JPS59181128A - Hemomanometer having cuff winding state display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blood pressure device that can display whether or not the cuff wrapping operation is appropriate during indirect blood pressure measurement.

When measuring indirect blood pressure, it is necessary to wrap the cuff with an appropriate amount of strength in order to obtain accurate measurements. 7 i.e.
If the cuff is wrapped very loosely and then inflated by blowing air into the cuff, the cuff will cling to the arm with a very narrow width, thus reducing the effective width of the cuff. If the effective width of the arm cuff is less than a predetermined value, accurate measurement results cannot be obtained, so if the cuff is loosely wound, an inaccurate fnn pressure value will be obtained.

In addition, if the cuff is tightened too strongly, the effective width of the cuff can be increased, but it goes without saying that an accurate measurement value cannot be obtained.

As mentioned above, the appropriate LJ can be used to effectively obtain the effective width of the cuff.
Wrap the cuff around your arm with great strength (11 is extremely 1F)
However, in the past, when the cuff was rolled, the appropriateness of the strength setting was determined by V4+! Because there was no standard for analysis and each operator wrapped the cuff based on their own personal judgment, it is not possible that pressure measurements were always accurate. It was a thing.

Furthermore, if you try to judge the strength of the cuff's wrapping by the length of the cuff, for example, if you are measuring the blood pressure of multiple people with one blood pressure device, the thickness of the arm will be Since the lengths are different, it is not possible to determine the length of the winding at a constant value, and this method is inappropriate.

In view of the above-mentioned drawbacks of the conventional techniques, the present invention provides a blood pressure monitor that determines and displays whether or not the strength of cuff wrapping is appropriate.

The present invention will be explained below with reference to illustrated embodiments.

In Figure 1, 1 is a pump, 2 is a valve that adjusts the jX qi of pump 1, 3 is a flow sensor, A is a Glennon sensor, 5 is a round sensor, a 6-piece cuff, and 7 is an electrical meter. , 8 are the 11 circuits of the pressure gauge and the 9-digit display.

Next, the effect will be explained.

First, the cuff 6 is wrapped around the arm, and this is fixed with a known fastener, so that the cuff 6 cannot be wrapped around the arm.

By fixing the cuff 6, the length of the cuff 6 wrapped around the round sensor 5 is detected.

The round sensor 5 is made up of, for example, a belt-shaped resistor and a belt-shaped contact parallel to the resistor in the thickness direction, and is usually separated from the belt-shaped resistor, but it is possible to apply pressure partially at any location in the longitudinal direction. A known sensor is used as a sensor, which causes the contact and resistor to come into contact with each other at that point and generate a resistance depending on the position of the contact.
We can pick up about 7 units along its length. Therefore, cuff 6
When the round sensor 5 is wrapped around the arm and fixed with a fastener, the round sensor 5 will also be pressurized by the fastener, and conduction will occur at that part.
When the cuff 6 is wrapped, a resistor becomes conductive at a position corresponding to the length, and resistance is generated. By measuring and converting the value, the length of the cuff 6 can be detected.

The cuff 6 is wrapped around the arm, and the round sensor 5 detects the length of the cuff 6 and applies that value to the divisor circuit 7 as a resistance value.
The flow sensor 3 measures the flow rate of this air and transmits it to the divisor circuit 7. -force,
The pressure sensor detects the pressure in the cuff 6 and transmits the value to the tension counting circuit 7.

The value of the insufflation flow rate detected by the flow sensor 3 is multiplied by the divisor circuit 7, and the total amount of air insufflation is compared with the pressure inside the cuff 6 detected by the pre-non-yer sensor 4.

By the way, when the cuff 6E is wrapped tightly around the arm and fixed, the total flow rate required for the pressure inside the cuff 6 to reach a constant pressure depending on the thickness of the arm is -2-. In other words, the pressure reaches a certain value by supplying a certain volume of air. Therefore, if the thickness of the arm is detected by the length, then by comparing the volume and pressure of the air supply, it can be determined whether the strength of the winding is appropriate or not. I can tell.

That is, the counting circuit 7 is first given a value 7 of the length of the cuff 6 around the arm by the round sensor 5, and based on this, it compares the values from 70 to the sensor 3 and the pressure sensor 4, and calculates the length of the cuff 6 around the arm. Inquiry will judge whether the strength is appropriate or not and display the result.

The following means are performed for the above display.

If the wrapping strength is inappropriate, an indication and/or a buzzer will appear on the display 9 indicating that the wrapping strength is inappropriate;
Perform operations such as operating lamps, etc.

, or interrupt the blood pressure measurement operation by opening the pulp 2, stopping the operation of the pump 1, or other means.

In this way, the wrapping of the cuff 6 can be strengthened by displaying information on the display 9 and/or other means, and/or interrupting the blood pressure measurement operation, or by using other appropriate means. Display that the content is inappropriate.

When the winding strength is appropriate, a message indicating that the winding strength is appropriate is displayed on the display 9.

This display may be performed by other means such as lighting a blue lamp. Alternatively, the display 9 may display no information at all, and the monthly blood pressure measurement operation may not be interrupted, thereby indicating that it is appropriate.

The fltll I11 circuit 8 opens the valve 2 and gradually increases the pressure in the cuff 6 when the pressure sensor 4 reaches a certain value, and in the process uses known methods such as the Rybaronoch-Korotkov method, the vibration The highest required by law,
-Detect low blood pressure 1] and display the value on the display 9.

In the above embodiment, the round sensor 5 detects the length of the cuff 6 wrapped around the arm, so it may be configured as shown in FIG. 2, for example.

That is, in FIG. 2, when the cuff 6 is wrapped around the arm 10 having the bones T and Oa, and the cuff 6 is partially pressurized with a tightening tool at the arrow-shaped part, the edge of the cuff 6 is pressed. Round sensor 5? Contact 5a formed by I7j.

resistor 51], and each lead wire 11a.

111), the contact 5aK resistor 5h comes into contact with the arrow 4, and conducts electricity. The position of the arrow 4 varies depending on the thickness of the arm 10 or the tightness of the wrapping, so the resistance value generated in the resistor 5b changes accordingly, and the resistance value of the portion wrapped around the arm 10 changes accordingly. The length of the cuff 6 is detected.

Furthermore, in the above embodiment, the value of the volume of air delivered into the cuff 6 is obtained by the counting circuit 7 integrating the detection value of the flow sensor 3, but the means for detecting the volume of air delivered is as follows. Alternatively, it may be determined based on the rotational speed of the pump 1 and the discharge amount per unit rotational speed, and the object of the present invention can be achieved by any other means capable of detecting the air volume.

Furthermore, as for the means for supplying air to the cuff 6, in addition to the means using the pump 1, high pressure air may be introduced from an air tank, or other means may be used. In addition, when supplying air from an air tank in this way, it is also possible to measure the pressure inside the air tank before supplying air, and estimate the volume of supplied air based on the value of the pressure drop after the supply of air starts. It will be done.

Further, the pressure sensor 4 as a means for detecting the pressure within the cuff 6 may be of a type that converts a change in pressure into a change in resistance value, for example, or may be of a type that converts a change in pressure into a change in resistance value.
Any means that can detect the value of pressure change may be used.

According to the present invention, in the indirect blood pressure measurement method, the suitability of the cuff wrapping, which has an extremely large effect on the measured value, is reliably detected and displayed, so it can be used regardless of the measurement technique. , the effect of being able to accurately measure blood pressure without variation can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining the present invention in detail, and FIG. 2 is an explanatory diagram showing a specific example of the round sensor 5. As shown in FIG. 1・・・・・・・・・・・・・・・Pump 2・・・・・・
・・・・・・・・・Pulp 3・・・・・・・・・・・・
・・・・Flow sensor 4・・・・・・・・・・・・・
・・Pressure sensor 5・・・・・・・・・・・・
...Round sensor 6...Cuff 7...Counting circuit 8...
......Control circuit 9...
...Display 10... ...Arm Figure 2 Procedure correction (method) ■ Display of the case 1982 Patent Application No. 56734 2 Name of the invention Cuff wrapping is appropriate display Blood H-i + 111 fixed device 3 with Supplementary IF Person special Fr i, l: + Mi person〒174 Tokyo board'm Shimura 2-16-20 Telephone (9
69) 4429 Showa 584P June 28th

Claims (1)

[Claims] In the indirect JITL pressure measuring device f+', i, which measures blood pressure by wrapping the cuff around the arm and supplying air to increase the pressure and then reduce the pressure, the volume of air supplied to the cuff 6 is detected. 1. means for detecting the pressure within the cuff 6; means for detecting the length of the wrapping of the cuff 6; and means for supplying air to the cuff 6 when the wrapping strength of the cuff 6 is appropriate. It consists of a counting circuit 7 in which the relative relationship between the volume, pressure, and length of each □ value is stored; . The cuff wrap is a device that displays the suitability of the cuff wrap, which stores the relative relationship between the values obtained by detecting the length and compares it with the measured value. A blood pressure measuring device that cures.