RU81886U1 - VERIFICATION DEVICE FOR AUTOMATED Sphygmomanometers - Google Patents

Abstract

1. A calibration device for automated sphygmomanometers containing a source of pressure pulsation and a pressure regulator, while the outputs of the pressure pulsation source are connected to the input of the pressure regulator through the measuring and bypass hydraulic channels, the first measuring module, which is a cylinder with a pressure stabilization unit simulating a human hand, for attaching a compression cuff of one type of sphygmomanometer, in which an elastic tube that imitates the artery of a human hand is placed, and includes into the measuring channel, the working pressure and frequency standard included in the measuring channel, a control unit whose electrical inputs are connected to the outputs of the working pressure and frequency standard, and the outputs - with the inputs of the pressure pulsation source and pressure regulator, characterized in that it further comprises a second measuring module comprising a cylinder with a pressure stabilization unit simulating a human hand for attaching a compression cuff of another type of sphygmomanometer in which an elastic tube is placed, Mitirev artery of the human hand, and a measuring channel is included in series with the first measuring tube module. ! 2. The verification device for automated sphygmomanometers according to claim 1, characterized in that the pressure pulsation source comprises a pump and a flow pulsator, the first hydraulic output of which is the input of the measuring module, and the second hydraulic output is a bypass channel, and the pulsator input is hydraulically connected to the pump output whose hydraulic input is the output

Description

The utility model relates to instrumentation and is intended for metrological certification of automated sphygmomanometers.

A known installation for testing automatic and semi-automatic blood pressure and heart rate meters company "OMRON CORPORATION" (Recommendation, State system for ensuring the uniformity of measurement. Blood pressure and heart rate meters, automatic and semi-automatic OMRON and MARSHALL. Testing method MI 2582-2000, All-Russian scientific Research Institute of Optical and Physical Measurements (VNIIOFI) Gosstandart of Russia, M., 2000) - [1], which consists of a device for testing blood pressure meters, cuffs , Cylinders for compression cuffs simulator (ramp) the pressure pulsations in the compression cuff, rigid chambers, air blower, electronic components, pneumatic systems with special metallic and plastic fittings, tubes, plugs and adapters for connecting to a pneumatic device. The installation is characterized by the applicability of a limited number of types of devices, the presence of a methodological measurement error during verification associated with a forced departure from the simulation of the measurement process that actually occurs, and the impossibility of conducting a complete verification, in which the metrological characteristics of the measuring instrument, which are inherent to it as a whole, are determined. In this case, only elementwise verification is possible, which is carried out when complete verification is not feasible (RMG29-99, items 13.20 and 13.21. Recommendations on interstate

standardization, ICG. Metrology. Basic terms and definitions, IPK, Publishing house of standards, 2000) - [2].

The invention is known "Flow pulser" for metrological certification of blood pressure meters, containing a stator with output windows, which coaxially mounted removable cylindrical hollow rotor with output windows connected to the motor shaft. The invention provides for the creation in the fluid stream of flow pulsations with various laws of change (Patent RU No. 2237119, publ. 06/20/2008, Bull. No. 17) - [3]

The invention is known "Installation for verification of automated measuring instruments for blood pressure and pulse rate" (Patent RU No. 2210974, АВВ 5/02, publ. 08/27/03, Bull. No. 24) - [4], which contains a cylinder imitating a patient’s hand, for the compression cuff of the measuring instrument under verification, a working pressure standard, a pressure pulsation generator simulating a pulse frequency and containing a quartz frequency generator and an electromagnet, the rod of which is made with an emphasis in the elastic bottom of the cylinder to transmit pressure pulsations through the oil to the cuffs with the frequency given by the generator control unit, the air injection device and the elements of the pneumatic connection. Here, the pressure pulsations are transmitted to the compression cuff through the entire cylinder imitating the arm, while in the real process the pressure pulsations are transmitted only through the artery, and it is also necessary to disconnect the compression cuff from the calibrated measuring device to connect them through the connection element to the installation pneumatic system, whereas types of measuring instruments, the cuff is not structurally disconnected, and therefore, it is impossible to verify such a device on this installation.

The invention is known "Installation for the complete verification of blood pressure and heart rate" (Patent RU No. 2223031, AB 5/02, publ. 10.02.04, Bull. No. 4) - [5]. Installation contains

a source of blood pressure pulsations in the form of a cylinder of elastic material, a compression cuff of the instrument under test, a working pressure standard simulating a pulse rate, a control unit and a patient’s artery simulator in the form of an elastic tube rigidly connected to a cylinder and connected to an additional cylinder of elastic material. The compression cuff is worn on the tube and cylinder. The pressure pulsation regulator contains a quartz frequency generator and an electromagnet, the rod of which is in close contact with the bottom of the additional cylinder. The tube and cylinder are filled with liquid medium. The tube with its free end is connected to a chamber for damping pulsations (pressure stabilization unit) filled with a liquid medium.

The pressure pulsation regulator contains a quartz frequency generator and an electromagnet whose rod is in close contact with the elastic bottom of the additional hydraulic cylinder, which then passes into an elastic tube, which ends, in turn, with a pulsation damper. An electromagnet oscillates a rod, which, pushing the elastic bottom of the cylinder, transfers pulsations through the oil in the elastic tube to the compression cuff, thereby simulating the pulse rate. The cylinder is connected to a working pressure standard, which is a pressure differential pressure transducer (differential pressure gauge) with a tolerance range of ± 0.075% in the measurement range from 4 to 40 kPa (30-300 mmHg). The positive chamber of the differential pressure gauge is connected by a tube of the pneumatic system to the cylinder, and the negative chamber is connected to the atmosphere. The installation is controlled by a control unit assembled on the basis of a personal computer. The source information used during verification is entered into the control unit, signals from the working pressure standard are also received here, which are then processed, and commands for the electromagnet of the crystal oscillator are issued from here.

Closest to the claimed utility model and coinciding with it in purpose is the invention "Device for verification

automated sphygmomanometers ”(Patent RU No. 2301020, АВВ 5/02, G01L 27/00, publ. 06/20/07, Bull. No. 17) - [6]. A device for checking automated means of measuring blood pressure and heart rate contains a source of pressure pulsations, which contains a pump and a variable flow generator, one input of which is hydraulically connected to the pump, and the second input is electrically connected to the control unit. At the output of the variable flow generator, there are two rigid tubes forming the measuring and bypass channels. The measuring channel contains a sensor zone in the form of a flexible elastic tube imitating the artery of a human hand and located in the cavity of a cylinder imitating a human hand constituting the measuring module, and through a working pressure standard transmits a signal to the control unit and is hydraulically connected to the input of the pressure regulator. The device contains a pressure regulator hydraulically connected to the pump, a control unit whose outputs are electrically connected to the pump, pressure regulator, variable flow generator, and the inputs of the control unit are the outputs of the working pressure standard.

Measurement of systolic, diastolic pressure and heart rate is carried out by a sphygmomanometer on a cylinder imitating a human hand. The obtained values of the sphygmomanometer are compared with systolic, diastolic pressure and heart rate set from the control unit, the signals to which are received from the working pressure standard. Similarly, the measuring instrument is verified at several more points and a decision is made on its suitability or unsuitability for use.

However, this device can only be used for checking sphygmomanometers with a cuff on the shoulder.

The technical result, the claimed utility model is aimed at, is to expand the range of application of the calibration device as for automated verification

sphygmomanometers with a cuff on the shoulder, and for checking automated sphygmomanometers with a cuff on the wrist.

The technical result is achieved in that in a calibration device for automated sphygmomanometers containing a source of pressure pulsations and a pressure regulator, while the outputs of the pressure pulsation source are connected to the input of the pressure regulator through the measuring and bypass hydraulic channels, the first measuring module, which is a cylinder with a pressure stabilization unit imitating a human hand for attaching a compression cuff of one type of sphygmomanometer, in which an elastic tube is placed, imitating the artery of a human hand, and is included in the measuring channel, a working pressure and frequency standard included in the measuring channel, a control unit whose electrical inputs are connected to the outputs of the working pressure and frequency standard, and the outputs are connected to the inputs of the pressure pulsation source and pressure regulator, new is that it further comprises a second measuring module comprising a cylinder with a pressure stabilization unit simulating a human hand for attaching a compression cuff of another type of sphygmomanoma tra, in which is placed an elastic tube simulating the artery of a human hand, and is included in the measuring channel in series with the tube of the first measuring module.

The source of pressure pulsations contains a pump and a flow pulsator, the first hydraulic output of which is the input of the measuring module, and the second hydraulic output is a bypass channel, and the input of the pulsator is hydraulically connected to the pump output, the hydraulic input of which is the output of the pressure regulator.

The essence of the utility model is illustrated in the drawing, where:

1 - source of pressure pulsations;

2 - flow pulsator;

3 - pump;

4 - the first measuring module;

5 - second measuring module;

6 - the first cylinder imitating a human hand;

7 - the first tube simulating a human artery;

8 - working standard of pressure and frequency;

9 - the first block of pressure stabilization;

10 - control unit;

11 - pressure regulator;

12 - compression cuff on the shoulder;

13 - sphygmomanometer with a cuff on the shoulder;

14 - the second tube simulating the artery of a human hand;

15 - the second cylinder imitating a human hand;

16 - compression cuff on the wrist;

17 - sphygmomanometer with a cuff on the wrist;

18 - measuring channel;

19 - bypass channel;

20 is a second pressure stabilization unit.

The calibration device for automated sphygmomanometers contains a source of pressure pulsations 1, which includes a flow pulsator 2 and a pump 3, which are electrically connected to the control unit 10. At the output of the flow pulsator 2 there are two rigid tubes forming measuring 18 and bypass 19 channels. The measuring channel 18 contains two series-connected measuring modules 4 and 5, which are cylinders 6 and 15, on which compression cuffs 12 and 16 of the calibrated sphygmomanometers with cuffs are placed on the shoulder 13 and on the wrist 17, respectively, and in which flexible elastic tubes 7 and 14 imitating the artery of a human hand. The pressure stability in the first measuring module 4 is carried out by the pressure stabilization unit 9, in the second - by the pressure stabilization unit 20. The second measuring module 5 can be

located both in front of the first measuring module 4 and behind it. The pressure in the measuring channel 18 is controlled by a working pressure and frequency standard 8, which is a digital complex for measuring the pressure of the IPDC. Oscillation frequency control is carried out by a frequency meter. The readings of the working pressure standard and the frequency meter are sent to the control unit 10. The pressure regulator 11 serves to compensate for the pressure in the entire measuring system.

Verification device operates as follows.

The control unit 10 sets the control values of pressure and frequency. These parameters enter the pump 3 and the flow pulsator 2, respectively. The fluid flow from the pump 3 enters the flow pulsator [3] 2, which is a hollow cylinder with input and output windows, which, rotating with a frequency set from the control unit 10 equal to the heart rate, passes it through two rigid tubes forming a measuring and bypass 19 channels in which oscillations of the fluid flow are carried out in antiphase. Pressure pulsations from the flow pulsator 2 are perceived by the second elastic tube 14 simulating the artery of the human hand and located inside the cavity of the cylinder 15, which are received through the compression oil 16 in the cylinder simulating the human hand by the compression cuff 16 of the sphygmomanometer 17 with a cuff on the wrist. A pressure stabilization unit 20 is connected to the cylinder 15 to stably maintain pressure in the cylinder 15. Similarly, a sphygmomanometer 13 with a cuff on the shoulder can be calibrated. cylinder 6. In cylinder 6, stable pressure is maintained by pressure stabilization unit 9.

In addition to the calibrated sphygmomanometers 13, 17, the measured pressure and frequency are sensed by the working

a pressure and frequency standard 8, which processes the incoming measurement information and provides control signals to the control unit 10. Stable pressure in the entire system is maintained by the pressure regulator 11, which receives signals from the control unit 10.

Thus, a device is proposed in which the calibration of automated sphygmomanometers with cuffs on both the shoulder and wrist is carried out in full, while the solution to this device is simple in execution, simple and reliable in operation.

Claims (2)

1. A calibration device for automated sphygmomanometers containing a source of pressure pulsation and a pressure regulator, while the outputs of the pressure pulsation source are connected to the input of the pressure regulator through the measuring and bypass hydraulic channels, the first measuring module, which is a cylinder with a pressure stabilization unit simulating a human hand, for attaching a compression cuff of one type of sphygmomanometer, in which an elastic tube that imitates the artery of a human hand is placed, and includes into the measuring channel, the working pressure and frequency standard included in the measuring channel, a control unit whose electrical inputs are connected to the outputs of the working pressure and frequency standard, and the outputs - with the inputs of the pressure pulsation source and pressure regulator, characterized in that it further comprises a second measuring module comprising a cylinder with a pressure stabilization unit simulating a human hand for attaching a compression cuff of another type of sphygmomanometer in which an elastic tube is placed, Mitirev artery of the human hand, and a measuring channel is included in series with the first measuring tube module. 2. The verification device for automated sphygmomanometers according to claim 1, characterized in that the pressure pulsation source comprises a pump and a flow pulsator, the first hydraulic output of which is the input of the measuring module, and the second hydraulic output is a bypass channel, and the pulsator input is hydraulically connected to the pump output whose hydraulic input is the output of a pressure regulator.