JP2013183804A - Sphygmomanometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sphygmomanometer that can issue an instruction of pressurization stop by determining that manual pressurizing force to an airbag in an arm belt part mounted on an upper arm is appropriate.SOLUTION: A sphygmomanometer 1 includes: airbags 20, 40 arranged in an arm belt part 3, which supplies air to pressurize an upper arm T; a pressure sensor 110 for detecting the pressure in the airbag; a buzzer 114; and a control part 100 which notifies an instruction of pressurization stop by the buzzer 114 by determining that a predetermined pressurizing force is obtained by the pressurization of the arm belt part 3 after at least one pulse wave MN is detected by a pressure detection signal from the pressure sensor 110 during the pressurization of the upper arm T, when blood pressure is measured by mounting the arm belt part 3 on the upper arm T of a patient to manually pressurize the airbag in the arm belt part.

Description

  The present invention relates to a sphygmomanometer that wraps an armband around an upper arm and manually pressurizes an air bag of the armband to measure a patient's blood pressure.

  For example, a sphygmomanometer used by a medical staff such as a nurse in a medical institution includes, for example, a manual pressurization type that integrates an air balloon for feeding air to an armband and a sphygmomanometer body. The arm band portion of the blood pressure monitor has an ischemic air bag for blocking the artery and an arterial pulsation detecting air bag attached to the ischemic air bag. When a medical worker manually holds or releases the air balloon, air is sent from the sphygmomanometer body through the tube to the air bag for ischemia in the armband, and the patient's upper arm is pressurized to measure blood pressure. Medical personnel can easily operate the air balloon with one hand, and when sending air to the air bag for ischemia in the armband, a motor to send air is unnecessary, so quiet blood pressure measurement should be performed even at night (See Patent Document 1).

Japanese Patent No. 4673020

  When blood pressure measurement is performed using this type of blood pressure monitor, the medical worker himself / herself judges the pressure to stop the pressurizing operation with the air balloon, and stops the pressurizing operation with the air balloon. . For this reason, when the blood pressure value of the patient who is the subject is high, insufficient pressurization on the upper arm is likely to occur. Thus, when insufficient pressurization occurs, it is necessary for the medical worker to perform the pressurization operation with the air balloon again to measure the blood pressure again, so that the blood pressure measurement time is increased. Moreover, when the blood pressure value of the patient is low, overpressure may occur. If overpressurization occurs, numbness may occur in the upper arm of the patient, which may cause an extra burden on the patient. Therefore, an object of the present invention is to provide a sphygmomanometer that can determine that the pressure applied to the upper arm is appropriate and issue a pressurization stop instruction when the upper arm is pressurized.

  The sphygmomanometer according to the present invention is a sphygmomanometer that measures blood pressure by attaching an arm band part to the upper arm of a person to be measured and manually pressurizing the air balloon, and is disposed in the arm band part and the air balloon An air bag for blocking the upper arm by supplying air from the air bag, an air bag for detecting arterial pulsation, which is disposed in the arm band portion and supplied with the air from the air balloon, and for the ischemic purpose A pressure sensor for detecting the pressure in the air bag and the pressure in the air bag for detecting arterial pulsation, an informing unit, and at least one of pressure detection signals from the pressure sensor during pressurization of the air bag. A control unit configured to determine that a predetermined pressurizing force has been obtained by pressurizing the armband portion by detecting a pulse wave, and to issue a command to the notification unit to notify a pressurization stop instruction It is characterized by that. According to the above configuration, when pressurizing the air bag for ischemia and the air bag for detecting arterial pulsation, it is possible to determine that the pressure is appropriate and issue a pressurization stop instruction. That is, when the control unit detects at least one pulse wave from the pressure detection signal from the pressure sensor, the control unit determines that a predetermined pressurizing force has been obtained by pressurizing the armband unit, and issues a command to the notification unit. Since the pressurization stop instruction is notified, the medical staff can surely know the timing to stop pressurization by the pressurization stop instruction from the notification unit. For this reason, when the blood pressure value of the patient is high, insufficient pressurization on the upper arm does not occur, so that the measurement time is not shortened without re-measurement. In addition, it is possible to prevent overpressurization when the blood pressure value of the patient is low, so that no extra burden is placed on the patient.

Preferably, the control unit is configured to detect 1 from a pressure detection signal of the pressure sensor from the air bag for detecting arterial pulsation during pressurization to the air bag for detecting ischemia and the air bag for detecting arterial pulsation. If one pulse wave is detected and a new pulse wave cannot be detected thereafter, it is determined that the predetermined pressure is obtained by pressurizing the armband, and a command is given to the notification unit. The notification unit is configured to notify the pressurization stop instruction.
According to the above configuration, the control unit can detect one pulse wave during pressurization of the air bag for ischemia and the air bag for arterial pulsation detection, and then can detect a new pulse wave. If it is not, the determination that the predetermined pressure is obtained by pressurizing the armband portion can be made more precise.

Preferably, the control unit, from the pressure detection signal of the pressure sensor from the air bag for detecting arterial pulsation during pressurization to the air bag for detecting ischemia and the air bag for detecting arterial pulsation, A plurality of pulse waves are detected, the pulse wave having the maximum amplitude is confirmed from the plurality of pulse waves, and the pulse wave amplitude after the confirmed pulse wave having the maximum amplitude is determined in advance. When the amplitude is equal to or smaller than the threshold value of the amplitude, it is determined that the predetermined pressurizing force has been obtained, and a command is given to the notifying unit so that a pressurization stop instruction is notified by the notifying unit.
According to the above configuration, the control unit detects the pressure of the pressure sensor from the air bag for detecting arterial pulsation during pressurization of the air bag for ischemia and the air bag for detecting arterial pulsation. When a plurality of pulse waves are detected from the signal and a pulse wave having the maximum amplitude is detected from the plurality of pulse waves, and then the pulse wave amplitude falls below a predetermined pulse wave amplitude threshold value, It is possible to make a more precise determination that the applied pressure is obtained.

Preferably, the control unit generates a pressure detection signal of the pressure sensor from the air bag for detecting arterial pulsation during pressurization to the air bag for detecting ischemia and the air bag for detecting arterial pulsation. A plurality of cut-out sections are provided for the pressure drop portion of the pressure fluctuation waveform, and the pulse wave is detected by checking the presence or absence of the pulse wave in the cut-out section.
According to the above configuration, the presence or absence of a predetermined pressurizing force can be easily performed by reliably detecting the pulse wave generated in the pressure drop portion of the pressure fluctuation waveform in the cut-out section.

Preferably, the armband portion is provided with the air bag for ischemia and an air bag for detecting arterial pulsation, and the air bag for detecting ischemia and the air bag for detecting arterial pulsation are arm bands. It is housed by a part cover.
According to the above configuration, the air bag for detecting arterial pulsation and the air bag for detecting arterial pulsation are housed in the armband cover, so that the air bag for detecting arterial pulsation can be easily positioned according to the artery of the upper arm. Can be wound. For this reason, accurate blood pressure measurement can be performed.

  Preferably, the blood pressure monitor main body has a blood pressure monitor main body connected to the air bag for ischemia and the air bladder for detection of arterial pulsation using a tube. And a balloon for sending the air through the tube to the air bag for ischemia and the air bag for detecting arterial pulsation. According to the above configuration, the medical worker can wrap the armband portion while easily positioning the armband portion on the upper arm with only one other hand while the medical worker has the air balloon with one hand. Winding workability can be improved.

  In the present invention, when manually pressurizing an air bag in an arm band attached to the upper arm with an air balloon, it is possible to determine that the pressure applied to the air bag is appropriate and to issue a pressure stop instruction. A total can be provided.

1 is a perspective view showing a first preferred embodiment of a sphygmomanometer according to the present invention. The front view of the sphygmomanometer shown in FIG. The figure which shows the example of the display item which the display part 8 can display. The figure which shows the example of a control circuit block arrange | positioned in the blood pressure meter main-body part, and the structural example of an armband part. The perspective view which shows the state which an arm band part is going to wind. 6A shows an inner surface side of the armband portion, and FIG. 6B is a perspective view showing an outer surface side of the armband portion. FIG. 7A is a plan view showing the outer surface side of the armband portion, and FIG. 7B shows an air bag for ischemia and an air bag for detecting arterial pulsation arranged inside the armband portion. The top view which shows the example of a shape. The figure which shows the example of the procedure which winds an arm belt part directly on the bare skin of the upper arm T of a patient. The sphygmomanometer of 1st Embodiment of this invention WHEREIN: The figure which shows the example of a change of the pressure from which the pressure applied with respect to an upper arm by the air bag for ischemia changes with time passage. The figure which shows the graph example of the pressure fluctuation waveform VL which generate | occur | produces when an air balloon sends air when it is going to pressurize the upper arm T by the arm belt | band | zone part shown in FIG. FIG. 11A shows only the pressure drop portion VL2 of the pressure fluctuation waveform VL shown in FIG. 10, and FIG. 11B shows the average value for detecting the pulse wave MN from the pressure drop portion VL2. The figure which shows a mode that the pulse wave MN is detected by taking the difference. The figure which shows the example which CPU of FIG. 4 has detected one pulse wave MN in the middle of the pressure rise in the pressure rise period t1 by pressurizing the air balloon shown in FIG. FIG. 13 is a flowchart showing a procedure in which when the CPU can detect only one pulse wave as shown in FIG. FIG. 4 shows a second embodiment of the present invention, and the CPU of FIG. 4 generates a plurality of pulse waves MN1 to MN5 during the pressure increase in the pressure increase period t1 by pressurizing the air balloon shown in FIG. The figure which shows the example which is detecting. As shown in FIG. 14, the maximum amplitude pulse wave MN2 is confirmed from the detected plurality of pulse waves, and the amplitude of the pulse wave MN4 after the maximum amplitude pulse wave MN2 is equal to or less than a predetermined threshold THE. The flowchart which shows the procedure which CPU judges that the applied pressure with respect to an upper arm is enough by an arm band part, and notifies a pressurization stop sometimes.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

(First embodiment of the present invention)
FIG. 1 is a perspective view showing a preferred first embodiment of a sphygmomanometer according to the present invention. FIG. 2 is a front view of the sphygmomanometer shown in FIG.
As shown in FIG. 1, the sphygmomanometer 1 can measure a patient's blood pressure by pressurizing the patient's upper arm T by a manual pressurization method by a medical staff such as a nurse. This manual pressurization type sphygmomanometer 1 has an air balloon (pressurization unit) and a sphygmomanometer main body integrated, and a medical worker can pressurize the air balloon with one hand, Therefore, it is possible to measure blood pressure quietly even at night.

  When using the sphygmomanometer 1, the medical staff can select three measurement modes according to the patient's pathological condition. The three measurement modes are a normal mode, a slow mode, and an auscultation mode. The normal mode is a mode in which blood pressure measurement can be performed more quickly by automatic measurement. Slow mode is a mode in which the pressure reduction rate after pressurization can be set slower than the pressure reduction rate after pressurization in normal mode, and blood pressure can be measured for patients with low blood pressure or patients with weak pulses. It is. The auscultation mode is a mode in which a medical worker measures blood pressure by an auscultation method using a stethoscope without performing automatic measurement.

The measurement method in the sphygmomanometer 1 shown in FIGS. 1 and 2 is an oscillometric method (so-called double cuff method), and as shown in FIG. 1, the measurement target site is the upper arm T of a patient who is a subject. As a power source to be used, for example, a dry battery is used.
As shown in FIGS. 1 and 2, the sphygmomanometer 1 has a sphygmomanometer main body 2 and an armband 3. The sphygmomanometer main body 1 has a housing 4 and an air balloon 5. The air balloon 5 is made of a stretchable material so that a medical worker can pressurize the internal air. The air balloon 5 is a rubber balloon, for example.

A housing 4 of the sphygmomanometer main body 2 shown in FIGS. 1 and 2 is made of plastic, and has a rectangular display unit 8, a power switch 9, a mode switch 10, and an exhaust switch 11. The display unit 8 is, for example, a liquid crystal display device or an organic EL (electroluminescence) display device, and may be a single color display or a color display. The display unit 8 can display a maximum blood pressure value, a minimum blood pressure value, a pulse rate, and which of the three measurement modes described above is selected.
The power switch 9 can be turned on or off by the medical staff by pressing the power switch 9. When the medical switch is pressed, the mode switch 10 can switch the measurement mode to any of the above-described normal mode, slow mode, and auscultation mode. The exhaust switch 11 can be forcibly discharged by a medical worker by pushing the air in the blood bag for ischemia and the air bag for detecting arterial pulsation in the armband portion 3 described later.

  The two tubes 6 and 7 are flexible tubes that connect the housing 4 of the sphygmomanometer body 2 and the armband 3. The tube 6 is thicker than the tube 7. One end portion 6 </ b> B of the tube 6 is connected to the upper portion of the housing 4 via the connector portion 12. One end portion 7B of the tube 7 is connected to the upper portion of the housing 4 via a plug 7C and a connector portion 12. The vicinity of the ends 6B and 7B of the tubes 6 and 7 are fixed by a holder 13. As described above, the tubes 6 and 7 are fixed by the holder 13 so that the tubes 6 and 7 are not separated, but the one end portion 7B of the thin tube 7 is connected to the one end portion 6B of the thick tube 6. In comparison, the length of the tube 6 is provided with a margin so that the movement of the tube 7 can follow the movement of the tube 6. As a result, even if the thick tube 6 is pulled in an unreasonable direction by pulling the thick tube 6, the thin tube 7 is not pulled by being pulled by the thick tube 6.

  As shown in FIG. 1, an extension portion 14 is formed on the lower portion of the housing 4 so as to protrude downward. The extension portion 14 is a thin plate-like member that covers a part of the front portion 5S of the air balloon 5. As shown in FIG. 2, the medical staff repeats the operation of grasping and releasing the air balloon 5 while supporting the extension 14 with the fingers of the hand H, whereby the air from the air balloon 5 is converted into the blood pressure monitor main body 2. It can be supplied to the air bag for ischemia and the air bag for detecting arterial pulsation in the armband portion 3 through the inner pipe and the tubes 6 and 7. Projections 4T are formed on both sides of the housing 4.

In FIG. 3, the example of the display item which the display part 8 can display is shown.
As shown in FIG. 3, the display unit 8 includes a maximum blood pressure value display area 8A, a minimum blood pressure value display area 8B, a pulse display area 8C, a pulse wave signal display area 8D, a previous value display area 8E, and a display area during exhaust. 8F, under-pressurized display area 8G, over-pressurized display area 8H, and selected mode display area 8K.
The systolic blood pressure value display area 8A displays the instantaneous pressure of blood pressure during pressurization and decompression, and finally displays the systolic blood pressure value. The lowest blood pressure value display area 8B displays the lowest blood pressure value finally determined.

  The pulse display area 8C shown in FIG. 3 displays the measured pulse value. The pulse wave signal display area 8D displays the magnitude of the detected pulse wave signal, and the magnitude of the pulse wave signal is displayed in a bar shape that moves to the left and right. In the case of a patient with a normal pulse, the display of the magnitude of the pulse wave signal rhythmically increases or decreases from side to side, but in the case of a patient with arrhythmia, the display of the magnitude of the pulse wave signal Rhythmically does not increase or decrease from side to side. By providing this pulse wave signal display region 8D, it is possible to visually determine whether or not the patient who is the subject has arrhythmia.

  The previous value display area 8E shown in FIG. 3 blinks or lights up when the power switch 9 is pressed to activate the operation of the sphygmomanometer body 2, and the highest blood pressure value, lowest blood pressure value, and pulse value measured last time are the highest. It is displayed in the hypertension value display area 8A, the minimum blood pressure value display area 8B, and the pulse display area 8C. Then, after a while or when the air balloon 5 is operated to supply air, the display of the highest blood pressure value, the lowest blood pressure value, and the pulse value measured last time disappears, and the display area 8E for the previous value is displayed. When the power switch 9 is pressed and the operation of the sphygmomanometer body 2 is started, the blinking or lighting is also extinguished. The display area 8 </ b> F during exhausting blinks when the air in the air bag for ischemia and the air bag for detecting arterial pulsation in the armband 3 is rapidly exhausted. The display area 8F during exhaust also blinks when the exhaust switch 11 is pressed.

When the underpressurized display area 8G shown in FIG. 3 is lit or blinking, it indicates that the pressure in the armband 3 has not reached a level sufficient for blood pressure measurement. Can be further encouraged to send air using the air balloon 5.
When the overpressurization display area 8H is lit or blinking, it indicates that the pressure in the armband 3 is equal to or higher than a predetermined pressure (for example, 320 mmHg or higher), and the medical staff By confirming the display area 8H, it is possible to prompt the user to stop the pressurizing operation.

  The selected mode display area 8K displays which mode is selected from the normal mode, the slow mode, and the auscultation mode by pressing the mode switch 10. By selecting this mode, the exhaust (decompression) speed can be changed. When the normal mode is selected, the exhaust speed is set to about 5 mmHg / sec, for example. In the normal mode, there is an advantage that the measurement time can be made relatively short because the exhaust speed is relatively fast. On the other hand, since the increment of the pressure change measurement is large, there is no particular problem when measuring a person with stable pulse, but when measuring the blood pressure of a person with arrhythmia, the pulse is easily lost. Measurement error may increase.

Therefore, a slow mode is provided. When this slow mode is selected, the exhaust speed is set to approximately half of the normal mode, for example, 2.0 to 2.5 mmHg / sec. In this manner, in the “slow” mode, the pressure change can be seen in detail by reducing the pressure more slowly than usual, so that the person with an arrhythmia that is likely to lose a pulse can be measured more accurately.
Further, the auscultation mode is a mode in which measurement is performed manually using a stethoscope. In this case, the exhaust speed is set to about half of the normal mode, for example, 2.0 to 3.0 mmHg / sec.

Next, an example of a control circuit block arranged in the sphygmomanometer body 2 of the sphygmomanometer 1 will be described with reference to FIG. FIG. 4 shows an example of a control circuit block arranged in the sphygmomanometer main body 2 and a configuration example of the armband 3.
A control unit 100 is disposed inside the housing 4 of the sphygmomanometer body 2 shown in FIG. 4, and the control unit 100 has a central processing unit (CPU) 101. The control unit 100 includes a display unit 8, a power control unit 102, a power switch 9, a mode switch 10, an exhaust switch 11, a pressure sensor 110, a ROM (read only memory) 111, and a RAM (random access memory). ) 112, the driving unit 113, and the buzzer 114.

  The power of the battery 115 shown in FIG. 4 is supplied to the control unit 100 by being controlled by the power control unit 102. The battery 115 may be a dry battery or a secondary battery (rechargeable battery), but preferably a medical worker performs a pressurizing operation of the air balloon 5 with one hand, so that power consumption during measurement is Is about 0.5 W, and as the power source to be used, for example, only one AA dry battery (DC1.5V) or AA rechargeable battery (DC1.5V) is used. Therefore, when a new AA battery (DC1.5V) is used, blood pressure can be measured about 1000 times, and the entire sphygmomanometer 1 can be reduced in size and weight (about 135 g). The display unit 8 displays the display items described with reference to FIG. The pressure sensor 110 detects the pressure in the air bag 20 for ischemia of the armband portion 3 and the pressure in the air bag 40 for detecting arterial pulsation, which will be described later. The pressure sensor 110 detects a change in pressure in the air bag 20 for ischemia. Moreover, the pressure in the air bag 40 for detecting arterial pulsation varies due to the vibration of the arterial wall due to the arterial pulsation of the upper arm T during blood pressure measurement, that is, due to the pulse wave of the artery of the upper arm T. This pressure fluctuation is detected. The air bag 20 for ischemia is also called a large cuff, and the air bag 40 for detecting arterial pulsation is also called a small cuff.

  The ROM 111 stores a control program and various data in advance. The RAM 112 temporarily stores calculation results and measurement results. The drive unit 113 drives the electromagnetic valve 116 according to a command from the control unit 100. When the armband portion 3 pressurizes the upper arm T, the fluctuation value of the pressure detected by the pressure sensor 110 is considerably larger than the fluctuation value of the pressure at the time of depressurization, which is the measurement time. For this reason, when the control unit 100 determines that the fluctuation value of the pressure detected by the pressure sensor 110 is greater than or equal to a predetermined value, the control unit 100 determines that the pressurization is currently being performed and instructs the drive unit 113 to The valve 116 is closed.

On the other hand, when the control unit 100 determines that the pressure fluctuation value (increase value) is substantially zero or in a reduced pressure state within a predetermined period with respect to the pressure detected by the pressure sensor 110, the control unit 100 instructs the drive unit 113. The electromagnetic valve 116 is opened so that the pressure reduction speed becomes a predetermined value. The operation of the sphygmomanometer 1 shifts from the pressurization mode to the measurement mode.
The forced exhaust valve 117 is opened by a command from the control unit 100 when the exhaust switch 11 is pressed. The buzzer 114 generates a predetermined warning sound according to a command from the control unit 100. For example, the buzzer 114 may cause an error when the blood pressure value is determined when the power switch 9 of the sphygmomanometer body 2 is pressed and the display unit 8 is ready for display, when the mode is switched by pressing the mode switch 10, A warning sound is generated when an error occurs.

  The forced exhaust valve 117 shown in FIG. 4 is disposed between the one end 6 </ b> B of the tube 6 and the conducting tube 120. The air supply bulb 5 is connected to one end portion 6B of the tube 6 through the manifold 118, the branching portion 119, the conducting tube 120, and the forced exhaust valve 117. The other end 6A of the tube 6 is connected to the air bag 20 for ischemia. In addition, the air supply balloon 5 is connected to the pressure sensor 110 via the manifold 118, the branch portion 119, the manifold 121, and the branch portion 122. The branch portion 122 is connected to one end portion 7 </ b> B of the tube 7. The other end 7A of the tube 7 is connected (communication) to an air bag 40 for detecting arterial pulsation. For this reason, the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation communicate with each other with equal internal pressure.

  Thereby, the pressure sensor 110 can detect the fluctuation | variation of the pressure in the air bag 20 for ischemia, and the fluctuation | variation of the pressure in the air bag 40 for arterial pulsation detection. When a medical worker grasps or separates the air balloon 5, the air enters the ischemic air bladder 20 through the manifold 118, the branch portion 119, the conducting tube 120, the forced exhaust valve 117, and the tube 6. While being able to send in, air can be sent into the air bag 40 for detecting arterial pulsation through the manifold 118, the branch part 119, the manifold 121, the branch part 122, and the tube 7.

Next, a structural example of the armband portion 3 shown in FIG. 1 will be described.
The arm band portion 3 is directly wound around the bare skin of the upper arm T of a patient (a person to be measured), and detailed structural examples are shown in FIGS.
FIG. 5 is a perspective view showing a state in which the armband portion 3 is about to be wound. FIG. 6A shows the inner surface side of the armband portion 3, and FIG. 6B is a perspective view showing the outer surface side of the armband portion 3. FIG. 7A is a plan view showing an outer surface side of the armband portion 3, and FIG. 7B is a blood-filling air bag 20 disposed inside the armband portion 3 and for detecting arterial pulsation. 4 is a plan view showing a shape example of an air bag 40. FIG.

As shown in FIGS. 5, 6, and 7 (A), the armband 3 includes a cuff cover 50, a blood cuff 20 for ischemia that is a large cuff, and an air bag 40 for detecting arterial pulsation that is a small cuff. have. The cuff cover 50 covers the ischemic air bladder 20 and the arterial pulsation detecting air bladder 40 by detachably storing them.
The cuff cover 50 includes an outer cloth 51 and an inner cloth 52, and the outer cloth 51 and the inner cloth 52 are rectangular. The end portion of the outer cloth 51 and the end portion of the inner cloth 52 are fixed by, for example, sewing with a thread. In the outer cloth 51 and the inner cloth 52, an air bag 20 for ischemia and arterial pulsation detection are provided. The air bag 40 can be detachably stored. Thereby, the cuff cover 50 can be removed from the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation, and can be replaced or disinfected.

  The outer cloth 51 and the inner cloth 52 of the cuff cover 50 shown in FIGS. 5, 6, and 7 (A) constitute a housing that covers the outer surface of the air bag for ischemia, and are not stretched in the circumferential direction and the longitudinal direction. It is a cloth member that is made of a flexible material and is deformable but has very low or almost no stretchability. Thereby, when the outer cloth 51 and the inner cloth 52 supply air into the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation, the air bag 20 for detecting ischemia and the air bag for detecting arterial pulsation are used. It is possible to prevent 40 from expanding outward in the radial direction of the armband portion 2. Therefore, the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation can apply pressure to the upper arm T side, which is the inner side in the radial direction. The pressure generated by the air bag 40 can be pressurized against the upper arm T without escaping to the outside of the armband portion 2, and accurate blood pressure measurement can be performed.

  As shown in FIG. 7A, the cuff cover 50 has an extraction opening 50P. The extraction opening 50P is a gap between the outer cloth 51 and the inner cloth 52, and is used to take out the ischemic air bag 20 and the arterial pulsation detecting air bag 40 housed in the cuff cover 50. On the contrary, it is provided to be inserted into the cuff cover 50. In order to easily take out the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation from the opening 50P into the cuff cover 50, or conversely, to insert into the cuff cover 50, a rectangular ischemic air bag. 20 has a trapezoidal extension 21. The trapezoidal extension portion 21 is located at a position corresponding to the opening portion 50P, and has an inclined portion 22 so that the extension portion 21 decreases in width toward the outside. As a result, when the medical staff grasps the extension portion 21 by hand, the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation are taken out through the opening portion 50P, or conversely, are inserted into the cuff cover 50. Can be done easily.

  Moreover, as shown in FIGS. 7A and 7B, the extended portion 21 is formed so that its position is slightly shifted from the center with respect to the longitudinal direction of the air bag 20 for ischemia. For this reason, when the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation are inserted into the cuff cover 50 from the opening portion 50P, they are prevented from being inserted in the opposite directions. That is, if the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation are inserted in the cuff cover 50 from the opening portion 50P in the correct direction, the extension portion 21 coincides with the position of the opening portion 50P. If inserted in the direction, the extension portion 21 does not coincide with the position of the opening portion 50P. From this, the medical staff can determine whether or not the blood bag 20 for ischemia and the air bag 40 for detecting arterial pulsation are inserted into the cuff cover 50 correctly.

As the arm band portion 3 shown in FIG. 7A, different sizes can be prepared in consideration of the dimensions of the patient's arm. The size of the armband part 3 is, for example, from small to large, SS size (applicable to upper arm circumference 13 to 20 cm), S size (applicable to upper arm circumference 17 to 26 cm), M size (upper arm circumference 24 to 32 cm), L size (applicable to upper arm circumference 32 to 42 cm), and LL size (applicable to upper arm circumference 42 to 50 cm). The armband portion 3 shown in FIG. 7A shows a length L1 and a width W1 in the horizontal direction, and examples of dimensions of each size are as follows.
For example, the lateral length L1 and width W1 of the cuff cover 50 of the SS-sized armband 3 are (345 ± 5 mm, 100 ± 4 mm), and the lateral length L2 and width W2 of the ischemic bladder 20 are (130). The lateral length L3 and the width W3 of the air bag 40 for detecting arterial pulsation are (30 ± 1 mm, 20 ± 1 mm).
For the S size cuff, for example, the lateral length L1 and width W1 of the cuff cover 50 of the armband portion 3 are (435 ± 5 mm, 130 ± 4 mm), and the lateral length L2 and width W2 of the air bag 20 for ischemia. (170 ± 10 mm, 110 ± 5 mm), the lateral length L3 and the width W3 of the air bag 40 for detecting arterial pulsation are (40 ± 1 mm, 25 ± 1 mm).
For the M size cuff, for example, the lateral length L1 and width W1 of the cuff cover 50 of the armband portion 3 are (520 ± 5 mm, 150 ± 4 mm), and the lateral length L2 and width W2 of the air bag 20 for ischemia. (240 ± 10 mm, 130 ± 5 mm), the lateral length L3 and width W3 of the air bag 40 for detecting arterial pulsation are (60 ± 1 mm, 30 ± 1 mm).
For the L size cuff, for example, the lateral length L1 and width W1 of the cuff cover 50 of the armband portion 3 are (640 ± 5 mm, 190 ± 4 mm), and the lateral length L2 and width W2 of the air bag 20 for ischemia. (320 ± 10 mm, 170 ± 5 mm), the lateral length L3 and width W3 of the air bag 40 for detecting arterial pulsation are (80 ± 1 mm, 40 ± 1 mm).
For the LL size cuff, for example, the lateral length L1 and width W1 of the cuff cover 50 of the armband portion 3 are (220 ± 4 mm, 830 ± 5 mm), and the lateral length L2 and width W2 of the air bag 20 for ischemia. (420 ± 10 mm, 200 ± 5 mm), the lateral length L3 and width W3 of the air bag 40 for detecting arterial pulsation are (100 ± 1 mm, 50 ± 1 mm).

Next, the structure of the cuff cover 50 of the armband portion 3 will be described with reference to FIGS. 5, 6, and 7 (A).
As shown in FIGS. 5, 6 </ b> B, and 7 </ b> A, the outer cloth 51 of the cuff cover 50 is provided with a female (loop) portion 53 of a hook-and-loop fastener. The female portion 53 of the surface fastener is a rectangular member, and is arranged from the start end portion 54 side of the outer cloth 51 to a substantially central position of the outer cloth 51. Two recognition marks 55 indicating the start end portion 54 are provided on the start end portion 54 side of the outer cloth 51. The two recognition marks 55 are triangular, for example. A ring-shaped recognition mark 56 is provided near the opening 50P of the outer cloth 51. This recognition mark 56 indicates a position where the artery of the patient's upper arm T shown in FIG. 1 is compressed. For this reason, as shown in FIG. 5, when the arm band portion 3 is wound around the upper arm T and fixed, the recognition mark 56 is positioned on the artery of the upper arm T. Thus, the air bag 40 for detecting arterial pulsation can be accurately positioned on the artery, and accurate blood pressure measurement can be performed.

On the other hand, as shown in FIGS. 5 and 6A, the inner cloth 52 of the cuff cover 50 is provided with a male portion 57 of a hook-and-loop fastener. As shown in FIG. 5, when the armband portion 3 is wound around and fixed to the upper arm T, the male (hook) portion 57 of the hook-and-loop fastener is attached to and detached from the female portion 53 of the hook-and-loop fastener described above. It is possible to fix the armband part 3 so that the armband part 3 does not shift with respect to the upper arm T by making the armband part 3 cylindrical by being pasted. The male portion 57 of the surface fastener is provided at a position closer to the end portion 58 side of the inner cloth 52. As shown in FIG. 6A, two arrow marks 59 are provided at the center position of the inner fabric 52. Two arrow marks 59 indicate that the armband portion 3 is a surface that is in direct contact with the upper arm T and the direction in which the armband portion 3 is wound.
As shown in FIGS. 5, 6, and 7 (A), a weight 60 is disposed inside the cuff cover 50 on the terminal end 58 side. The weight 60 is, for example, a metal rod-like member, and is fixed along the direction of the end portion 58 so that the end portion 58 of the cuff cover 50 is not sandwiched between the outer cloth 51 and the inner cloth 52 and moved. Has been. Since the air bag 20 for ischemia is not disposed in the end portion 58, the weight 60 can be easily accommodated in the end portion 58.
Since the weight 60 is thus arranged at the end portion 58 of the cuff cover 50, the weight of the weight 60 is used when the medical worker wraps and fixes the patient on the upper arm T as shown in FIG. The male portion 57 of the hook and loop fastener can be detachably attached to the female portion 53 of the hook and loop fastener described above. That is, when the medical staff finishes wrapping the armband part 3 around the patient's upper arm T, the weight of the weight 60 at the terminal part 58 of the armband part 3 is applied in the direction in which the arm band part 3 is wound. Can be easily wound. For this reason, the winding fixation work efficiency of the arm band part 3 of a medical worker can be raised.
In addition, since the weight 60 is disposed at the end portion 58 of the cuff cover 50, a protruding portion can be formed on the end portion 58 of the cuff cover 50, and a medical worker also serves as a handle for gripping the weight 60 with a finger. be able to. For this reason, since the medical worker can hold the terminal end 58 of the arm band part 3 with his / her hand, the terminal part 58 of the arm band part 3 is not detached from the hand. For this reason, the winding fixation work efficiency of the arm band part 3 of a medical worker can be raised.
Further, as shown in FIGS. 5, 6, and 7 (A), an anti-slip portion 61 is preferably attached and fixed to the start end portion 54 side of the inner cloth 52 of the cuff cover 50 by using, for example, an adhesive. ing. The anti-slip portion 61 is, for example, a belt-like thin member, and can be made of, for example, synthetic rubber, polyurethane, elastomer, or the like, which is a material that is difficult to slip by being in close contact with the upper arm T. The material of the anti-slip portion 61 is a material that exerts a high frictional force on the skin surface of the upper arm T and does not impose a burden on the skin surface of the upper arm T. When the non-slip portion 61 is arranged on the inner end side of the inner cloth 52 that is the inner surface side of the armband portion 3, the medical worker winds the armband portion 3 around the upper arm T of the patient. Further, it is possible to prevent the start end portion 54 of the armband portion 3 from slipping from the bare skin of the upper arm T, and to prevent the air bag 40 for detecting arterial pulsation from shifting from the artery of the upper arm T. For this reason, accurate blood pressure measurement can be performed.

The air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation shown in FIG. 7B are bag-like members formed of a flexible material. For example, the air bag 20 for ischemia is made of natural rubber, synthetic rubber, elastomer, or the like. The air bag 40 for detecting arterial pulsation is made of polyurethane or the like.
A hard plate 65 is disposed between the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation. By arranging the hard plate 65, a minute pressure fluctuation in the air bag 40 for detecting arterial pulsation can be detected without being affected by a large pressure fluctuation in the air bag 20 for ischemia. .

  As shown in FIG. 6, the extension portion 21 of the ischemic bladder 20 is connected to the other end 6 </ b> A of the tube 6, and the arterial pulsation detecting bladder 40 is connected to the other end 7 </ b> A of the tube 7. ing. Since the other end 7A of the tube 7 having a small diameter is loosened with respect to the other end 6A of the tube 6 having a large diameter, the air bag 20 for ischemia and arterial pulsation detection are detected through the opening 50P of the cuff cover 50. When the air bag 40 is taken out or the air bag 20 for detecting ischemia and the air bag 40 for detecting arterial pulsation are accommodated through the opening 50P of the cuff cover 50, the other end portion 7A of the tube 7 having a small diameter has a large diameter. This prevents the tube 6 from being damaged by being pulled by the other end 6A.

Next, a usage example of the above-described blood pressure monitor 1 will be described.
The medical staff wraps and fixes the armband 3 directly on the bare skin of the upper arm T of the patient shown in FIG. 1 as follows. FIG. 8 shows an example of a procedure for winding the armband portion 3 directly around the skin of the upper arm T of the patient.
As shown in FIG. 8A, the arm band portion 3 to be wound around the upper arm T has the outer cloth 51 side on the lower side and the inner cloth 52 on the upper side. First, FIG. 8 (A) to FIG. ), The inner cloth 52 side is applied from the lower side of the upper arm T. The medical worker holds the start end portion 54 of the armband portion 3 by hand and winds the armband portion 3 around the upper arm T along the R1 direction. At this time, the recognition mark 56 shown in FIGS. 5 and 6A is positioned in accordance with the position of the artery of the upper arm T as shown in FIG. 40 can be accurately positioned relative to the artery of the upper arm T.

  Then, as shown in FIG. 8C, the medical worker holds the end portion 58 of the armband portion 3 by hand and winds the armband portion 3 around the upper arm T along the R2 direction. The male part 57 of the surface fastener on the terminal end 58 side is detachably attached to the female part 53 of the surface fastener described above. Since the female part 53 of the hook-and-loop fastener and the male part 57 of the hook-and-loop fastener are detachably engaged with each other, the armband portion 3 can be directly wound around the skin of the upper arm T and fixed so as not to be displaced.

Next, a procedure in which the sphygmomanometer 1 measures the blood pressure of the patient's upper arm T will be described with reference to FIGS.
First, FIG. 9 will be referred to. FIG. 9 shows an example of a change in pressure in which the pressure applied to the upper arm T by the air bag 20 for ischemia changes with time in the sphygmomanometer 1 according to the embodiment of the present invention.
As shown in FIG. 1, the medical staff presses the power switch 9 shown in FIG. 3 and presses the mode switch 10 while the armband 3 is held in the correct posture with respect to the upper arm T. Select a mode. As shown in FIG. 2, by repeating the operation of holding and releasing the air balloon 5 while supporting the extension portion 14 with the finger of the hand H, the air from the air balloon 5 is exchanged with the piping in the sphygmomanometer body 2. Air is sent through the tubes 6 and 7 into the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation in the armband 3. As a result, the upper arm T of the patient is pressurized by the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation in the armband portion 3, resulting in an example of pressure change shown in FIG. 9. The pressure change example shown in FIG. 9 has a pressure increase period t1, a natural pressure reduction period t2, an optimum speed pressure reduction period t3, and a forced exhaust period t4.

Since air is sent into the air bag 20 for ischemia in the armband portion 3 and the air bag 40 for detecting arterial pulsation shown in FIG. 4, the air bag for ischemia in the armband portion 3 is shown in FIG. The pressure in 20 increases during the pressure increase period t1. In the pressure increase period t1, the CPU (central processing unit) 101 of the control unit 100 in FIG. 4 determines that the pressure is being applied based on the pressure detection signal PLS detected by the pressure sensor 110 in FIG. A command is issued to 113 and the electromagnetic valve 116 is closed. And the operation | movement which a medical worker grasps or separates the air balloon 5 is stopped, and pressurization is complete | finished.
Thus, the value of the maximum pressure PP applied to the upper arm T at the end of pressurization is a value obtained by adding an arbitrary overshoot pressurization amount to the patient's maximum blood pressure value, for example, a pressure higher by 30 mmHg to 40 mmHg. Value.

Since the air balloon 5, which is a rubber ball, is used, the pressure naturally decreases slightly during the natural decompression period t2 shown in FIG. 9, so the CPU 101 waits during the natural decompression period t2 (for example, a few seconds). To do.
After the natural decompression period t2, the CPU 101 enters an optimum speed decompression period t3 shown in FIG. In the optimum speed pressure reduction period t3 shown in FIG. 9, when the CPU 101 in FIG. 4 determines that the pressure reduction signal PLS detected by the pressure sensor 110 in FIG. The valve 116 is opened so that the decompression speed becomes an optimum decompression speed of a predetermined value.

As a result, the pressure in the air bag 20 for ischemia in the armband 3 is reduced at an optimal pressure reduction rate of a predetermined value. During this pressure reduction, the CPU 101 shown in FIG. From the maximum blood pressure value (SYS), the minimum blood pressure value (D1A), and the pulse value (pulse value) are acquired.
After that, during the forced exhaust period t4 shown in FIG. 9, the CPU 101 in FIG. 4 operates the forced exhaust valve 117, so that the air bag 20 for ischemia in the armband portion 3 and the air bag 40 for detecting arterial pulsation. The pressure is returned to atmospheric pressure by forcibly exhausting the air.

Reference is now made to FIG. FIG. 10 shows a graph example of a pressure fluctuation waveform VL generated when the air balloon 5 sends air when the arm band 3 shown in FIG. 4 is to pressurize the upper arm T. The vertical axis of the graph example shown in FIG. 10 is pressure, and the horizontal axis is time (msec).
The pressure fluctuation waveform VL shown in FIG. 10 is an enlarged view of a part AS extracted from the pressure fluctuation waveform VL in the pressure increase period t1 shown in FIG. The pressure fluctuation waveform VL has a pressure increase portion VL1 and a pressure decrease portion VL2, and repeats the pressure increase portion VL1 and the pressure decrease portion VL2.
A pressure increase portion VL1 of the pressure fluctuation waveform VL indicates a state where the air balloon 5 is grasped and air is supplied into the air bag 20 for detecting ischemia and the air bag 40 for detecting arterial pulsation. . In addition, the pressure drop portion VL2 of the pressure fluctuation waveform VL is in a state where the air balloon 5 is separated and the air is not supplied into the air bag 20 for detecting ischemia and the air bag 40 for detecting arterial pulsation. Is shown. The pressure drop portion VL2 of the pressure fluctuation waveform VL includes a pulse wave MN.

FIG. 11A shows only the pressure drop portion VL2 of the pressure fluctuation waveform VL shown in FIG. FIG. 11B shows a method in which the CPU 101 shown in FIG. 4 detects the pulse wave MN.
Specifically, the CPU 101 as the control unit reads a plurality of pressure drop portions VL2 from the pressure fluctuation waveform of FIG. 10, and compares one of the pressure drop portions VL2 with all the other pressure drop portions VL2. . That is, the pulse wave MN is detected and compared as shown in FIG. 11B by differentiating the value of each pressure drop portion VL2.
The acquisition of the pressure fluctuation waveform VL shown in FIG. 10, the cut-out process of only the pressure drop portion VL2 of the pressure fluctuation waveform VL shown in FIG. 11A, and the process of detecting the pulse wave MN shown in FIG. This is performed by the CPU 101 of the control unit 100 shown in FIG.
A pulse wave MN is included in the pressure drop portion VL2 of the pressure fluctuation waveform VL surrounded by a circle in FIG. In the part surrounded by a circle in FIG. 11B, a detection example of the generation of the pulse wave MN is shown, and thereafter, a detection example of the disappearance of the pulse wave MN is shown.

Next, referring to FIG. 12 and FIG. 13, when the medical worker presses the upper arm T by grasping or releasing the air balloon 5 shown in FIG. A procedure by which the CPU 101 of the control unit 100 shown in FIG. 4 determines that the applied pressure is appropriate and can teach the medical staff to stop pressurization will be described.
The conventional sphygmomanometer is designed such that the medical worker himself / herself determines the pressure at which the pressurization operation of the air balloon is stopped and stops the pressurization operation at that time. For this reason, when the blood pressure value of the patient who is the subject is high, insufficient pressurization to the upper arm occurs, and when the blood pressure value of the patient is low, overpressure may occur.

The sphygmomanometer 1 according to the embodiment of the present invention solves such a conventional problem and, as will be described below, shows that the pressure applied to the upper arm T by the armband portion 3 is appropriate. The CPU 101 of the control unit 100 shown in FIG. That is, when the upper arm T is being pressurized, the control unit 100 detects that at least one pulse wave MN is detected from the pressure detection signal PLS of the pressure sensor 110 and then pressurizes the armband unit 3 to obtain a predetermined applied pressure. Judgment is made and a command is given to the buzzer 114 to notify the pressurization stop instruction.
FIG. 12 shows a state in which the CPU 101 in FIG. 4 has one pulse wave while the pressure rises during the pressure rise period t1 by pressurizing the air balloon 5 shown in FIG. 4 in the first embodiment of the present invention. An example in which only the MN is detected is shown. In FIG. 13, when only one pulse wave MN can be detected as shown in FIG. 12, the CPU 101 determines that the pressure applied to the upper arm T is sufficient by the armband portion 3 and notifies the pressurization stop. It is a flowchart which shows a procedure. In the flowchart of FIG. 13, it has step ST1 to step ST6.

In FIG. 12, a rectangular section indicated by a two-dot chain line is a cutting section GG8 from the cutting section GG1 set a plurality of times so that the CPU 101 in FIG. 4 cuts out a pulse wave during the pressure increase period t1. These cut-out section GG1 to cut-out section GG8 are set corresponding to the pressure drop portion VL2 of the pressure fluctuation waveform VL during the pressure rise period t1.
In step ST1 of FIG. 13, the CPU 101 of FIG. 4 performs preprocessing of the pressure fluctuation waveform VL during pressurization shown in FIG. That is, as shown in FIG. 11A, only the pressure drop portion VL2 is cut out from the pressure fluctuation waveform VL. Then, in step ST2 of FIG. 13, as shown in FIG. 11B, the CPU 101 shown in FIG. 4 detects the pulse wave based on each pressure drop portion VL2 in order to detect the pulse wave MN. Compared with the pulse wave based on the part VL2, the pulse wave MN having a spike shape shown by a circle in FIG. 11B is found. In the next pressure drop portion VL2, the pulse wave MN disappears as indicated by a circle.

In this case, as shown in FIG. 12, the CPU 101 of FIG. 4 detects a pulse wave from the pressure drop portion VL2 during the pressure rise period t1 and cuts out a plurality of cutouts corresponding to the pressure drop portion VL2. Sections GG1 to GG8 are set.
In step ST3 in FIG. 13, in the cutout sections GG1 to GG5, the CPU 101 in FIG. 4 does not detect the pulse wave MN from the pressure drop portion VL2 of the pressure detection signal PLS of the pressure sensor 110, but reaches the cutout section GG6. Then, the CPU 101 detects one pulse wave MN from the pressure drop portion VL2. In step ST4 of FIG. 13, the CPU 101 cannot detect the pulse wave MN again in the next cutout section GG7 from the pressure drop portion VL2. Therefore, the CPU 101 in FIG. 4 can confirm that the pulse wave MN has disappeared in the pressure drop portion VL2 in the cut-out section GG7.

As described above, the CPU 101 can detect only one pulse wave MN in the cut-out section GG6 during pressurization by the pressure detection signal PLS from the pressure sensor 110 in FIG. 4, and the CPU 101 obtains one pulse wave MN. Make sure that
Then, in step ST5 of FIG. 13, when the CPU 101 reaches a certain pressure or after a certain time has elapsed, specifically, when the CPU 101 reaches the next segment GG8 of the segment GG7 shown in FIG. In step ST6 of 13, the CPU 101 activates the buzzer 114 shown in FIG. 4 to generate a buzzer sound.
Thereby, since CPU101 of the control part 100 can alert | report that a medical worker will stop a pressurization with a buzzer sound, a medical worker can reliably pressurize the air supply balloon 5 shown in FIG. Can be stopped. In addition to the buzzer sound or instead of the buzzer sound, the CPU 101 visually informs the medical staff by displaying “stopping pressurization” on the display unit 8 shown in FIG. 4. You can also.

  Thus, in the embodiment of the present invention shown in FIGS. 12 and 13, the arm band 3 shown in FIG. 1 pressurizes the patient's upper arm T, and the CPU 101 shown in FIG. If the pulse wave MN disappears immediately after the detection, the CPU 101 has reached the extent that the highest pressure PP applied to the upper arm T of the armband 3 is 30 mmHg to 40 mmHg. Therefore, it is judged that it is sufficient for blood pressure measurement. Based on the determination of the CPU 101, the CPU 101 can notify and prompt the medical worker to stop the pressurization operation of the air balloon 5 by notifying the pressurization stop. The operation can be stopped reliably. For this reason, blood pressure measurement time can be shortened and an extra burden is not given to the patient.

(Second embodiment of the present invention)
Next, a second embodiment of the present invention will be described.
FIG. 14 shows that the CPU 101 in FIG. 4 starts from the pressure drop portion VL2, for example, a plurality of pulse waves MN1 to MN5 while the pressure rises during the pressure rise period t1 by pressurizing the air balloon 5 shown in FIG. An example of detecting is shown. 15 confirms the pulse wave MN2 having the maximum amplitude among the plurality of pulse waves detected as shown in FIG. 14, and the amplitude of the pulse wave MN4 after the pulse wave MN2 having the maximum amplitude is a predetermined threshold THE. It is a flowchart which shows the procedure which CPU101 judges that the pressurization with respect to the upper arm T is enough by the arm band part 3 when it was the following, and alert | reports a pressurization stop instruction | indication. In the flowchart of FIG. 15, it has step ST10 to step ST16.

In FIG. 14, rectangular sections indicated by two-dot chain lines are cut-out sections GG11 to GG18 that are set a plurality of times for the CPU 101 in FIG. 4 to cut out a pulse wave during the pressure increase period t1. The cut-out sections GG11 to GG18 are set in correspondence with the pressure decrease portion VL2 of the pressure fluctuation waveform VL during the pressure increase period t1.
In step ST10 of FIG. 15, the CPU 101 of FIG. 4 performs preprocessing of the pressure fluctuation waveform VL during pressurization shown in FIG. That is, as shown in FIG. 11A, only the pressure drop portion VL2 is cut out from the pressure fluctuation waveform VL. Then, in step ST11 of FIG. 15, as shown in FIG. 11B, the CPU 101 shown in FIG. 4 detects the average value of the value of the pressure drop portion VL2 and the value of the pressure drop portion VL2 in order to detect the pulse wave. The pulse waves MN1 to MN5 are detected by taking the difference between them.

In this case, as shown in FIG. 14, the CPU 101 in FIG. 4 sets a plurality of cut-out sections GG11 to GG18 in order to cut out the pulse wave from the pressure drop portion VL2 during the pressure rise period t1.
In step ST12 of FIG. 15, in the cut-out sections GG11 to GG13, the CPU 101 does not detect the pulse wave MN from the pressure drop portion VL2 of the pressure detection signal PLS of the pressure sensor 110 of FIG. However, when the cut section GG14 is reached, the CPU 101 detects the pulse wave MN1 from the pressure drop portion VL2, and in the cut section GG15, the CPU 101 detects the pulse wave MN2 from the pressure drop portion VL2, and in the cut section GG16, the CPU 101 Detects the pulse wave MN3 from the pressure drop portion VL2, and in the cutout section GG17, the CPU 101 detects the pulse wave MN4 from the pressure drop portion VL2, and in the cutout section GG18, the CPU 101 detects the pulse wave from the pressure drop portion VL2. MN5 is detected.

In step ST13 in FIG. 15, the CPU 101 in FIG. 4 confirms the pulse wave having the maximum amplitude (also referred to as the maximum pulse wave level (mmHg)) from the detected plurality of pulse waves MN1 to MN5. In the example of FIG. 14, the CPU 101 of FIG. 4 confirms that the amplitude of the pulse wave MN2 is the maximum amplitude (maximum pulse wave level mmHg).
In step ST14 of FIG. 15, the CPU 101 confirms the appearance of a pulse wave MN4 having an amplitude equal to or smaller than the threshold THE among the pulse waves MN3, MN4, and MN5 generated after the pulse wave MN2 having the maximum amplitude is generated. The value of the threshold THE is a predetermined pulse wave amplitude threshold value. The value of the threshold THE is determined by, for example, threshold THE = maximum amplitude of pulse wave × 30%.

  As a result, in step ST15 in FIG. 15, the CPU 101 confirms the appearance of the pulse wave MN4 having an amplitude equal to or smaller than the threshold THE, and then, after the pressing force reaches a certain pressure or after a certain time has elapsed, When the next cut-out section GG18 shown in FIG. 14 is reached, in step ST16 of FIG. 15, the CPU 101 activates the buzzer 114 shown in FIG. 4 to generate a buzzer sound. Thereby, the medical worker can reliably stop the pressurizing operation of the air balloon 5 by informing and teaching the medical worker that the pressurization is stopped. In addition to the buzzer sound or instead of the buzzer sound, the CPU 101 visually informs the medical staff by displaying “stopping pressurization” on the display unit 8 shown in FIG. 4. You can also.

  As described above, in the second embodiment of the present invention shown in FIGS. 14 and 15, a plurality of CPUs 101 of the control unit 100 shown in FIG. 4 are provided while the armband 3 shown in FIG. The pulse waves MN1 to MN5 can be detected. At this time, after detecting the pulse wave MN2 having the maximum amplitude, the amplitude of the pulse wave becomes smaller like the pulse waves MN3, MN4, and MN5. The CPU 101 determines that the pressure applied to the upper arm T of the armband part 3 has reached a level obtained by adding 30 mmHg to 40 mmHg to the maximum blood pressure value, and is sufficient for blood pressure measurement. Based on the determination of the CPU 101, the CPU 101 can notify and prompt the medical worker to stop the pressurizing operation of the air balloon 5 by notifying the pressurization stop instruction. Manual operation can be stopped reliably. For this reason, blood pressure measurement time can be shortened and an extra burden is not given to the patient.

  The sphygmomanometer 1 according to the embodiment of the present invention is disposed in the armband portion 3 of FIG. 4 when measuring the blood pressure by attaching the armband portion 3 of FIG. 1 to the patient's upper arm T and applying pressure. Air bags 20 and 40 that pressurize the upper arm T by supplying air, a pressure sensor 110 that detects the pressure in the air bag, a buzzer 114 that is an example of a notification unit, and a pressure while the upper arm T is being pressurized After detecting at least one pulse wave MN (MN1 to MN5) from the pressure detection signal PLS of the sensor 110, it is determined that a predetermined pressurizing force has been obtained by pressurizing the armband portion 3, and a command is given to the buzzer 114 to apply it. It has the control part 100 which alert | reports a pressure stop instruction | indication.

  Therefore, it is possible to determine that the pressure applied to the upper arm T is appropriate and issue a pressurization stop instruction. When the control unit 100 detects at least one pulse wave MN from the pressure detection signal from the pressure sensor 110, the control unit 100 determines that a predetermined pressurizing force is obtained by pressurization of the armband unit 3, and the buzzer of FIG. Since the pressurization stop instruction is notified by giving a command to 114, the medical staff can surely know the timing to stop pressurization by the pressurization stop instruction from the buzzer 114. Accordingly, it is possible to prevent the occurrence of insufficient pressurization, and it is not necessary for the medical worker to perform the pressurization operation with the air balloon again to perform the blood pressure measurement again, so that the blood pressure measurement time can be shortened. In addition, since there is no overpressurization, no numbness occurs in the upper arm T of the patient, so that no extra burden is given to the patient.

  As shown in FIGS. 12 and 13, the CPU 101 of the control unit 100 detects one pulse wave MN while the upper arm T is being pressurized, and if no new pulse wave can be detected thereafter, the armband unit It is determined that a predetermined pressurizing force is obtained by the pressurization of 3, and a pressurization stop instruction is notified by the buzzer 124 which is a notification unit. Therefore, if the control unit 100 detects one pulse wave MN while pressurizing the upper arm T and cannot detect a new pulse wave thereafter, the control unit 100 obtains a predetermined pressurizing force by pressurizing the armband unit 3. Therefore, it is possible to easily notify the medical staff of the pressurization stop instruction.

  As shown in FIGS. 14 and 15, the CPU 101 of the control unit 100 detects the plurality of pulse waves MN1 to MN5 while pressurizing the upper arm T, and detects the pulse having the maximum amplitude from the plurality of pulse waves MN1 to MN5. The wave MN2 is confirmed, and when the amplitude of the pulse wave MN4 after the confirmed pulse wave MN2 having the maximum amplitude is less than or equal to a predetermined pulse wave amplitude threshold (threshold THE), a predetermined pressure is obtained. The buzzer 114 notifies the pressure stop instruction. For this reason, when the amplitude of the pulse wave becomes equal to or less than a predetermined pulse wave amplitude threshold while the upper arm T is being pressurized, the control unit 100 determines that a predetermined pressurizing force has been obtained and A person can easily be notified of a pressurization stop instruction.

  The CPU 101 of the control unit 100 provides a plurality of cut-out sections GG1 to GG8 (or GG11 to GG18) for the pressure drop portion VL2 of the pressure fluctuation waveform VL generated while pressurizing the upper arm T, and the pulse wave in the cut-out section is provided. The pulse wave is detected by checking the presence or absence. For this reason, the pulse wave which generate | occur | produces in the pressure fall part VL2 of the pressure fluctuation waveform VL can be reliably detected in the cut-out section.

  The air bag of the armband part 3 includes an air bag 20 for blocking the upper arm by supplying air, and an air bag for detecting arterial pulsation that detects the pulsation of the artery of the upper arm T by supplying air. 40, and the air bag 20 for ischemia and the air bag 40 for detecting arterial pulsation are accommodated by an armband cover 50. For this reason, the air bag 40 for detecting arterial pulsation can be wound while being positioned easily according to the artery of the upper arm T. For this reason, accurate blood pressure measurement can be performed.

  The blood pressure monitor main body 2 is connected to the air bag 20 for ischemia of the armband 3 and the air bladder 40 for detecting arterial pulsation using the tubes 6 and 7. It has a body 4 and an air balloon 5 that is attached to the housing and pushed to send air to the blood-insufficating air bag 20 and the arterial pulsation air bag 40 through the tubes 6 and 7. For this reason, while a medical worker holds an air balloon with one hand, the medical worker can wrap the armband part with the other hand only while easily positioning the armband part on the upper arm. Can be improved.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims.
The illustrated sphygmomanometer is of a manual pressurization type, but the sphygmomanometer of the present invention is not limited to this. The automatic sphygmomanometer has an arm band part and a blood pressure monitor main body part separate from the arm band part, and the arm band part is wound around the upper arm of a patient (a person to be measured). When the pump in the sphygmomanometer main body is driven, air can be sent from the sphygmomanometer main body through the tube to the air bag for ischemia and the air bag for detecting arterial pulsation.
Further, the notification unit is not limited to the buzzer 114 shown in FIG. In place of or in addition to the buzzer 114, a speaker SSP as a notification unit is provided as shown in FIG. 4, and a pressurization stop instruction is notified by voice using the speaker SSP according to a command from the CPU 101 of the control unit 100. You may do it.
A part of each configuration of the above embodiment can be omitted, or can be arbitrarily combined so as to be different from the above.

  DESCRIPTION OF SYMBOLS 1 ... Blood pressure monitor, 3 ... Armband part, 2 ... Blood pressure monitor main-body part, 4 ... Housing | casing, 5 ... Air balloon, 6, 7 ... Tube, 8 ... Display part 20 ... Air bag for ischemia, 40 ... Air bag for arterial pulsation detection, 50 ... Cuff cover (armband part cover), 100 ... Control part, 101 ... CPU, 110 ... Pressure sensor, 114 ... Buzzer (an example of a notification unit), T ... Upper arm, PLS ... Pressure detection signal, t1 ... Pressure increase period, t2 ... Natural decompression period, t3・ ・ ・ Optimal speed decompression period, t4 ・ ・ ・ Forced exhaust period, VL ・ ・ ・ Pressure fluctuation waveform, VL1 ・ ・ ・ Pressure rise portion of pressure fluctuation waveform VL, VL2 ・ ・ ・ Pressure fall portion of pressure fluctuation waveform VL, GG1 to GG8, GG11 to GG18 ... pulse wave segment, MN, MN1 to MN5 ... pulse wave THE ··· predetermined pulse wave amplitude of Suresh (predetermined pulse wave amplitude threshold)

Claims (6)

A sphygmomanometer that measures blood pressure by attaching an armband to an upper arm of a person to be measured and manually pressurizing a balloon.
An air bag for ischemia that is disposed in the armband portion and is used to insulate the upper arm by being supplied with air from the air balloon.
An air bag for detecting arterial pulsation, which is disposed in the armband and supplied with the air from the air balloon;
A pressure sensor for detecting the pressure in the air bag for ischemia and the pressure in the air bag for detecting arterial pulsation;
A notification unit;
Detecting at least one pulse wave from a pressure detection signal of the pressure sensor from the air bag for detecting arterial pulsation during pressurization to the air bag for detecting arterial pulsation and the air bag for detecting arterial pulsation A control unit configured to determine that a predetermined pressurizing force has been obtained by pressurization of the armband unit, and to issue a command to the notification unit to notify a pressurization stop instruction. Total.   The controller controls one pulse from a pressure detection signal of the pressure sensor from the air bag for detecting arterial pulsation during pressurization to the air bag for detecting ischemia and the air bag for detecting arterial pulsation. If a new pulse wave cannot be detected after the wave is detected, it is determined that the predetermined pressure is obtained by pressurizing the armband, and the pressurization stop instruction is notified by the notification unit. The sphygmomanometer according to claim 1, wherein:   The controller is configured to apply a plurality of pulses from a pressure detection signal of the pressure sensor from the air bag for detecting arterial pulsation during pressurization to the air bag for detecting ischemia and the air bag for detecting arterial pulsation. The pulse wave having the maximum amplitude is confirmed from a plurality of the pulse waves by detecting a wave, and the amplitude of the pulse wave after the confirmed pulse wave having the maximum amplitude is equal to or less than a predetermined pulse wave amplitude threshold value. 2. The sphygmomanometer according to claim 1, wherein, when it is determined that the predetermined pressurizing force has been obtained, the notifying unit is notified of a pressurization stop instruction.   The control unit provides a plurality of cut-out sections for a pressure drop portion of a pressure fluctuation waveform generated during pressurization to the air bag for ischemia and the air bag for detecting arterial pulsation, The sphygmomanometer according to claim 1, wherein the pulse wave is detected by confirming the presence or absence of the pulse wave.   The sphygmomanometer according to any one of claims 1 to 4, wherein the air bag for ischemia and the air bag for detecting arterial pulsation in the arm band part are accommodated by an arm band part cover.   The sphygmomanometer body has a sphygmomanometer body connected to the air bag for ischemia of the armband and the air bag for detection of arterial pulsation using a tube. The blood pressure according to claim 5, further comprising: a balloon that is attached to a housing and pushes the air through the tube to send the air to the ischemic bladder and the arterial pulsation detecting bladder. Total.

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