WO2011105195A1

WO2011105195A1 - Blood pressure information measurement device, and method for determining attachment state of cuff for blood pressure information measurement device

Info

Publication number: WO2011105195A1
Application number: PCT/JP2011/052388
Authority: WO
Inventors: 達矢小林; 秀輝吉田; 健司藤井
Original assignee: オムロンヘルスケア株式会社
Priority date: 2010-02-26
Filing date: 2011-02-04
Publication date: 2011-09-01
Also published as: JP2011177249A

Abstract

Disclosed is a blood pressure information measurement device (1A) provided with: a pulse measurement air bag (23) to be wrapped around a predetermined location on the upper arm; a blood pressure value air bag (24) to be wrapped around a position which includes a more distal part of the upper arm to the abovementioned predetermined location; a pressure sensor (33A) which detects the internal pressure of the pulse measurement air bag (23); a pressure sensor (33B) which detects the internal pressure of the blood pressure value measurement air bag (24); a CPU (40) which acts as a control unit; and a display unit (42) and buzzer (44) which notify erroneous attachment. When the CPU (40) detects, on the basis of the pressure information detected by the pressure sensor (33A) and the pressure information detected by the other pressure sensor (33B), that the blood pressure value measurement air bag (24) is not wrapped around a position which includes a more distal part of the upper arm, the CPU (40) notifies the test subject and others by means of the display unit (42) and the buzzer (44).

Description

Blood pressure information measuring device and method for determining wearing state of cuff for blood pressure information measuring device

The present invention relates to a blood pressure information measuring device that acquires blood pressure information by attaching a cuff provided with a fluid bag to the body, and particularly relates to a blood pressure information measuring device configured to be able to acquire a pulse wave as blood pressure information. .

The present invention also relates to a wearing state discriminating method for discriminating a wearing state of a cuff to be worn on the blood pressure information measuring device.

It is very important to acquire the blood pressure information of the subject in order to know the health status of the subject. In recent years, the systolic blood pressure value (hereinafter referred to as “maximum blood pressure”), the diastolic blood pressure value (hereinafter referred to as “minimum blood pressure”), etc., which have been widely recognized as useful indicators for health care, have been acquired. Without being limited, attempts have been made to capture the cardiac load, the degree of arteriosclerosis, etc. by acquiring the pulse wave of the subject. The blood pressure information measuring device is a device for obtaining indexes for health management based on the acquired blood pressure information, and is expected to be further utilized in the fields of early detection, prevention, treatment, etc. of cardiovascular diseases. Yes. The blood pressure information widely includes various information on the circulatory system such as systolic blood pressure value, diastolic blood pressure value, average blood pressure value, pulse wave, pulse, and various indexes indicating arteriosclerosis.

Generally, a cuff is used for measuring blood pressure information. Here, the cuff means a band-like or annular structure including a fluid bag having a lumen, which can be wound around a part of the body, and fluid such as gas or liquid is injected into the lumen. This means that the fluid bag is inflated and contracted to be used for measuring blood pressure information. In particular, the cuff used by being wound around the arm is also called an armband or a manchette.

Conventionally, as a blood pressure information measuring device configured to be able to acquire an index indicating the degree of arteriosclerosis, the propagation velocity of a pulse wave ejected from the heart (hereinafter, PWV: Pulse Wave Velocity) causes arteriosclerosis to progress. It is known that an index indicating the degree of arteriosclerosis is acquired based on the measured PWV by utilizing the fact that it becomes faster.

One of them is to attach cuffs and sensors to two or more parts to be measured selected from the extremities and neck, etc., acquire pulse waves simultaneously with the attached cuffs and sensors, and the appearance of the acquired pulse waves There is known a blood pressure information measuring apparatus configured to measure PWV based on a time difference and an arterial length between measured sites and acquire an index indicating the degree of arteriosclerosis based on the measured PWV.

Typical examples of PWV measured by the blood pressure information measuring apparatus described above include baPWV (brachial-ankle Pulse Wave Velocity) and cfPWV (carotid-femoral Pulse Wave Velocity). The baPWV is a PWV measured by selecting an upper arm and an ankle as a measurement site, and as a blood pressure information measurement device configured to be able to acquire an index indicating the degree of arteriosclerosis based on the baPWV, For example, there is one disclosed in Japanese Patent Laid-Open No. 2000-316821. The cfPWV is a PWV measured by selecting the neck and the thigh as the measurement site.

However, in the blood pressure information measurement apparatus that measures baPWV and cfPWV as described above and obtains an index indicating the degree of arteriosclerosis based on these, a cuff or a sensor is attached to a plurality of parts of the body and the PWV Since it is necessary to perform measurement, there are problems that the apparatus becomes relatively large and that the apparatus configuration becomes relatively complicated. Therefore, even though these blood pressure information measuring devices can be used in medical institutions and the like, it is difficult to say that they can be used in general households.

Therefore, it is configured to measure the PWV by attaching cuffs to different positions of the upper arm and to obtain an index indicating the degree of arteriosclerosis based on the measured PWV so that the device can be configured in a small size. A blood pressure information measuring apparatus is disclosed in Japanese Patent Application Laid-Open No. 2004-113593.

In the blood pressure information measuring device disclosed in Japanese Patent Application Laid-Open No. 2004-113593, cuffs are respectively attached to different positions of the upper arm, and a blood cuff for ischemia is contained in the cuff attached to the distal side, A pulse wave measurement air bag is included in the attached cuff, and a pulse wave is detected using the pulse wave measurement air bag in a state in which the artery is blocked using the ischemic air bag, and is included in the detected pulse wave PWV is measured based on the time difference at which the peak value of the ejected wave component and the peak value of the reflected wave component appear, and the arterial length between different positions of the upper arm where the cuff is attached, and the measured PWV Based on this, an index indicating the degree of arteriosclerosis is acquired. Here, the ejection wave is a pulse wave propagated from the central side to the artery of the portion where the pulse wave measurement air bag is attached, and the reflected wave is the ejection wave. It is a pulse wave that is reflected from the portion where the bag is attached and propagates from the peripheral side to the artery of the portion where the air bag for pulse wave measurement is attached.

However, even in the blood pressure information measuring device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2004-113593, it is still necessary to attach two cuffs, so it cannot be said that sufficient downsizing is achieved. Miniaturization is still necessary for use in general households.

Therefore, a blood pressure information measuring device configured to measure a PWV by attaching a single cuff to the upper arm so that it can be used in a general home, and to obtain an index indicating the degree of arteriosclerosis based on the measured PWV Is disclosed in Japanese Patent Application Laid-Open No. 2007-043362.

In the blood pressure information measuring device disclosed in Japanese Patent Application Laid-Open No. 2007-043362, one large-capacity blood pressure value measuring air bag and two small-capacity pulse wave measuring air bags are attached to the cuff wound around the upper arm. In the mounted state, one of the pulse wave measurement air bags is arranged more centrally than the blood pressure value measurement air bag, and the other pulse wave measurement air bag is the blood pressure value measurement air bag. The blood pressure value is measured using the air bag for measuring blood pressure value, and the difference in the appearance time of the pulse wave detected using the two air bags for measuring pulse wave, The PWV is measured based on the distance between the two pulse wave measurement bladders, and an index indicating the degree of arteriosclerosis is acquired based on the measured PWV.

However, in the blood pressure information measuring device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2007-043362, a pulse is obtained using the two pulse wave measurement air bags without blocking the artery contained in the cuff wearing site. Because it is configured to detect the wave, the reflected wave from the artery located on the distal side of the wearing site will be superimposed on the detected pulse wave, and it is difficult to properly separate the reflected wave Therefore, there is a problem that the measurement accuracy of PWV is greatly reduced. Therefore, in the case of the blood pressure information measuring device as disclosed in the above Japanese Patent Application Laid-Open No. 2007-044362, it is difficult to increase the accuracy of the acquired index indicating the degree of arteriosclerosis.

All the problems described above have been solved, the device has been downsized to such an extent that it can be used even in ordinary homes, and PWV can be measured with high accuracy. As a result, the degree of arteriosclerosis can be measured with high accuracy. Examples of the blood pressure information measuring apparatus configured to be able to acquire the indicated index are disclosed in Japanese Unexamined Patent Application Publication Nos. 2009-284965 and 2009-284966.

In the blood pressure information measuring device disclosed in the above Japanese Patent Application Laid-Open Nos. 2009-284965 and 2009-284966, a single cuff is attached to the upper arm, and one large-capacity blood pressure value measurement is performed on the cuff. An air bag and one small-capacity air bag for pulse wave measurement are included, and the air bag for measuring pulse wave is arranged on the center side of the wearing part in the mounted state, and the air bag for measuring blood pressure value The blood pressure value is measured with a blood pressure value measuring air bag so that the blood pressure value is measured and the artery is blocked using the blood pressure value measuring air bag. The pulse wave is detected using an air bag, the time difference between the peak value of the ejection wave component and the peak value of the reflected wave component included in the detected pulse wave, and the heart (more specifically, the subclavian artery Between the bifurcation) and the iliac bifurcation Based on the pulse length measured PWV, index indicating the degree of arteriosclerosis based on the measured PWV it is configured to be acquired. Here, the ejection wave is a pulse wave that is directly propagated from the heart to the artery of the portion where the air bag for measuring the pulse wave is attached, and the reflected wave is a branch wave of the iliac artery. It is a pulse wave that is reflected at the part and propagates to the artery of the part to which the air bag for pulse wave measurement is attached.

In the blood pressure information measuring device disclosed in Japanese Patent Application Laid-Open No. 2009-284965 and Japanese Patent Application Laid-Open No. 2009-284966, a single cuff is attached to the upper arm, and one blood pressure value is measured in the single cuff. Therefore, the apparatus can be reduced in size as compared with the conventional one, and the blood pressure measurement air bag is a cuff for blocking the artery. Therefore, the pulse wave can be measured with the peripheral side blocked, and the reflected wave from the artery located on the distal side of the site to be worn is superimposed on the detected pulse wave. It is possible to measure PWV with high accuracy without fear. Further, in the blood pressure information measuring device disclosed in the above Japanese Patent Application Laid-Open Nos. 2009-284965 and 2009-284966, the blood pressure value measuring air bag and the pulse wave measuring air bag are simultaneously or selectively used. It is possible to employ a configuration in which pressurization is performed using a single pressurizing pump. With such a configuration, further downsizing of the device and simplification of the device configuration can be achieved.

Therefore, if the blood pressure information measuring device as disclosed in the above Japanese Patent Application Laid-Open Nos. 2009-284965 and 2009-284966 is used, the device can be downsized and the device configuration can be simplified to the extent that it can be used in general households. Therefore, the blood pressure information measuring apparatus can be configured to be able to measure PWV with high accuracy, and as a result, to acquire an index indicating the degree of arteriosclerosis with high accuracy.

In addition, in JP 2009-284965 A and JP 2009-284966 A, in addition to acquiring the index indicating the degree of arteriosclerosis based on the PWV, the ejection wave included in the detected pulse wave is described. It is described that an index indicating the degree of arteriosclerosis can be acquired based on the difference or ratio between the amplitude of the component and the amplitude of the reflected wave component.

Further, in addition to the above-mentioned JP-A-2009-284965 and JP-A-2009-284966, JP-A-2004-195071 and JP-T 2007-522857 have different compression forces when compressing an artery. Therefore, the pressure applied to the artery when detecting the pulse wave is set to a pressure higher than the maximum blood pressure, and various types of pulse waves are detected based on the pulse wave detected in this state. It is described that it is preferable to perform pulse wave analysis.

JP 2000-316821 A JP 2004-113593 A JP 2007-043362 A JP 2009-284965 A JP 2009-284966 A JP 2004-195071 A Special table 2007-522857

However, even in the case of the blood pressure information measuring device as disclosed in the above-mentioned Japanese Patent Application Laid-Open Nos. 2009-284965 and 2009-284966, when the cuff is incorrectly attached (that is, the attachment site) When the air bag for measuring the pulse wave is wound around the peripheral side of the blood pressure and the air bag for measuring the blood pressure value is attached to the central side of the wearing part), there is a problem that the pulse wave cannot be acquired correctly. This problem can also occur when the pulse wave measurement air bag and the blood pressure value measurement air bag are provided in different cuffs by misplacement of the mounting positions of these cuffs.

Here, usually, a measurement time of several tens of seconds to several minutes is required for pulse wave measurement. Therefore, if there is an incorrect wearing as described above, the ischemic state will be maintained during the measurement operation even though the pulse wave cannot be measured correctly, causing pain to the subject. Will end up.

Accordingly, the present invention has been made to solve the above-described problems, and provides a blood pressure information measuring device configured to recognize erroneous mounting and thereby perform pulse wave measurement correctly. With the goal.

In addition, the present invention provides a method for determining a wearing state of a cuff for a blood pressure information measuring device, which makes it possible to determine whether or not the cuff provided in the blood pressure information measuring device is correctly attached to a wearing site. For the purpose.

A blood pressure information measurement device according to the present invention includes a first fluid bag, a second fluid bag, a first pressure detection unit, a second pressure detection unit, a pressure increasing / decreasing mechanism, a control unit, and a pulse wave acquisition unit. And a determination unit. The first fluid bag is to be wound around a predetermined position of any limb selected from the four limbs. The second fluid bag is to be wound around a position including a portion of the selected limb that is more distal than the predetermined position. The first pressure detection unit detects an internal pressure of the first fluid bag. The second pressure detection unit detects an internal pressure of the second fluid bag. The pressure increasing / decreasing mechanism pressurizes and depressurizes the first fluid bag and the second fluid bag. The control unit controls driving of the pressure increasing / decreasing mechanism. The pulse wave acquisition unit acquires a pulse wave based on the pressure information detected by the first pressure detection unit. The determination unit is located more distal than the predetermined position of the selected limb based on the pressure information detected by the first pressure detection unit and the pressure information detected by the second pressure detection unit. It is determined whether or not the second fluid bag is wound around a position including the portion.

In the blood pressure information measurement device according to the present invention, the determination unit pressurizes the first fluid bag and the second fluid bag above the maximum blood pressure using the pressure increasing / decreasing mechanism. By comparing the amplitude of the internal pressure fluctuation of the first fluid bag detected by the one pressure detection unit with a predetermined value, the first position of the selected limb is included at a position including a portion on the distal side of the predetermined position. It may be determined whether or not the two-fluid bag is wound.

In the blood pressure information measurement device according to the present invention, in the process in which the determination unit pressurizes the first fluid bag and the second fluid bag using the pressure increasing / decreasing mechanism, the first pressure detecting unit A ratio between the amplitude of the amplitude component included in the detected internal pressure variation of the first fluid bag and the amplitude of the amplitude component included in the variation of the internal pressure of the second fluid bag detected by the second pressure detection unit, By comparing with a predetermined value, it may be determined whether or not the second fluid bag is wound around a position including a portion on the distal side of the selected position of the selected limb body.

In the blood pressure information measurement device according to the present invention, in the process in which the determination unit pressurizes the first fluid bag and the second fluid bag using the pressure increasing / decreasing mechanism, the first pressure detecting unit The cross-correlation between the detected internal pressure fluctuation of the first fluid bag and the internal pressure fluctuation of the second fluid bag detected by the second pressure detector is calculated, and the calculated cross-correlation is compared with a predetermined value. By doing so, it may be determined whether or not the second fluid bag is wound around a position that includes a portion of the selected limb that includes a portion closer to the distal side than the predetermined position.

In the blood pressure information measurement device according to the present invention, the control unit causes the second fluid bag to be wound around the position where the determination unit includes a portion of the selected limb that is more distal than the predetermined position. It is preferable to control the driving of the pressure increasing / decreasing mechanism so that the first fluid bag and the second fluid bag are immediately depressurized when it is determined that they are not.

When the blood pressure information measurement device according to the present invention further determines that the second fluid bag is not wrapped around a position including a portion of the selected limb that is more distal than the predetermined position of the selected limb. In addition, it is preferable that a notifying unit for notifying this is provided.

It is preferable that the blood pressure information measurement device according to the present invention further includes a blood pressure value acquisition unit that acquires a blood pressure value based on the pressure information detected by the second pressure detection unit.

In the blood pressure information measuring device according to the present invention, it is preferable that the first fluid bag and the second fluid bag are provided in a single cuff. In that case, the second fluid bag may cover the outer side of the first fluid bag so that the second fluid bag is wound over substantially the entire attachment site in the attached state of the cuff. The second fluid bag is wound around the first fluid bag along the axial direction of the cuff so that the second fluid bag is wound only on a portion other than the central side of the attachment site in the attached state of the cuff. They may be arranged side by side.

The blood pressure information measuring device according to the present invention preferably further includes an index calculation unit that calculates an index indicating the degree of arteriosclerosis based on the pulse wave acquired by the pulse wave acquisition unit.

The method for determining the wearing state of the cuff for a blood pressure information measuring device according to the present invention includes a first fluid bag to be wound around a predetermined position of any one of the limbs, and the predetermined position of the selected limb. And a second fluid bag to be wound around a position including a portion on the more distal side than the distal end of the blood pressure information measuring device cuff, wherein the inner pressure of the first fluid bag and the second fluid bag are A step of detecting an internal pressure, respectively, and whether or not the second fluid bag is wound around a position including a portion on the distal side of the predetermined position of the selected limb based on the detected pressure information. A step of judging.

According to the present invention, it is possible to provide a blood pressure information measuring device configured to recognize erroneous mounting and thereby to correctly perform pulse wave measurement.

In addition, according to the present invention, there is provided a method for determining a wearing state of a cuff for a blood pressure information measuring device that makes it possible to determine whether or not the cuff provided in the blood pressure information measuring device is correctly attached to a wearing site. Can be realized.

It is a perspective view which shows the external appearance structure of the blood-pressure information measuring apparatus in Embodiment 1 of this invention. It is an expanded view at the time of seeing the cuff shown in FIG. 1 from the outer peripheral surface side. It is sectional drawing at the time of cut | disconnecting the cuff shown in FIG. 1 along the plane orthogonal to an axial direction. It is sectional drawing at the time of cut | disconnecting the cuff shown in FIG. 1 along the plane parallel to an axial direction. It is a figure which shows the structure of the functional block of the blood-pressure information measuring apparatus in Embodiment 1 of this invention. It is a flowchart which shows the measurement operation | movement of the blood-pressure information measuring apparatus in Embodiment 1 of this invention. It is a schematic diagram which shows the mounting state which mounted | wore the upper arm correctly with the cuff shown in FIG. 6 is a graph showing pressure changes in a pulse wave measurement air bag and a blood pressure value measurement air bag during a measurement operation when the cuff is correctly worn in the blood pressure information measurement device according to the first embodiment of the present invention. 6 is a graph showing pressure changes in a pulse wave measurement air bag and a blood pressure value measurement air bag during a measurement operation when a cuff is erroneously attached in the blood pressure information measurement device according to the first embodiment of the present invention. It is a figure which shows the structure of the functional block of the blood-pressure information measuring apparatus which concerns on the 1st modification based on Embodiment 1 of this invention. It is a figure which shows the structure of the functional block of the blood-pressure information measuring apparatus which concerns on the 2nd modification based on Embodiment 1 of this invention. It is an expanded view at the time of seeing the cuff of the blood-pressure information measuring apparatus which concerns on the 3rd modification based on Embodiment 1 of this invention from the outer peripheral surface side. It is a flowchart which shows the measurement operation | movement of the blood-pressure information measuring apparatus in Embodiment 2 of this invention. In the blood pressure information measurement device according to the second embodiment of the present invention, it is a graph showing the fluctuation of the amplitude of the pressure change of the pulse wave measurement air bag and the blood pressure value measurement air bag during the measurement operation when the cuff is correctly attached. . In the blood pressure information measurement device according to the second embodiment of the present invention, it is a graph showing the fluctuation of the amplitude of the pressure change of the pulse wave measurement air bag and blood pressure value measurement air bag during the measurement operation when the cuff is erroneously attached. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment described below, as a blood pressure information measurement device, a function for acquiring and displaying blood pressure values such as the highest blood pressure and the lowest blood pressure, and an index indicating the degree of arteriosclerosis by detecting a pulse wave are obtained. A blood pressure information measuring device having a function of displaying the information will be described as an example. In the following embodiments, the same or corresponding parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a perspective view showing an external structure of a blood pressure information measurement device according to Embodiment 1 of the present invention, and FIG. 2 is a development view when the cuff shown in FIG. 1 is viewed from the outer peripheral surface side. 3 is a cross-sectional view of the cuff shown in FIG. 1 cut along a plane orthogonal to the axial direction. FIG. 4 shows the cuff shown in FIG. 1 cut along a plane parallel to the axial direction. FIG. Here, the cross section shown in FIG. 3 is a cross section in a portion not including a pulse wave measurement air bag to be described later. First, with reference to these FIG. 1 thru | or FIG. 4, the structure of the blood pressure information measuring device 1A in this Embodiment is demonstrated.

As shown in FIG. 1, the blood pressure information measurement device 1 </ b> A according to the present embodiment includes a main body 10, a cuff 20, and an air tube 70. The main body 10 has a box-shaped casing 11, and a display unit 42 and an operation unit 43 are provided on the upper surface thereof. The main body 10 is used by being placed on a placement surface such as a table at the time of measurement. The cuff 20 has a belt-like form that can be wound around the upper arm as a wearing part, and is covered with an exterior cover 21 as an exterior body. The cuff 20 is worn and used by being wound around the upper arm during measurement. The air tube 70 connects the main body 10 and the cuff 20 that are separated from each other, and is formed of a flexible multi-tube including two air flow paths therein.

As shown in FIGS. 2 to 4, the cuff 20 includes the above-described exterior cover 21, a small-capacity pulse wave measurement air bag 23 as a first fluid bag, and a large-capacity blood pressure value as a second fluid bag. The measurement air bag 24, a curler 26 as a curved elastic plate, and a cushion material 28 as a vibration blocking member are mainly provided.

As shown in FIGS. 1, 3, and 4, the exterior cover 21 includes an inner cover 21 a that contacts the surface of the upper arm in the mounted state, and an outer cover 21 b that is positioned on the outermost side in the mounted state. Are formed in a bag shape by joining the peripheral edges thereof (for example, sewing or welding). In the internal space of the exterior cover 21, a pulse wave measurement air bag 23, a cushion material 28, a blood pressure value measurement air bag 24, and a curler 26 are stacked and accommodated in this order from the inside.

As shown in FIGS. 1 to 3,

surface fasteners

29A and 29B are provided on the outer peripheral surface near the one end in the longitudinal direction and the inner peripheral surface near the other end of the exterior cover 21, respectively. Here, the hook and loop fastener 29A is made of, for example, a hook fastener, and the hook and loop fastener 29B is made of, for example, a loop fastener. These hook-and-

loop fasteners

29A and 29B are locked when the outer cover 21 is wound around the upper arm and the portion near the one end and the portion near the other end of the outer cover 21 are overlapped on the surface of the upper arm. . As a result, the cuff 20 is fixedly attached to the upper arm. That is, the hook and

loop fasteners

29A and 29B correspond to locking portions when the cuff 20 is attached to the upper arm.

Among the outer covers 21, the inner cover 21a is sufficiently expanded and contracted so that the compression force applied to the upper arm by the inflation of the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 is not hindered by the inner cover 21a. A member rich in properties is preferably used. On the other hand, as the outer cover 21b in the outer cover 21, a member having less stretchability than the inner cover 21a is used. From such a viewpoint, as the exterior cover 21, a fabric made of synthetic fibers such as polyamide (PA) and polyester capable of adjusting the size of stretchability relatively easily is used.

As shown in FIG. 4, the pulse wave measurement air bag 23 is preferably made of a bag-shaped member formed using a resin sheet, and an inner peripheral portion 23 a that is positioned inside in the mounted state; It has the outer peripheral part 23b which will be located outside in a mounting state, and the lumen | bore 23c prescribed | regulated by these inner peripheral part 23a and the outer peripheral part 23b. As the air bag 23 for measuring pulse waves, for example, one formed in a bag shape by overlapping two resin sheets and welding the peripheral edges thereof can be used. The lumen 23c of the pulse wave measurement air bladder 23 is connected to a pressurization pump 31A and an exhaust valve 32A (see FIG. 5), which will be described later, through one air flow path of the air tube 70 described above. The pressure is increased or decreased by the pressure pump 31A and the exhaust valve 32A. In order to optimize the compression force applied to the upper arm, the pulse wave measurement air bladder 23 may be one in which a ridge is formed on the side portion in the width direction.

As shown in FIGS. 3 and 4, the blood pressure value measuring air bag 24 is preferably made of a bag-like member formed using a resin sheet and is located on the inner side in the mounted state. 24a, the outer peripheral part 24b which will be located outside in the mounting state, and the inner cavity part 24a and the inner cavity 24c defined by the outer peripheral part 24b. As the blood pressure value measuring air bag 24, for example, a bag formed by stacking two resin sheets and welding their peripheral edges can be used. The lumen 24c of the blood pressure value measurement air bladder 24 is connected to a pressurization pump 31B and an exhaust valve 32B (see FIG. 5), which will be described later, via the other air flow path of the air tube 70 described above. The pressure is increased or decreased by the pressure pump 31B and the exhaust valve 32B. In addition, in order to optimize the compression force applied to the upper arm, the blood pressure value measuring air bladder 24 may be one in which a heel is formed on the side portion in the width direction.

As the material of the resin sheet constituting the pulse wave measurement air bag 23 and the blood pressure value measurement air bag 24, any material can be used as long as it is rich in elasticity and does not leak from the lumen after welding. Anything can be used. From this point of view, suitable materials for the resin sheet include ethylene-vinyl acetate copolymer (EVA), soft vinyl chloride (PVC), polyurethane (PU), polyamide (PA), and raw rubber.

2 and 4, the blood pressure value measurement air bladder 24 is disposed so as to be positioned substantially over the entire width direction of the cuff 20. On the other hand, the pulse wave measurement air bladder 23 is disposed so as to be located only on one end side in the width direction of the cuff 20. Here, the one end portion in the width direction of the cuff 20 on the side where the pulse wave measurement air bladder 23 is disposed is an end portion disposed on the central side in the mounted state, and therefore the pulse wave measurement air bladder 23 is In the wearing state, it is wound only on the central side of the upper arm, which is the wearing part. On the other hand, the blood pressure value measuring air bladder 24 is wound over the entire region including the central side and the peripheral side of the upper arm, which is the attachment site in the attached state. Here, the air bag 23 for measuring the pulse wave is disposed so as to be superimposed on the air bag 24 for measuring the blood pressure value so as to be positioned inside the air bag 24 for measuring the blood pressure value in the mounted state. The air bag 24 also covers the outside of the pulse wave measurement air bag 23 on the one end side in the width direction of the cuff 20.

The pulse wave measurement air bag 23 preferably has a smaller capacity than the blood pressure value measurement air bag 24, and more preferably, the pulse wave measurement air bag 23 has an air capacity of the blood pressure value measurement air bag 24. The air capacity is 1/5 or less. As an example, the size of the pulse wave measurement air bladder 23 is about 20 mm × 200 mm, and the blood pressure value measurement air bladder 24 is about 90 mm to 105 mm × 200 mm.

As shown in FIG. 4, the cushion material 28 is disposed between the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 that are arranged in a superimposed manner. The cushion material 28 is for preventing vibrations generated in the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 from being transmitted to each other. For example, a sponge member such as a urethane sheet is preferably used. Is done. The size of the cushion material 28 is the same size as the pulse wave measurement air bladder 23 or slightly larger than the pulse wave measurement air bladder 23.

As shown in FIGS. 3 and 4, the curler 26 is formed of a flexible member configured to be elastically deformable in the radial direction by being wound in an annular shape, and extends along the axial direction at a predetermined position in the circumferential direction. It has a cut that extends. Due to the cut, the curler 26 is elastically deformed so as to expand and contract in the radial direction when an external force is applied. That is, when the external force is applied, the curler 26 is deformed in the radial direction, but when the external force is no longer applied, the curler 26 is restored to the original state. Thus, the curler 26 is configured to follow the upper arm by maintaining its own annular form. Further, the blood pressure value measuring air bladder 24 is bonded and fixed to the inner peripheral surface of the curler 26 via an adhesive member such as a double-sided tape (not shown). The curler 26 is intended to make it easier for the subject himself to wear the cuff 20 on the upper arm, and when the cuff 20 is worn on the upper arm, the blood pressure value measuring air bag 24 and the pulse wave measuring air bag 23 are placed on the upper arm. It is for energizing towards the side. The curler 26 is formed of a resin member such as polypropylene (PP) so as to exhibit a sufficient elastic force.

FIG. 5 is a diagram showing a functional block configuration of the blood pressure information measurement device according to the present embodiment. Next, with reference to FIG. 5, the structure of the functional block of the blood pressure information measurement device 1A in the present embodiment will be described.

As shown in FIG. 5, the blood pressure information measurement device 1 </ b> A according to the present embodiment includes a first pressure in addition to the above-described pulse wave measurement air bag 23, blood pressure value measurement air bag 24, display unit 42, and operation unit 43. Pressure sensor 33A as a detection unit, pressure sensor 33B as a second pressure detection unit, pressurization pumps 31A and 31B and

exhaust valves

32A and 32B as pressure increase / decrease mechanisms 30A and 30B, and a CPU (Central Processing Unit) as a control unit 40, a memory unit 41 as a storage means, and a buzzer 44.

The pressurizing pump 31A and the exhaust valve 32A as the pressurizing / depressurizing mechanism 30A are for pressurizing and depressurizing the air bag 23 for pulse wave measurement. The driving of the pressurizing pump 31A is controlled by the pressurizing pump driving circuit 36A that has received a command from the CPU 40, and the pulse wave measuring air bag 23 is added by introducing compressed air into the pulse wave measuring air bag 23. Press. The driving of the exhaust valve 32A is controlled by an exhaust valve drive circuit 37A that receives a command from the CPU 40, maintains the internal pressure of the pulse wave measurement air bladder 23 in the closed state, and the pulse wave measurement air bladder 23 in the open state. The air bag 23 for pulse wave measurement is decompressed by discharging the air inside.

The pressure sensor 33A is for detecting the internal pressure of the pulse wave measurement air bladder 23. The pressure sensor 33A detects the internal pressure of the pulse wave measurement air bladder 23 and outputs a signal corresponding to the detected internal pressure to the amplifier 38A. The amplifier 38A amplifies the signal input from the pressure sensor 33A and outputs the amplified signal to an A / D (Analog / Digital) converter 39A. The A / D converter 39A converts the amplified signal input from the amplifier 38A from an analog signal to a digital signal, and outputs the converted digital signal to the CPU 40.

The pressurizing pump 31B and the exhaust valve 32B as the pressurizing / depressurizing mechanism 30B are for boosting and depressurizing the blood pressure value measuring air bladder 24. The pressurization pump 31B is driven by a pressurization pump drive circuit 36B that receives a command from the CPU 40, and introduces compressed air into the blood pressure value measurement air bladder 24 to add the blood pressure value measurement air bladder 24. Press. The exhaust valve 32B is driven by an exhaust valve drive circuit 37B that has received a command from the CPU 40, and maintains the internal pressure of the blood pressure value measurement air bladder 24 in the closed state, and the blood pressure value measurement air bladder 24 in the open state. The air bag 24 for measuring blood pressure values is decompressed by discharging the air inside.

The pressure sensor 33B is for detecting the internal pressure of the blood pressure value measurement air bladder 24. The pressure sensor 33B detects the internal pressure of the blood pressure value measurement air bladder 24 and outputs a signal corresponding to the detected internal pressure to the amplifier 38B. The amplifier 38B amplifies the signal input from the pressure sensor 33B, and outputs the amplified signal to the A / D converter 39B. The A / D converter 39B converts the amplified signal input from the amplifier 38B from an analog signal to a digital signal, and outputs the converted digital signal to the CPU 40.

The operation unit 43 is for accepting a user's operation and outputting it to the CPU 40, and is constituted by a push button, for example. The display unit 42 displays the operating state of the blood pressure information measurement device 1A, and displays information such as the measurement result of the blood pressure value and the measurement result of the index indicating the degree of arteriosclerosis output from the CPU 40 after the measurement. For example, it is composed of LCD (Liquid Crystal Display). In addition, the display unit 42 also functions as a notification unit that displays a warning mark or the like when the cuff 20 is not correctly worn on the upper arm.

The memory unit 41 is for storing a program executed by the CPU 40 and for storing information such as the above measurement results. For example, RAM (Random-Access Memory), ROM (Read-Only Memory), etc. Consists of. The buzzer 44 functions as a notification unit that notifies a warning sound or the like when the cuff 20 is not properly worn on the upper arm.

The CPU 40 controls the entire operation of the blood pressure information measurement device 1A, and receives input from the operation unit 43 and the memory unit 41, and outputs various information to the display unit 42 and the memory unit 41. . Further, the CPU 40 accepts input of pressure information detected by the

pressure sensors

33A and 33B, generates signals for driving the pressure pumps 31A and 31B and the

exhaust valves

32A and 32B, and outputs them. To do.

Further, the CPU 40 functions as a blood pressure value acquisition unit that calculates and acquires a blood pressure value based on the pressure information input from the pressure sensor 33B, and generates a pulse wave based on the pressure information input from the pressure sensor 33A. It functions as a pulse wave acquisition unit that detects and acquires. In addition, the CPU 40 also functions as an index calculation unit that calculates an index indicating the degree of arteriosclerosis based on the acquired pulse wave.

Here, as a specific method of calculating the blood pressure value by the CPU 40, a known oscillometric blood pressure value calculation method or the like can be applied, and therefore the description thereof is omitted here. Moreover, as a specific method for calculating an index indicating the degree of arteriosclerosis in the CPU 40, a method for calculating based on Tr (traveling time to reflected wave: ΔTp) of the obtained pulse wave waveform is obtained. Since known methods such as a method of calculating based on the AI (Augmentation Index) of the pulse wave waveform can be applied, the description thereof is omitted here.

Furthermore, the CPU 40 also functions as a determination unit that determines whether or not the cuff is correctly attached based on the pressure information input from the

pressure sensors

33A and 33B. In addition, the CPU 40 also has a function of controlling the operations of the display unit 42 and the buzzer 44 as the above-described notification unit that notifies the subject or the like of this when the cuff 20 is not properly worn.

FIG. 6 is a flowchart showing the measurement operation of the blood pressure information measurement device according to the present embodiment. The program for executing the measurement operation shown in this flowchart is stored in advance in the memory unit 41 shown in FIG. 5, and the CPU 40 reads out this program from the memory unit 41 and executes it. The measuring operation shown is realized. FIG. 7 is a schematic diagram showing a wearing state in which the cuff shown in FIG. 1 is correctly worn on the upper arm. Further, FIG. 8 and FIG. 9 are graphs showing pressure changes of the pulse wave measurement air bag and the blood pressure value measurement air bag during the measurement operation of the blood pressure information measurement device according to the present embodiment. FIG. 9 shows a case where the cuff is incorrectly attached. Here, (A) in FIG. 8 and (A) in FIG. 9 show changes with time of the pressure (internal pressure P1) in the lumen 23c of the pulse wave measurement air bladder 23, and FIG. 9B and FIG. 9B show changes over time in the pressure (internal pressure P2) in the lumen 24c of the blood pressure value measuring air bladder 24. FIG. Next, referring to FIG. 6 to FIG. 9, the measurement operation of the blood pressure information measurement device 1 </ b> A according to the present embodiment, the wearing state of the cuff 20, the pulse wave measurement air bag 23, and the blood pressure value measurement air bag 24. A pressure change during the measurement operation, a method for determining the wearing state of the cuff for the blood pressure information measurement device in the present embodiment, and the like will be described.

When measuring various blood pressure information using the blood pressure information measuring apparatus 1A in the present embodiment, first, as shown in FIG. 7, the cuff 20 is worn on the upper arm 101 of the subject's left hand 100. FIG. 7 shows a case where the cuff 20 is correctly attached to the upper arm. In this case, the pulse wave measurement air bag 23 is positioned on the central side of the attachment site of the cuff 20 and the blood pressure value is shown. The measurement air bladder 24 is attached to a portion including the distal side from the position where the pulse wave measurement air bladder 23 is attached. On the other hand, when the cuff 20 is erroneously attached, the pulse wave measurement air bladder 23 is positioned on the distal side of the wearing part of the cuff 20, and the blood pressure value measurement air bladder 24 is replaced with the pulse wave measurement air bladder 23. It is not attached to the part including the distal side from the attached position (that is, the blood pressure value measuring air bag 24 is attached to the part including the central side from the position where the pulse wave measuring air bag 23 is attached). become.

Next, when the subject or the like operates the operation unit 43 of the main body 10, the blood pressure information measurement device 1A starts the measurement operation.

As shown in FIG. 6, when the CPU 40 receives an instruction to start a measurement operation, the CPU 40 initializes each unit (step S101). Specifically, the CPU 40 closes the exhaust valve 32A and the exhaust valve 32B.

Next, the CPU 40 starts pressurization of the blood pressure value measurement air bladder 24 by driving the pressurization pump 31B (step S102). As a result, as shown in FIG. 8B, the internal pressure P2 of the blood pressure value measuring air bladder 24 begins to rise at time t1 when the pressurizing pump 31B is driven. As shown in FIG. 8A, the internal pressure P1 of the pulse wave measurement air bladder 23 does not change even after the elapse of time t1. In the process of pressurizing the blood pressure value measurement air bladder 24, the CPU 40 acquires pressure information for calculating blood pressure values such as the systolic blood pressure (SYS) and the diastolic blood pressure (DIA). Specifically, the CPU 40 acquires the pressure information based on the pressure signal input from the pressure sensor 33B.

Next, as shown in FIG. 6, the CPU 40 determines whether or not the measurement of the blood pressure value is completed (step S103), and determines that the measurement of the blood pressure value is completed (in the case of YES in step S103). Then, pressurization of the pulse wave measurement air bladder 23 is started (step S104). Specifically, the CPU 40 stops driving the pressure pump 31B and drives the pressure pump 31A. As a result, as shown in FIG. 8B, the internal pressure P1 of the pulse wave measurement air bladder 23 begins to rise at time t2 when the pressurizing pump 31A is driven. As shown in FIG. 8B, the internal pressure P2 of the blood pressure value measurement air bladder 24 is maintained at a pressure higher than the maximum blood pressure after time t2, so that the blood pressure value measurement air bladder is concerned. The state in which the artery is blocked is maintained at the site where the upper arm 24 is wound.

Next, as shown in FIG. 6, the CPU 40 determines whether or not the pressurization of the pulse wave measurement air bladder 23 has been completed (step S105), and if it is determined that the pressurization has been completed (in step S105). In the case of YES, pulse wave measurement is started (step S106). Specifically, when the internal pressure P1 of the pulse wave measurement bladder 23 is higher than the maximum blood pressure based on the pressure signal input from the pressure sensor 33A, the CPU 40 detects the pulse wave measurement bladder 23. The pressurization of the pressurization pump 31A is stopped. Accordingly, as shown in FIGS. 8A and 8B, the internal pressure P1 of the pulse wave measurement air bladder 23 and the internal pressure P2 of the blood pressure value measurement air bladder 24 are driven by the pressurizing pump 31A. At time t3 when the operation is stopped, the pressure is maintained at a pressure higher than the systolic blood pressure. After time t3, a pulse wave propagated through the subcutaneous tissue from the artery adjacent to the central end of the blocked artery is transmitted. Thus, the pulse wave measurement air bag 23 having a small volume is observed with high sensitivity. After this time t3, the CPU 40 acquires a pulse wave based on the pressure information input from the pressure sensor 33A.

Next, as shown in FIG. 6, after a predetermined time has elapsed (for example, after about several seconds to several tens of seconds, ie, time t4 shown in FIGS. 8 and 9), the CPU 40 is based on the pressure information input from the pressure sensor 33A. Then, the amplitude of fluctuation of the internal pressure P1 of the pulse wave measurement air bladder 23 is compared with a predetermined value (step S107). More specifically, for example, as shown in FIG. 6, the CPU 40 determines whether or not the amplitude is equal to or greater than a predetermined value. Here, based on the pressure information input from the pressure sensor 33A, the step S107 for determining whether or not the amplitude of the fluctuation of the internal pressure P1 of the pulse wave measurement air bladder 23 is equal to or greater than a predetermined value is the pulse S107. The wave measurement air bladder 23 is located on the central side of the cuff 20 to be attached, and the blood pressure measurement air bladder 24 is attached to a portion including the distal side of the position where the pulse wave measurement air bladder 23 is attached. This corresponds to the step of determining whether or not the cuff 20 is correctly worn on the upper arm. Note that, in the above determination step, it is necessary as a precondition that the internal pressure P2 of the blood pressure value measurement bladder 24 is maintained at a pressure higher than the maximum blood pressure, and the CPU 40 satisfies the precondition. Is monitored based on pressure information input from the pressure sensor 33B.

This is because, when the cuff 20 is correctly attached to the upper arm, the pulse wave measurement air bladder 23 is positioned in the vicinity of the central end of the artery blocked by the blood pressure value measurement air bladder 24. Thus, the pulse wave is propagated from the portion of the artery adjacent to the central end of the blocked artery to the pulse wave measurement air bag 23 via the subcutaneous tissue, and the internal pressure P1 of the pulse wave measurement air bag 23 is increased. This is because the fluctuation is observed with high sensitivity (refer to the section from time t3 to time t4 shown in FIG. 8A), and as a result, the amplitude of the internal pressure P1 has a large amplitude suitable for pulse wave measurement. is there.

On the other hand, when the cuff 20 is erroneously attached, the pulse wave measurement air bladder 23 is positioned near the distal end of the artery blocked by the blood pressure value measurement air bladder 24. No pulse wave is generated in the artery in the vicinity of the portion where the pulse wave measurement air bladder 23 is located, and therefore the pulse wave is not observed with high sensitivity as the fluctuation of the internal pressure P1 of the pulse wave measurement air bladder 23 (FIG. 9). This is because, as a result, the amplitude of the internal pressure P1 does not have a large amplitude suitable for pulse wave measurement (see the section from time t3 to time t4 shown in (A)).

As shown in FIG. 6, when it is determined that the amplitude of fluctuation of the internal pressure P1 is greater than or equal to a predetermined value (YES in step S107), CPU 40 continues to measure the pulse wave. . Thereafter, the CPU 40 determines whether or not the measurement of the pulse wave has been completed (step S108), and when it is determined that the measurement of the pulse wave has been completed (YES in step S108), the CPU 40 calculates the blood pressure value and determines the pulse wave. Wave analysis is performed (step S109). Specifically, the CPU 40 calculates an index indicating the maximum blood pressure (SYS), the minimum blood pressure (DIA), and the degree of arteriosclerosis based on the acquired pressure information and the pulse wave.

Next, the CPU 40 displays the result (step S110). Specifically, the CPU 40 outputs an index indicating the calculated systolic blood pressure, diastolic blood pressure, and degree of arteriosclerosis to the memory unit 41 and the display unit 42, the memory unit 41 stores this, and the display unit 42 Display the measurement result based on

Next, the CPU 40 shifts to a stop operation (step S111). Specifically, the CPU 40 opens the exhaust valve 32A and the exhaust valve 32B. Thus, as shown in FIGS. 8A and 8B, the internal pressure P1 of the pulse wave measurement air bladder 23 and the internal pressure P2 of the blood pressure value measurement air bladder 24 open the exhaust valve 32B. At time t5, it starts decreasing and returns to atmospheric pressure. After the operation, the subject pulls out the upper arm from the cuff 20. As described above, a series of measurement operations is completed, and measurement of various blood pressure information using the blood pressure information measurement device 1A in the present embodiment is completed.

On the other hand, as shown in FIG. 6, when it is determined that the amplitude of fluctuation of the internal pressure P1 is less than a predetermined value (NO in step S107), the CPU 40 performs error notification (step S112). ). Specifically, the CPU 40 outputs a signal instructing the display unit 42 to display a warning mark or the like, and outputs a signal instructing the buzzer 44 to generate a warning sound or the like. Based on this, when the buzzer 44 sounds, a warning sound or the like is emitted, and a warning mark or the like is displayed on the display unit 42, so that the subject or the like is informed that the cuff 20 is worn incorrectly. . Note that after performing the error notification, the CPU 40 immediately proceeds to step S111 and ends the series of operations.

By using the blood pressure information measuring device 1A in the present embodiment described above, and by adopting the method for determining the wearing state of the cuff for the blood pressure information measuring device in the present embodiment, the direction of the cuff 20 is worn incorrectly. This can be recognized by the device. Therefore, it is possible to notify the subject or the like that the cuff 20 is erroneously attached, and it is possible to prompt the cuff 20 to be correctly attached. In addition, when the cuff 20 is erroneously attached, it is possible to immediately stop the subsequent measurement operation, and the state where the artery is blocked more than necessary is not maintained. Can also be avoided. Therefore, by using the blood pressure information measurement device 1A as in the present embodiment and adopting the cuff wearing state determination method of the blood pressure information measurement device in the present embodiment, the pulse wave measurement can be performed correctly. become.

FIG. 10 is a diagram showing a functional block configuration of the blood pressure information measurement device according to the first modification based on the present embodiment. Next, with reference to FIG. 10, a blood pressure information measuring device 1B according to this modification will be described.

As shown in FIG. 10, the blood pressure information measuring apparatus 1B according to the present modification has a common pressure increasing / decreasing mechanism 30B for increasing / decreasing the pressure wave measuring air bag 23 and the blood pressure value measuring air bag 24. It has been made. That is, in the blood pressure information measuring apparatus 1A in the present embodiment described above, a pressurizing pump 31A and an exhaust valve 32A are provided as a pressure increasing / decreasing mechanism 30A for increasing / decreasing the pulse wave measurement air bladder 23, and blood pressure measurement is performed. A pressure pump 31B and an exhaust valve 32B are provided as a pressure increasing / decreasing mechanism 30B for increasing / decreasing the air bladder 24, and the pressure increasing / decreasing mechanism 30A and the pressure increasing / decreasing mechanism 30B are controlled by the CPU 40 independently. However, in the blood pressure information measuring device 1B according to the present modification, the pressure increasing / decreasing mechanism 30A is abolished, and the pressure wave measuring air is added to the pressure increasing / decreasing mechanism 30B in addition to the blood pressure value measuring air bag 24 instead. The bag 23 is also connected, and the CPU 40 controls this one pressure increasing / decreasing mechanism 30B, whereby both the pulse wave measuring air bag 23 and the blood pressure value measuring air bag 24 are controlled. It is configured to perform decompression.

Specifically, in the blood pressure information measuring device 1B according to this modification, the branched air that branches from the air tube 71 to the air tube 71 that connects the blood pressure value measuring air bladder 24 and the pressure increasing / decreasing mechanism 30B. A pipe 72 is provided, and the pulse wave measurement air bladder 23 and the pressure sensor 33A are connected to the branch air pipe 72. Further, a 2-port valve 50 is provided at a predetermined position of the branch air pipe 72. Further, in the blood pressure information measuring device 1B according to this modification, a two-port valve drive circuit 51 for controlling the operation of the two-port valve 50 is separately provided.

Here, the drive of the 2-port valve 50 is controlled by the 2-port valve drive circuit 51 that has received a command from the CPU 40, and the air tube 71 and the pulse wave measurement air bladder 23 are in communication with each other in the open state, thereby being closed. In FIG. 5, the air tube 71 and the pulse wave measurement air bladder 23 are disconnected from each other, and the internal pressure of the pulse wave measurement air bladder 23 is maintained. In the blood pressure information measurement device 1B according to the present modification, the pressurization pump drive circuit 36A and the exhaust valve drive circuit 37A are not provided in accordance with the abolition of the pressure increase / decrease mechanism 30A.

In the blood pressure information measuring apparatus 1B, the 2-port valve 50 is switched to the open state to pressurize the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24. The value is measured, and then the 2-port valve 50 is switched to the closed state to measure the pulse wave. At the time of this pulse wave measurement, it is determined whether or not the above-described cuff 20 is correctly attached.

In the case of the blood pressure information measuring device 1B according to the present modification described above, not only the same effect as that obtained when the blood pressure information measuring device 1A in the present embodiment described above is obtained, The apparatus configuration can be simplified, whereby a blood pressure information measuring apparatus that can be configured at low cost and in a small size can be obtained.

FIG. 11 is a diagram showing a functional block configuration of the blood pressure information measurement device according to the second modified example based on the present embodiment. Next, with reference to FIG. 11, a blood pressure information measuring device 1C according to this modification will be described.

As shown in FIG. 11, the blood pressure information measurement device 1C according to the present modification includes three ports of the 2-port valve 50 provided in the branch air pipe 72 in the blood pressure information measurement device 1B according to the first modification described above. The valve 52 is changed. In that case, the arrangement position of the three-port valve 52 is a connection point between the air pipe 71 and the branch air pipe 72. The driving of the three-port valve 52 is controlled by a three-port valve drive circuit 53 that has received a command from the CPU 40.

Here, in the first state, the 3-port valve 52 connects only the pressure-reducing mechanism 30B side of the air pipe 71 and the branch air pipe 72 with respect to the position where the 3-port valve 52 is provided. 30B and the pulse wave measurement air bladder 23 are in communication with each other, and in the second state, the portion of the air tube 71 closer to the pressure-reducing mechanism 30B than the position where the 3-port valve 52 is provided and the 3-port valve 52 of the air tube 71. Only the portion on the blood pressure value measurement air bladder 24 side than the position where the air pressure is provided is connected to allow the pressure-increasing / depressurizing mechanism 30B and the blood pressure value measurement air bladder 24 to communicate with each other. The bag 23 may be configured not to communicate with the bag 23 and maintain the internal pressure of the pulse wave measurement air bag 23. In that case, the 3-port valve 52 is switched to the second state to measure blood pressure, and after the blood pressure measurement is completed, the 3-port valve 52 is switched to the first state to measure the pulse wave using the pressure increasing / decreasing mechanism 30B. The air bag 23 is pressurized, and then the 3-port valve 52 is switched to the second state again to measure the pulse wave. At the time of this pulse wave measurement, it is determined whether or not the above-described cuff 20 is correctly attached.

Instead of the above, in the first state, the three-port valve 52 includes only the portion of the air tube 71 closer to the blood pressure measurement air bladder 24 than the position where the three-port valve 52 is provided and the branch air tube 72. To connect the air bag 23 for measuring the pulse wave and the air bag 24 for measuring the blood pressure value, and in the second state, on the side of the pressure increasing / decreasing mechanism 30B from the position where the 3-port valve 52 of the air tube 71 is provided. By connecting only the portion and the portion on the blood pressure value measurement air bladder 24 side of the position where the three-port valve 52 of the air tube 71 is provided, the pressure increasing / decreasing mechanism 30B and the blood pressure value measurement air bladder 24 are connected. The air tube 71 and the pulse wave measurement air bladder 23 may be disconnected from each other to maintain the internal pressure of the pulse wave measurement air bladder 23. In that case, the 3-port valve 52 is switched to the second state to measure blood pressure, and after the blood pressure measurement is completed, the 3-port valve 52 is switched to the first state to air in the blood pressure value measurement air bladder 24. Is moved to the pulse wave measurement air bladder 23 to pressurize the pulse wave measurement air bladder 23, and then the 3-port valve 52 is switched to the second state again to perform pulse wave measurement. . At the time of this pulse wave measurement, it is determined whether or not the above-described cuff 20 is correctly attached.

Even when the blood pressure information measurement device 1C according to the present modification described above is used, the same effect as that obtained when the blood pressure information measurement device 1B according to the first modification described above is obtained can be obtained.

FIG. 12 is a development view when the cuff of the blood pressure information measurement device according to the third modification based on Embodiment 1 of the present invention is viewed from the outer peripheral surface side. Next, a blood pressure information measurement device according to this modification will be described with reference to FIG.

As shown in FIG. 12, the blood pressure information measuring device according to the present modification has the above-described embodiment at the arrangement position of the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 contained in the cuff 20. This is different from that of the blood pressure information measuring apparatus 1A. Specifically, in the blood pressure information measurement device according to this modification, the pulse wave measurement air bladder 23 is disposed so as to be located only on one end side in the width direction of the cuff 20, and the blood pressure value The measurement air bladder 24 is disposed so as to be located only on the other end side in the width direction of the cuff 20. That is, the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 are arranged side by side along the width direction of the cuff 20 (corresponding to the axial direction in the mounted state).

Here, the one end portion in the width direction of the cuff 20 on the side where the pulse wave measurement air bladder 23 is disposed is an end portion disposed on the central side in the mounted state, and therefore the pulse wave measurement air bladder 23 is In the wearing state, it is wound only on the central side of the upper arm, which is the wearing part. On the other hand, the other end portion in the width direction of the cuff 20 on the side where the blood pressure value measurement air bladder 24 is disposed is an end portion disposed on the distal side in the mounted state. In the wearing state, it is wound only on the distal side of the upper arm, which is the wearing site.

As a result, in the blood pressure information measuring device according to the present modification, not only the blood pressure value measuring air bladder 24 but also the pulse wave measuring air bladder 23 is attached to the curler 26 that is positioned outside in the mounted state. Bonded and fixed. In the blood pressure information measurement device according to the present modification, the cushion material 28 as the vibration blocking member provided in the blood pressure information measurement device 1A in the above-described embodiment is not necessary.

Even when the blood pressure information measuring device according to the present modification described above is used, the same effect as that obtained when the blood pressure information measuring device 1A according to the present embodiment is used can be obtained.

(Embodiment 2)
FIG. 13 is a flowchart showing the measurement operation of the blood pressure information measurement device according to Embodiment 2 of the present invention. FIG. 14 shows fluctuations in the amplitude of the pressure change of the pulse wave measurement air bag and the blood pressure value measurement air bag during the measurement operation when the cuff is correctly worn in the blood pressure information measurement device according to the present embodiment. FIG. 15 is a graph showing the fluctuation of the amplitude of the pressure change of the pulse wave measurement air bag and the blood pressure value measurement air bag during the measurement operation in the case of erroneous mounting. Here, (A) in FIG. 14 and (A) in FIG. 15 show changes with time in the pressure (internal pressure P1) of the lumen 23c of the pulse wave measurement air bladder 23, and FIG. 15B and FIG. 15B show the change over time of the pressure (internal pressure P2) in the lumen 24c of the blood pressure value measuring air bladder 24. FIG. In the following, referring to FIG. 13 to FIG. 15, the pressure change during the measurement operation of the blood pressure information measurement device according to the present embodiment, and the measurement operation of the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24. A method for determining the wearing state of the cuff for the blood pressure information measurement device according to the present embodiment will be described.

The blood pressure information measurement device according to the present embodiment is common to the blood pressure information measurement device 1A according to the first embodiment of the present invention described above and the configuration thereof, and is different only in the measurement operation. A program for executing the measurement operation shown in the flowchart shown in FIG. 13 is stored in the memory unit 41 in advance, and the CPU 40 reads out the program from the memory unit 41 and executes it, and the program is shown in the flowchart. Measurement operation is realized. In the blood pressure information measurement apparatus 1A according to the first embodiment of the present invention described above, the measurement operation is controlled so as to pressurize the pulse wave measurement air bladder 23 after blood pressure measurement is completed. In the blood pressure information measuring device in the embodiment, the measurement operation is controlled so that the pulse wave measurement air bladder 23 is pressurized simultaneously with the pressurization of the blood pressure value measurement air bladder 24, and the pressurization is performed. In the process, it is determined whether or not the cuff 20 is correctly attached.

When measuring various blood pressure information using the blood pressure information measuring apparatus according to the present embodiment, first, the cuff 20 is worn on the upper arm 101 of the subject's left hand 100. Next, when the subject or the like operates the operation unit 43 of the main body 10, the blood pressure information measurement device starts the measurement operation.

As shown in FIG. 13, when the CPU 40 receives an instruction to start a measurement operation, the CPU 40 initializes each unit (step S201). Specifically, the CPU 40 closes the exhaust valve 32A and the exhaust valve 32B.

Next, the CPU 40 starts pressurization of the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 by driving the pressurization pump 31A and the pressurization pump 31B (step S202). Accordingly, as shown in FIGS. 14 and 15, the internal pressure P1 of the pulse wave measurement air bladder 23 and the internal pressure P2 of the blood pressure value measurement air bladder 24 are the times when the pressurization pump 31A and the pressurization pump 31B are driven. Each rise starts at t11.

Next, as shown in FIG. 13, the CPU 40 changes the internal pressure P1 of the pulse wave measurement air bladder 23 and the blood pressure based on the pressure information input from the pressure sensor 33A and the pressure information input from the pressure sensor 33B. A cross-correlation with the fluctuation of the internal pressure P2 of the value measurement air bladder 24 is calculated, and the calculated cross-correlation is compared with a predetermined value (step S203). More specifically, as shown in FIG. 13, for example, the CPU 40 determines whether or not the cross-correlation is equal to or greater than a predetermined value. More specifically, as shown in FIGS. 14 and 15, the CPU 40 calculates the amplitude component of the internal pressure P1 of the pulse wave measurement air bladder 23 based on the pressure information input from the pressure sensor 33A in step S203. Extracting and acquiring the envelope A1, and extracting the amplitude component of the internal pressure P2 of the blood pressure value measuring air bag 24 based on the pressure information input from the pressure sensor 33B to acquire the envelope A2, The cross-correlation between the acquired envelope A1 and envelope A2 is calculated, and it is determined whether or not the calculated cross-correlation is a predetermined value or more.

Here, based on the pressure information input from the pressure sensor 33A and the pressure sensor 33B, a cross-correlation between the fluctuation of the internal pressure P1 of the pulse wave measurement air bladder 23 and the fluctuation of the internal pressure P2 of the blood pressure value measurement air bladder 24 is calculated. In step S203 for determining whether or not the calculated cross-correlation is equal to or greater than a predetermined value, the pulse wave measurement air bladder 23 is positioned on the central side of the cuff 20 to be worn and is used for blood pressure measurement. A step of determining whether or not the air bag 24 is attached to a portion including the distal side of the position where the pulse wave measurement air bag 23 is attached (that is, whether or not the cuff 20 is correctly attached to the upper arm). It corresponds to.

This is because, when the cuff 20 is correctly attached to the upper arm, the artery of the portion where the cuff 20 is attached is integrated with the pulse wave measurement air bag 23 and the blood pressure value measurement air bag 24 gradually. Since the blood is blocked, the envelope A1 and the envelope A2 are substantially similar to each other, and a high cross-correlation is obtained. On the other hand, when the cuff 20 is incorrectly attached, the envelope A1 and the envelope A2 are more Since the artery is first blocked by the blood pressure value measuring air bag 24 located on the central side, and the pulse wave does not propagate to the pulse wave measuring air bag 23 after the blood is blocked, the envelope A1 and the envelope A2 are not This is because they have similar shapes and only a low cross-correlation can be obtained. That is, when the cuff 20 is erroneously attached, as shown in FIG. 15, the fluctuation of the internal pressure P1 of the pulse wave measurement bladder 23 at time t12 when the artery is blocked by the blood pressure measurement bladder 24 As for the amplitude component, the rate of increase begins to attenuate greatly, and then starts to decrease, so that the amplitude component is almost eliminated, and the cross-correlation is greatly reduced. Therefore, based on the cross correlation, it is possible to determine whether or not the cuff 20 is correctly attached. Here, as the above-described cross-correlation threshold value, for example, a value of about 0.5 to 0.8 is preferably adopted.

In parallel with the processing in step S203 described above, the CPU 40 calculates blood pressure values such as the highest blood pressure and the lowest blood pressure in the pressurization process of the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24. Get pressure information for. Specifically, the CPU 40 acquires the pressure information based on the pressure signal input from the pressure sensor 33B.

As shown in FIG. 13, when it is determined that the calculated cross-correlation is equal to or greater than a predetermined value (YES in step S203), the CPU 40 determines whether or not the measurement of the blood pressure value is completed. If it is determined that the measurement of the blood pressure value has been completed (YES in step S204), the pulse wave measurement is started (step S205). Specifically, the CPU 40 stops driving the pressure pump 31A and the pressure pump 31B, and acquires a pulse wave based on pressure information input from the pressure sensor 33A. In this state, the internal pressure P1 of the pulse wave measurement air bladder 23 and the internal pressure P2 of the blood pressure value measurement air bladder 24 are maintained at pressures higher than the maximum blood pressure, respectively, at the central end of the blocked artery. A pulse wave propagated from the adjacent artery through the subcutaneous tissue is sharply observed in the small-capacity pulse wave measurement air bag 23.

Next, the CPU 40 determines whether or not the measurement of the pulse wave is completed (step S206), and when it is determined that the measurement of the pulse wave is completed (YES in step S206), the CPU 40 calculates the blood pressure value. Pulse wave analysis is performed (step S207). Specifically, the CPU 40 calculates indices indicating the maximum blood pressure, the minimum blood pressure, and the degree of arteriosclerosis based on the acquired pressure information and the pulse wave.

Next, the CPU 40 displays the result (step S208). Specifically, the CPU 40 outputs an index indicating the calculated systolic blood pressure, diastolic blood pressure, and degree of arteriosclerosis to the memory unit 41 and the display unit 42, the memory unit 41 stores this, and the display unit 42 Display the measurement result based on

Next, the CPU 40 shifts to a stop operation (step S209). Specifically, the CPU 40 opens the exhaust valve 32A and the exhaust valve 32B. As a result, the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 return to atmospheric pressure. After the operation, the subject pulls out the upper arm from the cuff 20. As described above, the series of measurement operations is completed, and the measurement of various blood pressure information using the blood pressure information measurement device according to the present embodiment is completed.

On the other hand, when it is determined that the calculated cross-correlation is less than a predetermined value (NO in step S203), the CPU 40 performs error notification (step S210). Specifically, the CPU 40 outputs a signal instructing the display unit 42 to display a warning mark or the like, and outputs a signal instructing the buzzer 44 to generate a warning sound or the like. Based on this, when the buzzer 44 sounds, a warning sound or the like is emitted, and a warning mark or the like is displayed on the display unit 42, so that the subject or the like is informed that the cuff 20 is worn incorrectly. . After the error notification, the CPU 40 immediately moves to step S211 and ends a series of operations.

By using the blood pressure information measuring device in the present embodiment described above, and adopting the cuff mounting state determination method for the blood pressure information measuring device in the present embodiment, the above-described first embodiment of the present invention is described. In addition to the same effects as in the above case, it is possible to notify the subject of this even more quickly (earlier from the start of measurement) if there is an erroneous attachment. Therefore, usability can be further improved by using the blood pressure information measurement device according to the present embodiment and adopting the cuff wearing state determination method for the blood pressure information measurement device according to the present embodiment.

In the blood pressure information measurement apparatus and the cuff wearing state determination method according to the present embodiment described above, in step S203, the amplitude component of the internal pressure P1 of the pulse wave measurement bladder 23 is described above. Whether or not the cuff 20 is correctly worn on the upper arm by obtaining the envelope A1 of the blood pressure and the envelope A2 of the amplitude component of the internal pressure P2 of the blood pressure measurement air bladder 24 and calculating the cross-correlation thereof. Was going to judge. However, instead of this, in step S203, the ratio between the amplitude component of the internal pressure P1 of the pulse wave measurement bladder 23 and the amplitude component of the internal pressure P2 of the blood pressure measurement bladder 24 is calculated. It is also possible to determine whether the cuff 20 is correctly attached to the upper arm by comparing the calculated ratio with a predetermined value. In such a configuration, for example, when it is determined that the ratio is greater than or equal to a predetermined value, it is determined that the cuff 20 is correctly attached, and the ratio is determined to be less than the predetermined value. In this case, it may be determined that the cuff 20 is erroneously attached.

In the above-described first and second embodiments of the present invention and the modifications thereof, the blood pressure information measuring apparatus in which the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 are provided in a single cuff. Although the case where the present invention is applied has been described as an example, the present invention is applied to a blood pressure information measuring device in which the pulse wave measurement air bladder 23 and the blood pressure value measurement air bladder 24 are provided in separate cuffs. Of course it is also possible.

In the above-described first and second embodiments of the present invention and the modifications thereof, the main body 10 and the cuff 20 are configured separately, and the main body 10 and the cuff 20 are formed of a flexible air tube 70 or the like. Although the case where the present invention is applied to the blood pressure information measuring device connected via the connector is illustrated and explained, the main body 10 and the cuff 20 are configured as separate bodies, and these are movably connected. Of course, it is also possible to apply the present invention to an information measuring device (so-called automatic wrapping blood pressure information measuring device).

Further, in the above-described first and second embodiments of the present invention and the modifications thereof, the case where the present invention is applied to a blood pressure information measuring device in which the upper arm is intended as a wearing part of the cuff 20 will be described as an example. However, the present invention can be applied to any blood pressure information measuring device that is intended to be worn and used on any limb selected from the limbs of the body. .

Further, in the above-described first and second embodiments of the present invention and the modifications thereof, when an air bag into which compressed air is injected is adopted as the pulse wave measurement air bag 23 and the blood pressure value measurement air bag 24. However, the present invention is not limited to the air bag, and it is of course possible to configure these with a gas bag into which another gas is injected or a liquid bag into which a liquid is injected. is there.

In the above-described first and second embodiments of the present invention and modifications thereof, the cuff 20 is correctly attached by determining whether the detected or calculated value is equal to or greater than a predetermined threshold value. However, the present invention is not limited to this method, and it is naturally determined whether the detected or calculated value is larger than or smaller than a predetermined threshold. By doing so, it may be determined whether or not the cuff 20 is correctly attached.

Furthermore, in the above-described first and second embodiments of the present invention and the modifications thereof, the case where the present invention is applied to a blood pressure information measurement device capable of acquiring indices indicating the maximum blood pressure, the minimum blood pressure, and the degree of arteriosclerosis is illustrated. As described above, the present invention can be applied to any blood pressure information measuring apparatus having at least a function of acquiring a pulse wave, even if it acquires blood pressure information other than the above.

Thus, the above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the scope of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1A to 1C Blood pressure information measuring device, 10 body, 11 casing, 20 cuff, 21 exterior cover, 21a inner cover, 21b outer cover, 23 pulse wave measurement air bag, 23a inner circumference, 23b outer circumference, 23c lumen, 24 Blood pressure measurement air bladder, 24a inner periphery, 24b outer periphery, 24c lumen, 26 curler, 28 cushion material, 29A, 29B hook and loop fastener, 30A, 30B pressure increase / decrease mechanism, 31A, 31B pressure pump, 32A, 32B exhaust valve, 33A, 33B pressure sensor, 36A, 36B pressure pump drive circuit, 37A, 37B exhaust valve drive circuit, 38A, 38B amplifier, 39A, 39B A / D converter, 40 CPU, 41 memory unit, 42 display Section, 43 operation section, 44 buzzer, 50 2-port valve, 51 2-port DOO valve drive circuit, 52 three-port valve, 53 three-port valve driving circuit, 70 and 71 an air pipe, 72 branch air tube, 100 left, 101 upper arm.

Claims

A first fluid bag (23) to be wrapped around a predetermined position of any limb selected from the limbs;
A second fluid bag (24) to be wrapped around a position that includes a portion of the selected limb that is distal to the predetermined position;
A first pressure detector (33A) for detecting an internal pressure of the first fluid bag (23);
A second pressure detector (33B) for detecting the internal pressure of the second fluid bag (24);
A pressure increasing / decreasing mechanism that pressurizes and depressurizes the first fluid bag (23) and the second fluid bag (24);
A control unit (40) for controlling the driving of the pressurizing and depressurizing mechanism;
A pulse wave acquisition unit that acquires a pulse wave based on the pressure information detected by the first pressure detection unit (33A);
Based on the pressure information detected by the first pressure detection unit (33A) and the pressure information detected by the second pressure detection unit (33B), more distal than the predetermined position of the selected limb A blood pressure information measuring device comprising: a determination unit that determines whether or not the second fluid bag (24) is wound around a position including the portion.
In the state where the first fluid bag (23) and the second fluid bag (24) are pressurized to a maximum blood pressure or higher by using the pressurization / decompression mechanism, the determination unit is the first pressure detection unit (33A). By comparing the detected amplitude of the fluctuation of the internal pressure of the first fluid bag (23) with a predetermined value, the second fluid is positioned at a position including a portion of the selected limb that is more distal than the predetermined position. The blood pressure information measuring device according to claim 1, wherein it is determined whether or not the bag (24) is wound.
In the process of pressurizing the first fluid bag (23) and the second fluid bag (24) using the pressurization / decompression mechanism, the determination unit detects the first fluid detection unit (33A) and detects the first fluid bag (23). The amplitude of the amplitude component included in the internal pressure fluctuation of one fluid bag (23) and the amplitude of the amplitude component included in the internal pressure fluctuation of the second fluid bag (24) detected by the second pressure detector (33B) Is compared with a predetermined value, it is determined whether or not the second fluid bag (24) is wound around a position including a portion on the distal side of the selected position of the selected limb. The blood pressure information measurement device according to claim 1.
In the process of pressurizing the first fluid bag (23) and the second fluid bag (24) using the pressurization / decompression mechanism, the determination unit detects the first fluid detection unit (33A) and detects the first fluid bag (23). The cross-correlation between the internal pressure fluctuation of one fluid bag (23) and the internal pressure fluctuation of the second fluid bag (24) detected by the second pressure detector (33B) is calculated, and the calculated cross-correlation is determined in advance. 2. It is determined whether or not the second fluid bag (24) is wound around a position including a portion of the selected limb that is more distal than the predetermined position by comparing with the selected value. The blood pressure information measuring device described.
When the control unit (40) determines that the second fluid bag (24) is not wound around a position including a portion on the distal side of the selected position of the selected limb body, The blood pressure information measurement device according to claim 1, wherein the driving of the pressure increasing / decreasing mechanism is controlled so that the first fluid bag (23) and the second fluid bag (24) are immediately decompressed.
A notifying unit for notifying the second fluid bag (24) when the determining unit determines that the second fluid bag (24) is not wound around a position including a portion of the selected limb that is more distal than the predetermined position; The blood pressure information measuring device according to claim 1 provided.
The blood pressure information measurement device according to claim 1, further comprising a blood pressure value acquisition unit that acquires a blood pressure value based on the pressure information detected by the second pressure detection unit (33B).
The blood pressure information measuring device according to claim 1, wherein the first fluid bag (23) and the second fluid bag (24) are provided in a single cuff (20).
The second fluid bag (24) is attached to the first fluid bag (23) so that the second fluid bag (24) is wound over substantially the entire attachment site in the mounted state of the cuff (20). The blood pressure information measurement device according to claim 8, which covers an outer side.
The second fluid bag (24) is attached to the shaft of the cuff (20) so that the second fluid bag (24) is wound only on a portion other than the central side of the attachment site in the mounted state of the cuff (20). The blood pressure information measuring device according to claim 8, wherein the blood pressure information measuring device is arranged alongside the first fluid bag (23) along a direction.
The blood pressure information measurement device according to claim 1, further comprising an index calculation unit that calculates an index indicating a degree of arteriosclerosis based on the pulse wave acquired by the pulse wave acquisition unit.
A first fluid bag (23) to be wound around a predetermined position of one of the limbs selected from the four limbs, and a first fluid bag (23) to be wound around a position including a portion of the selected limb that is more distal than the predetermined position. A method for determining a wearing state of a cuff for a blood pressure information measuring device including a two-fluid bag (24),
Detecting the internal pressure of the first fluid bag (23) and the internal pressure of the second fluid bag (24), respectively.
Determining whether or not the second fluid bag (24) is wound around a position including a portion on the distal side of the selected position of the selected limb based on the detected pressure information. A cuff wearing state determination method for a blood pressure information measurement device.