JP2006102191A - Blood pressure measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood pressure measuring device capable of properly detecting the pulsation of a blood vessel in the peripheral site of a subject and precisely measuring the blood pressure. <P>SOLUTION: The blood pressure measuring device can properly detect the pulsation waveform of the pulsation of the blood vessel in the peripheral site of the subject pressurized by a cuff based on a signal output by a pressure sensor of a signal output by a photoelectric element by arranging a pulsation waveform detecting section and an amplitude intensity calculating section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a blood pressure measurement apparatus using a cuff that compresses a part of a subject.

  With the aging of society, dealing with adult lifestyle-related diseases has become a major social issue. It is recognized that long-term blood pressure data collection is very important, especially for diseases related to high blood pressure. From such a viewpoint, a small-sized measuring apparatus that can be attached to the peripheral part of a subject and can easily and constantly measure various biological information including blood pressure has been developed (see, for example, Patent Document 1).

  In addition, as a method of measuring blood pressure by attaching to the peripheral part of the subject, the scattered light that is irradiated light irradiated to the subject by the light emitting element provided in the apparatus is scattered by the blood vessels of the subject or blood cells in the blood vessels, A method for detecting pulsation from scattered light received by a light receiving element provided in the apparatus has been developed (for example, see Patent Document 2). This can be calculated from the received light amount of scattered light of infrared light and visible light radiated into the living body such as pulse, electrocardiogram, body temperature, arterial oxygen saturation, and blood pressure. A blood pressure measurement device that measures the pulsation waveform of a blood vessel by light is a powerful blood pressure measurement method along with other blood pressure measurement devices (for example, see Non-Patent Document 1) using a cuff vibration method or a volume compensation method. Is recognized as.

In this application, the name of the auricle is based on Non-Patent Document 2, the name of the cartilage of the auricle is based on Non-Patent Document 3, and the name of the outer ear is based on Non-Patent Document 4.
JP-A-11-128174 JP-A-9-128203 Kenichi Yamakoshi, Tatsuo Togawa, “Biosensor and Measuring Device”, MM Japan Society / ME textbook series A-1, pages 39-52 Sobotta Illustrated Human Anatomy Volume 1 (Translation by Michio Okamoto), p. 126, Medical School, issued October 1, 1996 Sobotta Illustrated Human Anatomy Volume 1 (Translation by Michio Okamoto), p. 127, Medical School, issued October 1, 1996 Supervised and commented by Nagao Takahashi “Body of Physical Maps”, p. 20, Kodansha, published on January 29, 2004

  In blood pressure measurement using a small blood pressure measurement device attached to the peripheral part of the subject as described above, it is necessary to accurately detect pulsation from the blood vessels in the peripheral part of the subject. However, in a small blood pressure measurement device attached to the peripheral part of a conventional subject, it is unknown whether or not pulsation is accurately detected, and blood pressure measurement is performed even when pulsation is not accurately detected. As a result, there has been a problem of increasing the error in blood pressure measurement.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a blood pressure measurement device that can accurately detect blood vessel pulsations in the peripheral part of a subject and can accurately measure blood pressure.

In order to achieve the above object, the blood pressure measurement device according to the first invention of the present application includes a pulsation waveform detection unit and an amplitude intensity calculation unit, thereby detecting a pulsation of a blood vessel in a peripheral portion of a subject compressed by a cuff. It is possible to accurately detect the pulsation waveform from the signal output by.
Specifically, the first invention of the present application includes a cuff that compresses a subject, a pressure sensor that measures a pulsation of the subject that is compressed by the cuff as a pressure change in the cuff, and an output of the pressure sensor. A blood pressure measurement apparatus comprising: a pulsation waveform detection unit that detects a pulsation waveform from a signal; and an amplitude intensity calculation unit that calculates the amplitude intensity of the pulsation waveform output from the pulsation waveform detection unit.

  In the blood pressure measurement device according to the first invention of the present application, the pulsation waveform detection unit detects a pulsation waveform that is a pulsation component from the pressure change signal in the cuff output by the pressure sensor, and the amplitude intensity calculation unit Since the amplitude intensity of the pulsation waveform is calculated, the pulsation of the blood vessel in the peripheral part of the subject can be accurately detected. Therefore, the blood pressure measurement device according to the first invention of the present application can accurately measure the blood pressure from the change in the amplitude intensity of the pulsation waveform in the blood pressure measurement process.

  In order to achieve the above object, the blood pressure measurement device according to the first aspect of the present invention may further include an amplitude intensity display unit that displays the amplitude intensity calculated by the amplitude intensity calculation unit. The amplitude intensity display unit may display the amplitude intensity as a discrete value or a continuous value.

  The blood pressure measurement device according to the first invention of the present application can display the amplitude intensity calculated by the amplitude intensity calculation unit as visual information by including the amplitude intensity display unit. As a visual information display method, the amplitude intensity may be a discrete value, that is, a digital display, or a continuous value such as an analog meter or a graph. The user can observe the amplitude intensity of the pulsation waveform by the visual information at the time of blood pressure measurement, and can confirm whether or not the cuff is pressing the blood vessel inside the subject accurately. When the cuff does not press the blood vessel inside the subject accurately and the amplitude intensity is small and the blood pressure cannot be measured sufficiently, the user can place the blood pressure measuring device at the position of the subject so as to increase the amplitude intensity. Can be remounted. Therefore, the blood pressure measuring device according to the first invention of the present application can accurately measure the blood pressure.

  In order to achieve the above object, the blood pressure measurement device according to the first aspect of the present invention may further include an amplitude intensity notification unit that notifies the amplitude intensity calculated by the amplitude intensity calculation unit with sound.

  The blood pressure measurement device according to the first aspect of the present application includes the amplitude intensity notification unit, so that the amplitude intensity calculated by the amplitude intensity calculation unit can be notified by auditory information. By notifying the user of the amplitude intensity with auditory information, the user can know the amplitude intensity even when the blood pressure measuring device according to the first aspect of the present invention is mounted on a measurement unit that cannot be visually confirmed by the user. it can. The user can confirm whether or not the cuff is accurately pressing the blood vessel inside the subject by listening to the auditory information during blood pressure measurement. When the cuff does not press the blood vessel inside the subject accurately and the amplitude intensity is small and the blood pressure cannot be measured sufficiently, the user can place the blood pressure measuring device at the position of the subject so as to increase the amplitude intensity. Can be remounted. Therefore, the blood pressure measuring device according to the first invention of the present application can accurately measure the blood pressure.

  In order to achieve the above object, the blood pressure measurement device according to the first aspect of the present invention may further include an amplitude comparison unit that compares the amplitude intensity calculated by the amplitude intensity calculation unit with a preset threshold value.

  In the blood pressure measurement device according to the first invention of the present application, a threshold value necessary for accurate blood pressure measurement is set in advance in the amplitude comparison unit, and the amplitude intensity calculated by the amplitude intensity calculation unit during blood pressure measurement and Compared with the threshold value, the measurement result when the amplitude intensity that changes during blood pressure measurement reaches the threshold value is the accurate blood pressure measured by the cuff pressing the blood vessel inside the subject accurately. Blood pressure can be measured.

  In order to achieve the above object, the blood pressure measurement device according to the first invention of the present application may further include an amplitude comparison display unit for displaying a result of comparison by the amplitude comparison unit.

  The blood pressure measurement device according to the first aspect of the present application includes the amplitude comparison display unit, so that the comparison result between the amplitude intensity calculated by the amplitude intensity calculation unit and the threshold value can be displayed as visual information. By observing the visual information, the user confirms whether or not the cuff presses the blood vessel inside the subject accurately, and the amplitude intensity of the pulsation waveform is measured at an intensity higher than the level necessary for blood pressure measurement. be able to. When the amplitude intensity is less than or equal to the level necessary for blood pressure measurement, the user can reattach the blood pressure measurement device to the position of the subject where the amplitude intensity is greater than or equal to the level necessary for blood pressure measurement. Therefore, the blood pressure measuring device according to the first invention of the present application can accurately measure the blood pressure.

  In order to achieve the above object, the blood pressure measurement device according to the first invention of the present application may further include an amplitude comparison notification unit that notifies the result of comparison by the amplitude comparison unit by sound.

  The blood pressure measurement device according to the first aspect of the present application includes the amplitude comparison notification unit, so that the comparison result between the amplitude intensity calculated by the amplitude intensity calculation unit and the threshold value can be notified by auditory information. By notifying the user of the result with auditory information, the user can know the result even when the blood pressure measurement device according to the first aspect of the present invention is attached to a measurement unit that cannot be visually confirmed directly. The user confirms whether or not the cuff presses the blood vessel inside the subject accurately by listening to the auditory information and the amplitude intensity of the pulsating waveform is measured at a level higher than the level necessary for blood pressure measurement. Can do. When the amplitude intensity is less than or equal to the level necessary for blood pressure measurement, the user can reattach the blood pressure measurement device to the position of the subject where the amplitude intensity is greater than or equal to the level necessary for blood pressure measurement. Therefore, the blood pressure measuring device according to the first invention of the present application can accurately measure the blood pressure.

  The blood pressure measurement device according to the first invention of the present application may further include a contact detection unit that detects that the cuff contacts the subject and operates at least the pulsation waveform detection unit and the amplitude intensity calculation unit. Good.

  The blood pressure measurement device according to the first invention of the present application detects that the cuff is in contact with the subject, and operates at least the pulsation waveform detection unit and the amplitude intensity calculation unit so that the cuff is attached to the subject. Since it operates after contact, malfunction can be prevented.

  In order to achieve the above object, the second invention of the present application provides a blood pressure measurement device that can accurately detect the pulsation of blood vessels in the peripheral part of the subject compressed by the cuff as the intensity change of the scattered light emitted to the subject. provide.

  Specifically, the second invention of the present application includes a cuff that compresses the subject, a light emitting element that irradiates light from within the cuff to a part of the subject that the cuff contacts, and a part of the subject. A light receiving element that receives the scattered light scattered by the light in the cuff, a pulsation waveform detection unit that detects a pulsation waveform from a signal output from the light reception element, and an amplitude of the pulsation waveform output from the pulsation waveform detection unit A blood pressure measurement apparatus comprising: an amplitude intensity calculation unit that calculates intensity.

  In the blood pressure measurement device according to the second invention of the present application, a pulsation waveform in which the pulsation waveform detection unit is a pulsation component from a signal output from the light receiving element that receives the scattered light due to the pulsation of the subject by the pulsation waveform detection unit. Then, the amplitude intensity calculation unit calculates the amplitude intensity of the pulsation waveform, so that the pulsation of the blood vessel in the peripheral part of the subject can be accurately detected. Accordingly, blood pressure can be accurately measured from the change in the amplitude intensity of the pulsation waveform in the blood pressure measurement process.

  In order to achieve the above object, in the blood pressure measurement device according to the second invention of the present application, the light receiving element direction adjustment for adjusting the light receiving direction of the light receiving element so that the amplitude intensity output from the amplitude intensity calculating unit is maximized. A part may be further provided.

  The blood pressure measurement device according to the second invention of the present application is provided with the light receiving element direction adjusting unit to adjust the light receiving direction of the light receiving element so that the amplitude intensity output from the amplitude intensity calculating unit is maximized. A weak signal can be detected efficiently, and the difference in the accuracy of blood pressure measurement depending on the mounting location of the subject can be reduced. Therefore, the blood pressure measurement device according to the second invention of the present application can accurately measure blood pressure.

  In order to achieve the above object, in the blood pressure measurement device according to the second invention of the present application, the light emitting element direction adjustment for adjusting the irradiation direction of the light emitting element so that the amplitude intensity output from the amplitude intensity calculating unit is maximized. A part may be further provided.

  The blood pressure measurement device according to the second invention of the present application is provided with the light emitting element direction adjusting unit to adjust the irradiation direction of the light emitting element so that the amplitude intensity output from the amplitude intensity calculating unit is maximized. A weak signal can be detected efficiently, and the difference in the accuracy of blood pressure measurement depending on the mounting location of the subject can be reduced. Therefore, the blood pressure measurement device according to the second invention of the present application can accurately measure blood pressure.

  In order to achieve the above object, in the blood pressure measurement device according to the first invention of the present application and the second invention of the present application, the position of the cuff is adjusted so that the amplitude intensity output from the amplitude intensity calculator is maximized. You may further provide a position adjustment part.

  The blood pressure measurement device according to the first invention of the present application and the second invention of the present application can efficiently detect a weak signal by providing the position adjustment unit, and reduce the difference in the accuracy of blood pressure measurement depending on the mounting location of the subject. can do. Therefore, the blood pressure measurement device according to the second invention of the present application can accurately measure blood pressure.

  In order to achieve the above object, in the blood pressure measurement device according to the first invention of the present application and the second invention of the present application, after the position adjustment of the cuff is completed by the position adjustment unit, the inside of the cuff that presses the subject There may be further provided a pressure adjusting unit for adjusting the pressure in the cuff so that the pressure of the gas matches the atmospheric pressure.

  The blood pressure measurement device according to the first invention of the present application and the second invention of the present application includes the pressure adjusting unit, so that the pressure in the cuff that compresses the subject matches the atmospheric pressure. With the adjusted state as the initial value, and the pressure change from the initial value as the pressure that presses the subject with the cuff, the measurement error factor due to the pressure applied to the subject surface can be removed. Can measure blood pressure with high accuracy.

  In order to achieve the above object, in the blood pressure measurement device according to the first invention of the present application and the second invention of the present application, the position of the cuff by the contact pressure sensor for measuring the pressure in contact with the subject and the position adjusting unit A pressure adjustment unit that adjusts the pressure in the cuff so that the pressure at which the cuff and the subject come into contact with each other after the adjustment is completed may be further provided.

  The blood pressure measurement device according to the first invention of the present application and the second invention of the present application includes the pressure adjusting unit, thereby reducing the pressure in the cuff so that the pressure at which the cuff contacts the subject becomes zero. With the adjusted state as an initial value, by making the pressure change from the initial value a pressure that compresses the subject by the cuff, it is possible to remove the measurement error factor due to the applied pressure on the subject surface, Blood pressure can be measured with high accuracy.

  In the blood pressure measurement device according to the first invention of the present application and the second invention of the present application, the outer ear and / or the periphery of the outer ear may be the measurement site of the subject. By mounting the blood pressure measuring device according to the first invention of the present application and the second invention of the present application around the outer ear and / or around the outer ear, blood pressure can be easily and constantly measured.

  In the blood pressure measurement device according to the first invention of the present application and the second invention of the present application, the auricle and / or the periphery of the auricle may be the measurement site of the subject. By mounting the blood pressure measuring device according to the first invention of the present application and the second invention of the present application around the auricle and / or around the auricle, blood pressure can be easily and constantly measured.

  In the blood pressure measurement device according to the first invention of the present application and the second invention of the present application, the tragus and / or the periphery thereof may be the measurement site of the subject. By mounting the blood pressure measuring device according to the first invention of the present application and the second invention of the present application on the tragus and / or its periphery, blood pressure can be easily and constantly measured.

  In the blood pressure measurement device according to the first invention of the present application and the second invention of the present application, the ear canal may be the measurement site of the subject. By mounting the blood pressure measuring device according to the first invention of the present application and the second invention of the present application on the ear canal, blood pressure can be easily and constantly measured.

  The blood pressure measurement device according to the present invention includes the pulsation waveform detection unit and the amplitude intensity calculation unit, so that blood vessel pulsation in the peripheral part of the subject can be accurately detected. Blood pressure can be accurately measured from the change in amplitude intensity of the waveform.

Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below is an example of the configuration of the present invention, and the present invention is not limited to the following embodiment.
(Embodiment 1)

FIG. 1 is a schematic view showing an embodiment of a blood pressure measurement device according to the first embodiment of the present invention.
The blood pressure measurement device 101 includes a housing 92, a cuff 93, an air pipe 94, a pressure sensor 11, a pulsation waveform detection unit 12, an amplitude intensity calculation unit 13, and an amplitude intensity display unit 14.

  The cuff 93 is connected to the air pipe 94 and is disposed between the housing 92 and the subject so that a part thereof is in contact with the subject. The cuff 93 is expanded by air sent from an air pump (not shown) through the air pipe 94 and compresses the subject using a reaction with the housing 92. The air pump can gradually discharge air through the air pipe 94 from the expanded cuff 93 during blood pressure measurement, and the cuff 93 contracts by discharging the air, and the pressure for compressing the subject is constant. Decrease at a rate of.

  The material of the casing 92 is not particularly specified, but plastic such as plastic that does not deform with the pressure of the cuff 93 or metal such as aluminum or stainless steel is desirable.

  Although the material of the cuff 93 is not particularly limited, it is desirable that the cuff 93 is vinyl or rubber that does not leak air and is stretchable and durable.

  The pressure sensor 11 is disposed between the air pipe 94 and the air pump, and measures the air pressure in the cuff 93. The measured pressure is output as a signal A such as a voltage or current having a magnitude corresponding to the pressure. In order to accurately measure the air pressure in the cuff 93, it is desirable that the cuff 93 be disposed in the vicinity of the cuff 93 that is less susceptible to vibration of the air pipe 94. The pressure sensor 11 is a bellows type that utilizes the expansion and contraction of the bellows due to a change in atmospheric pressure, a semiconductor type that utilizes the resistance value due to the piezo effect of the piezoresistor, and the frequency of the single crystal silicon vibrator changes. It is possible to use a silicon-type pressure gauge utilizing the above.

  The pressure measured by the pressure sensor 11 includes not only the pressure with which the cuff 93 compresses the subject but also the pulsation generated from the blood vessel of the subject that has been compressed. Therefore, the signal A includes the pulsation component of the pulsation. . The pulsation waveform detector 12 detects the pulsation component from the received signal A and outputs a pulsation waveform B. Since the pulsating component is the pulse cycle of the subject, it is a signal of about 50 to 200 per minute, that is, about 3 to 12 kHz. For example, the pulsation waveform detector 12 may be a filter circuit that can extract a signal of 3 to 12 kHz from the signal A. The pulsation waveform detection unit 12 outputs a pulsation waveform B from which a signal of a change in pressure at which a low frequency cuff 93 not included in 3 to 12 kHz compresses the subject and a signal such as high frequency noise are removed from the signal A. Can do. Therefore, the blood pressure measurement device 101 can accurately detect the weak pulsation of the blood vessel in the peripheral part of the subject. Further, the pulsation waveform detection unit 12 may extract a pulse signal generated at a constant interval of the signal A as a pulsation due to a pulse, and obtain a pulsation waveform B.

  The amplitude intensity calculator 13 calculates the real time amplitude of the pulsation waveform B, and outputs it as an amplitude intensity signal C converted into, for example, a voltage value or a current value. The amplitude intensity of the pulsation waveform B included in the signal A changes in proportion to the intensity of the pulsation generated from the blood vessel in the subject. That is, if the pulsation is strong, the amplitude intensity signal C is large, and if the pulsation is small, the amplitude intensity signal C is small.

  The amplitude intensity display unit 14 receives the amplitude intensity signal C and displays the amplitude intensity as visual information. As a display method, the amplitude intensity signal C may be displayed as a discrete value, that is, a digital value, or may be displayed as a continuous value such as an analog meter or a graph. Moreover, a character or a figure may be displayed on a display part and you may display by the change of the brightness | luminance or color of a light emitting element. The amplitude intensity signal C is a real time amplitude value of the pulsation waveform B, and may be displayed as it is. However, the maximum value, the average value, or the minimum value of the amplitude value within a certain time so as to be easily confirmed by the user. May be displayed. The user can observe the amplitude intensity signal C of the pulsation waveform B with visual information at the time of blood pressure measurement by the amplitude intensity display unit 14, and can confirm whether or not the cuff 93 is pressing the blood vessel inside the subject accurately. .

  The contact detection unit 82 notifies the pulsation waveform detection unit 12 and the amplitude intensity calculation unit 13 that the subject and the cuff 93 are in contact with each other. The pulsation waveform detection unit 12 and the amplitude intensity calculation unit 13 can avoid malfunction by receiving a signal that contacts the subject output from the contact detection unit 82 and starting the operation. The contact detection unit 82 may be a thermometer that detects body temperature. When the cuff 93 comes into contact with the subject, the body temperature of the subject is transmitted and the temperature rises. It can be said that the subject has been in contact with the increase in temperature. The contact detection unit 82 may be an electrical resistance measuring instrument having an electrode that contacts the subject. When not in contact with the subject, the resistance value of the air is high and the resistance is high. However, when the contact is made with the subject, the resistance value of the subject is obtained and the resistance value decreases. It can be said that the contact with the subject is caused by the decrease in the resistance value.

  The blood pressure measuring device 101 operates as follows. The blood pressure measurement device 101 is mounted so that the cuff 93 is in contact with the measurement portion of the subject. The contact detector 82 detects that the cuff 93 is in contact with the subject, and activates the pulsation waveform detector 12 and the amplitude intensity calculator 13. The cuff 93 is supplied with air through the air pipe 94, swells, and compresses the portion to be measured of the subject. The air pipe 94 continues to supply air until the signal A output from the pressure sensor 11 reaches a pressure at which the blood flow inside the subject stops. Thereafter, the air pipe 94 gradually exhausts the air inside the cuff 93 to reduce the pressure for compressing the portion to be measured of the subject. As the pressure for compressing the portion to be measured of the subject decreases, blood flow inside the subject begins to flow, and pulsation due to blood flow resistance due to the compression begins. The pulsation fluctuates the pressure in the cuff 93, and the signal A output from the pressure sensor 11 includes a component due to the pulsation. The pulsation waveform detector 12 that has received the signal A detects the pulsation waveform B from the signal A, and the amplitude intensity calculator 13 that has received the pulsation waveform B calculates the amplitude intensity and outputs an amplitude intensity signal C. The amplitude intensity display unit 14 that has received the amplitude intensity signal C displays the amplitude intensity.

  When the cuff 93 does not press the blood vessel inside the subject accurately and the amplitude intensity signal C is small and the blood pressure cannot be measured sufficiently, the user can place the subject at a position where the amplitude intensity signal C is increased. The blood pressure measuring device 101 can be remounted and blood pressure can be measured again. For example, the pressure value of the pressure sensor 11 when the pulsation waveform detector 12 starts to detect the pulsation waveform B can be set to the maximum blood pressure. Further, the pulse of the subject can be measured from the period of the pulsation waveform B. If the air inside the cuff 93 is further exhausted and the pressure for compressing the subject further decreases, the resistance to blood flow due to the compression disappears, and the pulsation of the blood vessel becomes weak. For example, the pressure value of the pressure sensor 11 when the pulsation waveform detection unit 12 cannot detect the pulsation waveform B can be set to the minimum blood pressure. As described above, the blood pressure measurement device 101 can accurately measure the blood pressure and pulse of the subject.

  Further, the blood pressure measurement device 101 may include a frame 90 that fixes the positions of the blood pressure measurement device 101 and the subject and a position adjustment unit 95 that is disposed between the frame 90 and the housing 92. The position adjustment unit 95 moves the casing 92 to two orthogonal axes (X axis and Y axis) in a direction parallel to the subject surface with which the cuff 93 is in contact by an actuator such as a motor or a linear motor. Can be moved. After mounting the blood pressure measurement device 101 on the subject, the position adjustment unit 95 can adjust the position of the cuff 93 so that the amplitude intensity signal C is maximized. When the blood pressure measurement device 101 is attached to the peripheral part of the subject, the position adjustment unit 95 can adjust the amplitude intensity signal C to be maximized with higher accuracy than when the user finely adjusts the position of the blood pressure measurement device 101. . Therefore, after the blood pressure measuring apparatus 101 is attached to the subject, the blood pressure can be accurately measured by adjusting the position of the cuff 93 so that the amplitude intensity signal C is maximized. The frame 90 and the position adjustment unit 95 can be provided in any of Embodiments 2 to 12 described below, and have the same functions and operations as the functions and operations described in FIG.

  Furthermore, the blood pressure measurement device 101 may include a pressure adjustment unit 96 in the housing 92. For example, the pressure adjusting unit 96 may include a vent hole between the cuff 93 and the outside, and a valve that opens and closes the vent hole. After the blood pressure measurement device 101 is mounted on the subject and the position adjustment unit 95 adjusts the position of the cuff 93, the pressure adjustment unit 96 opens the vent hole between the cuff 93 and the outside, for example, in the cuff 93. The pressure can be adjusted to a pressure equal to atmospheric pressure. The blood pressure measurement device 101 measures the blood pressure using the value measured by the pressure sensor 11 for the pressure in the cuff 93 when the pressure adjusting unit 96 opens the vent hole, and the blood pressure measurement device 101 measures the surface of the subject. Measurement error factors due to the applied pressure can be removed, and blood pressure can be measured with high accuracy.

  Furthermore, a contact pressure sensor 81 that measures the pressure with which the cuff 93 presses the subject may be provided at the contact portion of the cuff 93 with the subject. As the contact pressure sensor 81, a pressure sensitive sensor such as a pressure sensitive conductive rubber or a piezoelectric element can be used. After the blood pressure measurement device 101 is attached to the subject and the position adjustment unit 95 adjusts the position of the cuff 93, the pressure adjustment unit 96 has a measurement result of the contact pressure sensor 81 that is zero, that is, the pressure to press the subject is zero. The pressure in the cuff 93 may be adjusted so that By measuring the blood pressure using the value measured by the pressure sensor 11 for the pressure in the cuff 93 when the measurement result of the contact pressure sensor 81 is zero, the blood pressure measurement device 101 can measure the blood pressure. Measurement error factors due to the pressure applied to the surface can be removed, and blood pressure can be measured with high accuracy.

The pressure adjusting unit 96 and the contact pressure sensor 81 can be provided in any of the second to twelfth embodiments described below, and have the same functions and operations as the functions and operations described in FIG.
(Embodiment 2)

  FIG. 2 is a schematic view showing an embodiment of a blood pressure measurement device according to another embodiment of the first invention of the present application. In the blood pressure measurement device 102 in FIG. 2, the same symbols as those used in the blood pressure measurement device 101 perform the same functions and operations. The difference between the blood pressure measurement apparatus 102 and the blood pressure measurement apparatus 101 is that the amplitude intensity display section 14 is not provided, but the amplitude intensity notification section 24 that notifies the amplitude intensity signal C by sound.

  The amplitude intensity notification unit 24 receives the amplitude intensity signal C and notifies the amplitude intensity as auditory information. As a notification method, the amplitude intensity signal C can be notified by a change in sound intensity, tone color or pitch by a speaker. Further, the value of the intensity signal may be notified by speaking in words. By notifying the user of the amplitude intensity signal C with auditory information, the user can know the amplitude intensity signal C even when the blood pressure measuring device 102 is attached to a measurement unit that cannot be visually confirmed by the user. The user can confirm whether the cuff 93 is accurately pressing the blood vessel inside the subject by listening to the auditory information during blood pressure measurement.

  The blood pressure measurement device 102 operates as follows. The blood pressure measurement device 102 performs the same operation as the blood pressure measurement device 101 described with reference to FIG. 1 until the amplitude intensity calculation unit 13 calculates the amplitude intensity signal C. The amplitude intensity notification unit 24 that has received the amplitude intensity signal C generates a sound corresponding to the amplitude intensity. When the cuff 93 does not press the blood vessel inside the subject accurately and the amplitude intensity signal C is small and the blood pressure cannot be measured sufficiently, the user can place the subject at a position where the amplitude intensity signal C is increased. The blood pressure measurement device 102 can be remounted and blood pressure can be measured again.

Therefore, the blood pressure measurement device 102 can accurately measure the blood pressure.
(Embodiment 3)

  FIG. 3 is a schematic view showing an embodiment of a blood pressure measurement device according to another embodiment of the first invention of the present application. In the blood pressure measurement device 103 in FIG. 3, the same reference numerals as those used in the blood pressure measurement device 101 perform the same functions and the same operations. The difference between the blood pressure measurement device 103 and the blood pressure measurement device 101 is that the amplitude intensity display unit 14 is not provided, but the amplitude comparison unit 30 that compares the amplitude intensity signal C with a preset threshold value is provided.

  As described in the operation of the blood pressure measurement device 101, the blood pressure measurement device 103 performs blood pressure measurement by extracting the pulsation waveform B from the signal A output from the pressure sensor 11. However, depending on the location where the cuff 93 is compressed, the amplitude intensity signal C is small and accurate blood pressure measurement may not be possible. Therefore, a threshold value necessary for accurate blood pressure measurement is set in the amplitude comparison unit 30 in advance, and the amplitude intensity signal C calculated by the amplitude intensity calculation unit 13 at the time of blood pressure measurement is compared with the threshold value. It is possible to determine whether or not the cuff 93 accurately presses the blood vessel inside the subject. Since the amplitude intensity signal C changes depending on the pressure with which the cuff 93 presses the subject during blood pressure measurement, for example, the maximum value of the amplitude intensity signal C during blood pressure measurement may be compared with the threshold value.

  The blood pressure measurement device 103 may further include an amplitude comparison display unit 34 that displays a comparison result between the amplitude intensity signal C of the amplitude comparison unit 30 and the threshold value as visual information. The amplitude comparison unit 30 outputs the comparison result signal F to the amplitude comparison display unit 34. As a display method of the amplitude comparison display unit 34 that has received the signal F, for example, when the amplitude intensity signal C reaches the threshold value, the amplitude comparison display unit 34 displays that the threshold value has been exceeded by light emission of the light emitting element, or You may display by the change of a brightness | luminance or a color. Further, when the amplitude intensity signal C reaches the threshold value, the amplitude comparison display unit 34 may display that the threshold value has been exceeded with characters or figures. Conversely, when the amplitude intensity signal C does not reach the threshold, the amplitude comparison display unit 34 may display the display method.

  The blood pressure measurement device 103 operates as follows. The operation is the same as that of the blood pressure measurement device 101 until the amplitude intensity calculator 13 outputs the amplitude intensity signal C. As a result of the amplitude comparison unit 30 comparing the amplitude intensity signal C with the threshold value, if the amplitude intensity signal C reaches the threshold value, blood pressure measurement is performed assuming that the cuff 93 is accurately compressing the blood vessel inside the subject. . On the other hand, when the amplitude intensity signal C that changes during blood pressure measurement does not reach the threshold value, the cuff 93 does not accurately press the blood vessel inside the subject and does not measure blood pressure, and the amplitude comparison unit 30 displays the amplitude comparison. A signal F is output to the unit 34. The user can confirm whether or not the cuff 93 is accurately pressing the blood vessel inside the subject by observing the amplitude comparison display unit 34. When the cuff 93 does not press the blood vessel inside the subject accurately and the amplitude intensity signal C is smaller than the threshold, the user places the blood pressure measuring device 103 at the position of the subject so as to increase the amplitude intensity signal C. The blood pressure can be measured again after reattachment.

Therefore, the blood pressure measurement device 103 can accurately measure the blood pressure.
(Embodiment 4)

  FIG. 4 is a schematic diagram showing one embodiment of a blood pressure measurement device according to another embodiment of the first invention of the present application. In the blood pressure measurement device 104 of FIG. 4, the same reference numerals as those used in the blood pressure measurement device 103 perform the same functions and operations. A difference between the blood pressure measurement device 104 and the blood pressure measurement device 103 is that the amplitude comparison display unit 34 is not provided, but the amplitude comparison notification unit 44 that notifies the amplitude intensity signal C with auditory information is provided.

  The amplitude comparison unit 30 outputs the comparison result signal F to the amplitude comparison notification unit 44. As a notification method of the amplitude comparison / notification unit 44 that has received the signal F, for example, when the amplitude intensity signal C reaches the threshold, the amplitude comparison / notification unit 44 indicates that the threshold has been exceeded, the generation of sound by the speaker, or the sound Notification may be made by changing the strength, tone, or pitch. When the amplitude intensity signal C reaches the threshold value, the amplitude comparison notification unit 44 may notify the speaker that the threshold value has been exceeded by words. Conversely, when the amplitude intensity signal C does not reach the threshold, the amplitude comparison notification unit 44 may display the notification method. By notifying the user of the comparison result between the amplitude intensity signal C and the threshold value using auditory information, the user knows the comparison result even when the blood pressure measuring device 104 is attached to a measurement unit that cannot be directly visually confirmed by the user. be able to.

  The blood pressure measurement device 104 operates as follows. The blood pressure measurement device 104 performs the same operation as the blood pressure measurement device 101 described with reference to FIG. 1 until the amplitude comparison unit 30 compares the amplitude intensity signal C with the threshold value. As a result of the amplitude comparison unit 30 comparing the amplitude intensity signal C with the threshold value, if the amplitude intensity signal C reaches the threshold value, blood pressure measurement is performed assuming that the cuff 93 is accurately compressing the blood vessel inside the subject. . On the other hand, when the amplitude intensity signal C that changes during blood pressure measurement does not reach the threshold value, the cuff 93 does not accurately press the blood vessel inside the subject and does not measure the blood pressure, and the amplitude comparison unit 30 notifies the amplitude comparison. A signal F is output to the unit 44. The user can confirm whether or not the cuff 93 is pressing the blood vessel inside the subject accurately by listening to the auditory information of the amplitude comparison notification unit 44 during blood pressure measurement. When the cuff 93 does not press the blood vessel inside the subject accurately and the amplitude intensity signal C is smaller than the threshold, the user places the blood pressure measuring device 104 at the position of the subject so as to increase the amplitude intensity signal C. Can be remounted.

Therefore, the blood pressure measurement device 104 can accurately measure the blood pressure.
(Embodiment 5)

  FIG. 5 is a schematic view showing an embodiment of the blood pressure measurement device according to the second embodiment of the present invention. The blood pressure measurement device 105 includes a casing 92, a cuff 93, an air pipe 94, a pressure sensor 11, a pulsation waveform detection unit 12, an amplitude intensity calculation unit 13, an amplitude intensity display unit 14, a light emitting element 52, and a light receiving element 53. In the blood pressure measurement device 105 in FIG. 5, the same reference numerals as those used in the blood pressure measurement device 101 in FIG. 1 perform the same functions and operations. The light emitting element 52 and the light receiving element 53 are provided at a location where the cuff 93 in the cuff 93 contacts the housing 92.

  The light emitting element 52 irradiates the outside of the cuff 93 with irradiation light M for measuring the blood vessel pulsation of the subject. The cuff 93 of the blood pressure measuring device 105 needs to be a material that transmits light in order to irradiate the subject with the irradiation light M from the light emitting element 52, and is preferably transparent vinyl or transparent rubber.

  The scattered light N is generated by the irradiation light M being absorbed and scattered by the pulsation of blood vessels in the subject. More specifically, the irradiation light M is absorbed and scattered by the increase / decrease of blood in the measurement portion accompanying the pulsation of the blood vessel of the subject, that is, the increase / decrease of the amount of hemoglobin in the blood to become scattered light N. Light having a wavelength of 300 nm to 1500 nm can be used as the irradiation light M, and for example, a GaP (red) LED or a GaAs LED can be used as the light emitting element 52 that emits light with such a wavelength. In addition, light having a wavelength of 400 nm or more and 650 nm or less can be used, and a GaP-based (green) LED or a GaAsP-based LED can be used as the light emitting element 52 that emits light with such a wavelength.

  The light receiving element 53 is a photoelectric converter that outputs the received scattered light N as a signal G. The light receiving element 53 receives the scattered light N within the cuff 93. The type of the light receiving element 53 is determined by the type of the light emitting element 52 that emits the irradiation light M. When a GaP (red) LED or a GaAs LED is used for the light emitting element 52, it is preferable to use a Si phototransistor for the light receiving element 53. Further, when a GaP (green) LED or a GaAsP LED is used for the light emitting element 52, it is preferable to use a blue sensitive photodiode for the light receiving element 53. A signal G photoelectrically converted from the scattered light N is an electrical signal having a pulsating component of the blood vessel of the subject.

  The blood pressure measurement device 105 operates as follows. The blood pressure measurement device 105 is attached so that the cuff 93 is in contact with the measurement portion of the subject. Next, the cuff 93 is supplied with air through the air pipe 94, swells, and compresses the measurement target portion of the subject. The air pipe 94 continues to supply air until the pressure measured by the pressure sensor 11 reaches a pressure that stops the blood flow inside the subject. Thereafter, the light emitting element 52 irradiates the external subject with the irradiation light M, and the air pipe 94 gradually exhausts the air inside the cuff 93 to reduce the pressure for compressing the portion to be measured of the subject. . As the pressure for compressing the portion to be measured of the subject decreases, blood flow inside the subject begins to flow, and pulsation due to blood flow resistance due to the compression begins.

  The irradiation light M is scattered by the pulsation of the blood vessel inside the subject to become scattered light N, passes through the cuff 93, and is received by the light receiving element 53. The light receiving element 53 outputs a signal G corresponding to the intensity of the scattered light N. The pulsation waveform detector 12 that has received the signal G detects the pulsation waveform B from the signal G, and the amplitude intensity calculator 13 that has received the pulsation waveform B calculates the amplitude intensity and outputs an amplitude intensity signal C. The amplitude intensity display unit 14 that has received the amplitude intensity signal C displays the amplitude intensity. For example, the pressure value of the pressure sensor 11 when the pulsation waveform detector 12 starts to detect the pulsation waveform B can be set to the maximum blood pressure. Further, the pulse of the subject can be measured from the period of the pulsation waveform B. If the air inside the cuff 93 is further exhausted and the pressure for compressing the subject further decreases, the resistance to blood flow due to the compression disappears, and the pulsation of the blood vessel becomes weak. For example, the pressure value of the pressure sensor 11 when the pulsation waveform detection unit 12 cannot detect the pulsation waveform B can be set to the minimum blood pressure. Similarly to the blood pressure measurement device 101, the user can check the amplitude intensity display unit 14, reattach the blood pressure measurement device 105 to an optimal position, and measure blood pressure again.

Therefore, the blood pressure measurement device 105 can accurately measure the blood pressure and pulse of the subject.
(Embodiment 6)

  FIG. 6 is a schematic view showing an embodiment of a blood pressure measurement device according to another embodiment of the second invention of the present application. In the blood pressure measurement device 106 in FIG. 6, the same reference numerals as those used in the blood pressure measurement device 101 in FIG. 1, the blood pressure measurement device 102 in FIG. 2, and the blood pressure measurement device 105 in FIG. The difference between the blood pressure measurement device 106 and the blood pressure measurement device 105 of FIG. 5 is that the amplitude intensity display unit 14 is not provided, but the amplitude intensity notification unit 24 is provided.

  The blood pressure measurement device 106 operates in the same manner as the blood pressure measurement device 105. Therefore, the user of the blood pressure measurement device 106 can re-mount the blood pressure measurement device 106 at the optimum position based on the information of the amplitude intensity notification unit 24 and measure the blood pressure again.

Therefore, the blood pressure measurement device 106 can accurately measure the blood pressure and pulse of the subject.
(Embodiment 7)

  FIG. 7 is a schematic view showing an embodiment of a blood pressure measurement device according to another embodiment of the second invention of the present application. In the blood pressure measurement device 107 of FIG. 7, the same reference numerals as those used in the blood pressure measurement device 101 of FIG. 1 and the blood pressure measurement device 105 of FIG. The difference between the blood pressure measurement device 107 and the blood pressure measurement device 105 of FIG. 5 is that a contact detection unit 82 is further provided.

  The blood pressure measurement device 107 operates in the same manner as the blood pressure measurement device 105. The blood pressure measuring device 107 further includes a contact detection unit 82, thereby avoiding malfunction and accurately measuring the blood pressure and pulse of the subject.

In the blood pressure measurement device 107, the same effect can be obtained even if the amplitude intensity display unit 14 is not provided and the amplitude intensity notification unit 24 is provided.
(Embodiment 8)

  FIG. 8 is a schematic diagram showing one embodiment of a blood pressure measurement device according to another embodiment of the second invention of the present application. In the blood pressure measurement device 108 in FIG. 8, the same reference numerals as those used in the blood pressure measurement device 107 in FIG. 7 perform the same functions and operations. The difference between the blood pressure measurement device 108 and the blood pressure measurement device 107 of FIG. 7 is that a direction adjustment control unit 51 and a light receiving element direction adjustment unit 55 are further provided.

  The direction adjustment control unit 51 receives the amplitude intensity signal C output from the amplitude intensity calculation unit 13 and outputs a control signal to the light receiving element direction adjustment unit 55. The light receiving element direction adjustment unit 55 is an actuator that adjusts the light receiving direction of the light receiving element 53, and is provided between the light receiving element 53 and the housing 92. The direction adjustment control unit 51 causes the light receiving element direction adjusting unit 55 to vibrate independently and finely in two axial directions in the plane direction including the light emitting element 52 and the light receiving element 53, and the amplitude intensity signal C is maximized. In this way, the light receiving direction of the light receiving element 53 may be automatically adjusted.

  In this method, the direction adjustment control unit 51 moves the light receiving direction of the light receiving element 53 set so that the light receiving element direction adjusting unit 55 can receive the scattered light N by a minute amount, and determines whether or not the amplitude intensity signal C increases. judge. If it becomes larger, it is moved in the same direction as the direction in which the fine amount is changed. Return to the original direction when it gets smaller. Therefore, the light receiving direction of the light receiving element 53 is finely oscillated by the light receiving element direction adjusting unit 55 and the light receiving direction is adjusted by the intensity of the amplitude intensity signal C, thereby maintaining the amplitude intensity signal C to be maximized. it can. In addition to the adjustment of the light receiving direction, the present invention can be applied to the position adjustment of the light receiving element 53.

  After the blood pressure measuring device 108 is attached to the subject, the light receiving element direction adjusting unit 55 adjusts the light receiving direction of the light receiving element 53 so that the amplitude intensity signal C is maximized, and measures blood pressure in the same manner as the blood pressure measuring device 105. The light receiving element direction adjustment unit 55 may always optimize the light receiving direction of the light receiving element 53 or may optimize it only when necessary.

  Therefore, the blood pressure measuring device 108 can efficiently detect the blood vessel pulsation of the subject and can accurately measure the blood pressure.

In the blood pressure measurement device 108, the same effect can be obtained even if the amplitude intensity display unit 14 is not provided and the amplitude intensity notification unit 24 is provided.
(Embodiment 9)

  FIG. 9 is a schematic diagram showing one embodiment of a blood pressure measurement device according to another embodiment of the second invention of the present application. In the blood pressure measurement device 109 in FIG. 9, the same reference numerals as those used in the blood pressure measurement device 108 in FIG. 8 perform the same functions and operations. The difference between the blood pressure measurement device 109 and the blood pressure measurement device 108 of FIG. 8 is that a light emitting element direction adjustment unit 54 is further provided.

  The light emitting element direction adjusting unit 54 is an actuator that adjusts the light emitting direction of the light emitting element 52, and is provided between the light emitting element 52 and the housing 92. The direction adjustment control unit 51 receives the amplitude intensity signal C output from the amplitude intensity calculation unit 13 and outputs a control signal to the light emitting element direction adjustment unit 54. Similar to the operation of the light receiving element direction adjusting unit 55, the direction adjustment control unit 51 controls the light emitting element 52 so that the amplitude intensity signal C of the pulsation waveform B detected by the light receiving element 53 is maximized by the light emitting element direction adjusting unit 54. Adjust the flash direction.

  After the blood pressure measuring device 109 is attached to the subject, the light receiving element direction adjusting unit 55 adjusts the light receiving direction of the light receiving element 53, and the light emitting element direction adjusting unit 54 maximizes the light emission direction of the light emitting element 52 by the amplitude intensity signal C. The blood pressure is measured in the same manner as the blood pressure measurement device 105. Further, the light emitting element direction adjusting unit 54 may optimize the direction of the light emitting element 52 at all times or only when necessary.

  Therefore, the blood pressure measurement device 109 can efficiently detect the blood vessel pulsation of the subject and can accurately measure the blood pressure.

In the blood pressure measurement device 109, the same effect can be obtained even if the amplitude intensity display unit 14 is not provided and the amplitude intensity notification unit 24 is provided.
(Embodiment 10)

  FIG. 10 is a schematic diagram showing an embodiment of a blood pressure measurement device according to another embodiment of the second invention of the present application. In the blood pressure measurement device 110 in FIG. 10, the same reference numerals as those used in the blood pressure measurement device 101 in FIG. 1 and the blood pressure measurement device 109 in FIG. 9 perform the same functions and operations. The difference between the blood pressure measurement device 110 and the blood pressure measurement device 109 in FIG. 9 is that the position of the blood pressure measurement device 110 and the subject is fixed, and a position adjustment unit 95 disposed between the frame 90 and the housing 92. It is to have.

  When the blood pressure measurement device 110 is attached to the peripheral part of the subject, the position adjustment unit 95 can adjust the amplitude intensity signal C to be maximized with higher accuracy than when the user finely adjusts the position of the blood pressure measurement device 110. .

  Therefore, the blood pressure measurement device 110 can accurately measure the blood pressure since the position adjustment unit 95 adjusts the position of the cuff 93 so as to maximize the amplitude intensity signal C after being attached to the subject.

In the blood pressure measurement device 110, the same effect can be obtained even if the amplitude intensity display unit 14 is not provided and the amplitude intensity notification unit 24 is provided.
(Embodiment 11)

  FIG. 11 is a schematic diagram showing an embodiment of a blood pressure measurement device according to another embodiment of the second invention of the present application. In the blood pressure measurement device 111 in FIG. 11, the same reference numerals as those used in the blood pressure measurement device 101 in FIG. 1 and the blood pressure measurement device 110 in FIG. 10 perform the same functions and operations. The difference between the blood pressure measurement device 111 and the blood pressure measurement device 110 of FIG. 10 is that a pressure adjustment unit 96 is further provided.

  The pressure adjustment unit 96 is provided in the housing 92. Since the blood pressure measuring device 111 includes the pressure adjusting unit 96, it is possible to remove a measurement error factor due to the pressure applied to the surface of the subject, and to measure blood pressure with high accuracy.

In the blood pressure measurement device 111, the same effect can be obtained even if the amplitude intensity display unit 14 is not provided and the amplitude intensity notification unit 24 is provided.
(Embodiment 12)

  FIG. 11 is a schematic diagram showing an embodiment of a blood pressure measurement device according to another embodiment of the second invention of the present application. In the blood pressure measurement device 112 in FIG. 12, the same reference numerals as those used in the blood pressure measurement device 101 in FIG. 1 and the blood pressure measurement device 111 in FIG. 11 perform the same functions and operations. The difference between the blood pressure measurement device 112 and the blood pressure measurement device 111 of FIG. 11 is that a contact pressure sensor 81 is further provided.

  The contact pressure sensor 81 is provided at the contact portion of the cuff 93 with the subject. Since the blood pressure measuring device 112 includes the pressure adjusting unit 96 and the contact pressure sensor 81, it is possible to remove a measurement error factor due to the pressure applied to the subject surface, and to measure blood pressure with high accuracy.

  In the blood pressure measurement device 112, the same effect can be obtained even if the amplitude intensity display unit 14 is not provided and the amplitude intensity notification unit 24 is provided.

  Furthermore, in the blood pressure measurement device 105 to the blood pressure measurement device 112 described with reference to FIGS. 5 to 12, the amplitude intensity display unit 14 is not provided, but the amplitude comparison unit 30 and the amplitude comparison display unit 34, or the amplitude comparison unit 30 and the amplitude comparison notification. A portion 44 may be provided. By checking the amplitude comparison display unit 34 or the amplitude comparison notification unit 44, the user does not press the blood vessel inside the subject accurately, and the amplitude intensity signal C is small and the blood pressure can be measured sufficiently. If not, the user can re-mount the blood pressure measuring device 112 from the blood pressure measuring device 105 to the position of the subject where the amplitude intensity signal C is increased, and perform blood pressure measurement again.

  The blood pressure measurement device 101 to the blood pressure measurement device 112 described with reference to FIGS. 1 to 12 are the periphery of a subject such as the outer ear and / or the outer ear periphery, the auricle and / or the auricle periphery, the tragus and / or the periphery thereof, and the outer ear canal. The blood pressure can be measured using the part as the measurement part of the subject. By attaching to the peripheral part of the subject, blood pressure can be easily and constantly measured.

  The blood pressure measurement device of the present invention can be applied to a health appliance that detects biological information for health maintenance and medical examination.

It is a figure which shows the structure of the blood-pressure measurement apparatus 101 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measuring apparatus 102 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measurement apparatus 103 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measurement apparatus 104 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measuring apparatus 105 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measurement apparatus 106 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measuring apparatus 107 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measurement apparatus 108 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measuring apparatus 109 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measuring apparatus 110 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measurement apparatus 111 of embodiment which concerns on this invention. It is a figure which shows the structure of the blood-pressure measurement apparatus 112 of embodiment which concerns on this invention.

Explanation of symbols

101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112 Blood pressure measurement device 11 Pressure sensor 12 Pulsation waveform detection unit 13 Amplitude intensity calculation unit 14 Amplitude intensity display unit 24 Amplitude intensity notification unit 30 Amplitude comparison unit 34 Amplitude comparison display unit 44 Amplitude comparison notification unit 51 Direction adjustment control unit 52 Light emitting element 53 Light receiving element 54 Light emitting element direction adjusting unit 55 Light receiving element direction adjusting unit 81 Contact pressure sensor 82 Contact detection unit 90 Frame 92 Case 93 Cuff 94 Air pipe 95 Position adjustment unit 96 Pressure adjustment unit A Signal B Pulsation waveform C Amplitude intensity signal F Signal G Signal M Irradiation light N Scattered light

Claims (18)

A cuff that compresses the subject,
A pressure sensor that measures the pulsation of the subject compressed by the cuff as a pressure change in the cuff;
A pulsation waveform detector for detecting a pulsation waveform from a signal output from the pressure sensor;
An amplitude intensity calculator for calculating the amplitude intensity of the pulsation waveform output by the pulsation waveform detector;
A blood pressure measurement device comprising:   The blood pressure measurement apparatus according to claim 1, further comprising an amplitude intensity display unit that displays the amplitude intensity calculated by the amplitude intensity calculation unit.   The blood pressure measurement device according to claim 1, further comprising an amplitude intensity notification unit that notifies the amplitude intensity calculated by the amplitude intensity calculation unit with sound.   The blood pressure measurement device according to claim 1, further comprising an amplitude comparison unit that compares the amplitude intensity calculated by the amplitude intensity calculation unit with a preset threshold value.   The blood pressure measurement apparatus according to claim 4, further comprising an amplitude comparison display unit that displays a comparison result of the amplitude comparison unit.   The blood pressure measurement device according to claim 4, further comprising an amplitude comparison notification unit that notifies a result of comparison by the amplitude comparison unit by sound.   The blood pressure measurement device according to claim 2, wherein the amplitude intensity display unit displays the amplitude intensity as a discrete value or a continuous value.   8. The apparatus according to claim 1, further comprising a contact detection unit that detects that the cuff has contacted the subject and operates at least the pulsation waveform detection unit and the amplitude intensity calculation unit. Blood pressure measuring device. A cuff that compresses the subject,
A light emitting element that emits light from within the cuff to a part of the subject that the cuff contacts; and
A light receiving element that receives the scattered light scattered by the light in a part of the subject in the cuff;
A pulsation waveform detector for detecting a pulsation waveform from a signal output from the light receiving element;
An amplitude intensity calculator for calculating the amplitude intensity of the pulsation waveform output by the pulsation waveform detector;
A blood pressure measurement device comprising:   The blood pressure measurement device according to claim 9, further comprising a light receiving element direction adjusting unit that adjusts a light receiving direction of the light receiving element so that the amplitude intensity output from the amplitude intensity calculating unit is maximized.   The blood pressure measurement device according to claim 9 or 10, further comprising a light emitting element direction adjusting unit that adjusts an irradiation direction of the light emitting element so that the amplitude intensity output from the amplitude intensity calculating unit is maximized. .   The blood pressure measurement device according to any one of claims 1 to 11, further comprising a position adjusting unit that adjusts the position of the cuff so that the amplitude intensity output from the amplitude intensity calculating unit is maximized.   A pressure adjusting unit that adjusts the pressure in the cuff so that the pressure in the cuff pressing the subject matches the atmospheric pressure after the position adjustment of the cuff is completed by the position adjusting unit; The blood pressure measurement device according to claim 12, wherein the device is a blood pressure measurement device. A contact pressure sensor for measuring a pressure that contacts the subject;
A pressure adjusting unit that adjusts the pressure in the cuff so that the pressure at which the cuff contacts the subject becomes zero after the position adjustment of the cuff by the position adjusting unit is completed. The blood pressure measurement device according to claim 12.   The blood pressure measurement device according to any one of claims 1 to 14, wherein the outer ear and / or the periphery of the outer ear is used as a measurement site of the subject.   The blood pressure measurement device according to any one of claims 1 to 14, wherein the auricle and / or the periphery of the auricle is used as a measurement site of the subject.   The blood pressure measuring device according to any one of claims 1 to 14, wherein the tragus and / or its periphery is used as a measurement site of the subject. 15. The blood pressure measurement device according to claim 1, wherein the ear canal is used as a measurement site of the subject.

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