JP2006334153A - Sphygmomanometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sphygmomanometer which can prevent an influence of arterial pulsation and measure blood pressure accurately. <P>SOLUTION: A sphygmomanometer 1 comprises a cuff 2 to be worn on an upper arm A, and a pressure sensor to sense air pressure when air is provided into the cuff 2. The cuff 2 includes a measurement cuff 8 to block an artery when air is provided, a pressure cuff 7 made of two space sections on both the sides of the measurement cuff 8, and a plate member 13 at which a pair of ribs 13A abuts on a seal section S which is a border section between the pressure cuff 7 and the measurement cuff 8, and an auxiliary cuff 9 which pressurizes the ribs 13A of the plate member 13 to the artery when inflated. Even if the arterial pulsations are transmitted to the pressure cuff 7, the pulsations can be prevented from being transmitted from the pressure cuff 7 to the measurement cuff 8 because there the seal section S exists. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a blood pressure measurement device, and more particularly to an improvement in an oscillometric blood pressure measurement device.

Conventionally, as an oscillometric blood pressure measurement device, it is equipped with a cuff band that is attached to an arm or a foot and expands when blood is supplied to block blood vessels, and a pressure sensor that detects air pressure in the cuff band, The cuff band is inflated when air is supplied and presses the blood vessel for ischemia, and is expanded when air is supplied to press the blood vessel for ischemia and the pressure sensor is used for air pressure. And a measurement cuff for detecting the blood pressure, and the blood pressure is measured based on the detection result of the air pressure by the pressure sensor.
In such a conventional blood pressure measuring device, the cuff band is first attached to the upper arm, and then the cuff band is inflated by supplying air from the pump to the cuff band. In this way, the cuff belt is inflated by air, so that the artery of the upper arm is blocked (is blood-blocked). Thereafter, when the pressure of the air in the cuff is gradually decreased by gradually discharging the air in the cuff zone, blood flows through the artery that has been blocked until then. Then, the blood pressure is measured based on the fluctuation of the pulse wave amplitude of the artery at the location where the cuff band is subsequently attached.
JP 63-150051 A JP 2000-79101 A Japanese Patent Laid-Open No. 2004-121806 JP 2004-254717 A

By the way, in the conventional general blood pressure measuring device, since both pressurization and measurement are performed with a single cuff belt, for example, when a blood pressure is measured with a cuff belt attached to the lower limb, from the cuff center to the upstream thereof. Since the blood cannot be blocked over the portion, the pulsation on the upstream side of the cuff band is transmitted to the cuff band, and accurate blood pressure measurement cannot be performed.
Therefore, in order to prevent the influence of such pulsation, a cuff band blood pressure measuring device in which a pressurizing cuff and a measurement cuff are configured by separate bags has been proposed (for example, Patent Documents 1 to 4).
However, even in such a conventional blood pressure measurement device, the following problems have been pointed out.
That is, in the blood pressure measurement device disclosed in Patent Document 1, for example, when the cuff band is worn on the foot, the pressure distribution in the pressing area by the cuff band is not uniform, and accurate blood pressure measurement is difficult.
Moreover, in the blood pressure measurement device of Patent Document 2, a buffer material is disposed to prevent the influence of pulsation from the pressure cuff to the pressure sensor, but the influence of the pulsation on the measurement cuff is completely prevented. There was a disadvantage that it was not possible.
Further, in the blood pressure measurement device of Patent Document 3, it is not possible to exclude that the upstream pulsation is transmitted to the pressurization cuff and further propagates to the measurement cuff and has an influence, and from the pressure detected by the pressure sensor. Since it is necessary to perform a calculation that eliminates the influence of pulsation, such a calculation process is complicated.
Furthermore, in the blood pressure measurement device of Patent Document 4, since the pressure cuff and the measurement cuff communicate with each other, pulsation is transmitted to the measurement cuff via the pressure cuff, and accurate blood pressure measurement is difficult. .

In view of the circumstances described above, the present invention includes a cuff band that expands to block blood vessels when air is supplied to an arm or a leg, and a pressure sensor that detects air pressure in the cuff band. The cuff belt expands when air is supplied and compresses the blood vessel to block the blood. The cuff band expands when air is supplied and presses the blood vessel to block the blood pressure. In a blood pressure measurement device comprising a measurement cuff to be detected and measuring blood pressure based on the detection result of air pressure by the pressure sensor,
A plate-like member is provided so as to cover the measurement cuff from above, and has a rib contacting the boundary between the pressure cuff and the measurement cuff. The plate-like member expands when supplied with air. An auxiliary cuff for pressing the rib of the member toward the blood vessel is provided.

According to such a configuration, the rib of the plate-shaped member is located at the boundary between the pressure cuff and the measurement cuff, and the rib of the plate-shaped member is directed toward the blood vessel by the expansion of the auxiliary cuff. It comes to be pressed. Therefore, even if the upstream pulsation is transmitted to the pressure cuff, the pulsation can be prevented from being transmitted from the pressure cuff to the measurement cuff. In addition, the boundary between the two cuffs is pressed by the ribs, and the expanded measurement cuff is brought into contact with the plate-like member, whereby the pressure distribution when pressed by the cuff belt can be made uniform.
Therefore, it is possible to provide a blood pressure measurement device that can accurately measure blood pressure while preventing the influence of pulsation.

The present invention will be described below with reference to the illustrated embodiments. In FIGS. 1 and 2, reference numeral 1 denotes a blood pressure measuring device for measuring blood pressure. The blood pressure measurement device 1 according to the present embodiment includes a cuff band 2 as a wearing means to be worn on the upper arm or an ankle, a pump 4 for supplying air to the cuff band 2 through a conduit 3 when necessary, and the pump 4 And a control device 6 for controlling the operation of the electromagnetic on-off valve 5 provided in the conduit 3.
As will be described in detail later, when the blood pressure is measured by the blood pressure measurement device 1, first, the cuff band 2 before being inflated is wound around the upper arm A and attached, and then the conduit 3 is connected from the pump 4 to the blood pressure. Then, air is fed into the pressure cuff 7, the measurement cuff 8 and the auxiliary cuff 9 of the cuff belt 2 (see FIG. 2). As a result, the cuffs 7 to 9 of the cuff belt 2 are inflated and the artery of the upper arm A is compressed and occluded (is blocked).
Since the air of each cuff 7-9 of the cuff belt 2 is gradually exhausted from this state, the air pressure in each cuff 7-9 of the cuff belt 2 gradually decreases. Along with this, the artery of the forearm A that has been occluded by the two cuffs 7 and 8 is released by the blood pressure and blood begins to circulate in the artery, and the fluctuation of the pulse wave amplitude in the artery is accompanied by a pressure sensor. 10, based on the detection result by the pressure sensor 10, the control device 6 calculates the maximum blood pressure, the average blood pressure, and the minimum blood pressure, and displays them on the display unit 6 </ b> A. It is like that.
The blood pressure measurement technique by the blood pressure measurement device 1 of this embodiment is the same as that of a conventionally known oscillometric blood pressure measurement device.

Therefore, in this embodiment, the cuff band 2 as the wearing means and the related portion are improved as follows, so that the influence on the blood pressure measurement due to the upstream pulsation can be prevented and accurate blood pressure measurement can be performed. It is what I did.
That is, as shown in FIGS. 2 to 3, the cuff band 2 of the present embodiment is formed in a flat fan-shaped bag shape, and a main body portion 11 formed by adjoining a pressure cuff 7 and a measurement cuff 8. The flexible plate-like members 12 to 14 arranged so as to be superposed on the upper surfaces of the cuffs 7 and 8 in the main body 11 and the plate-like member 13 covering the measurement cuff 8 are arranged so as to be superposed. An auxiliary portion 16 having a bag-like auxiliary cuff 9 and a plate-like member 15 superposed on the bag-like auxiliary cuff 9, and a flat bag-like shape provided to cover the main body portion 11, the plate-like members 12 to 14 and the auxiliary portion 16. Cover 17.
Although not shown, a set of detachable Velcro (registered trademark) is attached to a required portion of the cover 17, and the cover 17 is provided on the cover 17 when the cuff band 2 is wound around the upper arm A of the person and attached. By combining a pair of magic tapes (registered trademark), the mounting state of the cuff belt 2 on the upper arm A can be maintained.

In this embodiment, a flat bag sealed with polyvinyl chloride or a polyurethane sheet is prepared, and the main body 11 is constituted by the bag. Further, as shown in FIGS. The required space of 11 is sealed in a continuous frame shape, and the internal space is divided to form the pressure cuff 7 and the measurement cuff 8.
More specifically, the inner space of the frame-shaped seal portion S is used as the measurement cuff 8 by sealing the region on the center side in the width direction of the bag serving as the main body portion 11 into an elongated frame shape. In addition, along with the formation of the measurement cuff 8 in this way, a pair of space portions 11A and 11B are formed at positions adjacent to each other along the longitudinal direction of the measurement cuff 8. In the present embodiment, these mutual spaces 11A and 11B are formed. A pressurizing cuff 7 is constituted by a pair of space portions 11A and 11B communicating with each other.
As described above, in the present embodiment, the pressure cuff 7 and the measurement cuff 8 are formed by dividing the internal space of the main body portion 11 formed of a bag as an integral body by the frame-shaped seal portion S. And the measurement cuff 8 is arrange | positioned so that it may be pinched | interposed by the pressure cuff 7 which consists of a pair of space part 11A, 11B of the both adjacent positions.
An introduction port 8A is provided on the upper surface at the center in the longitudinal direction of the measurement cuff 8, and a first branch pipe 18 branched from the conduit 3 is connected to the introduction port 8A (see FIG. 1). An introduction port 7A is also formed on the upper surface of the pressure cuff 7 on the space 11B side, and a second branch pipe 19 branched from the conduit 3 is connected to the introduction port 7A.
The measurement cuff 8 is inflated by introducing air from the pump 4 to the measurement cuff 8 via the conduit 3 and the first branch pipe 18, and via the conduit 3 and the second branch pipe 19. By introducing air from the pump 4 to the pressurization cuff 7, the pressurization cuff 7 composed of both space portions 11A and 11B is expanded.

The cuff band 2 of the present embodiment is such that when the cuff band 2 is wound around the upper arm A and attached, the longitudinal direction of both cuffs 7 and 8 is substantially orthogonal to the blood flow direction in the artery of the upper arm A. It has become. Further, the space portion 11A having a larger volume in the pressure cuff 7 is positioned upstream of the measurement cuff 8 in the artery, and the space portion 11B in the direction in which the volume of the pressure cuff 7 is smaller is located downstream of the measurement cuff 8. The cuff belt 2 is placed on the upper arm A of the human body (see FIGS. 2 and 4).
Thus, in this embodiment, the pressure cuff 7 is disposed on the upstream and downstream sides of the measurement cuff 8 and the measurement cuff 8 measures the blood pressure when measuring the blood pressure. The cuff 8 can be prevented from being affected by the pulsation of the upstream artery. In the present embodiment, the pressure cuff 7 is constituted by the space portions 11A, 11B communicating with each other, but the downstream space portion 11B may be omitted.

Further, as shown in FIG. 1, the first branch pipe 18 is provided with an electromagnetic on-off valve 5 whose operation is controlled by the control device 6, and the first on the downstream side of the electromagnetic on-off valve 5. A constant speed exhaust valve 21 is provided in the branch pipe 18, and the pressure sensor 10 is provided in the first branch pipe 18 at a position downstream of the position and close to the measurement cuff 8.
When the pump 4 is operated by the control device 6 with the electromagnetic on-off valve 5 opened, air can be supplied from the pump 4 to the measurement cuff 8 through the conduit 3 and the first branch pipe 18, thereby the measurement cuff. 8 is increased in pressure to a required air pressure and expanded. Further, the air pressure in the measurement cuff 8 at that time is detected by the pressure sensor 10 provided in the first branch pipe 18 and transmitted to the signal amplifier 6B of the control device 6.
After that, the control device 6 closes the electromagnetic on-off valve 5 to stop the supply of air from the pump 4 to the measurement cuff 8. By operating, the air in the measurement cuff 8 is exhausted at a required constant speed via the first branch pipe 18 and the constant speed exhaust valve 21. The air pressure of the measurement cuff 8 at that time is detected by the pressure sensor 10 and input to the signal amplifier 6B of the control device 6. The pressure detection signal input to the signal amplifier 6B is converted into a digital signal by the A / D converter 6C and then transmitted to the arithmetic unit 6D. Then, the exhaust valve control unit 6E of the control device 6 controls the operation of the constant speed exhaust valve 21 based on the pressure signal in the measurement cuff 8 transmitted to the calculation unit 6D to obtain a required constant speed (for example, The air is exhausted from the measurement cuff 8 through the constant speed exhaust valve 21 at 2 to 3 mmHg / S).

A pressure sensor 22 is provided in the middle of the conduit 3 on the upstream side of the connection position of the first branch pipe 18, and the constant speed exhaust valve 23 and the quick exhaust are provided in the middle of the conduit 3 on the upstream side of the pressure sensor 22. A valve 24 is provided.
The conduit 3 is communicated with the auxiliary cuff 9 through a third branch pipe 25 branched therefrom. That is, the auxiliary cuff 9 and the pressure cuff 7 communicate with each other through the conduit 3 and both branch pipes 19 and 25.
Therefore, when the control device 6 operates the pump 6 as described above, air is also fed into the pressure cuff 7 and the auxiliary cuff 9 through the conduit 3 and both branch pipes 19 and 25, and both the cuffs 7 and 7 are supplied. , 9 are inflated. The air pressure in the cuffs 7 and 9 at that time is detected by the pressure sensor 22 and input to the signal amplifier 6B of the control device 6. The pressure signal input from the pressure sensor 22 to the signal amplifier 6B is converted into a digital signal by the A / D converter 6C and then transmitted to the arithmetic unit 6D.
When the control device 6 confirms that the air pressures of the cuffs 7 and 9 detected by the pressure sensor 22 have increased to the required pressure, the control device 6 stops the operation of the pump 4 and controls the operation of the constant speed exhaust valve 23. The air in the cuffs 7 and 9 is exhausted at a required constant speed through the branch pipes 19 and 25, the conduit 3, and the constant speed exhaust valve 23. After that, the control device 6 opens the quick exhaust valve 24 when necessary, and quickly discharges the air in both the cuffs 7 and 9 through the quick exhaust valve 24.

In the present embodiment, as described above, air is supplied to the cuffs 7 to 9 of the main body portion 11 and the auxiliary portion 16 to inflate them. In this embodiment, the cuff belt 2 is attached to the upper arm. In order to make it easy to attach the cuff band 2 when being attached to A, the plate-like members 12 and 14 are arranged at locations on the upper surfaces of both the space portions 11A and 11B (see FIGS. 2 and 3). ). Both plate-like members 12 and 14 are formed in a shape obtained by rounding a flat plate having the same thickness over the entire area, and the size of the plate-like member 12 is set to be slightly smaller than the projected area of the space portion 11A. In addition, the size of the plate-like member 14 is set to be slightly smaller than the projected area of the space portion 11B.
Further, the upper surface of the measurement cuff 8 located between the space portions 11A and 11B is covered with the plate member 13 from above.
As shown in FIGS. 2 to 3, the plate-like member 13 is formed by projecting downward ribs 13A having the same dimensions over the entire area of both side parts extending in the longitudinal direction. The rib 13A is brought into contact with the seal portion S where the measurement cuff 8 is divided from above.
The plate-like member 13 of the present embodiment is provided with a flat plate-like pressing portion 13B and a pair of ribs 13A formed on both side portions in the longitudinal direction, and thus the cross-section of the plate-like member 13 is substantially U-shaped. Yes. The ribs 13A are formed with a plurality of notches 13C at predetermined intervals (see FIGS. 3 and 5). By providing these notches 13C, the plate-like member 13 can be easily elastically deformed following the cross-sectional shape of the upper arm A when the cuff belt 2 is attached to the upper arm A of the human body. Further, since the conduit 3 is closed by the electromagnetic on-off valve 5, pulsating air transmission can be prevented.
Since the seal portion S is formed at the boundary between the measurement cuff 8 and the pressure cuff 7 as described above, when the cuff band 2 is attached to the upper arm A and blood pressure is measured, Even if the pulsation is transmitted from the upstream of the artery, the presence of the seal portion S as the boundary portion prevents the vibration due to the pulsation from the pressure cuff 7 to the measurement cuff 8 from being transmitted. It has become.
Further, since both ribs 13A of the plate-like member 13 are brought into contact with the seal portion S that is the boundary between the cuffs 7 and 8 from above, the seal portion S is pressurized toward the artery by the rib 13A. It has become so.

Furthermore, in the present embodiment, the auxiliary portion 16 is provided on the plate-like member 13 in the main body 11 in order to make the pressure distribution on the measurement site of the upper arm A pressed by the measurement cuff 8 uniform. Yes. The auxiliary portion 16 has the above-mentioned auxiliary cuff 9 formed so that the pressure distribution in the cuff belt 2 is uniform, and a flat plate shape formed in accordance with the shape and size of the auxiliary cuff 9. Plate-like member 15. The plate-like member 15 is also provided for easy handling when the cuff belt 2 is attached to the upper arm A.
The auxiliary cuff 9 is formed in a bag shape sealed with a vinyl chloride sheet or polyurethane, and an introduction port 26 is provided at an upper portion thereof, and an end of the third branch pipe 25 is connected to the introduction port 26. (See FIGS. 2, 3, and 6). Therefore, when the pump 4 is operated as described above, air is also introduced into the auxiliary cuff 9 through the conduit 3 and the third branch pipe 25, and the auxiliary cuff 9 and the pressure cuff 7 are the same. Inflated with air pressure. Further, the air pressure in the auxiliary cuff 9 at that time is detected by the pressure sensor 22 and inputted to the signal amplifier 6B of the control device 6. When the control device 6 operates the constant speed exhaust valve 23, the air pressure in the auxiliary cuff 9 is exhausted at a constant speed. When the control device 6 opens the quick exhaust valve 24, the air pressure in the auxiliary cuff 9 is increased. Air is exhausted rapidly.
In the present embodiment, the pressure cuff 7 and the auxiliary cuff 9 communicate with each other via both branch pipes 19 and 25. However, the third branch pipe 25 is omitted and the main body 11 has A communication path for communicating the pressure cuff 7 and the auxiliary cuff 9 may be provided to supply air to the pressure cuff 7 and the auxiliary cuff 9.
The control device 6 of this embodiment includes a pump control unit 6F that controls the operation of the pump 4 in addition to the display unit 6A, the calculation unit 6D, the A / D converter 6C, the signal amplifier 6B, and the exhaust valve control unit 6E. And an electromagnetic valve control unit 6G for controlling the operation of the electromagnetic opening / closing valve 5.

A procedure for measuring the blood pressure of a person using the blood pressure measurement device 1 of the present embodiment configured as described above will be described.
First, in a state before the start of measurement, the electromagnetic opening / closing valve 5 is opened, the exhaust valves 21, 23, 24 are opened, and the operation of the pump 4 is stopped. In this state, the cuff band 2 before being expanded is wound around the upper arm A or the lower limb (ankle) and worn. At that time, the cuff band 2 is attached to the upper arm A or the lower limb so that the longitudinal direction of the cuff band 2 is orthogonal to the blood flow direction of the artery of the upper arm A or the lower limb and the space portion 11A is located on the upstream side. To do. Then, a measurement start switch (not shown) provided in the control device 6 is turned on (see S1 in FIG. 7).
Then, the exhaust valves 21, 23, 24 are first closed, and the pump controller 6 F of the control device 6 drives the pump 4, so that the cuff band 2 is added via the conduit 3 and the branch pipes 18, 19, 25. Air is fed into the pressure cuff 7, the measurement cuff 8, and the auxiliary cuff 9, and the cuffs 7 to 9 are expanded (see S2 in FIGS. 1, 2, and 7).

Accordingly, the air pressure in the measurement cuff 8 is detected by the pressure sensor 10 and input to the signal amplifier 6B of the control device 6, and the air pressure in the pressure cuff 7 and the auxiliary cuff 9 is detected by the pressure sensor 22 and controlled. The signal is input to the signal amplifier 6B of the device 6.
When the control device 6 confirms that the air pressure input from both the pressure sensors 10 and 22 has increased to a predetermined air pressure (air pressure equal to or higher than the maximum blood pressure of the person to be measured), the electromagnetic valve control unit 6G The electromagnetic on-off valve 5 is closed and the operation of the pump 4 is stopped by the pump controller 6F (S3, S4 in FIG. 7).
In this way, the cuffs 7 to 9 of the cuff belt 2 are pressurized to a predetermined air pressure and inflated, so that the arteries of the upper arm A or the lower limbs are compressed and blocked by the pressure cuff 7 and the measurement cuff 8 (is blocked). ).
At this time, since the auxiliary cuff 9 is also inflated, the plate-like member 13 is urged toward the artery by the expanded auxiliary cuff 9. As a result, the pair of ribs 13A of the plate-like member 13 presses the seal portion S that is the boundary between the measurement cuff 8 and the pressure cuff 7 toward the artery.
In this embodiment, since the seal portion S is provided at the boundary between both the cuffs 7 and 8, even if the pulsation of the artery is transmitted from the upstream side to the pressure cuff 7, the pressure cuff 7 The pulsation is not transmitted to the measurement cuff 8. Further, both ribs 13 </ b> A of the plate-like member 13 pressurize the seal portion S which is a boundary portion, and the measurement cuff 8 is covered with the plate-like member 13 and pressed by the auxiliary cuff 9. Therefore, the pressure distribution in the measurement part of the upper arm A pressed by the cuff band 2 can be made uniform.

Thereafter, the exhaust valve controller 6E of the control device 6 operates the constant speed exhaust valves 21 and 23 to discharge air from the cuffs 7 to 9 simultaneously at a predetermined constant speed (2 to 3 mmHg / S), for example ( S5 in FIG.
As a result, the air pressure in each of the cuffs 7 to 9 of the cuff belt 2 gradually decreases, and the arteries that have been blocked by the two cuffs 7 and 8 are released by the blood pressure, so that the blood passes through the arteries. Start to distribute.
The air pressure in the measurement cuff 8 is always detected by the pressure sensor 10 and input to the signal amplifier 6B of the control device 6, and the air pressure in both the cuffs 7 and 9 detected by the other pressure sensor 22 is also controlled. The signal is input to the signal amplifier 6B of the device 6.
Here, when blood begins to circulate in the artery that has been blocked, the pulse wave amplitude from the pressure sensor 10 rapidly increases, and the calculation unit 6D of the control device 6 recognizes the blood pressure at that time as the maximum blood pressure. (S6 in FIG. 7).

Furthermore, there is a place where the pulse wave amplitude of the measurement cuff 8 detected by the pressure sensor 10 when the exhaust of each cuff 7 to 9 continues continues, and the calculation unit 6D calculates the blood pressure at that time as the average blood pressure. Recognize as
Further, as the exhaust of the cuffs 7 to 9 continues continuously, the pulse wave amplitude by the pressure sensor 10 rapidly decreases, and the blood pressure at that time is recognized as the minimum blood pressure by the calculation unit 6D.
And if the calculating part 6D of the said control apparatus 6 recognizes the maximum blood pressure, the average blood pressure, and the minimum blood pressure recognized as mentioned above, while the electromagnetic valve control part 6G of the control apparatus 6 will open the electromagnetic on-off valve 5, The exhaust valve control unit 6E opens the quick exhaust valve 24 (S8, S9 in FIG. 7). As a result, the air in the cuffs 7 to 9 is quickly exhausted via the quick exhaust valve 24.
Thereafter, the calculation unit 6D of the control device 6 displays the maximum blood pressure, the average blood pressure, and the minimum blood pressure on the display unit 6A (S10 in FIG. 7). Further, the exhaust valve control unit 6E of the control device 6 opens both the exhaust valves 21 and 23, and the quick exhaust valve 24 maintains an open state.
When the maximum blood pressure, the average blood pressure, and the minimum blood pressure are displayed on the display unit 6A in this way, the cuff band 2 in the contracted state is removed from the upper arm A or the lower limb, and the blood pressure measurement operation is completed.
The increase in pressure of the measurement cuff 8 can be delayed by closing the electromagnetic on-off valve 5 at the start of measurement, supplying air for a predetermined time (for example, about 3 seconds), and then opening the electromagnetic on-off valve 5.
In this embodiment, since the two cuffs 7 and 8 blocked by the electromagnetic on-off valve 5 are controlled to perform the same pressure reduction by the constant speed exhaust valves 21 and 23, accurate blood pressure measurement can be performed.

In addition, although the above-mentioned operation | movement description is description in the case of measuring a blood pressure with the blood pressure measuring device 1, the blood pressure measuring device 1 of a present Example can also measure the pulse wave of the artery of an upper arm or a leg.
That is, in this case, when the blood pressure shown in FIG. 7 is measured, the processing after S7 in FIG. 7 is performed as follows. That is, as shown in FIG. 8, after the blood pressure measurement described above, rapid exhaust is performed with the electromagnetic on-off valve 5 closed (S8 in FIG. 8), and the measurement cuff 8 is, for example, a constant speed exhaust valve 21 up to a predetermined pressure of about 50 mmHg. To perform constant speed exhaust. And if the pressure of the measurement cuff 8 falls to the said predetermined pressure, the constant speed exhaust valve 21 will be closed (S9, S10 of FIG. 8). Thereby, the pressure of the measurement cuff 8 is maintained at a predetermined pressure.
In this state, the pulse wave of the artery at the measurement location pressurized by the measurement cuff 8 for a predetermined time is measured via the pressure sensor 10 (S11 in FIG. 8). Thereafter, the electromagnetic on-off valve 5 and the constant speed exhaust valve 21 are opened, and the pulse wave measurement is finished (S12 and S13 in FIG. 8).

In the above-described embodiment, the measurement cuff 8 is arranged so as to be sandwiched from the upstream side and the downstream side in the blood flow direction by the pressure cuff 7 including both the space portions 11A and 11B. A seal portion S is provided at the boundary portion. Moreover, in the state where the cuffs 7 to 9 are inflated at the time of measuring blood pressure, the seal member S is pressed toward the artery by the plate-like member 13 and its rib 13A.
Therefore, even if the pulsation is transmitted from the upstream side of the artery to the pressure cuff 7, the presence of the seal portion S and the rib 13 </ b> A of the plate-like member 13 causes the pressure cuff 7 to the measurement cuff 8. The pulsation is not transmitted.
Therefore, in this embodiment, when the cuff belt 2 is attached to the lower limb and each of the cuffs 7 to 9 is inflated, pulsation is prevented from being transmitted to the measurement cuff 8, and accurate blood pressure measurement is performed. Is possible. In the present embodiment, the pressure distribution is uniform over substantially the entire measurement area of the upper arm A or the lower limb pressed by the measurement cuff 8, so that blood can be reliably blocked and accurate blood pressure measurement is possible. .
Furthermore, by attaching the cuff band 2 of the blood pressure measurement device 1 of the above-described embodiment to each of the upper arm A and the ankle of the same person and measuring the pulse wave accurately, the rise time of the pulse wave of the upper limb and the lower limb can be determined. By comparing, it is possible to easily determine whether or not there is a stenosis in either the upper limb or the lower limb artery. According to such a method of use, it is possible to easily determine how much the patient's arterial stenosis has progressed.

Furthermore, as a result of research by the inventors of the present application, assuming that the blood pressure measuring device 1 of the present embodiment is provided on the first branch pipe 18 within a distance of about 10 cm from the measurement cuff 8, the pulse wave It has been found that the frequency characteristic of FIG.
Therefore, as shown in FIG. 9, as a second embodiment of the present invention, the electromagnetic on-off valve 5 is provided in the first branch pipe 18 separated from the measurement cuff 8 by about 10 cm or less. Then, the first branch pipe 18 and the pressure sensor 10 from the measurement cuff 8 to the measurement cuff 8 are integrally connected to the main body 11 of the cuff band 2. As a result, a stable attenuation rate of the pulse wave can be obtained, and the arrangement of the conduit 3 is simplified, and the cuff band 2 can be easily handled.
Further, FIG. 10 shows a third embodiment of the present invention related to the second embodiment. In the third embodiment, the electromagnetic on-off valve 5 and the pressure sensor 10 are separated from the main body 11. However, also in this embodiment, the lengths of the conduits and cables are adjusted so that the electromagnetic on-off valve 5 and the pressure sensor 10 are within a distance of 10 cm from the measurement cuff 8 of the main body 11. Other configurations are the same as those of the second embodiment. In such a third embodiment, the same operation and effect as in the second embodiment can be obtained.
In the above-described embodiment, the cuffs 7 to 9 are inflated all at once by opening the electromagnetic on-off valve 5 and operating the pump 4. However, a slight delay occurs after the pump 4 is operated. Thus, the electromagnetic on-off valve 5 may be opened. As a result, the pressure cuff 7 and the auxiliary cuff 9 are expanded first, and then the measurement cuff 8 is expanded with a slight delay.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows one Example of this invention. Sectional drawing of the principal part which follows the II-II line | wire of FIG. The perspective view which showed the structural member of the cuff band shown in FIG. The figure which showed the structure of the internal space of the main-body part 11 shown in FIG. The front view of the principal part of the plate-shaped member 13 shown in FIG. The figure which showed the structure of the internal space of the auxiliary cuff 9 shown in FIG. The figure which shows the process process at the time of measuring a blood pressure with the blood-pressure measuring apparatus 1 shown in FIG. FIG. 4 is a process diagram of the latter half when measuring a pulse wave by the blood pressure measurement device 1 shown in FIG. 1. The schematic perspective view of the cuff belt which shows the other Example of this invention. The schematic perspective view of the cuff belt which shows the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Blood pressure measuring device 2 ... Cuff belt 7 ... Pressure cuff 8 ... Measurement cuff 9 ... Auxiliary cuff 10 ... Pressure sensor 13 ... Plate-shaped member 13A ... Rib
S ... Seal part (boundary part)

Claims (4)

A cuff band that is attached to an arm or a leg and expands when blood is supplied to block blood vessels, and a pressure sensor that detects air pressure in the cuff band, and the cuff band is provided when air is supplied. A pressure cuff that expands and pressurizes the blood vessel to block blood, and a measurement cuff that expands and pressurizes the blood vessel when blood is supplied to detect blood pressure by the pressure sensor. In the blood pressure measurement device that measures the blood pressure based on the detection result of the air pressure by the pressure sensor,
A plate-shaped member is provided so as to cover the measurement cuff from above, and has a rib that contacts the boundary between the pressure cuff and the measurement cuff.
The blood pressure measuring device further includes an auxiliary cuff that expands when air is supplied and presses the rib of the plate-shaped member toward the blood vessel. The cuff band has a sealed flat bag-shaped main body portion, and the inside of the main body portion is divided into three space portions in the width direction by a frame-shaped seal portion extending in the longitudinal direction. The space portion of the position is the measurement cuff, and the pressure cuff is constituted by the remaining two space portions that communicate with each other with the measurement cuff interposed therebetween.
Further, the plate-like member is provided with the ribs on both sides along the longitudinal direction, and the pair of ribs of the plate-like member is brought into contact with the seal portion serving as a boundary between the pressure cuff and the measurement cuff. The blood pressure measurement device according to claim 1.   The pressure sensor is provided in a conduit for communicating the measurement cuff and the air supply source, and an electromagnetic on-off valve is provided on the conduit upstream of the pressure sensor, and further on the conduit on the downstream side of the electromagnetic on-off valve. An exhaust valve is provided, and when the air pressure in the measurement cuff exceeds the specified pressure, the electromagnetic on-off valve is closed and then the air in the measurement cuff is exhausted through the exhaust valve so that the blood pressure can be measured. The blood pressure measurement device according to claim 1, wherein the blood pressure measurement device is a blood pressure measurement device.   The blood pressure measurement device according to claim 3, wherein the pressure sensor and the electromagnetic on-off valve are disposed adjacent to the cuff belt.

Images