JPH07178065A - Testing method of sphygmomanometer and sphygmomanometer - Google Patents

Abstract

PURPOSE:To detect the abnormal condition of a sphygmomanometer such as a trouble of a gradual exhaust valve and leakage of air. CONSTITUTION:An air tank 7 with a specific capacity is installed instead of a pressure band 2, and after pressurizing the inside of the air tank up to the first specific pressure by a pressure means, the air is exhausted by a gradual exhaust means, and the time or the speed in a specific period from the second specific pressure to the third specific pressure is measured, and the result is displayed by a display means. Or, in the other way, an air tank with a specific capacity is installed instead of the pressure band 2, the air tank is pressurized by a pressure means, and the pressure lowering condition is measured in the condition the air passage to the gradual exhaust means is cut off. The reproducibility can be given to the pressure lowering speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sphygmomanometer, and more particularly to an inspection method for detecting air leaks and gradual exhaust valve malfunctions of electronic blood pressure monitors for general household use.

[0002]

2. Description of the Related Art An electronic sphygmomanometer compresses a measurement site such as the upper arm of a person to be measured with a compression band which is pressurized by a pressure means, and gradually lowers the blood pressure value by exhausting air from an exhaust valve. In addition to the above-mentioned pressurizing means and compression band, pressure detection means, blood pressure value determination means, display unit for displaying blood pressure value, air in the compression band after completion of blood pressure measurement are measured quickly. It is configured as equipped with a quick exhaust valve and the like for pulling out.

[0003]

When measuring the blood pressure, the exhaust speed of the exhaust means, that is, the step-down speed, gradually affects the measurement accuracy. For example, the exhaust means gradually fails and the step-down speed is lowered. If blood pressure becomes faster or air leaks from the piping, blood pressure cannot be measured accurately.

For this reason, by measuring the above-mentioned pressure-reducing speed, for example, the time until the pressure falls from a predetermined pressure to another predetermined pressure, it becomes possible to check whether or not the pressure-reducing speed is within a desired range. However, in this case, there are the following problems. That is, the compression band that is pressurized by the pressure applying means is usually
Since it is made of an elastic material such as a rubber bag, the pressure reduction rate varies depending on whether the compression band is wrapped around the arm or not, and even when it is wrapped around the arm, The step-down speed varies depending on the diameter of the wire and the strength of winding, and the reproducibility is poor, so that an effective test cannot be performed.

Even if it is checked whether there is an air leak,
When the compression band, which is an elastic body, is connected, it is difficult to make an accurate determination because it is affected by the compression band. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sphygmomanometer inspection method capable of gradually detecting an abnormality such as a failure of an exhaust valve or an air leak.

[0006]

According to the method of inspecting a sphygmomanometer according to the present invention, an air tank having a constant capacity is attached instead of the compression band, and the inside of the air tank is pressurized by the first predetermined pressure. After gradually pressurizing, the gas is gradually exhausted by the exhaust means, and the time or speed at which the pressure drops in a certain section from the second predetermined pressure to the third predetermined pressure is measured and displayed on the display means. The first feature is that an air tank having a constant capacity is attached instead of the compression band, the pressurizing means is operated to pressurize, and the pressure is gradually decreased while the air flow path to the exhaust means is blocked. The sphygmomanometer according to the present invention has a second feature in measuring the state, and a squeezing band that squeezes a main part of a person to be measured, and a pressurizing unit that raises air pressure inside the squeezing band. Gradual exhaust means to gradually exhaust the air inside the compression band and compression Pressure detection means for detecting internal air pressure, maximum blood pressure value or minimum blood pressure value determination means, display means for displaying measured blood pressure value, shutoff means for gradually shutting off the air flow path to the exhaust means, and pressure drop With the inspection means for monitoring the state and displaying the result on the display means,
It is characterized in that it is provided with an air tank of a fixed capacity, which is connected instead of the compression band.

[0007]

According to the first feature of the present invention, in order to connect an air tank having a constant capacity in place of the compression band,
The step-down speed can be made reproducible, and the exhaust valve can be inspected accurately. According to the second feature, the exhaust valve is shut off gradually. It is possible to reliably detect air leaks in pipes and the like.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the blood pressure monitor shown in the figure. In FIG. 3, a blood pressure measurement switch 4, and an inspection switch 5 are provided, and the compression band 2 is connected via a tube 10. A pressurizing pump 8 is provided in the blood pressure monitor body 1.
A gradual exhaust valve 9, a rapid exhaust valve 10, and a pressure detector 11 are arranged, and these are connected to the compression band 2 via the tube 10. The control unit 12 including a microcomputer is provided, and the pressurizing pump 8 and the quick exhaust valve 1 are provided.
0 and the display unit 6 are connected to the control output and the display output of the control unit 12, and the output of the pressure detector 11 is input to the control unit 12.

In this sphygmomanometer, the compression band 2 can be separated from the sphygmomanometer body 1 by a connector portion provided at the tip of the tube 10, and the sphygmomanometer has a constant capacity and a tube. The air tank 7 to which 70 is connected can be connected to the sphygmomanometer main body 1 by utilizing the connector 71 at the tip of the tube 70.

However, in the normal blood pressure measurement, after the compression band 2 is wrapped around the subject's main part such as the upper arm,
When the power switch 3 is turned on and the measurement switch 4 is pressed, the quick exhaust valve 10 is closed and the pressurizing pump 8
Is activated and air is sent to the compression band 2, and when the air pressure inside the compression band 2 rises to a predetermined pressure, the pressurizing pump 8 is stopped and the exhaust valve 9 gradually exhausts to reduce the pressure. The determination of the maximum blood pressure value and the minimum blood pressure value is performed by the control unit 12, the measurement result is displayed on the display unit 6, and the rapid exhaust valve 10 is opened to remove the air remaining in the compression zone 2.

When the exhaust valve 9 is inspected gradually,
Instead of the compression band 2, an air tank 7 may be connected and the inspection switch 5 may be pressed. If the inspection switch 5 is pressed, the control unit 12 closes the quick exhaust valve 10 and operates the pressurizing pump 2 to bring the air tank 7 to the predetermined pressure P1.
The internal pressure is increased, and then the pressurizing pump 2 is stopped to gradually reduce the pressure by exhausting the exhaust valve 9.
Then, as shown in FIG.
The control unit 12 measures the time ΔT or the pressure reduction rate ΔP / ΔT required to decrease from 2 to the predetermined pressure P3, and displays this value on the display unit 6. Time ΔT or step-down speed ΔP / ΔT
Depending on whether or not is within the range of the standard
The quality of the exhaust valve 9 can be determined gradually, and since the test is performed in the state where the compression band 2 that is an elastic body does not exist, reproducible inspection results can be obtained.

By the way, the gradual exhaust valve 9 is usually designed to reduce the pressure at a constant speed when the compression band 2 whose volume changes depending on the magnitude of the pressure is connected. When the air tank 7 having a constant capacity is connected, the pressure is not reduced at a constant speed. Therefore, as shown in FIG. 3, the time ΔT1, ΔT2 or the pressure reducing rate ΔPa / ΔT1, ΔPb / ΔT2 is measured in two sections, that is, the section where the pressure P2 is reduced to the pressure P3 and the section where the pressure P4 is reduced to the pressure P5. By doing so, it becomes more reliable.

When the gradual exhaust valve 9 is always open, a valve 13 for shutting off the air flow path to the gradual exhaust valve 9 is provided as shown in FIG. If the exhaust valve 9 is gradually closed, it can be inspected for air leakage. In this case, if the air tank 7 is connected, it may be inspected whether or not there is a pressure drop immediately after the pressurizing pump 8 pressurizes to the predetermined pressure P1, but after the pressurizing pump 8 is stopped. You may make it measure and display the fall pressure of a fixed time. If this inspection is performed in the state where the compression band 2 is connected, it is also possible to perform an inspection as to whether or not there is air leakage from the compression band 2.

As the valve 13, a check valve as shown in FIG. 5 can be used. In the figure, 14 and 15 are valve cases, 16 is packing, 17 is a valve seat, and 18 is a valve element made of an elastic body, and air is from port A side to port B side.
Flow to the side, but do not flow from the port B side to the port A side. This valve 13 is connected so that the port B is gradually on the exhaust valve 9 side, and when shutting off the air flow path to the exhaust valve 9, gradually apply a pressure sufficiently higher than the inspection pressure P1 from the exhaust valve 9 side. Thus, the valve 13 can be kept closed, and the air flow path to the exhaust valve 9 can be gradually shut off.

In the valve 13 shown in FIG. 6, the direction of the port B with respect to the port A is made variable by making the case 15 rotatable with respect to the case 14 so as to match the convenience of piping in the sphygmomanometer body 1. It shows what can be done. Further, as shown in FIG. 7, if the valve 13, which is a check valve, is installed by connecting the port A to the discharge port of the pressurizing pump 8, the air leak from the pressurizing pump 8 is prevented,
Each of the above inspections can be performed. In this case, if the valve 13 is provided with the air chamber 20 on the port A side as shown in FIG. 8, the pressurizing pump 8 without increasing the air capacity of the air passage.
The noise can be reduced. When the oscillometric method is used as the blood pressure measurement method, the increase in the air volume causes the pulse wave amplitude to be attenuated, resulting in a decrease in accuracy. become.

[0016]

As described above, in the present invention, since the air tank having a constant capacity is connected instead of the compression band, the step-down speed can be made reproducible, and the exhaust valve can be tested accurately. According to the second feature, since the exhaust valve is gradually shut off, it is possible to reliably detect an air leak in the pipe or the like. The user can accurately detect an abnormality such as a failure or air leakage.

[Brief description of drawings]

1A and 1B are a perspective view and a block circuit diagram of an embodiment.

FIG. 2 is an operation explanatory diagram of the above.

FIG. 3 is another operation explanatory view.

FIG. 4 is a block circuit diagram in another embodiment.

5 (a) and 5 (b) are a front view and a sectional view of an example of a valve.

6 (a) and 6 (b) are a front view and a sectional view of another example of the valve.

FIG. 7 is a block circuit diagram in another embodiment.

FIG. 8 is a sectional view of the valve of the above.

[Explanation of symbols]

 2 Compression zone 6 Display 7 Air tank 8 Pressurizing pump 9 Gradual exhaust valve

Claims (6)

[Claims] 1. A compression band for compressing a main part of a person to be measured, a pressurizing unit for increasing air pressure inside the compression band, a gradual exhausting unit for gradually discharging air inside the compression band, and an internal compression unit for compressing the compression band. A method of inspecting a sphygmomanometer, comprising: a pressure detecting means for detecting an air pressure; a determining means for a systolic blood pressure value or a diastolic blood pressure value; In place of the above, the inside of the air tank is pressurized to a first predetermined pressure by a pressurizing means, and then exhausted by an exhausting means, and a constant section from a second predetermined pressure to a third predetermined pressure. A method of inspecting a sphygmomanometer, characterized in that the time or speed at which the pressure drops is measured and displayed on the display means. 2. The method for inspecting a sphygmomanometer according to claim 1, wherein each pressure drop time or each pressure drop speed in two constant sections having different predetermined pressures is measured and displayed on the display means. 3. A compression band for compressing a main part of a person to be measured, a pressurizing means for increasing the air pressure inside the compression band, a gradual exhausting means for gradually discharging the air inside the compression band, and an internal compression band for the compression band. A method of inspecting a sphygmomanometer, comprising: a pressure detecting means for detecting an air pressure; a determining means for a systolic blood pressure value or a diastolic blood pressure value; In place of the above, the method for inspecting a sphygmomanometer is characterized in that a pressure drop state is measured in a state in which the pressurizing means is actuated to pressurize and the air flow path to the exhaust means is gradually blocked. 4. The method for testing a sphygmomanometer according to claim 3, wherein a compression band is connected instead of the air tank having a constant capacity. 5. A compression band for compressing an essential part of a person to be measured, a pressurizing means for increasing the air pressure inside the compression band, a gradual exhausting means for gradually discharging the air inside the compression band, and an internal pressure band for the compression band. A pressure detection means for detecting the air pressure, a determination means for the systolic blood pressure value and the diastolic blood pressure value, and a display means for displaying the measured blood pressure value,
An air tank having a constant capacity, which is provided with a shutoff means for gradually shutting off the air flow path to the exhaust means, and an inspection means for monitoring the pressure drop state and displaying the result on the display means, and which is connected instead of the compression band A sphygmomanometer characterized by comprising. 6. The shut-off means for shutting off the air flow path to the gradual exhaust means comprises a check valve and an application member for applying high-pressure air from the gradual exhaust means side. Sphygmomanometer.