WO2017069651A1

WO2017069651A1 - Cardioqvark cardio monitor

Info

Publication number: WO2017069651A1
Application number: PCT/RU2015/000776
Authority: WO
Inventors: Александр Викторович Ежков; Владислав Хэнрыкович БУТКЕВИЧ; Владимир Александрович УСАНОВ
Original assignee: Александр Викторович Ежков
Priority date: 2015-10-20
Filing date: 2015-11-13
Publication date: 2017-04-27

Abstract

The utility model relates to the field of medicine, in particular to devices for producing a cardiogram, and also to the field of accessories for mobile devices (mobile telephones, smart phones, a pocket personal computer (communicator) having the functions of a mobile telephone, iPhone or any other device operating on a Windows, Android or iOS platform) and is directed towards increasing the accuracy of measurements, the reliability of the information received regarding cardiac activity, and providing the possibility of observing the signal of an electric cardiac pacemaker directly on the screen of the mobile device, and also towards increasing the validity and simplification of the design and avoiding unnecessary energy consumption on transmitting data wirelessly. Said technical result is achieved in a device for producing a cardiogram, said device being in the form of a housing casing for mobile devices, the housing casing containing electrical field sensors, each of which is connected to a differential amplifier and to a potentiometer controllable by a controller which is connected to a crypto-processor, a power source and to an analog to digital converter (ADC) and transmits information by a USB interface to the mobile device, wherein the ADC receives information from the differential amplifier.

Description

CARDIOQVARK CARDIOMONITOR

The invention relates to the field of medicine, in particular to devices for obtaining a cardiogram, as well as to the field of accessories for mobile devices (mobile phones, smartphones, a personal digital assistant (communicator) with the functions of a mobile phone, IPhone, or any other device running on the Windows platform , Android or iOS), and is designed to take a cardiogram using devices that have a USB interface.

The prior art protective cover of a mobile communication terminal, made with sensors for detecting biological signals on it, to allow the user to check his / her health. The case is made of plastic, installed on a mobile communication terminal and includes a sensor for detecting biological signals and a terminal. The connection terminal outputs a detected biological signal. The sensors may be: a body temperature sensor, an electrocardiogram sensor, a body fat detection sensor, and a pulse detection sensor. One or more sensors are installed on both sides and the upper and lower surfaces of the protective cover (KR 20080073571, 08/11/2008).

This device has a low bandwidth signal transmission, a large waste of energy on data transfer.

As the closest analogue of the claimed utility model, it is possible to take a device for monitoring a user's health state made in the form of a cover adapted for use with a mobile device. The case includes: (a) a memory unit, (b) a sensor unit on the surface of the case, (c) a set of sensors for measuring health parameters, built into the sensor unit for measuring raw health indicators of user data, (d) a processor that is activated from sleep mode based on user input, including contacting at least one sensor surface on the case for a predetermined period, and (e) a power supply unit for controlled supply of power to the sensors and the processor when user input is detected . The processor initializes and adjusts the sensors, and receives health parameter data from the sensors. The case further includes a unit communications for transmitting raw health metrics to the mobile device for processing. Measuring sensors for health parameters include a temperature sensor, electrocardiograms (ECG), and a sensor. measuring the level of oxygen in the blood (US 2015254414, 09/10/2015).

The disadvantages of the above device is the inability to obtain data on the bioelectric activity of the heart with high reliability of the digitization of the signal, which does not allow to obtain reliable information about the cardiac activity, and also does not make it possible to observe the signal of the pacemaker directly on the screen of the mobile device, in addition, this device has a large expenditure of energy to transfer data.

The technical result achieved by the implementation of this utility model is to increase the accuracy of measurements, the reliability of the received information about cardiac activity and to provide the ability to observe the signal of the pacemaker directly on the screen of a mobile device, as well as to increase reliability and simplify the design and avoid unnecessary waste of energy for data transmission via broadcast.

The specified technical result is achieved in a cardiogram device made in the form of a case-cover for mobile devices containing electric field sensors, each of which is connected to a differential amplifier and a potentiometer controlled by a controller connected to a cryptoprocessor, a power source, and an analog-to-digital converter ( ADC) and transmitting information via USB to a mobile device, while the ADC receives information from a differential amplifier.

The sensor is a capacitive electric field sensor.

The housing-case has a back wall, end walls and side walls or part of the side walls.

The ADC processes the signals arriving at it through a differential amplifier from the sensors, and digitizes the signals for transmission to the controller.

The case-cover is made with a loop connection for direct connection to the processor of the mobile device through the connector of the mobile device. Case-cover is made with elements of shielding and simultaneous grounding of the human body in the process of signal collection.

Shielding elements are metallization of the printed circuit board, on the one hand, and metal screens of sensors, on the other hand.

Sensor screens are solid metal casings that minimize the influence of surrounding signals that create interference, and allow you to use the human body as virtual ground to obtain the correct cardiogram recording scheme.

Case-cover is made of plastic.

The sensors are configured to remove the electric field from the fingers of a person’s hands.

The technical result can be obtained only by implementing the entire set of essential features characterizing the independent claim of the claimed utility model.

The essence of the utility model is illustrated by the drawing, where in FIG. 1 shows a functional diagram of a device for obtaining a cardiogram.

A device for receiving a cardiogram - a CardioQVARK cardiograph, is designed to take a cardiogram using mobile devices with a USB interface, and is an ADC module with two electric field sensors, enclosed in a plastic case-cover, namely in its back wall.

The cardiogram is removed using two sensors 1, 2 of the electric field. The sensors of the device remove the electric field of a person from the fingers of his hands. From them, the signal is fed to a differential amplifier, and then for processing in the ADC (information from the sensors is processed in the ADC software. Next, the ADC interacts with the upper level software, which is an application for a mobile device, for example, a smartphone, etc.). The digitized signal is fed to the controller. A potentiometer controlled by the controller is required to minimize the errors of both sensors. The crypto processor (cryptocontroller) provides legitimacy to work with Apple devices. From the controller, the information is transmitted via USB to a PC, iPhone or any other mobile device running on the platform of Windows, Android or iOS. The power supply is controlled by the controller. Input voltage 2.5 V it converts to a voltage of 3.3 V to power digital circuits, and, in addition, when the cardiograph is turned on, it generates a voltage of ± 3.3 V to power the analog part of the device.

Capacitive electric field sensors, rather than electrodes or metal plates, allow you to not use contact electrodes and other conductors.

The design of the claimed device additionally includes elements of shielding and simultaneous grounding of the human body in the process of signal collection, which leads to a clinically reliable result in domestic conditions.

The screening of the cardiograph is carried out using metallization of the printed circuit board, on the one hand, and metal screens of the sensors, on the other hand. Sensor screens are solid metal housings. They minimize the effects of surrounding interference signals. It is worth noting that the metal screens on the sensors allow you to use the human body as a virtual earth, i.e. The device implements the correct cardiogram removal scheme.

For the cardiograph to work, it is necessary to install the CardioQVARK program on the mobile device, equipped with a convenient interface. It allows you to easily remove the cardiogram yourself, without the help of medical staff. Just start the program and enter the cardiogram removal mode. Next, you need to put your fingers to the two sensors, while in order to minimize interference, it is desirable to press your elbows to the body. After starting recording, calibration will start first. Calibration time can be set by yourself. Then, the cardiogram removal mode will turn on directly, which takes from 3 to 5 minutes, this time is enough to accurately capture the impulses transmitted by the heart. The program (software) records the user's cardiogram in the I standard lead. Then the program will offer to send data to the server. On the server, the received data is calculated and returned to the user (via the Internet, return to the program). After processing the information, a result with data on cardiac activity, such as heart rate, uneven heartbeat, and power of high and low frequency spectra, is displayed on the screen of the mobile device heart rate and so on. Information is displayed in an accessible form in the form of heart rate graphs and 12 indicators of heart rate variability, in separate tabs of the program you can see the calculated data on disturbances in the normal rhythm due to extraordinary heart contractions, the ratio of inhibitory and exciting processes of regulation of the nervous system, the effect of hormonal regulation organism on the heart. It also assesses the effect of the nervous system on the heart, mobilization of internal resources, the body's ability to adapt to mental and physical stress. At the same time, there is always access to the data of previous studies in a special “Health Card”, which the program is equipped with. It contains all the information indicating the date and time the cardiogram was taken.

A distinctive feature of this cardiograph is real-time online monitoring: information is sent to the server, and then after its processing directly to the attending physician. Thus, the doctor can monitor the patient’s condition, even while being at a distance, and provide expert advice remotely. This may be especially true for those patients who are at a considerable distance from medical facilities and sometimes do not have the opportunity to quickly receive medical advice in person. In addition, contactless sensors are used in the cardiograph, due to which the cardiogram is removed in conditions that are comfortable for the patient, without the use of wires and clamps. To take a cardiogram with such an instrument, there is no need for special preparation of the patient. This makes it possible to significantly speed up and simplify the collection of results and the diagnosis of cardiovascular and a number of other diseases in order to prescribe a further course of treatment.

The technical effect of the claimed utility model is the transmission of data on the bioelectric activity of the heart through a connection via USB. The use of such a connection provides a direct connection to the processor of the mobile device and can significantly increase the throughput (device bandwidth: 0.05 Hz - 10 kHz.) Compared to using the Bluetooth wireless interface, due to which the device real-time transmission of the digitized signal with a frequency of 20 kHz, that is, the received cardiac signal has a sampling frequency of 20 kHz, 16 bits. Thanks to this connection, the device allows you to obtain data on the bioelectric activity of the heart with high reliability of the digitization of the signal. Having such a digitization accuracy of the signal, the device allows you to capture the pulses of pacemakers, and is also the first case-cover for mobile devices with such functionality. In addition, the use of a USB connection makes it possible to avoid unnecessary waste of energy transferring data over the air (direct addressing to the processor of a mobile device is less energy intensive) and to eliminate the need for a separate battery for powering the cardiograph. Low power consumption is achieved, including due to sleep mode. In turn, the digitization of data with a high frequency can significantly increase the reliability of the received information about cardiac activity, and also makes it possible to observe the signal of the pacemaker directly on the screen of the mobile device.

Claims

Utility Model Formula

1. A device for obtaining a cardiogram, characterized in that it is made in the form of a case-cover for mobile devices containing electric field sensors, each of which is connected to a differential amplifier and a potentiometer controlled by a controller associated with a crypto processor, a power source, an analog-to-digital converter (ADC) and transmitting information via USB to a mobile device, while the ADC receives information from a differential amplifier.

2. The device according to claim 1, characterized in that the sensor is a capacitive electric field sensor.

3. The device according to p. 1, characterized in that the housing has a back wall, end walls and side walls or part of the side walls.

4. The device according to claim 1, characterized in that the ADC processes the signals received through the differential amplifier from the sensors and digitizes the signals for transmission to the controller.

5. The device according to claim 1, characterized in that the case-cover is made with a loop connection for direct connection to the processor of the mobile device through the connector of the mobile device.

6. The device according to p. 5, characterized in that the housing-cover is made with elements of shielding and simultaneous grounding of the human body in the process of removing the signal.

7. The device according to claim 6, characterized in that the shielding elements are the metallization of the printed circuit board, on the one hand, and the metal screens of the sensors, on the other hand.

8. The device according to claim 7, characterized in that the screens of the sensors are solid metal casings that minimize the influence of surrounding signals that create interference, and allow you to use the human body as virtual ground to obtain the correct cardiogram recording scheme.

9. The device according to p. 6, characterized in that the housing is made of plastic.

10. The device according to p. 2, characterized in that the sensors are configured to remove the electric field from the fingers of a person’s hands.