JP2013158347A - Detection unit for blood pressure information measuring device, and blood pressure information measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection unit for a blood pressure information measuring device which allows easy assembly of a photoelectric sensor, and is capable of stably and highly accurately measuring volume pulse waves over a long period of time.SOLUTION: A cuff 10A as a detection unit for a blood pressure information measuring device includes: an air bag 20A having therein a space 22 for compression for compressing a wrist 200; and a light emitting element 31 and a light receiving element 32 as a photoelectric sensor. The air bag 20A further has a housing space 24 formed by joining a sheet-like member 23 to the outer surface of a bag-like member 21 configuring the space 22 for compression. The light emitting element 31 and the light receiving element 32 are housed within the housing space 24 and are held by being sandwiched between the bag-like member 21 and the sheet-like member 23.

Description

  The present invention relates to a blood pressure information measurement device that acquires blood pressure information by an optical technique and a detection unit for the blood pressure information measurement device (hereinafter also simply referred to as a detection unit).

  Obtaining blood pressure information is very important for knowing the health condition of the subject. In recent years, it is not limited to measuring systolic blood pressure values (maximum blood pressure), diastolic blood pressure values (minimum blood pressure), and the like, which have been widely recognized as useful indices for health care. Attempts have been made to capture cardiac load, arteriosclerosis, etc. by measuring waves.

  The blood pressure information measuring device is a device for obtaining an index for health management based on the measured blood pressure information, and further utilization is expected in the fields of early detection, prevention, treatment, etc. of cardiovascular diseases. . 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.

  The pulse wave, which is one of the blood pressure information, includes a pressure pulse wave and a volume pulse wave due to differences in detection methods. The pressure pulse wave is obtained by capturing the pulse wave as a change in the intravascular pressure accompanying the heart beat, and the volume pulse wave is obtained by capturing the pulse wave as the change in the intravascular volume accompanying the heart beat. . Here, since the change in the intravascular volume is a phenomenon that occurs in accordance with the change in the intravascular pressure, the pressure pulse wave and the volume pulse wave can be said to be medically equivalent indices. It should be noted that the change in the intravascular volume can be regarded as a change in the amount of blood tissue in the blood vessel.

  The term blood pressure information measurement device used in this specification refers to all devices having at least a function of acquiring a pulse wave. More specifically, a blood tissue amount variation is detected by an optical technique. It refers to a device that acquires volumetric pulse waves. In that sense, the blood pressure information measurement device is not limited to outputting the acquired volume pulse wave as it is as a measurement result, but only a specific other index calculated based on the acquired volume pulse wave is used as the measurement result. What outputs it and what outputs together the said other specific parameter | index and the acquired volume pulse wave as a measurement result are also included. Here, specific other indexes include systolic blood pressure values, diastolic blood pressure values, average blood pressure values, pulse, AI (Augmentation Index) values as indexes indicating the degree of arteriosclerosis, and the like.

  The volume pulse wave indicates a periodic fluctuation of the intravascular volume accompanying the pulsation of the heart as a wave. In this sense, in this specification, the fluctuation of the intravascular volume is observed with at least a time difference. If so, it will be referred to as a volume pulse wave regardless of its temporal resolution. Needless to say, in order to precisely capture the volume pulse wave included in one beat, it is necessary to have a high temporal resolution.

  In general, blood pressure information measuring devices that can acquire volume pulse waves in a non-invasive manner without causing pain to the subject are classified into the following three types based on the difference in the measurement method.

  The blood pressure information measurement device based on the first measurement method includes an ultrasonic sensor, and uses this ultrasonic sensor to apply ultrasonic waves to a living tissue including an artery and detect the reflected wave to thereby determine the internal volume of the artery. Based on this, the volume pulse wave of the artery is acquired.

  The blood pressure information measurement device based on the second measurement method includes a bioimpedance measurement device, which captures fluctuations in the volume of an artery by measuring a bioimpedance by applying a weak current to a living tissue including an artery, and based on this. Thus, the volume pulse wave of the artery is acquired.

  The blood pressure information measurement device based on the third measurement method includes a photoelectric sensor including a light emitting element and a light receiving element, irradiates a living tissue including an artery with light emitted from the light emitting element, and transmits transmitted light of the irradiated light. Is detected by a light-receiving element, and blood tissue volume fluctuations are captured, and based on this, a volume pulse wave of an artery is acquired.

  Among these, the blood pressure information measurement device based on the third measurement method using the photoelectric sensor has a relatively simple configuration of the measurement system compared to the blood pressure information measurement device based on the first and second measurement methods described above. It is advantageous in that it can be realized. Further, in the blood pressure information measuring device based on the third measuring method, since it is possible to use a biological photoelectric sensor conventionally used for a pulse meter, an oxygen saturation meter, etc. as a measurement system, It is also excellent in that the device can be manufactured at a reasonable cost.

  As a blood pressure information measuring device using such a photoelectric sensor, for example, Japanese Patent Application Laid-Open No. 63-168147 (Patent Document 1), Japanese Patent Application Laid-Open No. 6-311972 (Patent Document 2), and Japanese Patent Application Laid-Open No. 2009-183628. (Patent Document 3) and others are disclosed.

  The blood pressure information measuring device disclosed in Patent Literature 1 includes a hollow opening compression body (fluid bag) having an inner wall made of an elastic body surrounded by a sealed compression space, and an inner surface or an outer surface of the inner wall of the compression body. A photoelectric sensor attached to the surface and a pressurizing mechanism for pressurizing the compression space of the compression body are provided. In the blood pressure information measurement device, a finger as a measurement site is inserted into the hollow opening of the compression body at the time of measurement, and the finger is compressed by pressing the compression space of the compression body, The volume pulse wave is measured using a sensor.

  The blood pressure information measurement device disclosed in Patent Document 2 covers a pressurizing body having a tip formed in a hemispherical shape, a photoelectric sensor embedded in the surface of the tip of the pressurizing body, and the photoelectric sensor. And a fluid bag attached to the tip of the pressurizing body. A fluid such as a predetermined volume of air or liquid is sealed in the fluid bag in advance. In the blood pressure information measuring device, the tip of the pressurizing body is pressed toward the measurement site at the time of measurement, while the fluid bag is compressed by the pressurization body and the measurement site, The volume pulse wave is measured using a sensor.

  The blood pressure information measuring device disclosed in Patent Literature 3 covers a fixed frame including a base and a guide portion protruding from the base, a photoelectric sensor attached to the surface of the base of the fixed frame, and the photoelectric sensor. Thus, a fluid bag provided on the base of the fixed frame and a pressurizing mechanism for pressurizing the fluid bag are provided. In the blood pressure information measuring device, the measurement area is pressurized by pressing the fluid bag so that the fixed frame is pressed and fixed to the measurement area so that the tip of the guide portion contacts the body surface during measurement. While maintaining this state, the volume pulse wave is measured using the photoelectric sensor.

JP 63-168147 A JP-A-6-311972 JP 2009-183628 A

  In general, in a blood pressure information measuring device using a photoelectric sensor, it is necessary to position the photoelectric sensor with a certain degree of accuracy relative to the measurement site. This is because it is necessary to sufficiently increase the amount of light transmitted through the artery in order to obtain the volume pulse wave with high accuracy using the photoelectric sensor. This is because it is indispensable to position the arrangement position to some extent. If the photoelectric sensor is displaced from the artery, the amount of light that passes through the artery decreases, and the amount of light that passes through the living tissue portion other than the artery increases. The S / N (Signal / Noise) ratio of the pulse wave signal deteriorates and the error increases.

  Specifically, since the photoelectric sensor is composed of a pair of elements, that is, a light emitting element and a light receiving element as described above, when the body surface, which is a measurement site, is viewed from the normal direction, the artery is the light emitting element. The light emitting element and the light receiving element are preferably positioned and arranged so as to be sandwiched between the light receiving elements. By adopting such an arrangement position, it becomes possible to secure a large amount of light that passes through the artery, so that the S / N ratio of the obtained volume pulse wave signal can be increased.

  In such an arrangement position, the light emitting element and the light receiving element are arranged so as to sandwich the artery in a direction intersecting with the extending direction of the artery when the body surface as the measurement site is viewed from the normal direction. This is realized either in the state or when the body surface, which is the part to be measured, is viewed from the normal direction, the light emitting element and the light receiving element are arranged so as to overlap the artery in parallel with the extending direction of the artery Will be.

  In general, when measuring the volume pulse wave, it is preferable to keep the artery in a light compression state by compressing the measurement site. This is because, when the artery is in a light compression state, blood tissue volume fluctuations are larger than in a state in which no artery is compressed, and volume pulse waves can be measured with higher accuracy. As a mechanism for lightly compressing the artery, various fluid bags are often used as described above.

  In the blood pressure information measuring apparatus having the fluid bag as such a light compression mechanism, how to specifically provide the photoelectric sensor in the detection unit is a very important problem from the viewpoint of positioning described above. In this regard, in the blood pressure information measuring device disclosed in Patent Documents 1 and 2, the photoelectric sensor is directly fixed to the fluid bag by adhesion or fitting, and the blood pressure disclosed in Patent Document 3 is disclosed. In the information measuring apparatus, the photoelectric sensor is fixed to a fixed frame that is a member other than the fluid bag.

  Here, as disclosed in Patent Documents 1 and 2, when the photoelectric sensor is directly fixed to the fluid bag, when the fluid bag is pressed after the photoelectric sensor is positioned, Although it is possible to suppress the occurrence of misalignment, there is a risk that the photoelectric sensor may drop out of the fluid bag or the photoelectric sensor may be damaged due to repeated expansion and contraction of the fluid bag each time it is used. There was a problem that the apparatus could not be used stably over a period of time.

  On the other hand, when the photoelectric sensor is fixed to a member other than the fluid bag as disclosed in Patent Document 3, it is possible to prevent the photoelectric sensor from dropping off or being damaged as described above, but to prevent positional displacement. In order to pressurize the fluid bag, it is essential to inflate the fluid bag evenly. For this reason, depending on how the fluid bag is fixed to the measurement site, the photoelectric sensor is likely to be displaced due to the fluid bag expanding into a distorted shape, etc. There was a problem that could not be done stably.

  In addition, since the photoelectric sensor is a relatively small component, its assembly is not always easy, so that it can be assembled more easily when examining the assembly structure of the photoelectric sensor. Consideration is also an important consideration.

  Therefore, the present invention has been made to solve the above-described problems, and can easily assemble a photoelectric sensor, and can measure a volume pulse wave stably and with high accuracy over a long period of time. An object of the present invention is to provide a blood pressure information measuring device and a detection unit thereof.

  A detection unit for a blood pressure information measuring device according to the present invention includes a fluid bag having a compression space for compressing a measurement site, and fixing means for fixing the fluid bag by pressing the fluid bag toward the measurement site. , Including a light emitting unit and a light receiving unit, irradiating detection light from the light emitting unit toward the measurement site and receiving the detection light transmitted through the measurement site by the light reception unit, And a photoelectric sensor that outputs an output signal corresponding to the amount of light. The fluid bag further includes an accommodation space formed by joining a sheet-like member to an inner surface or an outer surface of a member constituting the compression space, and the photoelectric sensor is disposed in the accommodation space. While being accommodated, it is held by being sandwiched between the member constituting the compression space and the sheet-like member.

  In the detection unit for blood pressure information measurement device according to the present invention, it is preferable that the accommodation space is not in communication with the compression space.

  In the detection unit for a blood pressure information measurement device according to the present invention, it is preferable that the sheet-like member is joined to a member constituting the compression space by welding.

  In the detection unit for blood pressure information measurement device according to the present invention, the photoelectric sensor may be further bonded to at least one of the member and the sheet-like member constituting the compression space.

  In the detection unit for blood pressure information measurement device according to the present invention, it is preferable that the signal line connected to the photoelectric sensor is drawn out of the fluid bag without passing through the compression space. .

  In the detection unit for blood pressure information measurement device according to the present invention, it is preferable that the sheet-like member has a lower elasticity than the member constituting the compression space.

  In the detection unit for blood pressure information measurement device according to the present invention, a plurality of the accommodation spaces may be provided. In that case, the light emitting unit and the light receiving unit are provided in the plurality of accommodation spaces. It may be accommodated individually.

  A blood pressure information measuring device according to the present invention includes a detection unit for a blood pressure information measuring device according to the present invention, a pressure increasing / decreasing mechanism for increasing / decreasing the compression space, and a driving unit for causing the light emitting unit to emit light. A received light amount detector for detecting fluctuations in the amount of received light based on an output signal output from the photoelectric sensor, and a volume pulse wave for acquiring a volume pulse based on information obtained by the received light amount detector And an acquisition unit.

  The blood pressure information measurement device according to the present invention further includes a pressure detection unit that detects the pressure of the compression space, information on the volume pulse wave obtained by the volume pulse wave acquisition unit, and the pressure detection unit. A blood pressure value acquisition unit that acquires a diastolic blood pressure value and a systolic blood pressure value based on the obtained pressure information may be provided.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to assemble | attach a photoelectric sensor easily, it can be set as the blood-pressure information measuring apparatus and its detection unit which can measure a volume pulse wave stably and highly accurately over a long period of time.

It is a figure which shows schematically the structure of the functional block of the blood-pressure information measuring apparatus in Embodiment 1 of this invention. It is a schematic cross section which shows the mounting state of the detection unit for blood pressure information measuring devices in Embodiment 1 of this invention. It is a schematic plan view which shows the assembly structure of the photoelectric sensor with respect to the air bag in the detection unit for blood pressure information measuring devices shown in FIG. It is a figure which shows roughly the processing flow of the control part of the blood-pressure information measuring apparatus in Embodiment 1 of this invention. It is a schematic plan view which shows the assembly structure of the photoelectric sensor with respect to the air bag which concerns on a 1st modification. It is a schematic plan view which shows the assembly structure of the photoelectric sensor with respect to the air bag which concerns on a 2nd modification. It is a schematic plan view which shows the assembly structure of the photoelectric sensor with respect to the air bag which concerns on a 3rd modification. It is a schematic plan view which shows the assembly structure of the photoelectric sensor with respect to the air bag which concerns on a 4th modification. It is a schematic cross section which shows the mounting state of the detection unit for blood pressure information measuring devices in Embodiment 2 of this invention. It is a schematic diagram which shows the assembly structure of the photoelectric sensor with respect to the air bag in the detection unit for blood pressure information measuring devices shown in FIG. It is a schematic cross section which shows the mounting state of the detection unit for blood pressure information measuring devices in Embodiment 3 of this invention. It is a schematic cross section which shows the mounting state of the detection unit for blood pressure information measuring devices in Embodiment 4 of this invention. It is a schematic cross section which shows the mounting state of the detection unit for blood pressure information measuring devices in Embodiment 5 of this invention. It is a figure which shows roughly the structure of the functional block of the blood-pressure information measuring apparatus in Embodiment 6 of this invention. It is a schematic cross section which shows the mounting state of the detection unit for blood pressure information measuring devices in Embodiment 6 of this invention. It is a figure which shows roughly the structure of the functional block of the blood-pressure information measuring apparatus in Embodiment 7 of this invention. It is a schematic cross section which shows the mounting state of the detection unit for blood pressure information measuring devices in Embodiment 7 of this invention. It is a figure which shows roughly the processing flow of the control part of the blood-pressure information measuring apparatus in Embodiment 7 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments described below, a blood pressure information measuring device configured to be able to noninvasively measure the volume pulse wave of the radial artery extending into the wrist by adopting the wrist as the measurement site, and its The case where the present invention is applied to the detection unit will be described as an example. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a diagram schematically showing a functional block configuration of a blood pressure information measurement device according to Embodiment 1 of the present invention. First, with reference to this FIG. 1, the structure of the functional block of the blood-pressure information measuring apparatus 1A in this Embodiment is demonstrated. The blood pressure information measuring device 1A according to the present embodiment is a so-called pulse wave meter that acquires a volume pulse wave that changes every moment in real time and displays the waveform as a waveform.

  As shown in FIG. 1, a blood pressure information measurement device 1A according to the present embodiment includes a cuff 10A as a detection unit for blood pressure information measurement device, a light emitting element drive circuit 111 as a drive unit, and light reception as a received light amount detection unit. An amount detection circuit 112, a control unit 120, a memory unit 130, a display unit 140, an operation unit 150, a power supply unit 160, a pressurizing pump 171 and an exhaust valve 172 as pressure increasing / decreasing mechanisms, and a pressure sensor 173 The pressure pump drive circuit 174, the exhaust valve drive circuit 175, the oscillation circuit 176, and the air pipe 190 are mainly provided.

  The cuff 10A as a detection unit is attached to the wrist as a measurement site in order to capture the intra-arterial volume fluctuation of the radial artery, and includes a tightening belt 40 (see FIG. 2) as a fixing means, and a fluid bag. The air bag 20A and the photoelectric sensor 30 are mainly included. A specific configuration of the cuff 10A will be described later.

  The photoelectric sensor 30 is a light emitting element 31 that emits detection light toward the wrist, and a light receiving unit that receives the detection light transmitted through the wrist and outputs an output signal corresponding to the amount of the received detection light. Light receiving element 32 for optically detecting blood tissue volume fluctuations in the radial artery contained in the wrist.

  As the light emitting element 31, for example, a semiconductor light emitting element represented by an LED (Light Emitting Diode) or the like is preferably used. As the light receiving element 32, for example, a semiconductor light receiving element typified by PhD (Photo Diode) or the like is preferably used. Here, in order to detect the intra-arterial volume fluctuation with high accuracy, it is preferable to use near-infrared light that easily passes through living tissue as detection light. As the light-emitting element 31 and the light-receiving element 32, this near-infrared light is used. Those capable of projecting and receiving light are preferably used.

  More specifically, near infrared light having a wavelength of about 940 nm is particularly preferably used as detection light emitted from the light emitting element 31 and received by the light receiving element 32. The detection light is not limited to near-infrared light having a wavelength of about 940 nm, and light having a wavelength of about 450 nm or light having a wavelength of about 1100 nm can be used.

  The light emitting element drive circuit 111 is a circuit for causing the light emitting element 31 to emit light based on a control signal from the control unit 120, and causes the light emitting element 31 to emit light by applying a predetermined amount of current to the light emitting element 31. is there. As a current applied to the light emitting element 31, for example, a direct current of about 50 mA is used.

  Here, as the light emitting element driving circuit 111, a circuit that causes the light emitting element 31 to periodically emit light by supplying a pulse current to the light emitting element 31 with a predetermined duty is preferably used. When the light emitting element 31 is caused to emit light in this manner, it is possible to suppress the applied power per unit time to the light emitting element 31 and to prevent the temperature of the light emitting element 31 from rising.

  The driving frequency of the light emitting element 31 is preferably a frequency (for example, about 3 kHz) sufficiently higher than the frequency component (approximately 30 Hz) included in the intra-arterial volume fluctuation to be detected. In this way, it is possible to acquire the intra-arterial volume fluctuation more precisely.

  The received light amount detection circuit 112 is a circuit for generating a voltage signal corresponding to the received light amount based on the signal input from the light receiving element 32 and outputting the voltage signal to the control unit 120. Since the amount of light detected by the light receiving element 32 changes in proportion to the internal volume of the artery, the voltage signal generated by the received light amount detection circuit 112 also changes in proportion to the internal volume of the artery. The volume pulse wave is captured as a voltage value fluctuation.

  Here, the received light amount detection circuit 112 includes processing circuits such as an analog filter circuit, an amplifier circuit, and an A / D (Analog / Digital) conversion circuit, and is a voltage obtained by digitizing a signal input as an analog value. Output as a signal.

  The pressure pump 171, the exhaust valve 172, and the pressure sensor 173 are each connected to the air bag 20 </ b> A via the air pipe 190. The pressurizing pump 171 is a pressurizing unit for inflating the air bladder 20A by sending air, and the exhaust valve 172 is a decompressing unit for exhausting the air to the outside and contracting the air bladder 20A in the open state. It is. The exhaust valve 172 also functions as pressure maintaining means for maintaining the pressure in the air bladder 20A in the closed state.

  The pressurization pump drive circuit 174 is a circuit for controlling the operation of the pressurization pump 171 based on a control signal input from the control unit 120. The exhaust valve drive circuit 175 is a circuit for controlling the opening / closing operation of the exhaust valve 172 based on the control signal input from the control unit 120.

  The pressure sensor 173 is, for example, a capacitance type pressure sensor, and its capacitance value changes according to the pressure inside the air bag 20A (hereinafter also referred to as cuff pressure). The oscillation circuit 176 is a circuit for generating a signal having an oscillation frequency corresponding to the capacitance value of the pressure sensor 173 and inputting the generated signal to the control unit 120.

  The control unit 120 is means for controlling the entire blood pressure information measurement apparatus 1A, and is configured by, for example, a CPU (Central Processor Unit). The memory unit 130 is configured by a ROM (Read-Only Memory) or a RAM (Random-Access Memory), and stores a program for causing the control unit 120 or the like to execute a processing flow for volume pulse wave measurement. Or means for recording measurement results or the like.

  The display unit 140 is configured by, for example, an LCD (Liquid Crystal Display) or the like, and is a means for displaying measurement results and the like. The operation unit 150 is a means for accepting an operation by a subject or the like and inputting a command from the outside to the control unit 120. The power supply unit 160 is means for supplying power to the control unit 120.

  The control unit 120 inputs volumetric pulse wave information as a measurement result to the memory unit 130 and the display unit 140, and sends control signals for driving the pressurization pump 171 and the exhaust valve 172 to the pressurization pump drive circuit 174 and the exhaust. Each is input to the valve drive circuit 175.

  In addition, the control unit 120 includes a pressure detection unit 122 that detects the internal pressure of the air bag 20A. The pressure detection unit 122 detects the internal pressure of the air bag 20A based on a signal input from the oscillation circuit 176. Thus, the pressure applied to the wrist by the air bag 20A is measured.

  In addition, the control unit 120 inputs a control signal for driving the light emitting element 31 to the light emitting element driving circuit 111. Further, the control unit 120 includes a volume pulse wave acquisition unit 121 for acquiring a volume pulse wave. The volume pulse wave acquisition unit 121 is based on a voltage signal input from the received light amount detection circuit 112. Acquire a volume pulse wave. The volume pulse wave information acquired by the volume pulse wave acquisition unit 121 is input to the memory unit 130 and the display unit 140 as a measurement result.

  FIG. 2 is a schematic cross-sectional view showing a mounted state of the detection unit for a blood pressure information measurement device according to the present embodiment, and FIG. 3 is a schematic plan view showing the assembly structure of the photoelectric sensor to the air bag. The wrist cross section shown in FIG. 2 is a cross section when the wrist of the left hand is viewed from the central side toward the distal side with the cuff attached to the wrist of the left hand, and FIG. It is a top view at the time of seeing an air bag from the side in which it is located. Next, with reference to FIG. 2 and FIG. 3, the configuration of the cuff 10 </ b> A as the detection unit for the blood pressure information measurement device and the assembly structure of the photoelectric sensor 30 in the present embodiment will be specifically described.

  As shown in FIG. 2, the radius 210 and the ulna 220 are located inside the wrist 200, and the radial artery 212, the ulnar artery 222, and the tendon 230 are located in the surface layer portion of the wrist 200. The tendon 230 is located between the radial artery 212 and the ulnar artery 222. The cuff 10A as the detection unit in the present embodiment is used by being wound around the wrist 200 including these biological tissues, and the radial artery 212 of the two arteries is selectively used by using the air bag 20A. The volume pulse wave is measured under pressure.

  As described above, the cuff 10A mainly includes the fastening belt 40, the air bag 20A, and the light emitting element 31 and the light receiving element 32 as the photoelectric sensor 30. The fastening belt 40 is used to stably fix the air bag 20A and the photoelectric sensor 30 to the wrist 200 by being fastened to the wrist 200, and is composed of a long band-shaped member. The tightening belt 40 is fixed to the wrist 200 by a surface fastener or the like (not shown) while being wound around the wrist 200.

  The air bag 20A is provided at a predetermined position on the inner peripheral surface of the tightening belt 40 so as to be disposed on the body surface of the portion located immediately above the radial artery 212 in the mounted state, and the compression space 22 is provided therein. It is comprised by the bag-shaped member 21 which has. The above-described air pipe 190 is connected to the compression space 22 via a nipple (not shown), and thereby the pressure space 22 is pressurized and depressurized by the above-described pressure pump 171 and the exhaust valve 172.

  The bag-like member 21 is preferably formed by using a resin-made sheet-like member, and is produced, for example, by stacking two sheet-like members and welding their peripheral edges. Any material can be used as the specific material of the bag-like member 21 as long as it is highly stretchable and does not leak after welding. A combined (EVA) resin, a soft vinyl chloride (PVC) resin, a polyurethane (PU) resin, a polyamide (PA) resin, and the like can be particularly preferably used.

  As shown in FIGS. 2 and 3, the outer surface of the bag-like member 21 located on the wrist 200 side in the wearing state (that is, the outer surface of the bag-like member 21 located on the inner side in the wearing state) A sheet-like member 23 is attached. The sheet-like member 23 has a rectangular shape in plan view, and its three sides are joined to the bag-like member 21 by welding or the like.

  As a result, joint portions 25 are formed along the periphery of the three sides of the sheet-like member 23, and the air bag 20 </ b> A has a pocket-like shape due to the bag-like member 21 and the sheet-like member 23. The accommodation space 24 is formed. Here, the accommodation space 24 and the compression space 22 are separated from each other by being separated by the bag-like member 21. Since the remaining side of the sheet-like member 23 is not joined to the bag-like member 21, an opening 26 is formed at that portion. Thereby, the accommodation space 24 is opened to the outside through the opening 26.

  As specific materials of the sheet-like member 23, ethylene-vinyl acetate copolymer (EVA) resin, soft vinyl chloride (PVC) resin, polyurethane (PU) resin, polyamide (PA) resin, and the like can be used particularly preferably. However, for example, if the same material as the bag-like member 21 described above is used, it can be easily joined to the bag-like member 21 by welding or the like. In addition, the sheet-like member 23 and the bag-like member 21 may be joined by adhesion or the like in addition to the above-described welding.

  The end portion of the flexible wiring board 34 is inserted into the storage space 24 by inserting the end portion of the flexible wiring board 34 through the opening 26 described above. The light emitting element 31 and the light receiving element 32 described above are mounted on the surface of the end portion of the flexible wiring board 34 accommodated in the accommodating space 24.

  The connection terminals provided in each of the light emitting element 31 and the light receiving element 32 are electrically connected to a wiring pattern 35 that is a signal line provided on the flexible wiring board 34 by, for example, soldering. Are electrically connected to the above-described light emitting element driving circuit 111 and received light amount detecting circuit 112, respectively.

  The end portion of the flexible wiring board 34 on which the light emitting element 31 and the light receiving element 32 are mounted is held by being sandwiched between the bag-like member 21 and the sheet-like member 23 of the portion constituting the accommodation space 24. Here, if the size of the end portion of the flexible wiring board 34 is substantially equal to the size of the accommodation space 24 (strictly, a size slightly smaller than the size of the accommodation space 24 is preferable). The end portion of the flexible wiring board 34 is stably held by the frictional force generated between the members, whereby the photoelectric sensor 30 is fixedly attached to the air bag 20A.

  If necessary, the end portion of the flexible wiring board 34 on which the light emitting element 31 and the light receiving element 32 are mounted is further fixed to the bag-like member 21 and / or the sheet-like member 23 using an adhesive or the like. Thus, the photoelectric sensor 30 may be bonded and fixed directly or indirectly to the air bag 20A.

  FIG. 4 is a diagram schematically showing a processing flow of the control unit of the blood pressure information measurement device according to the present embodiment. Next, with reference to FIG. 4, a processing flow of the control unit 120 in the blood pressure information measurement device 1A in the present embodiment will be described. A program according to this processing flow is stored in advance in the memory unit 130 shown in FIG. 1, and the processing flow is advanced by the control unit 120 reading out and executing this program from the memory unit 130.

  As illustrated in FIG. 4, when the operation unit 150 of the blood pressure information measurement device 1 </ b> A is operated and a power-on command is input, power is supplied from the power supply unit 160 to the control unit 120, thereby the control unit 120. Is driven to initialize the blood pressure information measuring apparatus 1A (step S101). Here, the subject wears the cuff 10A as the detection unit described above on the wrist 200 in advance.

  Next, when the operation button of the operation unit 150 of the blood pressure information measurement device 1A is operated and a measurement start command is input, the control unit 120 adds the pressure via the pressurization pump drive circuit 174 and the exhaust valve drive circuit 175. The pressurization of the air bag 20A is started by controlling the driving of the pressure pump 171 and the exhaust valve 172. As a result, air is fed into the air bag 20A, and light compression of the wrist 200 is started by the air bag 20A (step S102).

  Here, pressurization of air bag 20A using pressurization pump 171 is performed until air bag 20A reaches a predetermined internal pressure. More specifically, the air bag 20A is pressurized to such an extent that the radial artery 212 included in the wrist 200 can be lightly compressed, and thereafter, the internal pressure of the air bag 20A is maintained and the light compression state is maintained. Retained.

  Next, the control unit 120 starts driving the light emitting element 31 via the light emitting element driving circuit 111 (step S103). As a result, the detection light is emitted from the light emitting element 31 toward the wrist 200 including the radial artery 212. In parallel with the driving of the light emitting element 31, the received light amount detection circuit 112 generates a digitalized voltage signal based on the signal input from the light receiving element 32 (step S104). Is input.

  The control unit 120 acquires the volume pulse wave in the volume pulse wave acquisition unit 121 based on the input voltage signal (step S105). The control unit 120 stores the acquired volume pulse wave as a measurement result in the memory unit 130 (step S106), and then displays it on the display unit 140 (step S107). Here, the display unit 140 displays the volume pulse wave as, for example, a waveform.

  The series of operations consisting of step S104 to step S107 is repeated until a predetermined stop condition (for example, input of a measurement stop command or elapse of a set time by a timer circuit) is satisfied (NO in step S108). in the case of).

  When a predetermined stop condition is satisfied (YES in step S108), control unit 120 instructs light emitting element drive circuit 111 to release driving of light emitting element 31, and opens exhaust valve 172 to an open state. Issue a command to As a result, the driving of the light emitting element 31 is stopped (step S109), the air in the air bag 20A is exhausted, and the light compression state on the wrist 200 is released (step S110).

  Then, the blood pressure information measurement device 1 </ b> A takes a standby state, and waits for an input of a power-off command from the operation unit 150 and stops supplying power. As described above, the volume pulse wave of the radial artery 212 that changes every moment can be acquired in real time.

  As described above, in the cuff 10A as the detection unit for the blood pressure information measurement device in the present embodiment and the blood pressure information measurement device 1A provided with the cuff 10A, the bag-like member 21 constituting the compression space 22 A pocket-shaped accommodation space 24 is formed by joining the sheet-like member 23 to the outer surface on the wrist 200 side, and the flexible wiring board 34 in which the light emitting element 31 and the light receiving element 32 are mounted in the accommodation space 24. By inserting the end portion, the photoelectric sensor 30 is sandwiched and held by a predetermined portion of the air bag 20A.

  For this reason, the photoelectric sensor 30 can be directly fixed to the air bag 20A, so that it is difficult for the photoelectric sensor 30 to be displaced during pressurization of the air bag 20A after positioning, and the volume pulse wave is highly accurate. In addition to being able to measure, it is possible to prevent problems such as the photoelectric sensor 30 being dropped from the air bag 20A and the photoelectric sensor 30 being damaged due to repeated use.

  Further, since the photoelectric sensor 30 can be fixed to the air bag 20A simply by inserting the end portion of the flexible wiring board 34 into the accommodation space 24, the photoelectric sensor 30 can be assembled very easily. As a result, assembly work can be greatly simplified.

  Further, if the above configuration is adopted, the signal line connected to the photoelectric sensor 30 can be pulled out without being inserted through the compression space 22. Therefore, since an operation such as providing an opening or the like in the bag-like member 21 and inserting the signal line and then performing an airtight process on the opening through which the signal line is inserted is not necessary, the assembly operation is simplified. In addition, the airtightness of the compression space 22 can be maintained high.

  Therefore, by adopting the above configuration, the blood pressure information measuring apparatus 1A and its detection unit that can easily assemble the photoelectric sensor 30 and can stably measure the volume pulse wave over a long period of time. As cuff 10A.

  If the above-described sheet-like member 23 is made less stretchable than the bag-like member 21, the expansion of the bag-like member 21 at the portion where the sheet-like member 23 is joined is suppressed when the air bag 20A is inflated. As a result, the movement of the portion along the surface of the wrist 200 is restricted. Therefore, when the air bag 20A is pressurized after positioning, the photoelectric sensor 30 is less likely to be displaced, and the volume pulse wave can be measured with higher accuracy.

  FIGS. 5 to 8 are schematic plan views showing the assembly structure of the photoelectric sensor to the air bag according to the first to fourth modifications. 5 to 8 are plan views when the air bag is viewed from the side where the wrist is positioned in the mounted state. Next, the assembly structure of the photoelectric sensor 30 with respect to the air bags 20B to 20E according to the first to fourth modifications based on the first embodiment of the present invention described above will be described with reference to FIGS. To do.

  As shown in FIG. 5, in the air bag 20 </ b> B according to the first modified example, a single sheet-like member 23 having a rectangular shape in plan view attached to the outer surface of the bag-like member 21 is not limited to its three sides. In addition, the substantially central portion is joined by welding or the like so as to partition the accommodating space 24, and a partition portion 25a is formed in the portion. Thereby, a pair of accommodation space 24, 24 divided by the partition part 25a is open | released with respect to the exterior via opening part 26a, 26b, respectively.

  On the other hand, the end portion of the flexible wiring board 34 is bifurcated, and the light emitting element 31 is mounted on one of the branched ends, and the light receiving element 32 is mounted on the other end. Then, one of the branched ends of the flexible wiring board 34 is inserted into one of the pair of accommodating spaces 24, 24 via the opening 26a, and the other of the branched ends of the flexible wiring board 34 is inserted. The other of the pair of housing spaces 24, 24 is inserted through the opening 26b.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20B, so that the same effect as the effect described in the first embodiment of the present invention is obtained. be able to.

  As shown in FIG. 6, the air bag 20 </ b> C according to the second modification has a configuration in which two sheet-like members 23, 23 having a rectangular shape in plan view are attached to the outer surface of the bag-like member 21. The three sides of each sheet-like member 23, 23 are joined to the bag-like member 21 by welding or the like. As a result, two accommodation spaces 24, 24 are formed in the air bag 20C, and these two accommodation spaces 24, 24 are opened to the outside through the openings 26, 26, respectively. It will be.

  On the other hand, the end portion of the flexible wiring board 34 is bifurcated, and the light emitting element 31 is mounted on one of the branched ends, and the light receiving element 32 is mounted on the other end. Then, one of the branched ends of the flexible wiring board 34 is inserted into one of the two accommodation spaces 24, 24 via the opening 26, and the other of the branched ends of the flexible wiring board 34 is inserted. The other accommodation space 24, 24 is inserted into the other through the opening 26.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20C, and thus the same effect as the effect described in the first embodiment of the present invention described above is obtained. be able to.

  As shown in FIG. 7, in the air bag 20D according to the third modified example, a single sheet-like member 23 having a rectangular shape in plan view is attached to the outer surface of the bag-like member 21, and the sheet The four sides of the member 23 are joined to the bag member 21 by welding or the like. In addition, a slit-like opening 26c is provided at a predetermined position of the sheet-like member 23 attached to the bag-like member 21, so that the accommodating space 24 is externally connected to the outside via the opening 26c. It is open. And the edge part of the flexible wiring board 34 in which the photoelectric sensor 30 was mounted is inserted in the accommodation space 24 through the said opening part 26c.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20D, and thus the same effect as the effect described in the first embodiment of the present invention described above is obtained. be able to.

  As shown in FIG. 8, in the air bag 20E according to the fourth modified example, a single sheet-like member 23 having a rectangular shape in plan view is attached to the outer surface of the bag-like member 21, Three sides of the member 23 are joined to the bag member 21 by welding or the like. Moreover, since the remaining one side of the sheet-like member 23 is not joined to the bag-like member 21, an opening 26 is formed in that portion. Thereby, the accommodation space 24 is opened to the outside through the opening 26.

  On the other hand, one light emitting element 31 and three light receiving elements 32, 32, 32 are mounted on the end portion of the flexible wiring board 34, and the one light emitting element 31 and the three light receiving elements 32, 32, 32 are provided. The end of the mounted flexible wiring board 34 is inserted into the accommodation space 24 through the opening 26.

  Even when configured in this manner, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20E, and thus the same effect as the effect described in the first embodiment of the present invention described above is obtained. be able to. If a plurality of light receiving elements 32 are provided as described above, the amount of detection light received is increased, and not only can the volume pulse wave be measured more precisely, but also the positioning when the cuff 10A is mounted. The degree of freedom is also increased, and the volume pulse wave can be acquired more easily and with high accuracy.

  The number of the light emitting elements 31 and the light receiving elements 32 is not limited to this. A plurality of the light emitting elements 31 may be provided, and the number of the light receiving elements 32 may be singular, or a plurality of both the light emitting elements 31 and the light receiving elements 32 may be provided. It is good also as providing. Also in this case, the detection light can be increased, so that not only can the volume pulse wave be measured more precisely, but also the degree of freedom in positioning when the cuff 10A is attached is increased.

(Embodiment 2)
FIG. 9 is a schematic cross-sectional view showing a mounting state of the detection unit for a blood pressure information measurement device according to Embodiment 2 of the present invention, and FIG. 10 is a schematic plan view showing an assembly structure of the photoelectric sensor to the air bag. . Hereinafter, with reference to FIG. 9 and FIG. 10, the configuration of the cuff 10 </ b> B as the detection unit for the blood pressure information measurement device and the assembly structure of the photoelectric sensor 30 in the present embodiment will be specifically described. The cuff 10B as the detection unit in the present embodiment can be replaced with the cuff 10A in the blood pressure information measurement device 1A in the first embodiment of the present invention described above.

  As shown in FIGS. 9 and 10, the cuff 10 </ b> B as the detection unit in the present embodiment mainly includes a fastening belt 40, an air bag 20 </ b> F, and a light emitting element 31 and a light receiving element 32 as the photoelectric sensor 30. The sheet-like member 23 is attached to the inner surface of the portion of the bag-like member 21 located on the wrist 200 side in the attached state (that is, the inner surface of the portion of the bag-like member 21 located on the inner side in the attached state). This is different from the cuff 10A according to the first embodiment of the present invention described above. The sheet-like member 23 has a rectangular shape in plan view, and its four sides are joined to the bag-like member 21 by welding or the like.

  As a result, the joint portions 25 are formed along the peripheral edges of the four sides of the sheet-like member 23, and the air bag 20 </ b> F has the accommodation space 24 by the bag-like member 21 and the sheet-like member 23. Will be formed. Here, the accommodation space 24 and the compression space 22 are separated from each other by being separated by the sheet-like member 23.

  In addition, a slit-like opening 26d is provided at a predetermined position of the bag-like member 21 where the sheet-like member 23 is attached. Thereby, the accommodating space 24 is open to the outside through the opening 26d. And the edge part of the flexible wiring board 34 in which the photoelectric sensor 30 was mounted is inserted in the accommodation space 24 through the said opening part 26d.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20F, and thus the same effect as the effect described in the first embodiment of the present invention described above is obtained. be able to.

(Embodiment 3)
FIG. 11 is a schematic cross-sectional view showing a mounted state of the detection unit for blood pressure information measurement device according to Embodiment 3 of the present invention. Hereinafter, the configuration of the cuff 10C as the detection unit for blood pressure information measurement device and the assembly structure of the photoelectric sensor 30 in the present embodiment will be specifically described with reference to FIG. The cuff 10C as the detection unit in the present embodiment can be replaced with the cuff 10A in the blood pressure information measuring device 1A in the first embodiment of the present invention described above.

  As shown in FIG. 11, the cuff 10C as a detection unit in the present embodiment mainly includes a fastening belt 40, an air bag 20G, a light emitting element 31 and a light receiving element 32 as a photoelectric sensor 30, and is attached. One sheet-like member 23 is attached to the inner surface of the portion of the bag-like member 21 that is not located on the wrist 200 side in the state (that is, the inner surface of the portion of the bag-like member 21 that is located outside in the mounted state). Only in the point, it is different from the cuff 10B in the second embodiment of the present invention described above.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20G, and thus the same effect as the effect described in the first embodiment of the present invention described above is obtained. be able to.

(Embodiment 4)
FIG. 12 is a schematic cross-sectional view showing a mounted state of the detection unit for blood pressure information measurement device according to Embodiment 4 of the present invention. Hereinafter, the configuration of the cuff 10D as the detection unit for the blood pressure information measurement device and the assembly structure of the photoelectric sensor 30 in the present embodiment will be specifically described with reference to FIG. The cuff 10D as the detection unit in the present embodiment can be replaced with the cuff 10A in the blood pressure information measurement device 1A in the first embodiment of the present invention described above.

  As shown in FIG. 12, the cuff 10D as the detection unit in the present embodiment mainly includes a fastening belt 40, an air bag 20H, a light emitting element 31 and a light receiving element 32 as the photoelectric sensor 30, and is attached. One sheet-like member 23 is attached to the outer surface of the portion of the bag-like member 21 that is not located on the wrist 200 side in the state (that is, the outer surface of the portion of the bag-like member 21 that is located outside in the mounted state). Only in the point, it is different from the cuff 10A in the first embodiment of the present invention described above.

  Even when configured in this manner, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20H, so that the same effect as that described in the first embodiment of the present invention is obtained. be able to.

(Embodiment 5)
FIG. 13 is a schematic cross-sectional view showing a mounting state of the detection unit for blood pressure information measurement device according to Embodiment 5 of the present invention. Hereinafter, the configuration of the cuff 10E as the detection unit for the blood pressure information measurement device according to the present embodiment will be specifically described with reference to FIG. The cuff 10E as the detection unit in the present embodiment can be replaced with the cuff 10A in the blood pressure information measurement device 1A in the first embodiment of the present invention described above.

  As shown in FIG. 13, the cuff 10E as the detection unit in the present embodiment is different in the configuration of the fixing means when compared with the cuff 10A in the first embodiment of the present invention described above. In the cuff 10A according to the first embodiment of the present invention described above, the fixing means is configured by only the tightening belt 40. However, in the cuff 10E according to the present embodiment, the fixing means is the tightening belt 40 and A belt-shaped member made of the freely deformable member 42 is used.

  Specifically, the freely deformable member 42 has a plurality of parts having substantially the same shape arranged in the circumferential direction, and adjacent parts among the plurality of parts arranged in the circumferential direction are rotated by a connecting pin. It has a connected structure. As a result, the freely deformable member 42 is configured to be changeable into an arbitrary shape, and fits to the wrist 200 in the mounted state.

  An insertion hole 42a1 is provided in a part 42a located at one end portion in the circumferential direction of a freely deformable member 42 formed by connecting a plurality of parts, and the other end portion in the circumferential direction of the freely deformable member 42 is provided. The positioned part 42b is provided with an insertion hole 42b1.

  In addition, a mounting portion 42c1 that protrudes toward the outside is provided on the part 42c that is located in the middle portion of the universally deformable member 42 in the circumferential direction. One end of the tightening belt 40 is fixed to the attachment portion 42c1 provided in the part 42c.

  The tightening belt 40 is wound so as to cover the portion near the other end of the freely deformable member 42 in the mounted state, and from the outside with respect to the insertion hole 42b1 provided in the part 42b located at the other end of the freely deformable member 42. It is inserted toward the inside and further inserted from the inside to the outside with respect to an insertion hole 42a1 provided in a part 42a located at one end of the freely deformable member 42.

  Then, the tightening belt 40 is inserted into an insertion hole 42a1 provided in a part 42a located at one end portion of the freely deformable member 42 so as to be hooked on one end portion of the freely deformable member 42. The folded portion is folded back to the base point, and the folded portion is overlapped with the tightened belt 40 of the unfolded portion, thereby being fixed by a surface fastener or the like (not shown).

  The air bag 20A is provided at a predetermined position on the inner peripheral surface of the freely deformable member 42 so as to be disposed on the body surface of the portion located immediately above the radial artery 212 in the mounted state. The configuration of air bag 20A is the same as that in the first embodiment of the present invention described above.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20A, and thus the same effect as the effect described in the first embodiment of the present invention described above is obtained. be able to.

(Embodiment 6)
FIG. 14 is a diagram schematically showing a functional block configuration of the blood pressure information measurement device according to the sixth embodiment of the present invention, and FIG. 15 shows a mounting state of the detection unit for the blood pressure information measurement device according to the present embodiment. It is a schematic cross section shown. Hereinafter, with reference to these FIG. 14 and FIG. 15, the blood pressure information measuring device 1B and the detection unit 10F provided in the same according to the present embodiment will be described. Note that the blood pressure information measurement device 1B in the present embodiment also acquires a volume pulse wave that changes from time to time in real time in the same manner as the blood pressure information measurement device 1A in the first embodiment of the present invention described above. Is a so-called pulse wave meter.

  As shown in FIG. 14, the blood pressure information measuring device 1B in the present embodiment has a configuration of a pressure increasing / decreasing mechanism that pressurizes and depressurizes the air bag 20A as compared with the blood pressure information measuring device 1A in the first embodiment of the present invention described above. Is different. Specifically, the blood pressure information measurement device 1B according to the present embodiment includes an actuator 177 instead of the pressurization pump 171 and the exhaust valve 172 as the pressure increase / decrease mechanism. Accordingly, as shown in FIG. 15, the detection unit 10F to be provided in the blood pressure information measurement device 1B is also largely configured as the cuff 10A as the detection unit in the first embodiment of the present invention described above. It is different.

  As shown in FIG. 14, the blood pressure information measurement device 1B further includes an encoder 178 and an actuator drive circuit 179 in addition to the actuator 177 described above. The actuator 177 is means for pressing the air bag 20A attached to the wrist 200 toward the wrist 200, and has a drive shaft 177a (see FIG. 15). The actuator drive circuit 179 is a circuit for driving the actuator 177 based on the control signal of the control unit 120, and the encoder 178 detects the position of the drive shaft 177 a of the actuator 177 and detects the detected position information. It is a means to output to.

  As shown in FIG. 15, the detection unit 10 </ b> F includes a mounting table 52 and a support frame 54. The mounting table 52 is a table on which the wrist 200 is mounted, and the support frame 54 is a machine frame disposed on the mounting table 52. The mounting table 52 has a recess 52a capable of holding the wrist 200 at a predetermined position on the upper surface thereof, and the recess 52a is formed in a shape capable of holding the wrist 200 in an inclined posture. Yes.

  More specifically, the concave portion 52a is asymmetric in a cross section intersecting with the direction in which the concave portion 52a extends, so that the radial artery is in a state where the wrist 200 is accommodated in the concave portion 52a. The wrist surface of the part where 212 is located is held in a state of facing upward.

  An actuator 177 serving as a pressure increasing / decreasing mechanism is assembled at a predetermined position above the support frame 54. The main body of the actuator 177 is fixed to the support frame 54 so that the drive shaft 177 a extends toward the wrist 200 mounted on the mounting table 52. The pressing block 50 is fixed to the tip of the drive shaft 177a of the actuator 177. By driving the actuator 177, the pressing block 50 moves in the direction of arrow A in the figure.

  The pressing block 50 has a pressing surface at the lower end located on the wrist 200 side, and the pressing surface is curved so as to follow the surface of the wrist 200. The width of the pressing surface in the direction along the circumferential direction of the wrist 200 is preferably set to a size that covers the radial artery 212 and the living tissue in the vicinity thereof.

  An air bag 20 </ b> A is attached to the pressing surface of the pressing block 50. The air bag 20A has a compression space 22 inside, and the compression space 22 is sealed with a predetermined amount of air in advance. The configuration of air bag 20A is the same as that in the first embodiment of the present invention described above. In the present embodiment, an air bag in which air is sealed in the compression space 22 is adopted as the fluid bag. However, other fluids (for example, gas or liquid other than air, It is also possible to use a fluid bag in which a gel or the like is enclosed.

  In the blood pressure information measurement device 1B according to the present embodiment described above, the control unit 120 controls the driving of the actuator 177 via the actuator driving circuit 179 when the wrist 200 is placed on the placing table 52. By doing so, the air bag 20 </ b> A is pressed against the wrist 200. Thus, the air bag 20A is compressed by the pressing block 50 and the wrist 200, and the wrist 200 is lightly compressed by the air bag 20A.

  The volume pulse wave of the radial artery 212 that changes momentarily is generated by the light emitting element 31 and the light receiving element 32 as the photoelectric sensor 30 assembled to the air bag 20A while maintaining the state in which the wrist 200 is lightly compressed. It will be acquired in real time.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20A, and thus the same effect as the effect described in the first embodiment of the present invention described above is obtained. be able to.

(Embodiment 7)
FIG. 16 is a diagram schematically showing a functional block configuration of the blood pressure information measurement device according to the seventh embodiment of the present invention, and FIG. 17 shows a mounting state of the detection unit for the blood pressure information measurement device according to the present embodiment. It is a schematic cross section shown. Hereinafter, with reference to these FIG. 16 and FIG. 17, the structure of the blood pressure information measuring device 1C in the present embodiment and the cuff 10G as a detection unit provided therein will be described. The blood pressure information measuring device 1C according to the present embodiment is a so-called sphygmomanometer having a volume vibration type blood pressure value acquisition function.

  As shown in FIG. 16, the blood pressure information measurement device 1C in the present embodiment includes a volume pulse wave acquisition unit 121 and a control unit 120, as compared with the blood pressure information measurement device 1A in the first embodiment of the present invention described above. In addition to the pressure detection unit 122, a blood pressure value acquisition unit 123 is further provided. Based on the information on the volume pulse wave obtained by the volume pulse wave obtaining unit 121 and the pressure information obtained by the pressure detecting unit 122, the blood pressure value obtaining unit 123 is based on the systolic blood pressure value and the diastolic blood pressure value. Is something to get.

  Here, the systolic blood pressure value and the diastolic blood pressure value correlate with the point that the pulsation of the artery (that is, fluctuation of the pulse wave) changes significantly in the process of changing the compression force applied to the artery. Measurement can be performed by applying a predetermined algorithm.

  The blood pressure information measuring device 1C in the present embodiment includes a pressure increasing / decreasing mechanism having the same configuration as the blood pressure information measuring device 1A in the first embodiment of the present invention described above, and the radial artery is used by using this pressure increasing / decreasing mechanism. The pressure force generated by the air bag 20I on the air bag 212 is varied, and the volume pulse wave is acquired while detecting the pressure force as the internal pressure (cuff pressure) of the air bag 20I. Based on this, the blood pressure value acquiring unit 123 described above is acquired. The systolic blood pressure value and the diastolic blood pressure value are acquired at.

  As shown in FIG. 17, the cuff 10G as the detection unit in the present embodiment is larger in the circumferential direction of the wrist 200 of the bag-like member 21 when compared with the cuff 10A in the first embodiment of the present invention described above. There is a difference. Specifically, in the cuff 10G, not only the body surface of the wrist 200 where the radial artery 212 is located, but also the body surface of the wrist 200 where the radius 210 and the ulna 220 are located in the wearing state. The length is increased along the circumferential direction.

  On the other hand, the size in the circumferential direction of the sheet-like member 23 attached to the bag-like member 21 is positioned immediately above the radial artery 212 in the mounted state, as in the case of the cuff 10A in the first embodiment of the present invention described above. The size is such that it covers only the vicinity of the body surface of the wrist 200 of the portion to be performed.

  Further, the cuff 10G in the present embodiment further has a curler 44 in addition to the tightening belt 40 as a fixing means. The curler 44 is an addressing member addressed so as to surround the wrist 200 in the mounted state, and is disposed inside the fastening belt 40 and outside the air bag 20I.

  The curler 44 is formed of a curved elastic plate formed in a substantially cylindrical shape so as to have a shape along the wrist 200, and is configured to be elastically deformable in the radial direction while maintaining its cylindrical shape. The curler 44 is composed of a member having higher rigidity than the air bag 20I. For example, the curler 44 is an injection-molded product made of polypropylene (PP) resin or the like, or a metal such as aluminum (Al) or an alloy thereof, brass or the like. A press-molded product made of a material can be suitably used.

  In this way, the size of the bag-shaped member 21 in the circumferential direction is lengthened, and the curler 44 is added to the cuff 10G as the detection unit, so that most of the wrist 200 is stretched along the circumferential direction at the time of measurement. Since it is possible to compress evenly, the radial artery 212 can be compressed more uniformly over the entire region in the circumferential direction. This makes it possible to measure the blood pressure value with higher accuracy.

  FIG. 18 is a diagram schematically showing a processing flow of the control unit of the blood pressure information measurement device according to the present embodiment. Next, with reference to FIG. 18, a processing flow of the control unit 120 in the blood pressure information measurement device 1C in the present embodiment will be described. Note that the program according to this processing flow is stored in advance in the memory unit 130 shown in FIG. 16, and the processing flow is advanced when the control unit 120 reads out and executes this program from the memory unit 130.

  As illustrated in FIG. 18, when the operation unit 150 of the blood pressure information measurement device 1 </ b> C is operated and a power-on command is input, power is supplied from the power supply unit 160 to the control unit 120, thereby the control unit 120. Is driven to initialize the blood pressure information measuring apparatus 1C (step S201). Here, the subject wears the cuff 10G as the detection unit described above on the wrist 200 in advance.

  Next, when the operation button of the operation unit 150 of the blood pressure information measurement apparatus 1C is operated and a measurement start command is input, the control unit 120 adds the pressure via the pressurization pump drive circuit 174 and the exhaust valve drive circuit 175. The pressure pump 171 and the exhaust valve 172 are driven, thereby starting to send air to the air bag 20I and gradually increasing the cuff pressure (step S202).

  At that time, the cuff pressure is detected by the pressure sensor 173. When it is detected that the cuff pressure has reached a predetermined level, the control unit 120 stops driving the pressurizing pump 171 and then closes it. The exhaust valve 172 is gradually opened to gradually exhaust the air in the air bag 20I, and the cuff pressure is gradually reduced (step S203).

  In the process of reducing the cuff pressure, the control unit 120 starts driving the light emitting element 31 via the light emitting element driving circuit 111 (step S204), whereby the light emitting element 31 is directed toward the wrist 200 including the radial artery 212. The detection light is irradiated.

  At that time, in parallel with the driving of the light emitting element 31, the received light amount detection circuit 112 generates a digitalized voltage signal based on the signal input from the light receiving element 32 (step S205). Input to the controller 120. At that time, the control unit 120 detects pressure information output from the pressure sensor 173 via the oscillation circuit 176 (step S206). As described above, the volume pulse wave is acquired by the volume pulse wave acquisition unit 121 and the cuff pressure is acquired by the pressure detection unit 122 (steps S207 and S208).

  The series of operations consisting of Steps S205 to S208 is repeated until a predetermined stop condition (for example, the elapse of a set time by the timer circuit or the cuff pressure is reduced to a predetermined level) is satisfied (for example). If NO in step S209). When a predetermined stop condition is satisfied (YES in step S209), control unit 120 instructs light emitting element drive circuit 111 to release driving of light emitting element 31 (S210).

  Thereafter, the control unit 120 controls the driving of the exhaust valve 172 via the exhaust valve drive circuit 175 to perform rapid exhaust of the air bag 20I, thereby releasing the compression of the radial artery 212 by the air bag 20I (step S211). ).

  Then, the control unit 120 inputs the volume pulse wave obtained in step S207 to the blood pressure value acquisition unit 123, and inputs the cuff pressure obtained in step S208 to the blood pressure value acquisition unit 123, based on this. The systolic blood pressure value and the diastolic blood pressure value are acquired (step S212). Here, the blood pressure value acquisition unit 123 acquires the systolic blood pressure value and the diastolic blood pressure value by applying a predetermined algorithm to the volume pulse wave acquired in the process of changing the compression force by the cuff. .

  Subsequently, the control unit 120 stores the systolic blood pressure value and the diastolic blood pressure value acquired by the blood pressure value acquiring unit 123 in the memory unit 130 as measurement results (step S213), and then the measurement is performed by the display unit 140. The result is displayed (step S214). Here, the display unit 140 displays the systolic blood pressure value and the diastolic blood pressure value as numerical values, for example.

  After recording and displaying these blood pressure information, the blood pressure information measuring apparatus 1 </ b> C takes a standby state, and waits for an input of a power-off command from the operation unit 150 and stops supplying power. As described above, the systolic blood pressure value and the diastolic blood pressure value can be acquired. In addition, although the case where the decompression measurement method which measures a blood pressure value in the decompression process was applied in the above example, the pressurization measurement method which measures the blood pressure value in the pressurization process may be applied.

  Even in such a configuration, the photoelectric sensor 30 is sandwiched and held by the predetermined portion of the air bag 20I, so that the same effect as that described in the first embodiment of the present invention is obtained. be able to.

  In the embodiment of the present invention described above and its modification, the light emitting element and the light receiving element as the photoelectric sensor are mounted on the flexible wiring board, and the end of the flexible wiring board on which the photoelectric sensor is mounted is mounted. Although the case where the photoelectric sensor is configured to be assembled to the air bag by being housed in the housing space provided in the air bag has been described as an example, the photoelectric sensor is housed in the housing space using another method. It is good.

  As another method, for example, it is conceivable that the photoelectric sensor is held at a predetermined portion of the air bag by being housed in the housing space without being mounted on the flexible wiring board. In that case, for example, the photoelectric sensor may be connected to an external circuit by a lead wire or the like. In addition, a conductive pattern is directly provided on the bag-like member and / or the sheet-like member constituting the air bag, The photoelectric sensor may be connected to an external circuit by connecting the photoelectric sensor to these conductive patterns.

  Further, in the above-described embodiment of the present invention and its modification, as a blood pressure information measuring device, a pulse wave meter that acquires a volume pulse wave, or a volume vibration system that acquires a systolic blood pressure value and a diastolic blood pressure value. Although the present invention has been described by exemplifying the case where the present invention is applied to the sphygmomanometer, the present invention also obtains an index indicating the degree of arteriosclerosis represented by an AI value, pulse, oxygen saturation, etc. Any device that can acquire blood pressure information by an optical method, such as a blood pressure information measuring device configured to be capable of performing blood pressure measurement or a blood pressure monitor that acquires a blood pressure value based on a volume compensation method Its application is possible.

  Further, in the above-described embodiment of the present invention and its modifications, the case where the wrist is adopted as the measurement site has been described as an example, but blood pressure information that employs another part of the body as the measurement site The present invention can also be applied to a measuring device. Other parts of the body that can be employed as the part to be measured mainly include other parts of the extremities such as the upper arm, ankle, and thigh, the neck, fingers, and the like.

  Furthermore, the characteristic configurations shown in the above-described embodiment of the present invention and the modifications thereof can naturally be combined with each other.

  As described above, the above-described embodiments and modifications thereof disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms 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 apparatus, 10A to 10E, 10G cuff, 10F detection unit, 20A to 20I Air bag, 21 bag-like member, 22 compression space, 23 sheet-like member, 24 housing space, 25 joint, 25a partition Part, 26, 26a-26d opening part, 30 photoelectric sensor, 31 light emitting element, 32 light receiving element, 34 flexible wiring board, 35 wiring pattern, 40 clamping belt, 42 freely deformable member, 42a-42c parts, 42a1, 42b1 insertion hole 42c1 mounting part, 44 curler, 50 pressing block, 52 mounting table, 52a recess, 54 support frame, 111 light emitting element drive circuit, 112 received light amount detection circuit, 120 control part, 121 volume pulse wave acquisition part, 122 pressure detection part 123 blood pressure value acquisition unit, 130 memory unit, 140 display unit, 50 Operation section, 160 Power supply section, 171 Pressure pump, 172 Exhaust valve, 173 Pressure sensor, 174 Pressure pump drive circuit, 175 Exhaust valve drive circuit, 176 Oscillation circuit, 177 Actuator, 177a Drive shaft, 178 Encoder, 179 Actuator Drive circuit, 190 air tube, 200 wrist, 210 radius, 212 radial artery, 220 ulna, 222 ulnar artery, 230 tendon.

Claims (9)

A fluid bag having a compression space for compressing the measurement site;
Fixing means for fixing the fluid bag by pressing it toward the measurement site;
The light quantity of the detected light received by including the light emission part and the light receiving part, irradiating the detection light from the light emission part toward the measurement site and receiving the detection light transmitted through the measurement site by the light reception unit A blood pressure information measuring device detection unit comprising a photoelectric sensor that outputs an output signal according to
The fluid bag further includes an accommodation space formed by joining a sheet-like member to an inner surface or an outer surface of a member constituting the compression space,
A detection unit for a blood pressure information measuring device, wherein the photoelectric sensor is housed in the housing space and is held by being sandwiched between the member constituting the compression space and the sheet-like member.   The blood pressure information measurement device detection unit according to claim 1, wherein the housing space is not in communication with the compression space.   The detection unit for a blood pressure information measurement device according to claim 1 or 2, wherein the sheet-like member is joined to a member constituting the compression space by welding.   The detection unit for blood pressure information measurement device according to any one of claims 1 to 3, wherein the photoelectric sensor is further bonded to at least one of the member and the sheet-like member constituting the compression space.   The detection unit for a blood pressure information measuring device according to any one of claims 1 to 4, wherein a signal line connected to the photoelectric sensor is drawn out of the fluid bag without passing through the compression space.   The detection unit for a blood pressure information measurement device according to any one of claims 1 to 5, wherein the sheet-like member is lower in elasticity than the member constituting the compression space. A plurality of the accommodating spaces are provided,
The blood pressure information measurement device detection unit according to any one of claims 1 to 6, wherein the light emitting unit and the light receiving unit are individually accommodated in the plurality of accommodation spaces. The detection unit for blood pressure information measurement device according to any one of claims 1 to 7,
A pressure increasing / decreasing mechanism for increasing / decreasing the pressure space;
A driving unit for causing the light emitting unit to emit light;
A received light amount detector for detecting fluctuations in the received light amount based on an output signal output from the photoelectric sensor;
A blood pressure information measurement device comprising: a volume pulse wave acquisition unit that acquires a volume pulse wave based on information obtained by the received light amount detection unit. A pressure detector for detecting the pressure of the compression space;
A blood pressure value acquisition unit for acquiring a diastolic blood pressure value and a systolic blood pressure value based on the information on the volume pulse wave obtained by the volume pulse wave acquisition unit and the pressure information obtained by the pressure detection unit; The blood pressure information measuring device according to claim 8 provided.

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