measurement state is related to the reliability of the corrected blood pressure value data, which is the original blood pressure of the user, so that the reliability of the blood pressure value data is displayed in step S605, step S609, or step S607. Can be presented.
In addition, the blood pressure measurement device of the present embodiment can measure the posture of the user by calculating the posture angle of the body part on which the sensor is mounted in step S502. In addition, in step S502, the blood pressure measurement device can acquire the height of the first blood pressure sensor that detects the blood pressure of the user from the body information of the user and the posture of the user measured in advance. Therefore, the blood pressure measurement device does not limit the user's posture at the time of blood pressure measurement, and calculates the posture angle with respect to an arbitrary posture, acquires the height of the first blood pressure sensor, and corrects the measured value of the blood pressure. be able to. In addition, in step S503, the blood pressure measurement device determines in step S503 whether the blood pressure measured in step S501 can be corrected only with the height. The correction value is determined including factors other than the above (step S506), and the user's original blood pressure value can be calculated.

  In addition, the blood pressure measurement device of the present embodiment initializes the relationship between the user's measurement posture and the correction formula of the measured blood pressure in advance (steps S401 to S460). It is possible to determine the optimal correction formula from the posture, that is, the height of the blood pressure sensor based on the heart and the posture angle of the sensor worn by the user, and correct the blood pressure in step S501 to the original blood pressure of the user. it can. Therefore, according to the blood pressure measurement device of the present embodiment, it is possible to accurately measure the user's original blood pressure regardless of the posture of the user, and to obtain the blood pressure value data before correction and the corrected blood pressure value data. The reliability of the blood pressure value data after the delay can be displayed.

[Modification]
Although the embodiments of the present invention have been described in detail above, the above description is merely an example of the present invention in every respect. It goes without saying that various improvements and modifications can be made without departing from the scope of the invention. For example, the following changes are possible. In practicing the present invention, a specific configuration according to the embodiment may be appropriately adopted. In the following, the same reference numerals are used for the same components as those in the above-described embodiment, and the same points as those in the above-described embodiment will not be described. The following modifications can be appropriately combined.

<1>
In the above embodiment, the pressing cuff 231 is installed on a wrist-type sphygmomanometer. However, the present invention is not limited to this.

<2>
In the above embodiment, the blood pressure value of the user is measured by the oscillometric method using the pressing cuff 231. However, when only measuring the blood pressure, the present invention is not limited to this. For example, a pressure pulse wave sensor that detects a pressure pulse wave for each heartbeat is provided, and a pressure pulse wave of a radial artery passing through a measurement site (for example, a left wrist) is detected to obtain a blood pressure value (a systolic blood pressure value and a diastolic blood pressure value). Value) may be measured (tonometry method). The pressure pulse wave sensor may measure a blood pressure value by detecting a pulse wave of a radial artery passing through a measurement site (for example, a left wrist) as a change in impedance (impedance method). The pressure pulse wave sensor includes a light emitting element that irradiates light toward an artery passing through a corresponding portion of the measurement site, and a light receiving element that receives reflected light (or transmitted light) of the light. A blood pressure value may be measured by detecting a pulse wave as a change in volume (photoelectric method). The pressure pulse wave sensor includes a piezoelectric sensor in contact with the measurement site, and measures a blood pressure value by detecting, as a change in electrical resistance, a strain caused by an arterial pressure passing through a corresponding portion of the measurement site. (Piezoelectric method). Further, the pressure pulse wave sensor includes a transmitting element for transmitting a radio wave (transmitting wave) toward an artery passing through a corresponding portion of the measurement site, and a receiving element for receiving a reflected wave of the radio wave. The blood pressure value may be measured by detecting a change in the distance between the artery and the sensor due to the pulse wave as a phase shift between the transmitted wave and the reflected wave (radio wave irradiation method). Note that other methods may be applied as long as a physical quantity capable of calculating a blood pressure value can be observed.

<3>
The device of the present invention can also be realized by a computer and a program, and the program can be recorded on a recording medium (or a storage medium) or can be provided through a network.
Further, each of the above devices and their device portions can be implemented with either a hardware configuration or a combination configuration of hardware resources and software. The software of the combination configuration is installed in a computer from a network or a computer-readable recording medium (or storage medium) in advance, and is executed by a processor of the computer, whereby the functions of the respective devices are realized by the computer. A program is used.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements in an implementation stage without departing from the scope of the invention. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Further, components of different embodiments may be appropriately combined.

  Further, “and / or” means any one or more of the items connected and listed by “and / or”. To give a specific example, “x and / or y” means any element of a set {(x), (y), (x, y)} composed of three elements. As another specific example, “x, y, and / or z” is a set of seven elements ｛(x), (y), (z), (x, y), (x, z ), (Y, z), (x, y, z)}.

(Note)
An acquisition unit (106, 307) for acquiring a first blood pressure value of the user;
A calculation unit (103, 104, 302, 303) for calculating a blood pressure measurement state of the user;
A presentation unit (108, 308, 309) for presenting the blood pressure measurement state and the first blood pressure value;
Blood pressure measuring device (100, 200) comprising:

Reference Signs List 100 blood pressure measurement device 101 sensor unit 102 sensor information acquisition unit 103 posture calculation unit 104 height calculation unit 105 correction unit 106 blood pressure measurement unit 107 storage unit 108 presentation unit 151, 152 sensor 200 Blood pressure measurement device 211 output device 212 input device 213 control unit 214 storage unit 215 drive 216 external interface 217 communication interface 218 power supply 219 pressure sensor 220 pump drive circuit 221 pump 222 valve 223 Timing device 225 Acceleration sensor 226 Gyro sensor 227 Geomagnetic sensor 231 Pressing cuff 241 Cuff tube 242 Flow path forming member 301 Sensor information acquisition unit 302 Attitude calculation unit 303 Height calculation unit 305 Correction unit 306 … Cuff pressure acquisition unit 307… Blood pressure measurement unit 308: presentation selection unit 309: presentation unit

Claims (18)

An acquisition unit that acquires a first blood pressure value of the user;
A calculation unit for calculating a blood pressure measurement state of the user,
A presentation unit that presents the blood pressure measurement state and the first blood pressure value;
Blood pressure measuring device comprising: Determining whether it is necessary to correct the first blood pressure value based on the blood pressure measurement state, and correcting the first blood pressure value when determining that the first blood pressure value needs to be corrected; Part further,
The presenting unit simultaneously presents the blood pressure measurement state, the corrected first blood pressure value, and the uncorrected first blood pressure value,
The blood pressure measurement device according to claim 1. The blood pressure measurement state includes posture information of the user and a height difference between the first blood pressure sensor that detects the blood pressure of the user and the heart of the user,
The blood pressure measurement device according to claim 1. An arithmetic unit that calculates a difference in height between the first blood pressure sensor that detects the blood pressure of the user and the heart of the user as a blood pressure measurement state;
A first blood pressure value acquired when the height difference is larger than a certain range, and a first blood pressure value acquired when the height difference is within the range, and a presentation unit for presenting the first blood pressure value differently,
Further comprising,
The blood pressure measurement device according to claim 1. The presenting unit presents the first blood pressure value in a different color depending on whether it is within the range, and / or presents the first blood pressure value with a different flag depending on whether it is within the range,
The blood pressure measurement device according to claim 4. An arithmetic unit that calculates a difference in height between the first blood pressure sensor that detects the blood pressure of the user and the heart of the user as a blood pressure measurement state;
A presentation unit that presents only the first blood pressure value acquired when the height difference is within a certain range;
Further comprising,
The blood pressure measurement device according to claim 1. An arithmetic unit that calculates the user's posture information as a blood pressure measurement state,
A presentation unit that presents the posture information when the first blood pressure value is detected, together with the first blood pressure value;
Further comprising,
The blood pressure measurement device according to claim 1. The presenting unit, based on the posture information, presents a blood pressure value for each posture of the user,
The blood pressure measurement device according to claim 7.   The blood pressure measurement device according to claim 1, wherein the calculation unit acquires the blood pressure measurement state from sensor information from one or more sensors worn by the user.   The correction unit includes information on sleeping and other than sleeping, includes information on the supine position, prone position, and lateral position when sleeping, and a blood pressure measurement state including information on the standing position and sitting position other than when sleeping. The blood pressure measurement device according to claim 2, wherein the first blood pressure value is corrected based on the first blood pressure value.   The correction unit, whether the user is in a standing position, a sitting position, or a lying position, a state in which a joint between the first blood pressure sensor that detects the blood pressure of the user and the heart is bent, and The first blood pressure value is corrected based on a first correction formula determined from posture information including a posture angle of the body part of the user and a height difference between the first blood pressure sensor and the user's heart. The blood pressure measurement device according to claim 2.   The correction unit determines whether correction is possible only with the difference based on the posture information. If the correction is not possible only with the difference, the first blood pressure is determined by a second correction formula corresponding to the posture information. The blood pressure measurement device according to claim 11, wherein the value is corrected.   The correction unit corrects the first blood pressure value by using the second correction formula in which a correction value corresponding to the posture information is added to the first correction formula when correction is not possible only with the difference. The blood pressure measurement device according to claim 1. The second blood pressure sensor is arranged at a position different from the first blood pressure sensor for detecting the blood pressure of the user and at the same height as the heart, and the second blood pressure value is measured a plurality of times to determine the fluctuation range of the second blood pressure value. A first measuring unit to perform
While maintaining the second blood pressure sensor at the same height as the heart, the first blood pressure sensor adjusts a first blood pressure value to a first height, which is a difference between the height of the first blood pressure sensor and the second blood pressure sensor. A second measuring unit for measuring the
If the third blood pressure value calculated from the first blood pressure value and the first height is equal to the second blood pressure value within the fluctuation range, it is determined that correction can be made only with the height, and the third blood pressure value is determined. When the blood pressure value is not equal to the second blood pressure value within the fluctuation range, a determination unit that determines that correction is impossible only with the height,
If it is determined that the correction is possible only with the height, the first correction formula determined only by the height and the corresponding posture information are registered, and if it is determined that the correction is impossible only with the height, A second correction formula obtained by adding a correction value calculated based on a difference between the third blood pressure value in consideration of the fluctuation range and the second blood pressure value to the first correction formula, and corresponding posture information are registered. Registration department,
The blood pressure measurement device according to any one of claims 1 to 13, further comprising:   The second measurement unit, the determination unit, and the registration unit are located between the first blood pressure sensor and the heart when the joint between the first blood pressure sensor and the heart is bent. The blood pressure measurement device according to claim 14, wherein the processing is performed in a posture when the joint is not bent.   The registration unit, the user is standing, sitting, and information on which of the state of lying, and information on whether the joint between the first blood pressure sensor and the heart is bent, The blood pressure measurement device according to claim 14, wherein the posture information and the posture angle of the body part of the user are included in the posture information and registered. Get the user's blood pressure value,
Calculating the blood pressure measurement state of the user,
Presenting the blood pressure measurement state and the blood pressure value,
Blood pressure measurement method comprising:   A program for causing a computer to function as each unit included in the blood pressure measurement device according to any one of claims 1 to 16.