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WO2016136865A1 - Dispositif de mesure de tension artérielle et procédé de commande d'affichage de tension artérielle - Google Patents

Dispositif de mesure de tension artérielle et procédé de commande d'affichage de tension artérielle Download PDF

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Publication number
WO2016136865A1
WO2016136865A1 PCT/JP2016/055587 JP2016055587W WO2016136865A1 WO 2016136865 A1 WO2016136865 A1 WO 2016136865A1 JP 2016055587 W JP2016055587 W JP 2016055587W WO 2016136865 A1 WO2016136865 A1 WO 2016136865A1
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Prior art keywords
blood pressure
unit
pressure
value
measurement device
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PCT/JP2016/055587
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English (en)
Japanese (ja)
Inventor
北川　毅
新吾 山下
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Omron Healthcare Co Ltd
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Omron Healthcare Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers

Definitions

  • the present invention relates to a blood pressure measurement device and a blood pressure display control method.
  • the blood pressure measurement device described in Patent Literature 1 calculates a blood pressure value using a cuff at a part different from a living body part with which the pressure sensor is brought into contact, and generates calibration data from the calculated blood pressure value.
  • the blood pressure value is calculated for each beat by calibrating the pressure pulse wave detected by the pressure sensor using the calibration data.
  • Patent Documents 2, 3, and 4 describe a blood pressure measurement device that measures blood pressure for each beat using only information detected by a pressure sensor that is brought into contact with a wrist without using a cuff.
  • Patent Document 5 describes a heart rate monitor that detects a pulse wave and displays a heart rate.
  • This heart rate monitor has a mode for detecting the heart rate up to the decimal point and displaying the detected heart rate.
  • the heart rate can be displayed with high accuracy up to the decimal point, and the battery life of the cardiac pacemaker can be determined from the displayed heart rate.
  • Japanese Unexamined Patent Publication No. 2004-113368 Japanese Unexamined Patent Publication No. 02-261421 Japanese Unexamined Patent Publication No. 07-124130 Japanese Laid-Open Patent Publication No. 01-242301 Japanese Unexamined Patent Publication No. 58-203739
  • the display of blood pressure values is basically a 3-digit integer display.
  • Patent Documents 1 to 4 in a blood pressure measurement device that updates and displays a blood pressure value every beat, when the blood pressure value is displayed in a 3-digit integer display, the blood pressure value is stable. Will not change the display at all. If there is no change in the displayed blood pressure value, it cannot be determined whether blood pressure measurement for each beat is properly performed.
  • the heart rate meter described in Patent Document 5 supports the determination of the battery life of the heart pacemaker by displaying the heart rate to the decimal point when detecting the heart rate of the person wearing the heart pacemaker. .
  • the blood pressure value cannot be used to assist in determining the battery life of a cardiac pacemaker, it is impossible to apply the technique described in Patent Document 5 to a blood pressure measurement device.
  • the present invention has been made in view of the above circumstances, and provides a blood pressure measurement device and a blood pressure display control method by which a user can easily recognize whether blood pressure measurement for each beat is actually performed.
  • the purpose is to do.
  • the blood pressure measurement device of the present invention includes a blood pressure calculation unit that calculates a blood pressure value for each beat up to a numerical value after the decimal point with a unit of mmHg based on a pulse wave detected from a living body;
  • a display control unit configured to display an image indicating a part and an image indicating a part below the decimal point of the blood pressure value together with the display unit.
  • the blood pressure display control method of the present invention includes a blood pressure calculation step of calculating a blood pressure value for each beat up to a numerical value after the decimal point with a unit of mmHg based on a pulse wave detected from a living body, and the calculated blood pressure value
  • the present invention it is possible to provide a blood pressure measurement device and a blood pressure display control method by which a user can easily recognize whether blood pressure measurement for each beat is actually performed.
  • FIG. 2 is an enlarged view of a pressure pulse wave detection unit 100 shown in FIG. 1. It is the figure which looked at the pressure pulse wave detection part 100 in the mounting state shown in FIG. 1 from the fingertip side of the user. It is the figure which looked at the pressure pulse wave detection part 100 in the mounting state shown in FIG. 1 from the contact part side with a wrist. It is a figure which shows the block configuration of parts other than the pressure pulse wave detection part 100 of a blood pressure measurement apparatus. It is a flowchart for demonstrating operation
  • FIG. 6 is a diagram illustrating an example of an amplitude value of a pressure pulse wave detected by each pressure sensor of the sensor unit 6 when the pressure applied to the wrist by the sensor unit 6 is changed. It is a figure which shows the state which applies the pressure pulse wave detection part 100 to a wrist, and presses the sensor part 6 toward a wrist with the air bag 2.
  • FIG. It is the figure which showed an example of the change of the pressing force to a wrist, and the change of the pressure pulse wave detected by the optimal pressure sensor. It is a figure which shows an example of pulse wave envelope data.
  • FIG. 1 is an external view showing a configuration of a pressure pulse wave detection unit 100 of a blood pressure measurement device for explaining an embodiment of the present invention.
  • the blood pressure measurement device of the present embodiment is attached to a living body part (the wrist of a user in the example of FIG. 1) in which an artery (radial artery T in the example of FIG. 1) is present by a belt (not shown). Is possible.
  • FIG. 2 is an enlarged view of the pressure pulse wave detector 100 shown in FIG.
  • FIG. 3 is a view of the pressure pulse wave detection unit 100 in the wearing state shown in FIG. 1 as viewed from the fingertip side of the user.
  • FIG. 4 is a view of the pressure pulse wave detection unit 100 in the wearing state shown in FIG. 1 as viewed from the contact part side with the wrist. 1 to 4 schematically show the pressure pulse wave detection unit 100, and the dimensions and arrangement of the respective parts are not limited.
  • the pressure pulse wave detection unit 100 includes a housing 1 containing an air bag 2, a flat plate portion 3 that is a flat member fixed to the air bag 2, and a two-axis rotation mechanism 5 a for the flat plate portion 3.
  • the rotating unit 5 is rotatably supported around each of the two shafts, and the sensor unit 6 is provided on a plane opposite to the flat plate unit 3 side of the rotating unit 5.
  • the air bag 2 serves as a pressing unit that presses the pressing surface 6 b of the sensor unit 6 against the artery under the skin of the living body part (wrist) with the blood pressure measurement device mounted on the wrist.
  • the pressing part may be anything as long as it can press the pressing surface 6b of the sensor part 6 against the artery, and is not limited to one using an air bag.
  • the air bag 2 has a direction in which the flat plate portion 3 fixed to the air bag 2 is perpendicular to the surface of the flat plate portion 3 (a plane on the rotating portion 5 side) by controlling the amount of air inside by a pump (not shown). Move to.
  • the pressing surface 6b of the sensor unit 6 included in the pressure pulse wave detection unit 100 contacts the skin of the user's wrist.
  • the internal pressure of the air bag 2 increases, and the sensor unit 6 is pressed toward the radial artery T below the wrist.
  • the pressing force applied to the radial artery T by the sensor unit 6 is equivalent to the internal pressure of the air bag 2.
  • the pressing surface 6 b has a direction B (one direction) intersecting (orthogonal in the example of FIG. 1) with the extending direction A of the radial artery T present at the mounting site in the mounting state shown in FIG. 1.
  • a plurality of pressure sensors 6a are formed as pressure detecting elements.
  • a plurality of pressure sensors 7a arranged in the direction B are formed on the pressing surface 6b.
  • Each pressure sensor 6a and the pressure sensor 6a and the pressure sensor 7a having the same position in the direction B constitute a pair, and the pressing surface 6b has a plurality of pairs arranged in the direction B.
  • the pressure sensors (the plurality of pressure sensors 6a and the plurality of pressure sensors 7a) included in the pressure pulse wave detection unit 100 constitute a pressure detection unit.
  • the pressing surface 6b is a surface of a semiconductor substrate made of single crystal silicon or the like, and the pressure sensors 6a and 7a are constituted by pressure sensitive diodes or the like formed on the surface of the semiconductor substrate.
  • the pressure sensor 6a (7a) is a pressure vibration generated from the radial artery T and transmitted to the skin by being pressed against the radial artery T so that the arrangement direction intersects (substantially orthogonal) the radial artery T.
  • a wave that is, a pressure pulse wave is detected.
  • the intervals in the arrangement direction of the pressure sensors 6a (7a) are sufficiently small so that a necessary and sufficient number is arranged on the radial artery T.
  • the arrangement length of each pressure sensor 6a (7a) is necessary and sufficiently larger than the radial dimension of the radial artery T.
  • the biaxial rotation mechanism 5 a is a mechanism for rotating the rotation unit 5 around each of the two rotation axes X and Y orthogonal to the pressing direction of the flat plate portion 3 by the air bag 2. is there.
  • the biaxial rotation mechanism 5a has two rotation axes X and Y set on the surface of the flat plate portion 3 and orthogonal to each other, and the rotation axes X and Y are respectively driven to rotate by a rotation drive unit 10 described later.
  • the rotation axis Y is a first axis extending in the arrangement direction of the plurality of pressure sensors 6a (7a) formed on the pressing surface 6b.
  • the rotation axis Y is set between the element array including the plurality of pressure sensors 6a and the element array including the plurality of pressure sensors 7a (in the example of FIG. 4) in the plan view of FIG.
  • the rotation axis X is a second axis extending in a direction orthogonal to the arrangement direction of the plurality of pressure sensors 6a (7a) formed on the pressing surface 6b.
  • the rotation axis X is set on a straight line that equally divides the element array composed of the plurality of pressure sensors 6 a and the element array composed of the plurality of pressure sensors 7 a.
  • the rotation surface 5 rotates about the rotation axis X, so that the pressing surface 6b rotates around the rotation axis X.
  • the rotation surface 5 rotates around the rotation axis Y, so that the pressing surface 6 b rotates around the rotation axis Y.
  • FIG. 5 is a diagram showing a block configuration of a portion other than the pressure pulse wave detection unit 100 of the blood pressure measurement device.
  • the blood pressure measurement device includes a pressure pulse wave detection unit 100, a rotation drive unit 10, an air bag drive unit 11, a control unit 12 that performs overall control of the entire device, a display unit 13, an operation unit 14, and a memory 15. .
  • the rotation drive unit 10 is an actuator connected to each of the rotation axes X and Y of the biaxial rotation mechanism 5a of the pressure pulse wave detection unit 100.
  • the rotation drive unit 10 rotates the rotation axes X and Y according to instructions from the control unit 12 to rotate the pressing surface 6b around the rotation axis X, or the pressing surface 6b around the rotation axis Y. Or rotate it.
  • the air bag drive unit 11 controls the amount of air injected into the air bag 2 (internal pressure of the air bag 2) under the instruction of the control unit 12.
  • the display unit 13 is for displaying various information such as a measured blood pressure value, and is configured by, for example, a liquid crystal.
  • the operation unit 14 is an interface for inputting an instruction signal to the control unit 12, and includes a button for instructing the start of various operations including blood pressure measurement.
  • the memory 15 stores various information such as a ROM (Read Only Memory) for storing a program and data for causing the control unit 12 to perform a predetermined operation, a RAM (Randam Access Memory) as a work memory, and measured blood pressure data. Includes flash memory to store.
  • ROM Read Only Memory
  • RAM Random Access Memory
  • the control unit 12 executes a program stored in the ROM of the memory 15 to thereby execute a press control unit, a first blood pressure calculation unit, a rotation control unit, a second blood pressure calculation unit, a calibration data generation unit, and a display. Functions as a control unit.
  • the pressing control unit controls the pressing force applied to the wrist by the pressing surface 6b by controlling the air bag driving unit 11 and adjusting the amount of air in the air bag 2.
  • the first blood pressure calculating unit presses the pressure surface 6b in the radial artery T based on the pressure pulse wave detected by the pressure sensors 6a and 7a formed on the pressing surface 6b in a state where the pressing surface 6b is pressed against the radial artery T.
  • One blood pressure value is calculated.
  • the unit of the blood pressure value calculated in this specification is mmHg (millimeter mercury column).
  • the first blood pressure calculating unit detects the pressure pulse detected by the pressure sensors 6a and 7a in the process in which the pressing force to the radial artery T is changed (increased or decreased) by the air bag driving unit 11. Based on the wave, a first blood pressure value in radial artery T is calculated.
  • the calibration data generation unit generates calibration data using the first blood pressure value calculated by the first blood pressure calculation unit.
  • the rotation control unit is configured to press the pressure surface 6b of the rotation driving unit 10 based on the pressure pulse wave detected by the pressure sensors 6a and 7a in the process in which the pressing force to the radial artery T is increased by the air bag driving unit 11. The necessity of rotation is determined. When the rotation control unit determines that the rotation is necessary, the rotation control unit 10 rotates the pressing surface 6b.
  • the second blood pressure calculation unit detects each beat by the pressure sensors 6a and 7a in a state where the pressing surface 6b is pressed against the radial artery T with an optimal pressing force for deforming a part of the radial artery T flatly.
  • the second blood pressure value in the radial artery T is calculated for each beat by calibrating the pressure pulse wave to be calibrated.
  • the second blood pressure calculation unit calculates the second blood pressure value to the decimal part after the decimal point.
  • the second blood pressure calculation unit calculates the second blood pressure value to the second decimal place.
  • the control unit 12 calculates a value up to the second decimal place by rounding off the third decimal place, for example.
  • the display control unit controls the display unit 13 to display the second blood pressure value calculated by the second blood pressure calculation unit. Specifically, an image indicating an integer part of the second blood pressure value and an image indicating a decimal part of the second blood pressure value are respectively generated, and the generated two images are displayed on the display unit 13. Control to display together.
  • the blood pressure measurement device measures a blood pressure value (SBP (Systemic Blood Pressure), so-called systolic blood pressure and DBP (Diastroic Blood pressure)), so-called diastolic blood pressure, for each beat of the heart, and displays the display unit 13.
  • SBP Systemic Blood Pressure
  • DBP Diastroic Blood pressure
  • FIG. 6 is a flowchart for explaining the operation up to the generation of calibration data in the continuous blood pressure measurement mode of the blood pressure measurement device of the present embodiment.
  • the rotation unit 5 of the pressure pulse wave detection unit 100 has a rotation amount set to, for example, zero, and the pressing surface 6b is parallel to the flat plate part 3.
  • the state in which the rotation amount is zero is set as the initial state, but this is not restrictive.
  • the initial state is a state in which the rotation driving unit 10 rotates the pressing surface 6b so that the pressing surface 6b contacts the skin evenly according to the shape of the wrist. It is good also as a state.
  • control unit 12 controls the air bag driving unit 11 to start injecting air into the air bag 2 and increases the pressing force on the radial artery T by the pressing surface 6b (step S1). ).
  • the control unit 12 determines each pressure sensor 6a up to an arbitrary timing (for example, a periodic timing) after a sufficient time has elapsed to start the occlusion of the radial artery T.
  • a plurality of pressure pulse wave information I1 is acquired in order from the latest detection time among the pressure pulse waves (the pressure pulse wave information I1) detected and stored in the memory 15.
  • the control unit 12 detects the pressure pulse wave (the pressure pulse wave information I2) detected by each pressure sensor 7a and stored in the memory 15 at the above arbitrary timing in the order of detection time.
  • a plurality of pressure pulse wave information I2 is acquired (step S1A).
  • the control unit 12 calculates, for example, the average value Ave1 of the amplitude of the pressure pulse wave of each pressure sensor 6a detected at time t1 among the plurality of pressure pulse wave information I1 acquired in step S1A, and after time t1.
  • the average value Ave2 of the amplitude of the pressure pulse wave of each pressure sensor 6a detected at time t2 is calculated.
  • the control part 12 calculates the average value Ave3 of the amplitude of the pressure pulse wave of each pressure sensor 7a detected at time t1 among the plurality of pressure pulse wave information I2 acquired at step S1A, and detects it at time t2.
  • the average value Ave4 of the amplitude of the pressure pulse wave of each pressure sensor 7a is calculated.
  • the control part 12 calculates ratio ((Ave1 / Ave3) and (Ave2 / Ave4)) of the average value calculated with respect to the same time.
  • the control unit 12 determines whether or not the rotation unit 5 should be rotated by the rotation drive unit 10 based on the change in the ratio calculated for a plurality of timings. That is, the control unit 12 determines whether or not to rotate the rotating unit 5 based on the pressure pulse waves detected by the pressure sensors 6a and 7a at a plurality of timings in the increasing process of the pressing force (step S1B).
  • the element array composed of the pressure sensor 7a is directed in the direction of closing the radial artery T, but the element array composed of the pressure sensor 6a is the radial artery. It can be determined that T is not in the closing direction. For this reason, the control part 12 determines with rotation of the rotation part 5 being required.
  • the element array composed of the pressure sensor 6a is directed in the direction of closing the radial artery T, but the element array composed of the pressure sensor 7a is the radial artery. It can be determined that T is not in the closing direction. For this reason, the control part 12 determines with rotation of the rotation part 5 being required.
  • the control part 12 determines with the rotation of the rotation part 5 being unnecessary.
  • control unit 12 determines the necessity of rotation based on the variation in the ratio calculated for a plurality of timings. Instead of this ratio, a difference between the average value Ave1 (Ave2) and the average value Ave3 (Ave4) (a value considering the sign) may be used.
  • FIG. 7A is a diagram illustrating an example of a state in which the radial artery T is occluded by the element array including the pressure sensor 7a, but the radial artery T is not occluded by the element array including the pressure sensor 6a. .
  • the distance between the element array composed of the pressure sensor 6a and the radial artery T is larger than the distance between the element array composed of the pressure sensor 7a and the radial artery T.
  • step S1B determines that the rotation of the rotation unit 5 around the rotation axis Y is necessary
  • the control unit 12 determines the rotation axis Y of the rotation unit 5 according to the value of (6A / 7A) at the latest time.
  • the surrounding rotation is controlled (step S1C).
  • control unit 12 is a data table indicating the relationship between the value of (6A / 7A) and the rotation amount of the rotation unit 5 (obtained experimentally before product shipment and stored in the memory 15). , The rotation amount corresponding to the value of (6A / 7A) is read, and the read rotation amount is set.
  • control unit 12 determines which one of the average value 6A and the average value 7A is larger. If the average value 6A is large, the control unit 12 rotates to reduce the distance between the element array including the pressure sensor 6a and the radial artery T.
  • the rotation direction of the rotation unit 5 around the axis Y is set counterclockwise in FIG.
  • control unit 12 rotates the rotation direction of the rotation unit 5 around the rotation axis Y in the clockwise direction in FIG. 7 in order to reduce the distance between the element array including the pressure sensor 7a and the radial artery T.
  • the control unit 12 rotates the rotating unit 5 according to the rotation direction and the rotation amount set as described above. Thereby, as shown in FIG. 7B, the pressing surface 6b and the radial artery T can be made parallel, and the radial artery T can be closed by each of the two element rows.
  • step S ⁇ b> 2 the control unit 12 determines whether or not the pressing force has reached a pressure sufficient to close the radial artery T (necessary pressing force).
  • step S2: YES the control unit 12 controls the air bag driving unit 11 to stop the injection of air into the air bag 2 (step S3).
  • step S3 the control unit 12 returns the process to step S1A.
  • step S3 the control unit 12 determines between the amplitude of the pressure pulse wave detected by each pressure sensor 6a at the same time between step S1 and step S3, and the position on the pressing surface 6b of each pressure sensor 6a.
  • the control part 12 calculates
  • the control unit 12 generates a tonogram generated for the element array composed of the pressure sensors 6a from the identification information of the element array, the detection time of the pressure pulse wave, and the pressing force in the pressing direction by the air bag 2 at the detection time ( The pressure is stored in the memory 15 in association with the internal pressure of the air bag 2.
  • control unit 12 generates a tonogram generated for the element array including the pressure sensor 7a in the direction of pressing by the air bag 2 at the detection information of the element array, the detection time of the pressure pulse wave, and the detection time. It is stored in the memory 15 in association with the pressing force.
  • control part 12 calculates the moving amount
  • FIG. 8A and 8B are examples of the amplitude value of the pressure pulse wave detected by each pressure sensor 6a of the sensor unit 6 when the pressure applied to the wrist by the sensor unit 6 is changed.
  • FIG. 8A and 8B the horizontal axis indicates the position of each pressure sensor 6a in the direction B, and the vertical axis indicates the pressing force.
  • the amplitude of the pressure pulse wave detected by the pressure sensor 6a at each position is color-coded according to its magnitude.
  • Symbol A1 is a portion where the amplitude is greater than or equal to the threshold value TH1.
  • Symbol A2 is a portion where the amplitude is greater than or equal to threshold TH2 and less than threshold TH1.
  • Symbol A3 is a portion where the amplitude is greater than or equal to threshold TH3 and less than threshold TH2.
  • Symbol A4 is a portion where the amplitude is greater than or equal to threshold TH4 and less than threshold TH3.
  • Symbol A5 is a portion where the amplitude is less than the threshold value TH4. Note that threshold TH1> threshold TH2> threshold TH3> threshold TH4.
  • FIG. 8 (a) shows an example in which the position of the pressure sensor 6a that detects a pressure pulse wave having an amplitude greater than or equal to the threshold TH1 does not substantially change in the process of increasing the pressing force.
  • FIG. 8B shows an example in which the position of the pressure sensor 6a that detects a pressure pulse wave having an amplitude greater than or equal to the threshold TH1 is shifted to the left in the process of increasing the pressing force. Yes.
  • FIG. 9 is a diagram illustrating a state in which the pressure pulse wave detection unit 100 is applied to the wrist and the sensor unit 6 is pressed toward the wrist by the air bag 2.
  • the symbol TB indicates a rib
  • the symbol K indicates a tendon.
  • the radial artery T may move in the direction B as shown in FIG. 9 (b).
  • the distribution of amplitude values of the pressure pulse wave during pressing becomes as shown in FIG. 8B. That is, the position of the pressure sensor 6a that detected the amplitude value at the pressing force at which the amplitude value equal to or greater than the threshold TH1 was detected for the first time and the amplitude value at the pressure that was last detected as the amplitude value equal to or greater than the threshold TH1 were detected. A large deviation occurs from the position of the pressure sensor 6a.
  • the change in the position of the radial artery T in the direction B can be detected by looking at the change in the tonogram in the process of changing the pressing force. If the radial artery T is occluded by increasing the pressing force in the state shown in FIG. 9B, there is a possibility that an accurate tonogram cannot be obtained due to the influence of the living tissue such as the tendon K.
  • the control unit 12 detects the position of the pressure sensor 6a that has detected the amplitude value in the pressing force in which the amplitude value equal to or greater than the threshold value TH1 is first detected from the data in FIG. 8 showing the relationship between the pressing force and the tonogram, and the threshold value TH1.
  • the difference (that is, the amount of movement in the direction B of the radial artery T) with the position of the pressure sensor 6a that detected the amplitude value in the pressing force in which the above amplitude value was finally detected is calculated in step S6. It is determined whether or not the difference is greater than or equal to a threshold value THa (step S7).
  • step S7 If the difference between the two positions is equal to or greater than the threshold THa (step S7: YES), the control unit 12 obtains the vector indicated by the arrow in FIG. 8B in step S8. If the difference between the two positions is less than the threshold THa (step S7: NO), the process of step S9 is performed.
  • the direction and magnitude of the vector shown in FIG. 8 and information indicating in what direction and how much the rotating unit 5 should be rotated around the rotation axis X are obtained in advance and correlated. And remember.
  • control unit 12 acquires information about the rotation direction and the rotation amount corresponding to the obtained vector size and direction from the memory 15 and transmits the acquired information to the rotation drive unit 10. And the rotation drive part 10 rotates the rotation part 5 as shown in FIG.9 (c) according to the received information (step S8).
  • the control unit 12 determines the rotation unit based on the pressure pulse waves detected by the pressure sensors 6a and 7a at a plurality of timings in the process of increasing the pressing force by the air bag 2. Whether or not 5 needs to be rotated is determined in steps S1B and S7. And when it is necessary to rotate the rotation part 5 (step S1B: YES, step S7: YES), the control part 12 is based on the pressure pulse wave detected by each pressure sensor 6a, 7a. The moving part 5 is rotated.
  • step S9 following step S8, the control unit 12 controls the air bag drive unit 11 to discharge the air in the air bag 2 and starts to reduce the pressing force on the radial artery T.
  • the control unit 12 starts decreasing the pressing force in step S9, reduces the pressing force to the minimum value, and then determines an optimum pressure sensor from among all the pressure sensors 6a and 7a. For example, the control unit 12 determines the pressure sensor that has detected the pressure pulse wave having the maximum amplitude in the process of decreasing the pressing force as the optimum pressure sensor.
  • the pressure pulse wave detected by the pressure sensor located directly above the portion where the radial artery T is flat is not affected by the tension of the wall of the radial artery T and has the largest amplitude.
  • This pressure pulse wave has the highest correlation with the blood pressure value in the radial artery T. For this reason, the pressure sensor that detects the pressure pulse wave having the maximum amplitude is determined as the optimum pressure sensor.
  • the plurality of pressure sensors are treated as optimum pressure sensors, and the pressure pulses detected by each of the plurality of pressure sensors are detected.
  • an average of the waves may be handled as a pressure pulse wave detected by the optimum pressure sensor.
  • control part 12 produces
  • the pulse wave envelope data is detected by the optimal pressure sensor when the sensor 6 presses the radial artery T against the radial artery T (the internal pressure of the air bag 2) and the optimal pressure sensor is pressed against the radial artery T by the pressing force. It is the data which matched the amplitude of the pressure pulse wave to be performed.
  • FIG. 10 is a diagram showing an example of a change in the pressing force on the radial artery T and a change in the pressure pulse wave detected by the optimum pressure sensor.
  • the straight line indicated by the symbol P indicates the pressing force
  • the waveform indicated by the symbol M indicates the pressure pulse wave.
  • an enlarged view of one pressure pulse wave is shown.
  • the pressure at the rising point is referred to as the minimum value Mmin
  • the pressure at the falling point is referred to as the maximum value Mmax.
  • the amplitude of the pressure pulse wave is a value obtained by subtracting the minimum value Mmin from the maximum value Mmax.
  • the maximum value Mmax and the minimum value Mmin are each information that specifies the shape of the pressure pulse wave.
  • step S10 the control unit 12 generates pulse wave envelope data as shown in FIG. 11 from the relationship between the pressing force and the pressure pulse wave shown in FIG.
  • control unit 12 calculates SBP and DBP from the generated pulse wave envelope data (step S11).
  • the control unit 12 starts to decrease the pressing force when the pressure pulse wave amplitude starts to increase rapidly after the pressing force starts to decrease, that is, the pressing force starts to decrease. Thereafter, the pressing force at the time when the pressure pulse wave amplitude detected by the optimum pressure sensor first exceeds the threshold value THb that can be determined to be no longer in the arterial occlusion state is determined as SBP.
  • the control unit 12 calculates a difference between two adjacent amplitude values in the pulse wave envelope data, and determines the pressing force when the difference exceeds a threshold value as SBP.
  • control unit 12 determines the maximum value Mmax and the minimum value of any one of the pressure pulse waves (for example, the pressure pulse wave having the maximum amplitude) detected by the optimum pressure sensor determined in the pressure reduction process of step S9. Using the value Mmin and the SBP and DBP calculated in step S11, calibration data used at the time of continuous blood pressure measurement described later is generated and stored in the memory 15 (step S12).
  • the control unit 12 adds the SBP and DBP obtained in step S11 to the equations (1) and (2), and the maximum value Mmax and the minimum value of the pressure pulse wave having the maximum amplitude in the pulse wave envelope of FIG. Substituting Mmin, slope a and intercept b are calculated. The calculated coefficients a and b and equations (1) and (2) are stored in the memory 15 as calibration data.
  • FIG. 12 is a flowchart for explaining the continuous blood pressure measurement operation in the continuous blood pressure measurement mode of the blood pressure measurement device of the present embodiment.
  • control unit 12 controls the air bag drive unit 11 to increase the internal pressure of the air bag 2, and the pressing force to the radial artery T by the pressing surface 6 b Is increased (step S21).
  • control unit 12 determines the pressure sensor that detects the pressure pulse wave having the maximum amplitude in the process of increasing the pressing force among the pressure sensors 6a and 7a as the optimum pressure sensor. Moreover, the control part 12 determines the internal pressure of the air bag 2 at the time of detecting the pressure pulse wave of this maximum amplitude as an optimal pressing force (step S22).
  • control unit 12 releases the internal pressure of the air bag 2 and returns it to the initial state (step S23), and then increases the internal pressure of the air bag 2 to the optimum pressing force determined in step S22. The pressure is maintained (step S24).
  • control unit 12 acquires the pressure pulse wave detected by the optimal pressure sensor determined in step S22 in a state where the pressing surface 6b is pressed against the radial artery T with the optimal pressing force (step S25).
  • control unit 12 calibrates the acquired one pressure pulse wave using the calibration data generated in Step S12 of FIG. 6, and calculates SBP and DBP (Step S26).
  • control unit 12 calculates the SBP by substituting the maximum value Mmax of the pressure pulse wave acquired in step S25 and the coefficients a and b calculated in step S12 into the above-described equation (1).
  • the DBP is calculated by substituting the pressure minimum value Mmin of the pressure pulse wave acquired in S25 and the coefficients a and b calculated in step S12 into the above-described equation (2).
  • the control unit 12 displays the calculated SBP and DBP on the display unit 13 and notifies the user.
  • the control unit 12 ends the process if there is an instruction to end continuous blood pressure measurement (step S27: YES), and returns the process to step S25 if there is no instruction to end (step S27: NO).
  • FIG. 13 is a diagram illustrating a display example of the SBP calculated in step S26.
  • the control unit 12 displays the number image 13a indicating the integer part “110” of the SBP and the number indicating the decimal part “.36” of the SBP.
  • An image 13b is generated.
  • the control unit 12 displays the generated two numeric images 13a and 13b on the same screen as shown in FIG.
  • a number image is an image showing an arbitrary number itself.
  • the control unit 12 generates calibration data using the first blood pressure value calculated based on the pressure pulse wave detected by the sensor unit 6 in the process of decreasing the pressing force. That is, the control unit 12 mainly uses the pressure pulse wave obtained in the process of changing the pressing force regardless of the pressure pulse wave detected in a state where the sensor unit 6 is pressed and held with the optimal pressing force. Can be calculated. Therefore, the blood pressure can be calculated without going through the three steps of increasing the internal pressure of the air bag 2, releasing the internal pressure of the air bag 2, and increasing the internal pressure of the air bag 2 to the optimum pressure.
  • the blood pressure value calculated for each beat is displayed up to the portion after the decimal point (decimal portion) as illustrated in FIG.
  • the blood pressure value display is updated at any time even when the blood pressure value does not change greatly and the numerical value of the integer part of SBP or DBP does not change.
  • the display of the blood pressure value is updated as needed, so that the user can easily recognize that the blood pressure measurement is properly performed. Therefore, it is possible to expect effects such as being able to notice this immediately when the device is out of order, and not being concerned about whether blood pressure is being measured.
  • the blood pressure value is displayed up to the decimal part, the user can recognize fine blood pressure fluctuations, which can be useful for own physical condition management.
  • the blood pressure measurement device of the present embodiment can also be provided with a mode for measuring blood pressure at an arbitrary timing and presenting it to the user.
  • the control unit 12 performs the processing from step S1 to step S11 in FIG. 6 so that the blood pressure can be measured and presented in a short time without bothering the user. It becomes possible.
  • the control unit 12 preferably performs control to display only the integer part of the calculated blood pressure value on the display unit 13.
  • the control unit 12 causes the display unit 13 to display SBP and DBP together.
  • the control unit 12 may perform control to display the blood pressure value up to the decimal part for only one of SBP and DBP. By performing such control, it is possible to reduce the possibility that the user feels uncomfortable. In addition, it is possible to improve the visibility of the integer part of the blood pressure value, which is the most important information for the user.
  • FIG. 14 is a diagram showing a first modification of the display example of SBP calculated in step S26 of FIG.
  • control unit 12 generates and displays a numeric image 13c having a numeric character size smaller than the numeric image 13a as an image indicating the decimal part “0.36” of the SBP.
  • the portion below the decimal point in the SBP is small and is not noticeable. For this reason, it is possible to prevent the user from feeling uncomfortable. Since it is necessary to display SBP and DBP together in the blood pressure measurement device, the configuration of the first modification is particularly effective in reducing the sense of discomfort.
  • FIG. 15 is a diagram showing a second modification of the SBP display example calculated in step S26 of FIG.
  • control unit 12 generates and displays a numerical image 13d having a display density lower than that of the numerical image 13a as an image indicating the decimal part “0.36” of the SBP.
  • the portion below the decimal point in the SBP is low in density and becomes inconspicuous. For this reason, it is possible to prevent the user from feeling uncomfortable. Since it is necessary to display SBP and DBP together in the blood pressure measurement device, the configuration of the second modification is particularly effective for reducing the sense of incongruity.
  • FIG. 16 is a diagram showing a third modification of the SBP display example calculated in step S26 of FIG.
  • control unit 12 generates a non-numeric image 13e that deforms according to the size of the decimal part instead of the numeric image as an image indicating the decimal part “0.36” of the SBP. It is displayed.
  • a non-numeric image is not an image that directly indicates a numerical value, but an image that indirectly indicates a numerical value (a numerical value represented by a graphic).
  • FIG. 16 (b) shows a state in which the decimal part of the SBP is larger than that in FIG. 16 (a).
  • the SBP is 110.20 or more and less than 110.40.
  • the SBP is 110.80 or more and less than 111.00.
  • the third modification since the portion below the decimal point in the SBP is displayed as a non-numeric image, the integer portion and the decimal portion can be more clearly identified, and the user feels uncomfortable. It can prevent giving. In addition, since the size of the decimal part can be intuitively grasped, for example, heartbeat fluctuation can be easily known. In the blood pressure measurement device, since SBP and DBP need to be displayed together, the configuration of the third modification is particularly effective in reducing the sense of incongruity.
  • FIG. 17 is a diagram showing a fourth modification of the display example of SBP calculated in step S26 of FIG.
  • control unit 12 generates a non-numeric image 13f that is deformed according to the size of the decimal part instead of the numeric image as an image indicating the decimal part “0.36” of the SBP. It is displayed.
  • the non-numeric image 13f has scales of “00”, “50”, and “99” indicating “0.00”, “0.50”, and “0.99”, respectively.
  • the fourth modification since the portion below the decimal point in the SBP is displayed as a non-numeric image, the same effect as the third modification can be obtained.
  • control unit 12 may display different colors for the integer part and the decimal part. For example, it is possible to reduce a sense of incongruity by displaying the decimal part in a color that is not conspicuous.
  • a program is recorded on a non-transitory recording medium in which the program can be read by a computer.
  • Such “computer-readable recording medium” includes, for example, an optical medium such as a CD-ROM (Compact Disc-ROM) or a magnetic recording medium such as a memory card. Such a program can also be provided by downloading via a network.
  • an optical medium such as a CD-ROM (Compact Disc-ROM)
  • a magnetic recording medium such as a memory card.
  • Such a program can also be provided by downloading via a network.
  • the SBP and DBP calculation method for each beat and the configuration of the pressure pulse wave detection unit 100 are not limited to those described so far, and well-known ones as described in Patent Documents 1 to 4 can be used. It may be adopted.
  • the blood pressure value is measured for each beat based on the pressure pulse wave detected from the wrist by the pressure pulse wave detecting unit 100, but the method for measuring the blood pressure value for each beat is described here. Not exclusively.
  • a volume pulse wave may be detected, and a blood pressure value may be calculated based on the volume pulse wave.
  • the disclosed blood pressure measurement device includes a blood pressure calculation unit that calculates a blood pressure value for each beat up to a numerical value after the decimal point in units of mmHg based on a pulse wave detected from a living body, and an integer of the calculated blood pressure value
  • a display control unit configured to display an image indicating a part and an image indicating a part below the decimal point of the blood pressure value together with the display unit.
  • the disclosed blood pressure measurement device further includes a pressing unit that presses the pressure detection unit against an artery under the skin of the living body, and the blood pressure calculation unit is in a state in which the pressure detection unit is pressed against the artery by the pressing unit. Based on the pressure pulse wave detected by the pressure detector, the blood pressure value in the artery for each beat is calculated.
  • the display control unit causes the display unit to display a numeric image as each of an image showing the integer part and an image showing a part after the decimal point, and a numeric image showing the integer part;
  • the numerical image indicating the portion after the decimal point is displayed in a different display form.
  • the display control unit displays the numeric image indicating the integer part and the numeric image indicating the part after the decimal point in different colors.
  • the display control unit displays a numeric image indicating a part after the decimal point with a smaller character size than a numeric image indicating the integer part.
  • the display control unit displays a numerical image indicating the portion after the decimal point at a lower density than the numerical image indicating the integer portion.
  • the display control unit causes the display unit to display a numerical image as an image indicating the integer part, and the numerical value of the part below the decimal point as an image indicating the part below the decimal point.
  • the figure which represents is displayed.
  • the disclosed blood pressure display control method includes a blood pressure calculation step of calculating a blood pressure value for each beat up to a numerical value after the decimal point with a unit of mmHg based on a pulse wave detected from a living body, and the calculated blood pressure value
  • the present invention it is possible to provide a blood pressure measurement device and a blood pressure display control method by which a user can easily recognize whether blood pressure measurement for each beat is actually performed.

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  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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Abstract

L'invention concerne un dispositif de mesure de tension artérielle et un procédé de commande d'affichage de tension artérielle, un utilisateur pouvant facilement reconnaître si une tension artérielle battement par battement est réellement en train d'être mesurée. Des capteurs de pression 6a, 7a sont pressés contre une artère radiale T sous la peau d'un corps vivant et, dans cet état, une unité de commande 12 calcule une valeur de tension artérielle battement par battement dans l'artère radiale T à une valeur numérique après la virgule sur la base d'ondes d'impulsion de pression détectées par les capteurs de pression 6a, 7a. L'unité de commande 12 amène une unité d'affichage 13 à afficher une image indiquant la partie entière de la valeur de la tension artérielle calculée conjointement avec une image indiquant la partie après la virgule de la valeur de la tension artérielle.
PCT/JP2016/055587 2015-02-27 2016-02-25 Dispositif de mesure de tension artérielle et procédé de commande d'affichage de tension artérielle Ceased WO2016136865A1 (fr)

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WO2018030514A1 (fr) 2016-08-12 2018-02-15 シャープ株式会社 Batterie solaire sensibilisée aux colorants et procédé pour sa fabrication
JP7166085B2 (ja) * 2018-06-22 2022-11-07 日本光電工業株式会社 生体情報表示装置、および生体情報出力方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4839489B1 (fr) * 1969-04-03 1973-11-24
JPS57169980A (en) * 1981-04-13 1982-10-19 Matsushita Electric Ind Co Ltd Magnetic recorder and reproducer
JPS58123482U (ja) * 1982-02-16 1983-08-22 三菱電機株式会社 電子式数字表示装置
JPS5977380A (ja) * 1982-10-26 1984-05-02 Seiko Epson Corp 電子時計の緩急機構
JPH02261421A (ja) * 1989-04-03 1990-10-24 Koorin Denshi Kk 血圧モニタ装置
WO2014116679A1 (fr) * 2013-01-22 2014-07-31 The Charlotte-Mecklenburg Hospital Authority D/B/A Carolinas Healthcare System Dispositifs, systèmes et procédés pour surveiller une pression sanguine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4839489B1 (fr) * 1969-04-03 1973-11-24
JPS57169980A (en) * 1981-04-13 1982-10-19 Matsushita Electric Ind Co Ltd Magnetic recorder and reproducer
JPS58123482U (ja) * 1982-02-16 1983-08-22 三菱電機株式会社 電子式数字表示装置
JPS5977380A (ja) * 1982-10-26 1984-05-02 Seiko Epson Corp 電子時計の緩急機構
JPH02261421A (ja) * 1989-04-03 1990-10-24 Koorin Denshi Kk 血圧モニタ装置
WO2014116679A1 (fr) * 2013-01-22 2014-07-31 The Charlotte-Mecklenburg Hospital Authority D/B/A Carolinas Healthcare System Dispositifs, systèmes et procédés pour surveiller une pression sanguine

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