RU2542095C2 - Tonometer function testing device - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment. A tonometer performance testing device comprises a thin-walled cylinder (1) having a diameter close to an individual's arm diameter. The cylinder (2) is made of spring steel and has a through cut along a lateral surface (2) parallel to the cylinder axis. Two angle brackets (3, 4) are mounted inside the cylinder (1) from each side of the cut. One side of each angle bracket is attached to an inner surface of the cylinder (1) wall; a permanent magnet (8) is attached to the other side of one angle bracket (4), while the other side of the second angle bracket (3) comprises three magnetic reed relays (5-7), which are electrically connected to a logic assembly (12) and three light indicators (9-11) mounted on a circuit board (19). An electric magnet (13) mounted on the circuit board (19) consists of a core coil (14), an elastic steel plate (15) intermittently attached to a magnetically conductive rack with a semi-circular groove (16), and a magnetically conductive base (17). The coil (14) is electrically connected to a power supply unit (18) mounted on the circuit board (19) of the electric magnet (13), while the logic assembly (12) is configured to control the operation of the light indicators (9-11) and the power supply unit (18) of the electric magnet (13).

EFFECT: using the invention enables testing the functions of automatic tonometers.

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Description

The invention relates to medical equipment and can be used to monitor the health of tonometers.

Known methods and devices for checking (checking) tonometers.

Automatic blood pressure monitors are checked (checked), for example, using the “Prosim 8 Signal Generator” installation, which can set the required pressure with an accuracy of overpressure in the tonometer cuff in the range from 20 to 215 mm Hg. and heart rate from 30 to 300 min ^-1 .

The automatic blood pressure monitor cuff is put on a hard hand simulator, the values of upper, lower pressure and pulse rate are set on the generator. An automatic blood pressure monitor measures the set values. The obtained values are compared with the established ones and a conclusion is drawn on the suitability of the automatic tonometer.

For the consumer, this method has the following disadvantages when used by the consumer independently:

a) the very high cost of installing "Prosim 8 Signal Generator";

b) the need for periodic verification of the installation "Prosim 8 Signal Generator";

c) the need for payment for periodic verification of the installation.

The objective of the present invention is to provide a device with which any consumer can check the operability of his tonometer.

The problem is solved due to the fact that the proposed device contains:

a thin-walled cylinder with a diameter close to the diameter of a person’s hand, made of spring steel, which has a through cut along the side surface parallel to the axis of the cylinder, and two corner brackets are installed inside the cylinder on each side of the cut, with one side of each bracket attached to the inner surface of the cylinder wall , on the other side of one bracket a permanent magnet is fixed, and on the other side of the second bracket are three reed switches electrically connected to the logic device and The LEDs mounted on the board also have an electromagnet mounted on the board and consisting of a coil with a core, an elastic steel plate that can be periodically pulled to a magnetic conductor with a semicircular groove, and a magnetic conductor base, while the coil is electrically connected to the electromagnet power supply installed on the board, and the logic device is configured to control the operation of the LEDs and the power supply unit of the electromagnet.

The technical result achieved is achieved by the creation of a device for checking the operation of automatic tonometers by the consumer.

The invention is illustrated by drawings, where:

FIG. 1 is a block diagram of a device for checking the health of tonometers;

FIG. 2 - an example of the implementation of circuit diagrams of a logic device with LEDs and an electromagnet.

The proposed device for checking the health of tonometers consists of an elastic thin-walled cylinder 1, which has a through section of the side wall 2. Two angular brackets 3 and 4 are fixed on the inside of the elastic cylinder 1. Three reed switches 5, 6, 7 are installed on the angular bracket 3. a permanent magnet 8 is mounted to the bracket 4. The reed switches 5, 6, 7 are electrically connected to a logic device 12, which controls the operation of the LEDs 9, 10, 11 and the power supply unit 18 of the electromagnet 13.

The electromagnet 13 consists of a coil with a core 14, an elastic steel plate 15, a magnetically conductive rack with a semicircular groove 16, and a magnetically conductive base 17. A logic device 12 with LEDs 9, 10, 11, a power supply 18, and an electromagnet 13 are installed on the board 19. Between the elastic steel a plate 15 and a magnetically conductive stand 16, in its semicircular groove an air hose 20 of the checked automatic tonometer is placed.

The logic device circuit may consist of four relays P1, P2, P3, P4, the contacts of which are included in the circuit of the power supply 18 of the electromagnet 13 and in the circuit of the light indicators C9, C10, C11.

Consider the work of checking automatic blood pressure monitors. The cuff of the tested tonometer is put on an elastic cylinder 1 having a longitudinal section 2 of the side surface running parallel to the axis of the cylinder. The air hose 20 connecting the cuff and the control unit of the automatic tonometer fits into a semicircular groove of the magnetically conductive strut 16, which is part of the electromagnet 13.

After pressing the key that starts the operation of the automatic blood pressure monitor and turning on the switch B, which supplies voltage to the power supply unit 18 of the electromagnet 13, the air pump of the automatic blood pressure monitor turns on the air in the cuff, and an alternating pulse voltage is supplied from the power supply unit 18 to the coil with the magnet core 14 13. In this case, the elastic steel plate 15 is periodically attracted to the magnetic conductor 16 and periodically compresses the air hose 20, simulating a pulse. With increasing air pressure in the cuff of the automatic tonometer, which is worn on an elastic steel cylinder 1, the latter decreases its diameter and brings the edges of the slit 2 closer together with the angle brackets 3 and 4.

The side of the angular bracket 4 with the permanent magnet 8 fixed on it passes by the side of the angular bracket 3 with the reed switches 5, 6, 7 fixed on it, causing their sequential operation. When the elastic cylinder 1 is compressed, the reed switch 5 is first closed, followed by the reed switch 6 and then the reed switch 7. The contacts of the reed switches 5, 6, 7 are electrically connected to a logic device 12, which controls the ignition order of the LEDs 9, 10, 11 and the power supply to the electromagnet 13.

The logic device diagram is constructed in such a way that when the elastic cylinder 1 is compressed and the contacts of the reed switches 5 and 6 are closed, the lights 9 and 10 do not light up. When the contacts of the reed switch 6 are closed, the logic device disconnects the power supply from the power supply unit 18 of the electromagnet 13. The alternating impulse voltage ceases to flow to the coil with the core 14 and the elastic steel plate 15 stops compressing the air hose 20, simulating the cessation of the pulse. The signal about the cessation of the pulse is perceived by the circuit of the control unit of the automatic tonometer and the process of measuring the air pressure in the cuff is started. The value of air pressure in the cuff is fixed in the memory of the control unit of the automatic blood pressure monitor, at which the pulse simulation ceased (upper pressure value).

The air pump in the control unit of the automatic blood pressure monitor continues to work for some time, creating excess pressure in the cuff, compressing the elastic cylinder 1 and causing the reed switch 7 to trip, the contacts of which, using the logic device 12, prepare the power supply circuit of the LEDs C9, C10, C11 for operation.

After the operation of the air pump in the control unit of the automatic blood pressure monitor and the opening of the valve that releases air from the cuff, the elastic cylinder 1 begins to expand. When it is unclenched, at the moment the reed switch 5 is activated, the logical device 12 reconnects the power supply unit 18 of the electromagnet 13 with the power source. An alternating impulse voltage again enters the coil with the core 14, and the elastic steel plate 15 again begins to periodically compress the air hose 20 of the automatic blood pressure monitor, simulating a pulse renewal.

Simulation of the pulse renewal is perceived by the circuit of the automatic tonometer control unit as reaching the lower value of the air pressure in the cuff. The value of this pressure is recorded in the memory of the control unit of the automatic blood pressure monitor. At the end of the measurement cycle, the automatic blood pressure monitor displays on its display the value of the upper, lower values of the air pressure in the cuff and the pulse rate (simulated by the frequency of the alternating pulse voltage). The pressure and heart rate values obtained on the display are compared - with the pressure values at which the reed switches 6 and 5 of the device should be triggered and which were obtained during the calibration of the device, as well as the value of the heart rate with the frequency of the alternating pulse voltage, the value of which was also recorded during the calibration of the device , and a conclusion is made about the serviceability (malfunction) of the automatic tonometer.

Consider the operation of logic device circuits, LEDs and an electromagnet. Logic device 12 consists of four relays P1, P2, P3, P4 and includes three light indicators 9 (C9), 10 (C10), 11 (C11).

When checking automatic tonometers - after the contacts of the reed switch G6 are closed, the relay P4 is activated and self-locking, the power supply to the electromagnet 13 is turned off, which simulates the termination of the pulse and the measurement process starts with an automatic tonometer.

The automatic blood pressure monitor air pump continues to increase cuff pressure. This causes further compression of the elastic cylinder 1 and the closing of the contacts of the reed switch G7, which causes the relay P3 to operate and self-blocking.

After reaching a certain value of the pressure in the cuff, which exceeds the value at which the contacts G7 are closed, air is released from the cuff of the automatic blood pressure monitor and the process of expanding the elastic cylinder 1 begins.

When contact G6 is closed, relay P2 is activated and self-locked, closing circuit C10.

When the contacts of the reed switch G5 are closed, relay P1 is activated and self-locked, resets relay P4 from self-locking, thereby turning on the power of electromagnet 13. This simulates a pulse renewal, which is recorded by the measurement circuit of the automatic tonometer control unit, which ends the measurement process and fixes the measured values on its display.

Claims (1)

Device for checking the health of tonometers, characterized in that it includes a thin-walled cylinder having a diameter close to the diameter of a person’s hand, made of spring steel, having a through cut along the side surface, parallel to the axis of the cylinder, and inside the cylinder, on each side of the cut two angular brackets are installed, one side of each bracket attached to the inner surface of the cylinder wall, a permanent magnet fixed on the other side of one bracket, and on the other side Three reed switches are fixed to the bracket, electrically connected to the logic device and three light indicators mounted on the board, there is also an electromagnet mounted on the board and consisting of a coil with a core, an elastic steel plate, made with the possibility of periodic attraction to a magnetic conductor with a semicircular groove, and a magnetic base, while the coil is electrically connected to an electromagnet power supply installed on the board, and the logic device is made with possible Stu control operation of LEDs and the electromagnet power supply.

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