JPH0763451B2 - Electronic blood pressure monitor - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to an electronic sphygmomanometer, and particularly to an electronic sphygmomanometer that can be easily switched to a pressure verification mode.

[Prior art]

There is a pressure verification mode in which the pressure applied from the outside of the electronic sphygmomanometer is displayed as it is to check the accuracy of the pressure detection part of the electronic sphygmomanometer. Since such a pressure verification mode is different from the normal operation mode of the sphygmomanometer, when performing this pressure verification, the sphygmomanometer itself must be set to the pressure verification mode. Conventionally, this mode setting instruction is performed by short-circuiting a jumper wire or the like on the circuit board of the sphygmomanometer and then turning on the power. As a result, the control unit or the like of the electronic sphygmomanometer detects that the jumper wire is short-circuited and automatically switches to the pressure verification mode. In this pressure verification mode, when air is injected from the connection port between the cuff and the sphygmomanometer main body, the air pressure is detected, and the pressure value is displayed.

[Problems to be Solved by the Invention]

However, in such a conventional method for setting the pressure verification mode, the jumper wire on the substrate is short-circuited, which increases the number of work steps and may cause contact failure of the jumper wire. Also, there are those such as providing a special switch for instructing the pressure verification mode, or instructing the start of the pressure verification mode by pressing a plurality of keys at the same time. Even when the normal blood pressure measurement is desired, the operator may mistakenly instruct the pressure verification operation mode. Furthermore, for example, 300m
By applying a high pressure of mHg or more, a sphygmomanometer that can recognize that it is in the pressure verification mode is also proposed, but this method causes malfunction when measuring an abnormally high blood pressure, Further, in order to apply a pressure higher than this, there are many problems because a compressor or the like for injecting compressed air from the outside is required to have its performance. The present invention has been made in view of the above conventional example, and an object of the present invention is to provide an electronic sphygmomanometer that can easily instruct and set the pressure verification mode without using a jumper wire or the like.

[Means for Solving the Problems]

In order to achieve the above object, the electronic blood pressure monitor of the present invention has the following configuration. That is, armbands, pressurizing means for supplying pressurized air to the armbands, pressure detecting means for detecting the pressure of the pressurized air, and pressure display means for displaying the pressure detected by the pressure detecting means. And an exhausting means for exhausting the pressurized air in the arm band, wherein whether or not the predetermined pressure is verified by the pressure detecting means after the pressurizing means pressurizes for a predetermined time. Determining means for determining whether the predetermined pressure is not detected by the determining means, a means for shifting to an error state, stopping the pressurization by the pressurizing means, and performing exhaust by the exhaust means, When a predetermined pressure rise or pressure is detected by the pressure detection means in an error state in which pressurization by the pressurization means is stopped, the exhaust means is closed.
And a control unit that controls the pressure display unit to display the detected pressure value. [Operation] In the above configuration, it is determined whether or not the predetermined pressure is detected after the pressurizing means has pressed for a predetermined time, and when it is determined that the predetermined pressure is not detected, the pressurizing means stops the pressurization. Then, the state shifts to an error state in which exhaust is performed by the exhaust means. After that, when a predetermined pressure rise or pressure is detected by the pressure detection means in the error state where the pressurization by the pressurization means is stopped, the exhaust means is closed, and the detected pressure value is displayed on the pressure display means. Switch to the verification mode.

【Example】

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. <Configuration of Electronic Sphygmomanometer (FIGS. 1 and 2)> FIG. 1 is an external perspective view of the electronic sphygmomanometer of the present embodiment, and FIG. 2 is a block diagram showing a schematic configuration of the electronic sphygmomanometer of the embodiment. is there. In FIG. 1, reference numeral 10 indicates an electronic sphygmomanometer body of the embodiment.
Reference numeral 11 is a power switch, and 12 is a start switch for instructing the start of blood pressure measurement. Reference numeral 13 denotes a display unit such as a liquid crystal which displays the measurement result and the like. Reference numeral 14 is a nozzle connecting portion into which the fitting portion 16 of the nozzle 15 that connects the arm band (106 in FIG. 2) and the main body 10 is inserted. In FIG. 2, 101 is a CPU for arithmetic control that controls the entire electronic blood pressure monitor, and 102 is a flow chart in FIG.
Stores CPU 101 control programs and various data
ROM. A RAM 103 is used as a work area of the CPU 101 to temporarily store various data, and also stores measured blood pressure values, various data to be displayed on the display unit 13, and the like. Reference numeral 104 denotes a cuff pressure detection unit, which is a pressure sensor 41 that detects the air pressure injected from the nozzle connection unit 14, an amplifier 42 that amplifies the output signal of the pressure sensor 41, and an output signal of the amplifier 42.
It is equipped with an A / D converter 43 and the like. Reference numeral 105 denotes a cuff pressure control unit including an exhaust valve 53 that controls the pressure of the arm band (cuff) 106. Reference numeral 51 denotes a motor / valve drive unit, which drives the air supply pump 52 and the exhaust valve 53 according to an instruction from the CPU 101, and thus the cuff 106.
The pressure inside is controlled. When measuring the blood pressure, the exhaust valve 53 is closed, the cuff pressure is detected by the cuff pressure detection unit 104 at this time after the exhaust valve 53 is opened and the pressure is reduced after the arm pump 106 is pressurized by the air supply pump 52. Based on, the blood pressure of the subject is measured. Reference numeral 13 indicates and displays the detected maximum blood pressure value, minimum blood pressure value, pressure value detected in the pressure verification mode, or insufficient pressurization or measurement failure. CPU101, ROM102, RAM1
03, the cuff pressure detection unit 104, the cuff pressure control unit 105, and the display unit 13 are connected to each other by a bus 108, and exchange data with the CPU 101. Reference numeral 109 is a timer, which counts time according to an instruction from the CPU 101, and when the instructed time has elapsed, notifies the CPU 101 by, for example, an interrupt. <Description of Operation (FIGS. 1 to 4)> FIG. 4 is a flow chart showing the control operation of the CPU 101 in the electronic blood pressure monitor of the embodiment, and the control program for executing this processing is stored in the ROM 102. This control is started by depressing the start switch 12, and first, at step S1, the timer 109 is initialized, and at step S2, the exhaust valve 53 is closed, and at the same time, the pressure of the pump 52 is increased to increase the pressure to the cuff. Start driving. At the same time as starting the operation of this pump 52,
Start timing with 109. In step S3, timer 109
If 10 seconds have not elapsed, the process proceeds to step S4 and the pressure sensor 41 detects that the cuff pressure is 20 seconds.
Check if it has risen to mmHg. When the cuff pressure rises to 20 mmHg, the nozzle is connected to the nozzle connecting portion 14, and since the normal blood pressure measurement is being performed, the process proceeds to step S5 to execute the blood pressure measurement process. In the pressure verification mode, since the cuff 106 is not connected to the main body, the nozzle connection portion 14 remains open at first. Therefore, even if the valve 53 is closed and the pump 52 is driven in this state, the pressure sensor 41 does not detect an increase in the cuff pressure. In this case, the process proceeds from step S3 to step S6, and as an operation error, the driving of the pump 52 is stopped and the exhaust valve 53 is opened. In this way, the exhaust valve 53 is opened to return the pressure applied to the pressure sensor 41 to the normal atmospheric pressure. Such error processing is caused by the measurement failure or the measurement failure caused by the removal of the arm band 106, the rubber bag inside the arm band being broken, the arm band 106 not being properly attached to the arm, or the rubber bag being too bulged. . When such an error occurs, the process proceeds to step S7, the error is displayed on the display unit 13 by "E-01" or the like (see FIG. 3A), and the operator is informed of the occurrence of the measurement error. Inform. If normal blood pressure measurement is to be performed, after resetting the armband or repairing the faulty part in this state and pressing the start switch 12 again, step S8 returns to step S2 and blood pressure measurement is performed again. Be seen. On the other hand, in the pressure verification mode, an external (not shown) air injection nozzle is connected to the nozzle connection portion 14 of the sphygmomanometer, and compressed air is injected from here. As a result, when a pressure of 50 mmHg or more is detected by the pressure sensor 41 in step S9, or when the inclination of increase in pressure is detected, the process proceeds to step S10, the exhaust valve 53 is closed, and in step S11, the pressure sensor 41 detects The detected pressure is displayed on the display unit 13. An example of this display is shown in FIG. In this pressure detection, after the sensor signal detected by the pressure sensor 41 is amplified by the amplifier 42, the sensor signal is amplified by the A / D converter 43.
Is converted into a digital value and input to the CPU 101. The CPU 101 refers to the digital value and a table stored in the ROM 102 or the like, obtains a pressure value according to the digital value, and displays this as a measured pressure on the display unit 13. As described above, according to the present embodiment, normal blood pressure measurement is started with the arm band removed, and after an error due to insufficient pressurization occurs, the pressure applied from the outside is automatically detected. Since the pressure verification mode is entered, the circuit board or the like need not be specially worked, and an operation error or the like caused by instructing with a key switch or the like can be prevented. Further, it is not necessary to require special performance for a compressor or the like that injects compressed air from the outside. In the pressure verification mode, the air injected from the outside is
A pressure reference device such as a compressor (not shown) may be used, or pressure may be applied by a rubber ball or the like.

【The invention's effect】

As described above, according to the present invention, there is an effect that a work by a jumper wire or the like is not required, an operation mistake by an operator is reduced, and a pressure verification mode can be easily instructed and set.

[Brief description of drawings]

FIG. 1 is an external perspective view of the electronic sphygmomanometer of the present embodiment, FIG. 2 is a block diagram showing a schematic configuration of the electronic sphygmomanometer of the present embodiment, and FIG. 3 (A) is a diagram showing an error display example. FIG. 3 (B) is a diagram showing an example of pressure measurement display in the pressure verification mode, and FIG. 4 is a flowchart showing a measurement process of the electronic sphygmomanometer of the present embodiment. In the figure, 10 …… Sphygmomanometer main body, 11 …… Power switch, 12 ……
Start switch, 13 …… Display section, 14 …… Nozzle connection section, 15 …… Nozzle, 41 …… Pressure sensor, 42 …… Amplifier,
43 …… A / D converter, 51 …… Motor valve drive, 52 ……
Pump, 53 ... Exhaust valve, 101 ... CPU, 102 ... ROM,
103 ... RAM, 104 ... Cuff pressure detection unit, 105 ... Cuff pressure control unit, 106 ... Cuff (arm band).

Claims (1)

[Claims] 1. An arm band, a pressurizing means for supplying pressurized air to the arm band, a pressure detecting means for detecting the pressure of the pressurized air, and a pressure detected by the pressure detecting means. An electronic sphygmomanometer comprising a pressure display means and an exhaust means for discharging the pressurized air in the arm band, wherein the pressure detecting means detects a predetermined pressure after the pressurizing means pressurizes for a predetermined time. Determining means for determining whether or not the predetermined pressure is detected by the determining means, and a means for shifting to an error state, stopping pressurization by the pressurizing means, and exhausting by the exhausting means When a predetermined pressure rise or pressure is detected by the pressure detection means in an error state in which the pressurization by the pressurization means is stopped, the exhaust means is closed, and the detected pressure value is displayed by the pressure display means. To display in Electronic blood pressure monitor characterized in that it comprises a Gosuru control means.