Method of controlling cardio-pulmonary resuscitation and device for its realisation

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to means for performing cardio-pulmonary resuscitation of people. Device for control of cardio-pulmonary resuscitation contains ultrasound converter, unit of electrodes, connected via interface to processor, connected with display, memory unit, sound signaller, unit of light-diode signallers, unit of connection with central control panel unit of operation mode selection, unit of connection with the internet and, via USB interface, with unit of top level software. Device also contains colour television microcamera, connected via successively installed block of signal amplification and filtration and unit of processing and imposing alignment of images to additional processor input/output, illumination unit, pulse measurement unit, gas analyser, unit of microphones with matching unit, connected with processor and power supply unit. Pulse measurement unit and unit of electrodes are made with possibility of fixation on patient by means of fixation unit, with unit of microphones, controlled illumination unit and gas analyser being fixed on patient by means of additional fixation unit. Method of control contains stages of obtaining ultrasound echo signals and electrosignals, characterising blood flow in blood vessel, determination of blood flow characteristic by impedance of neck tissues in the process of performing cardio-pulmonary resuscitation, presentation of sound and visual information about patient/s condition. After that, current information about patient's condition is formed by television images and geometrical and colour characteristics of eye pupil and eye iris are determined, with estimation of colour and geometrical characteristics of blood vessels. Sound laryngeal signals, exhaled gas and patient's pulse are also read and analysed, light signals are used to signal about patient/s condition and patients condition is estimated basing on data of comparison of standard and current information.

EFFECT: application of invention makes it possible to extend functional possibilities, increase operation speed, immediacy and accuracy in performing cardiopulmonary resuscitation.

16 cl, 10 dwg

 

The invention relates to a device cardiopulmonary resuscitation of a human, allowing to monitor the patient. The scope covers the branch of medicine that can host resuscitation during treatment.

Well-known and widely used various devices and methods for monitoring cardiopulmonary resuscitation person[1, 2, 3].

The essential feature of these methods and devices is that you have a recorder, analyzer and indicator of respiratory noise.

The disadvantages of the known technical solutions in low precision (only registered respiratory noises) and complexity of use of devices (large size and weight, the difficulty or impossibility of placing on the patient); in addition, the known device can not control the pupil size of the patient and to analyze the composition of the exhaled gas.

As a prototype of the selected device for cardiopulmonary resuscitation [4]. This known device comprises an electrode Assembly and an ultrasonic transducer placed on the patient using the mount unit, and the interface and the processor, measuring vascular blood flow based on the Doppler method and controlling the operation of the sensor.

The disadvantage of this device is the lack of the following possibilities:

- sound instruction reanimiruya face when performing cardiopulmonary resuscitation (CPR);

- monitoring the effectiveness of chest compressions and artificial respiration;

- automated decisions on the patient's condition;

- task lighting the notice of the patient's condition;

- low performance and accuracy assessment of the patient's condition;

- mobility (portability, compactness);

- the connection with the Internet;

- continuity of supply.

Thus, it is obvious that there is a need for improved methods, devices and systems, providing fast and high quality control, cardiopulmonary resuscitation.

The purpose of the invention (technical result) - increase functionality, speed, efficiency, precision devices, controllability CPR CPR and safety.

This object is achieved in that the device for monitoring cardiopulmonary resuscitation containing the ultrasonic transducer, the electrode Assembly is connected via an interface to the processor associated with the display and memory unit, an audible alarm, the unit led annunciators, communication unit with a Central control unit, the block selection mode, the communication unit with the Internet and, through the USB interface unit software� top level color television microcamera connected via a series established the power amplification and filtering of the signal and the unit of processing and combining images to additional input/output processor, the illumination unit, the unit of measurement pulse, the detector, the microphone unit with matching unit, connected to the processor and the power supply unit, wherein the unit of measurement pulse and the unit electrodes made with the possibility of fixing on the patient via the mount unit and the microphone unit, controlled illumination unit and the sensor made with the possibility of fixing on the patient by means of an additional unit of attachment.

In addition, the microphone unit includes at least six microphones and placed in the larynx and in the projection of bifocal carotid arteries of the patient.

In addition, the gas analyzer in the form of a half-mask.

In addition, the block selection mode is a keyboard.

In addition, the memory unit is a flash storage data.

In addition, the communication unit from the Central control unit is made in the form of a transceiver.

In addition, the communication unit with the Internet is a network adapter.

In addition, the power supply contains a battery and a solar panel.

Method of control of cardiopulmonary resuscitation with the use of the above devices, including p�radiation of ultrasonic echo signals and electrical signals, characterizing blood flow in a blood vessel, determining characteristics of blood flow on the impedance of the tissues of the neck during cardiopulmonary resuscitation, display audio and visual information about the patient's condition, further form the current information about the patient's condition, why shoot a colored television image and determine the geometric and color characteristics of the pupil and iris, appreciating the color and geometric characteristics of the blood vessels, remove and analyze a guttural sound signals, remove and analyze the exhaled gas and the patient's pulse, signal lights on the patient's condition and assess the condition of the patient based on the comparison of the reference data and the current information.

In addition, the analysis of color television images is carried out by combining the current and reference images in scale, color, the selection of informative features in the form of contours of lines, points, constantly-observed and changing of parts, the colors and brightness.

In addition, when analyzing geometric characteristics of the pupil is determined by the diameter of the pupil.

In addition, the patient's eye is illuminated with controlled lighting.

In addition, the analysis of the exhaled gas is determined by its chemical composition.

In addition, the analysis of sound C�nals is performed at frequencies of 20-180 and 260-680 Hz.

In addition, analysis of the impedance of the tissues of the neck is performed by assessing its characteristics such as capacitance, resistance and their attitude. In addition, the measured amplitude and pulse rate.

A method and apparatus is illustrated by the following diagrams and pictures:

Fig 1. Block diagram of the device.

Fig 2. Block diagram of the processor.

Fig 3. The block diagram of the device software.

Fig 4. A block diagram of the tracking reanimiruet patient.

Fig 5. The temporal sequence of cardiopulmonary resuscitation (CPR).

Fig 6. Schematic representation of the averaged functions of the noise of blood flow, characteristic of the early resuscitation carried out correctly.

Fig 7. Schematic representation of the averaged functions of the noise of blood flow (for resuscitation events with errors (animator makes too big a pause between successive compressions, can't keep time)).

Fig 8. Schematic diagram of the noise of blood flow during ventricular fibrillation.

Fig 9. The image of the eye, the plane of which is orthogonal to the camera direction.

Fig 10. The image of the eye, the plane of which is at an angle to the direction of the camera.

Fig. 1 shows a block diagram of the device.

Fig. 1 given the following notation:

1 - the object (patient);

2 - ultrasonic changes�Atwater;

3 - interface;

4 - CPU;

5 - the block of electrodes;

6 - mount unit;

7 - microphone unit;

8 - unit coordination;

9 - additional attachment unit;

10 - controlled illumination unit;

11 - gas analyzer;

12 - color television camera;

13 - power amplification and filtering of the signal;

14 - unit processing and combining images;

15 - display;

16 - sounder;

17 - Flash drive data;

18 - block led annunciators;

19 - block mode selection;

20 - USB interface;

21 - block software top level;

22, the communication unit of the Internet;

23, the communication unit with a Central control;

24 - the unit of measurement of the pulse;

25 - universal power adapter.

Fig. shows the following relationships:

The operation of the method consider the example of the device (Fig. 1).

The device operates as follows. On the object (the patient) 1 is housed and fixed electrodes 9, the microphone unit 7, the unit of measurement of the pulse 24, controlled illumination unit 10, a detector 11 and the color television the microcamera 12. In this case, the microphone unit 7, a controllable illumination unit 10 and the detector 11 are secured to the patient using an optional mount unit 9, and the unit of measurement of pulse 24 and the block e�of extradev 5 are secured to the patient 1 via the mount unit 6. By using the microphone unit 7 noise is removed in the blood vessels to the bifurcation of the carotid arteries or the noise of the air passage in the respiratory tract), and using a gas analyzer 11 analyzes exhaled (allocated) gas object (patient) 1. The unit of measurement of pulse 24 are removed signals proportional to the amplitude and the pulse rate of the object (the patient) 1. The signals from the detector 11, the unit of measurement of the pulse 24 is received for further processing in the processor 4, which also receives a signal from the matching unit 8 connected to the microphone unit 7. The color television camera 12 shoots color television image of the eye (pupil and iris) of the object (the patient) 1. To create a uniform and high-quality lighting the eyes of the subject (patient) 1 uses controlled illumination unit 10 which is controlled from the processor 4. Controlled illumination unit 10 generates a constant light or variable lighting (ring circumference) of the eye. Signals from the color television camera 12 are amplified, processed and transmitted power amplification and filtering of the signal 13 to the processing unit and the combination of images 14 that provides a selection of informative features image forming outlines, points, segments) and the combination of the compared images on angles of roll, pitch, scale and relatively�very specific pivot in the plane of the image reading eyes color television camera 12. The signals from the processing unit and the combination of images 14 is fed to the processor 4. With the help of the ultrasonic transducer 2 and the block electrode 5 are formed and read signals of the electrocardiogram (ECG) of the object (patient) 1, which is transferred via the interface 3 to the processor 4, focussing on the analysis of the object (the patient) 1. Block software top level 21 USB 20 recording a program of the processor 4. Selection of the mode of operation of the processor 4 is implemented by the block selection mode 19 (e.g., keyboard). Information about the state of the object (patient) 1 signalled by a light block, led annunciators 18) and sound (audible alarm 16). All the necessary information from the processor 4 is transmitted to the Internet through the communication unit with the Internet 21. In addition, the status of the object (patient) 1 is displayed on the display 15 and is transmitted through the communication unit with the Central control unit 23 to the Central control panel. Reference information (reference image, the reference noise and sound signals (ECG signals bifurcation in the carotid arteries, the signals of the air passage in the respiratory tract, the amplitude and frequency of the pulse, the composition of exhaled (allocated) air) is recorded in the memory unit 17 and is then used in the operation of the device. To give�ing uninterrupted power supplied universal power supply 25, consisting of battery and solar battery. This one cycle of operation of the device ends.

Fig. 2 shows the block diagram of the processor 4.

Fig. 2 given the following notation:

26 is a unit for identifying informative features of the image;

27 - unit identification image;

28 - digital selective filter;

29 - identification unit beeps;

30 - intelligent decision block;

31 - system software module.

The CPU 4 operates as follows. Processing and image recognition unit is carried out the selection of informative features images 26 and the block identification images 27. The recognition of audio signals and the ECG is provided by the identification block of audio signals 29 using advanced signal processing digital selective filter 28. Communication with external units of the processor 4 is made through the system software module 31, which can be reprogrammed.

Purpose and description of external blocks:

1) Flash storage for removable storage media MicroSDFlash 4 GB. For storing and providing access to archived data of the scanned image of the iris and the processed sound.

2) Colour TV micro camera (CCD sensor - part no cam8000-U Module is a child module digital�type camera 1.3 megapixels and frame rates up to 20 fps, USB 2.0 interface, dimensions 30×50 mm. is Designed to scan the image in color format with resolution of at least 720 lines *576 columns, with subsequent transfer of data in digital form to the microprocessor 4.

3) Automatic gain control is required for pre-processing of the signal from the CCD sensor and the compensation signal at short-term or permanent loss of the background illumination of the scanned image.

4) push Button switch - two-position switch used to select the mode of operation of the device depending on the number of people conducting resuscitation (1 or 2 rescuer).

5) Illumination of the scanned image - led white light used to illuminate the area of the eye and check pupillary reflex reanimatolog to assess the adequacy of provision of intensive care benefits.

6) Microphone (6 channels) - shumozaschitny microphone WM155A103 with frequency range 20-16000 Hz, sensitivity 58 dB. 2 channels in the larynx(2 microphones), 2 in the area of bifurcations of the carotid arteries (2 microphones). The size of not more than 9.7*5 mm.

7) Buffer matching and signal amplification is intended to harmonize and amplify the audio signals of the microphones.

8) USB interface is used to link the device with special software ver�. Provides high speed data exchange (read/write) in accordance with the USB 2.0 specification.

9) Audible and led alarms events - LEDs (white, red, green, and yellow) of illumination and miniature speaker for implementing the user interface with the possibility of timely light and sound alerts about device, recommended manipulations during resuscitation and directly on the patient's condition.

10) the Device information display - two-line LCD display, dimensions 50.6×31 mm, designed to implement the user interface with the ability recommended the timely manipulation during resuscitation and information about the patient's condition.

11) power supply - battery power source (charger) - rechargeable lithium battery Li-ion3,7B 1020 mAH. The choice of battery is made with the expectation of continuous operation for 1 hour without recharging, which meets the requirements of the recommended time resuscitation for 30 minutes. Additionally supplied with a uniform conversion unit AC to DC voltage of 5 V, a current of 350 mA, 50 to 60 Hz, which is designed to operate and charge internal battery source Pete�tion from the mains AC voltage of 220 V. Additionally provided with a solar battery. In addition, the power supply adapted for operation from a power bots on every car.

Fig. 3 gives the block diagram of the software of the device, which comprises the following steps:

32 - device;

33 - obtaining data from the acoustic sensors;

34 - processing of acoustic signals;

35 - comparison of frequency responses obtained at different time intervals;

36 - change the frequency response in a positive way;

37 - the output on the LCD display;

38 - shot eyes from the camera to the device;

39 - processing of the video image;

40 - determination of pupil diameter and characteristics of the iris;

41 - determination of dynamic changes of pupil diameter at different time intervals;

42 - change of the pupil diameter;

43 o icons on LCD display.

Fig. 4 shows a block diagram of the tracking reanimiruet patient. The flowchart comprises the following steps:

32 - device;

44 - the presence of amplitude and frequency of the pulse;

45 - independent rate and breathing;

46 - the absence of blood flow in the arteries and air flow in the larynx;

47 - the presence of blood flow in the arteries and air flow in the larynx;

48 - blinking white led;

49 - the green led is blinking;

50 - flashing red light�iodine;

51 - blinking yellow led.

Device software

Device software analyzes data received from transducers (acoustic transducers, bioimpedance sensors, video camera) attached in certain areas of the patient's body when the fixation device. A block diagram of the software components presented in figure 3.

Acoustic sensors are required to track, noises in the area of the larynx and the bifurcation of the carotid arteries during resuscitation, as well as measuring the characteristics of the pulse. The signal received from the sensors is analyzed by software of the microcontroller device, calculation and comparison of the amplitude-frequency characteristic (AFC) in different time periods and, as a result of the emergence of positive dynamics (vascular noise in places bifurcation of the carotid arteries or the noise of the air passage in the respiratory tract, their increase, as well as the appearance of the pulse), the software displays on the liquid crystal display device corresponding to the icon.

Using a real-time camera capturing images of the eyeball reanimiruet patient. With the help of binarization algorithms and pattern recognition is measured pupil diameter of the patient and, in the case of positive dynamics, vyv�converges on the LCD display of the device icon, characteristics which indicate that there was a positive trend of pupil diameter reanimiruet patient (there was a constriction of the pupil). Algorithm, the tracking reanimiruet the patient shown in figure 4.

Also the software of the microcontroller device realizes the function of status indication reanimiruet patient during a CPR procedure:

1. If stable fixed current passage of air through the larynx and the blood flow through the carotid arteries, then led the group in the device will blink the green led.

2. If fixed, or the passage of only the current of air through the larynx, or only after the passage of the blood flow through the carotid arteries, on the led panel will flash the yellow led.

3. If is fixed and complete lack of blood flow in carotid arteries and a current of air through the larynx, on the led panel will blink the red led.

4. Whenever the presence of the pulse of a patient on the led panel will flash a white led.

Also, the software of the microcontroller of the device provides control of the course of resuscitation:

1. The red led sets the rhythm of performing chest compressions for indirect massage of the chest (for example, 100 compressions per minute).

2. Blue gives off�drove to the beginning of procedure of artificial lung ventilation (e.g., 1 signal 20 compressions).

3. Yellow indicates a pause during CPR required for self-control heartbeat and breathing.

4. White indicates the presence of the pulse of a patient.

Consider a General method of noise control of blood flow, implemented in the present invention. Before you start cardio-pulmonary resuscitation (CPR), blood flow in the carotid arteries is absent or very weak, and consequently, the noise level of blood flow is absent or low.

We denote the initial noise level N0blood flow. During CPR, the device captures the values of the noise Ni. If the value of Nimore than N0That CPR had a positive effect. As the ratio of Nito Ni-1and N0determined the dynamics of the noise of blood flow, which restored the presence and dynamics of blood flow in the carotid arteries.

The process of resuscitation of a person can be represented as a sequence (see Fig. 5):

1) T0- the point in time at which reanimiruyet staff fixed the device on the patient;

2) Tp- the time of the actual start of resuscitation;

3) TCPRthe time interval of events CPR, consisting of two consecutive intervals TNMSand TIVL;

4) TKP- the time interval of the control pause CPR.

For a temporary interim�OK (T 0, Tpstaff has no time to start CPR, but the device is already collects information about the noise of blood flow, which in the future will be considered as the starting point.

Since the time Tpthe staff performs chest compressions (CPR) during the time interval TNMS. During this time, the device with a certain frequency gets information about the noise of blood flow. Proceeding from the process of CPR, it is obvious that the noise level should be considerably higher starting point and have a pseudo-rhythmic character.

At the expiration of the time interval TNMSthe staff proceeds to artificial lung ventilation, which holds for the time TIVLand then makes the control pause briefly TKPto assess the success of activities of the CPR. Similarly, the device during the pause determines the level of self noise of blood flow, which, if successful, should be significantly different in a big way from the noise point of reference.

During the entire time events CPR device N times per second with 6 sensors that detect the noise level of blood flow. Denote the obtained data of the i-step measurement-ri=(Pi1Pi2Pi3Pi4) From four values obtained from different sensors is formed by three values:

- the minimum of the i-step;

- the maximum of the i-step;

is the mean of the i-step.

Thus, during the entire period of the CPR device is formed of three discrete functions: Pmin(t), Pmax(t), Pavg(t) dynamics are directly

proportional to the dynamics of blood flow in carotid arteries reanimiruet. Based on the ratio of these functions and their derivatives in time, will recover the function of the dynamics of blood flow.

Consider the schematic graphs of the functions Pavg(t) it is possible to remove the evidence and situations.

The device performs, for example, 10 measurements per second, therefore, the functions of the noise of blood flow are discrete in nature, in increments of the abscissa 100 milliseconds. Fig. 6 shows schematically a graph of average noise functions of the bloodstream. This chart shows that until time of 0.1 seconds resuscitation has not yet started. The characteristic form of the function reflects the process of resuscitation. Staff need to perform chest compressions at a fixed time with a frequency of 100 compressions in 60 seconds. Therefore, since the interval between compressions 0.6 seconds, we will be on the graph to observe the pseudo periodic function, maxima and mi�imany which appear with a certain period.

The method allows to control the correctness of ongoing resuscitation. For this purpose, the device first determines the start time of resuscitation, as the maximum time derivative of the noise function of blood flow (the beginning of resuscitation - the first and usually the most abrupt transition from absent noise to the maximum level). Then, determining the period of occurrence of maxima and minima of the noise of blood flow corresponding to the beginning of chest compressions by the rescuer (this period corresponds to the period of occurrence of local maxima and minima of a function of blood flow I. the highs of its derivative), the device will determine the rate of resuscitation. Based on the ratio of the levels of local maxima and minima to the basic noise level (the noise level before the start of resuscitation), it is possible to conclude on the effectiveness of chest compressions.

Fig. 7, 8 schematically shows the functions of the noise of blood flow corresponding to the correct life support and ongoing errors. Obviously, using this method, the device is easy to identify situations when CPR is performed error. For example, knowing the correct period and comparing it with the period of highs ongoing CPR, the device will detect the error and display not�required instructions. Similarly, if the rate of chest compressions is insufficient, the device will detect it and inform the staff.

To conclude on the success of the activities of CPR and to determine whether the target is achieved CPR (renewal independent of heart rate and breathing) conducting activities staff CPR suspends for a time the control pause TKP.

The device, which determined the time the event starts CPR automatically "knows" the time interval events CPR, and after its expiry evaluates the success of CPR, based on the period of occurrence of local maxima and minima ratios and levels of local maxima and minima to the levels of highs and lows during CPR, and also to the base noise level.

There are several possible policy options. In case of unsuccessful events CPR heartbeat is missing or there is fibrillation of the heart. In the absence of heart rate, levels of local highs and lows will be well below such levels during CPR, and will be virtually indistinguishable from each other, close to the base level of the noise to the intensive care unit. In the case of ventricular fibrillation, the highs and the lows will be visible and aperiodic, also close to the base level of the noise to the intensive care unit. Fig. 8 shows a schematic graph of the noise of blood flow in SL�tea fibrillation.

In case of successful events CPR when the heartbeat is restored, the method allows to determine the heart rate because the local minima and maxima are clearly observed, the period of the heartbeat and the character is easy to calculate.

Control airflow in the upper respiratory tract noise analysis of respiration in the larynx

The method allows to determine correctly whether carried out an artificial lung ventilation, and also to define, whether was restored spontaneous breathing.

Consider the General principle of the method of control of a current of air. Before you start cardio-pulmonary resuscitation (CPR), the flowing air in the upper respiratory tract is absent or very weak, and consequently, the noise level of breathing is absent or low. We denote the initial noise level N0breathing. During mechanical ventilation, the device records the noise values Ni. If the value of Nimore than N0IVL had a positive effect. As the ratio of Ntto Ni-1and to N0determined the dynamics of the noises of the breathing, which restored the presence and dynamics of airflow in the upper respiratory tract.

The process of resuscitation of a person, as was discussed earlier, can be represented in the following time sequence:

1) To- the point in time at which reanimiruyet staff fixed the device on the pats�mobile;

2) Tp- the time of the actual start of resuscitation;

3) TCPR- the time interval events CPR, consisting of two consecutive intervals TNMSand TIVL;

4) TKP- the time interval of the control pause CPR.

For the time interval (T0, Tpstaff has no time to start CPR, however, the device gathers information about the breathing noises, which in the future will be considered as the starting point.

Since the time Tpthe staff conducts CPR, and then measures the ventilator during the time interval TIVL. During this time, the device with a certain frequency gets information about the noise of breathing. Based on the process of ventilation during CPR, it is obvious that the noise level should be considerably higher starting point and have a pseudo-rhythmic character.

At the expiration of the time interval TIVLthe staff makes the control pause briefly TKPto assess the success of activities of the CPR. Similarly, the device during the pause determines the level of self noise of breathing, which, if successful, should be significantly different in a big way from the noise point of reference.

During the entire time events CPR device N times per second with 2 sensors, fixed�ing the noise of breathing. Denote the obtained data of the i-step measurements of ri=(Pi1Pi2) Obtained from the two values from different sensors are formed three values:

- the minimum of the i-step,

- the maximum of the i-step,

is the mean of the i-step.

Thus, during the entire period of the CPR device is formed of three discrete functions: Pmin(t), Pmax(t), Pavg(t) the dynamics of which is directly proportional to the dynamics of airflow in the upper respiratory tract reanimiruet. Based on the ratio of these functions and their derivatives in time, will recover the function of the dynamics of air flow.

The method allows to control the correctness of ongoing resuscitation. For this purpose, the device first determines the start time of resuscitation, as the first maximum of the derivative of the noise function of respiration (the beginning of resuscitation - the first and usually the most abrupt transition from absent noise to the maximum level). Since the device sets the rhythm of work reanimiruya staff, in fact, it can compare is whether the beginning of a ventilator breathing noises.

The start time on a ventilator functions noise of blood flow cannot be determined when the level of noise breathing in�else, that is possible if: - the IVL is performed incorrectly;

- there is an obstruction of the upper respiratory tract (URT) or a foreign body in the SDT;

- Ventilation is not performed by staff (ignored the signal of the device to the beginning IVL).

The method allows to determine the success of ventilation when spontaneous breathing is restored. In this case, during the control pause, the noise of breathing will be different from the base level of the noise to a ventilator.

The analysis of the dynamics of the condition of the pupil image of the eye

The device, using the built-in video camera with led light, N times per second gets to analyze the image of the eye reanimiruet. The image of the eye, the plane of which is orthogonal to the direction of the camera shown in Fig. 9. The image of the eye, the plane of which is at an angle to the direction of the camera shown in Fig. 10

Using the algorithms of segmentation, binarization, housewarranty, repeated down-shift, the image is prepared for analysis, which determines the area ASPoccupied by the pupil of the eye and area aradoccupied by the iris.

From Fig. 9, 10 shows that amatrices shape of the pupil and the iris (the camera gets the image that is a projection) depends on the angle between the plane of the eye and the camera. In the General case, the forms will be e�ipsy. The definition of the semiaxes of the ellipse, arbitrarily oriented in space according to its projection, may take a long time with limited computational capabilities. Also, there is the question of determining the dynamics of the geometric dimensions of the ellipse in the condition of possible vibrations of the camera and, as a consequence, the change of the projection angle, which will lead to the change of eccentricity (the ratio of the lengths of the semiaxes to each other).

In view of the foregoing, required value, which would be invariant under the scaling (zoom your camera to the eye), as well as on the change of the angle between the plane of the eye and the camera. This value is the square root of the square relationship of the pupil to the area of the iris.

Assume that in the absence of the dynamics of the pupil camera of the device has changed its position or scale so that all linear dimensions of the image has changed in k times, and because of the changing viewing angle eccentricityboth ellipses have changed n times;

Obviously, the eccentricity and linear dimensions of the pupil and the iris is changed to the same size, as they lie in the same plane.

Let the major and minor semiaxes of the pupil and the iris to change were (a0b0) and (A0In0) rela�esteno. The area of the ellipse is calculated by the formula S=π, where A and b - axis of the ellipse. Then the ratio of areas will be:

After the changes are major and minor semiaxes of the pupil and the iris will take the form (a0b0) and (A0In0):

Therefore, the square root of the relationship of the area of the pupil to the area of the iriswill desired value, the dynamics of which is directly connected with the dynamics of the pupil of the eye and does not depend on the distance from the camera to the image resolution of the camera and the zoom and angle.

Let the data received at the i-step measurements of Pi.As the ratio of Pito Pi-1and P0determined the dynamics of the pupil of the eye.

Negative dynamics of the pupil of the eye reanimiruet is no change or an increase in the diameter of the pupil, and consequentlyPositive dynamics is the reduction of pupil diameterevidence of restoration of blood supply to the brain, reducing hypoxia and, as a consequence, the appearance of the response of the pupil to light (pupillary reflex).

Advantages (differences) of the proposed method and device are known from is as follows:

1) monitoring the effectiveness of chest compressions;

2) monitoring the effectiveness of artificial respiration;

3) automatic tracking of pupil diameter and iris;

4) measurement of blood flow bioimpedance method and the characteristics (amplitude, frequency) of the pulse;

5) sound coaching reanimiruya face when performing CPR;

6) user interface for the transmission of visual information;

7) analysis of exhaled gas;

8) operational light notification in the patient's condition;

9) intelligent (automatic) decision on the patient's condition;

10) the information output on the display;

11) mobility (portability, compactness) of the device;

12) high speed and precision evaluation of patient status;

13) preprogrammable (through the use of programs high level and flash memory);

14) communication with the Internet;

15) continuity of supply (due to the use of the battery and solar panels);

16) connected to the Central control panel.

Thus, in comparison with the known, the expected method and apparatus have improved performance, providing fast and quality maintenance of cardiopulmonary resuscitation and ease of maintenance.

Sources of information

1. Patent RU 56156 U1. A device for recording respiratory sounds. Authors: Fu�E. G. man (RU), koryukina I. P. (RU), priority dated 10.10.2005.

2. Patent RU 66174 U1. Device recording and analysis of respiratory sounds. Authors: Filimonova N. N. (RU), al-Najjar Goman PhD A. (RU), priority of 10.04.2007.

3. Patent JP 2000176025 (A). System for measuring and analyzing cardiopulmonary resuscitation parameter with extenol defibrillator or defibrillator training. Applicant: LAERDAL MEDICAL (AS), priority of 27.06.2000.

4. Patent RU 2008123883 A. cardiopulmonary resuscitation controlled by measuring vascular blood flow. The authors of Five of Sherwin (US), Cohen-Solal Eric (US), conventional priority 17.11.2005 US 60/737,909.

1. Device for controlling cardiopulmonary resuscitation containing the ultrasonic transducer, the electrode Assembly is connected via an interface to the processor associated with the display and memory unit, an audible alarm, the unit led annunciators, communication unit with a Central control unit, the block selection mode, the communication unit with the Internet and, through the USB interface unit software top level, color television a microcamera connected via a series established the power amplification and filtering of the signal and the unit of processing and combining images to additional input/output processor, the illumination unit, the unit of measurement pulse, the detector, the microphone unit with matching unit, connected to the CPU and the PSU, PR� this unit of measurement pulse and the unit electrodes made with the possibility of fixing on the patient by means of a mounting block, and the microphone unit, controlled illumination unit and the sensor made with the possibility of fixing on the patient by means of an additional unit of attachment.

2. The device according to claim 1, characterized in that the microphone unit includes at least six microphones and placed in the larynx and in the projection of bifocal carotid arteries of the patient.

3. The device according to claim 1, characterized in that the detector is in the form of a half-mask.

4. The device according to claim 1, characterized in that the block selection mode is a keyboard.

5. The device according to claim 1, characterized in that the memory unit is a flash storage data.

6. The device according to claim 1, characterized in that the communication unit from the Central control unit is made in the form of a transceiver.

7. The device according to claim 1, characterized in that the communication unit with the Internet is a network adapter.

8. The device according to claim 1, characterized in that the power supply contains a battery and a solar panel.

9. Method of control of cardiopulmonary resuscitation with the use of the device according to claim 1, comprising receiving ultrasonic echo signals and electrical signals characterizing blood flow in a blood vessel, determining characteristics of blood flow on the impedance of the tissues of the neck during cardiopulmonary resuscitation, display audio and visual information about sostenibilita, next, form the current information about the patient's condition, why shoot a colored television image and determine the geometric and color characteristics of the pupil and iris, appreciating the color and geometric characteristics of the blood vessels, remove and analyze a guttural sound signals, remove and analyze the exhaled gas and the patient's pulse, signal lights on the patient's condition and assess the condition of the patient based on the comparison of the reference data and current information.

10. A method according to claim 9, characterized in that the analysis of color television images is carried out by combining the current and reference images in scale, color, the selection of informative features in the form of contours of lines, points, constantly observing and changing of parts, the colors and brightness.

11. A method according to claim 9, characterized in that the analysis of the geometric characteristics of the pupil is determined by the diameter of the pupil.

12. A method according to claim 9, characterized in that the patient's eye is illuminated with controlled lighting.

13. A method according to claim 9, characterized in that the analysis of the exhaled gas is determined by its chemical composition.

14. A method according to claim 1, characterized in that the analysis of audio signals is performed at frequencies of 20-180 and 260-680 Hz.

15. A method according to claim 9, characterized in that the analysis and�of pedance tissues of the neck is performed by evaluating these characteristics, as capacitance, resistance and their relationship.

16. A method according to claim 9, characterized in that the measured amplitude and frequency of the pulse.



 

Same patents:

FIELD: medicine.

SUBSTANCE: method for detecting the burn wound granulation readiness for autografting involves the granulation microcirculation by laser Doppler flowmetry to calculate an average microcirculation (M, p.u.). That is combined with combining a granulation microcirculation effectiveness index (MEI). If the MEI is more than 1.6, and M is more than 3 p.u. the reparative ability of the burn wound granulation is considered to be preserved, and the granulation appears to be ready for autodermoplasty. If MEI is less than 1.6 regardless of the value M, the reparative ability of the burn wound granulation is considered to be diminished, the wound requires additional wound cleansing and granulation incision.

EFFECT: method enables providing the higher diagnostic effectiveness of the reparative ability of the tissues, selecting the autodermoplasty time, reducing the rate of transplant rejections and cutting the treatment costs and reducing the length of staying in hospital.

3 ex

FIELD: medicine.

SUBSTANCE: microcirculation is assessed by laser Doppler flowmetry using combined functional tests - thermal postural leg test and thermal postural arm test. Both tests involve recording a microcirculation index. The derived data are saved. An average basic microcirculation from the 10th to 110th seconds is evaluated for the leg and arm tests according to the provided formulas. That is followed by calculating an average relative microcirculation Irel1 and Irel2 during the functional leg exposure according to the presented formulas. If any of the two values Irel1, Irel2 is below standard - Irel1<3.7; Irel2<3.5, the presence of microcirculatory disorders is stated in the person being tested.

EFFECT: method is accurate, simple, enables immediately detecting systemic microcirculatory disorders in the patients suffering carbohydrate metabolism disorders on the basis of available diagnostic tests and measured microcirculation parameters; using the combined functional tests involves most regulatory mechanisms that provides obtaining the reliable microcirculation information from the patients of this category.

2 cl, 2 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: triplex scanning of the interlobular artery of the upper kidney pole is performed in clinostasis, and then within the first minute in orthostasis. The acceleration time (Ta), the total time of the blood flow during one cardiac cycle (Tt) are measured, their ratio Ta/Tt in clinostasis and orthostasis is calculated. After that the acceleration time index (ATI) is calculated by the mathematical formula. If Ta/Tt is less than 0.09 and ATI is less than 0, early affection of the kidneys, accompanied by arteriovenous shunting, is diagnosed.

EFFECT: method makes it possible to identify the group of patients requiring prophylaxis or treatment and in this way prevent the development of complications, disability retirement and mortality.

1 dwg, 3 tbl, 4 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to ultrasonic diagnostics in orthopaedics and traumatology. An early postoperative period involves finding echo-producing structures in a lumen of deep tibial veins according to duplex compression angioscanning. The grey-scale real-time B-mode duplex angioscanning procedure is performed on the first postoperative day from an approach to a popliteal vein. The compression exposure is manual and covers a distal segment of the ankle. If observing a homogenous lumen of the popliteal vein that corresponds to norm, the absence of thrombotic structures in the popliteal vein directly and the absence of the thrombosis process in the distal segments of the deep tibial veins are diagnosed. Small, different-calibre echo-producing structures flowing with blood, having a maximum size up to 0.8-1.0 mm in the lumen of the popliteal vein, and accelerating in the proximal direction with the manual decompression of the distal segment of the ankle enable diagnosing the initial stage of thrombosis in the distal segments of the deep tibial veins.

EFFECT: technique enables the early postoperative diagnostics of the thrombosis in the distal segments of the deep tibial veins by detecting the marker signs of this process.

7 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: sciatic nerve structure is scanned by B-mode ultrasound at the level of sub-piriform cavity and distally towards its bifurcation to tibial and common peroneal nerves, at emission frequency up to 17 MHz. If observing any signs of sciatic neuropathy at the level of sub-piriform cavity in the form of non-uniform thickness, which varies within the range of 0.2 to 0.4 cm, whereas it reaches 0.5 cm and more in the distal direction, the piriforms syndrome is diagnosed.

EFFECT: technique enables the higher diagnostic accuracy of the piriforms syndrome by detecting the morphostructural changes of the sciatic nerve from the level of the piriform space up to its bifurcation.

4 ex

FIELD: medicine.

SUBSTANCE: microvasculature is assessed by continuous-wave Doppler ultrasound. The Minimax-Doppler K apparatus measures linear blood flow velocities initially and with functional test of reactive hyperaemia, and a percentage of a peak coetaneous blood flow gain and an arteriolar blood flow reduction. That is followed by assessing the functional state of vegetative regulation of the cardiac rhythm by isolating 3 degrees of severity of cardiovascular neuropathy. A mild degree is shown by the peak coetaneous blood flow gain of less than 10%, the 8-minute arteriolar blood flow reduction of less than 15%. A moderate degree of severity is accompanied by the peak coetaneous blood flow gain of more than 10%, and the 8-minute arteriolar blood flow reduction of less than 15%. Severe cardiovascular neuropathy is stated if observing the peak coetaneous blood flow gain of less than 10%, the 8-minute arteriolar blood flow reduction of less than 15%.

EFFECT: technique enables early diagnosing of diabetic cardiac neuropathy, assessing its severity for the purpose of determining the therapeutic approach and working capacity examination.

3 ex, 1 dwg

FIELD: medicine.

SUBSTANCE: method involves pre- and post-test Doppler velocimetry of uterine vessels. The test involves an intravaginal pneumatic vibromassage. It is performed in a pulse mode, at frequency 5 - 25 Hz, duration of pulse train 3 - 4 seconds and pause 2 seconds for 5 minutes. The pre- and post-test blood flow reduction testifies to decreasing compensation abilities of the uterine vessel wall.

EFFECT: method enables detecting the patients in need of additional preconception period, including those preceding the supplementary reproductive technologies.

1 ex

FIELD: physics.

SUBSTANCE: imaging system comprises an ultrasound probe, operating at an ultrasonic Doppler transmission frequency f0, a Doppler demodulator which produces Doppler shift signals from the velocity of blood flow in an audio frequency band, a Doppler information display, an audio Doppler system, responsive to the Doppler shift signals, which produces a pitch-shifted Doppler audio signal without changing the displayed blood flow velocity. A Doppler audio system is responsive to a user control device in order to shift the pitch of Doppler-shifted signals by a fraction or whole number of cycles in order to maintain the tone quality of Doppler audio signals.

EFFECT: use of the invention expands the frequency range within an audio frequency band so that blood flow nuances are accurately maintained and reproduced.

11 cl, 4 dwg

FIELD: medicine.

SUBSTANCE: rheofallography is performed to determine the cavernous blood filling and venous outflow intensities; psychological testing is carried out to determine mental stress and asthenic syndrome. A discriminatory function F is calculated, and the derived result is compared to a constant, and if F is more than the constant, the absence of erectile dysfunction is diagnosed, while if F is less or equal to the constant, the erectile dysfunction is diagnosed.

EFFECT: technique enables diagnosing erectile dysfunction in the patients having the vibration contact by assessing the physiological and psychological values.

1 tbl, 3 ex

FIELD: medicine.

SUBSTANCE: colour Duplex ultrasonography of the vertebral artery is performed. The vertebral artery is imaged in the third and fourth segments. A time-average blood peak flow in the third segment TAMXv3 and a time-average blood peak flow in the fourth segment TAMXv4 are determined. An irritation coefficient Cir is determined by formula: Cir=TAMXv4:TAMXv3. If the value Cir is equal to 0.75 and less, the pronounced irritation is diagnosed, while the value falling within the range of 0.76 to 1.09 shows the moderate irritation, and the irritation is diagnosed to be absent if observing the value falling within the range of 1.1 and more.

EFFECT: technique enables providing greater reliability and accuracy by the qualitative assessment of the irritation.

2 ex

FIELD: medicine.

SUBSTANCE: method provides blood serum analysis by a bipolar method for multi-frequency impedancemetry to determine impedance modulus (|Z|) and phase angle (φ) at AC low-intensity frequencies 20, 98, 1000, 5000, 10,000, and 20,000 Hz by means of hardware-software complex provided with BIA-lab Compositum software; measurements are taken in a microchamber of 50 mcl; the software automatically calculate the blood serum concentrations of total protein, glucose, chlorides and bivalent ions on the ground of solution of assembled mathematical equations; the result is displayed and can be printed.

EFFECT: higher diagnostic effectiveness by eliminating the need for using chemical agents, reducing the time for analysis, cutting the cost and extending the indications for using the technique.

3 ex

FIELD: medicine.

SUBSTANCE: method consists in diagnosing chronic cardiac failure. The diagnostic procedure involves using the high-frequency electrical impedance analysis. Bipolar measurements of electrical impedance of the chest involve recording average modular impedance |Z| and phase angle φ, and calculating the relation |Z|/|φ|. The measurements taken involve probing with AC current at frequencies 50, 100, 200 and 500 kHz. That implies using electrocardiographic electrodes 21 mm in diameter. The first electrode is placed in the 3rd intercostal space along the left parasternal line. The second one is placed series in three positions. For the first time, the second electrode is placed in the 2nd intercostal space along the left sternal line, lead 3-2. Then, in the 3rd intercostal space along the right parasternal line, lead 3-3. Thereafter in the 5th or 6th intercostals space on the left in a projection of apex beat, lead 3-5. Decreasing angle φ modulus at frequency 200 kHz in lead 3-2 less than 34°, and/or increasing the relation |Z|/|φ| measured at frequency 200 kHz in lead 3-3 more than 15, and/or decreasing the relation |Z|/|φ| measured at frequency 200 kHz in lead 3-5 less than 10 enable diagnosing chronic cardiac failure.

EFFECT: method increases the diagnostic accuracy ensured by measuring combined with recording the above parameters.

4 ex

FIELD: medicine.

SUBSTANCE: method involves measuring an electric potential, performing the mechanical processing of involves dental tissues, and therapeutic treatment. The electric potential is measured in any of acupuncture points (AP) found on the face and connected to the involved teeth. The mechanical processing is performed with using an excavation burr. The electric potential is measured in the acupuncture points throughout the whole mechanical processing of the teeth every 5 seconds. If observing a drastic fall of the electric potential by more than 5 mV has the therapeutic effect on the teeth by terminating the mechanical processing of the teeth and continuing it at a lower rpm.

EFFECT: method provides the higher clinical effectiveness by reducing the pain sense in the patient by controlling the electric potential measurement continuously in one of any acupuncture points found on the face and connected to the involved teeth.

4 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, namely to paediatrics, and can be used to control an amount of breast milk consumed by a nursing infant. The method involves measuring a breast electric resistance and a breast electric capacity before and after breastfeeding. The derived values are multiplied to obtain the characteristics variation information during the breastfeeding. The change information are related to the amount of milk consumed by the infant. What is presented is a breastfeeding control system, which comprises an electric capacity measuring unit designed for measuring the electric capacity variations before and after breastfeeding. Besides, the system comprises a breast electric resistance measuring unit. Also, the system comprises a processing unit configured to calculate the product of the electric capacity and the electric resistance, and to match the derived product with the amount of milk consumed by the nursing infant.

EFFECT: inventions enables controlling the amount of breast milk consumed by the infant and assessing the adequacy of breastfeeding.

16 cl, 20 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: method involves preliminary assessment of the reversible abnormal changes of enamel accompanying early cariosity. That is ensured by diagnostic tests of solid dental tissues conducted by using light-induced fluorescence and electrometric measurement techniques followed by therapy involving daily applications of the Radogel-GABA preparation. If observing visually detected changes with a current intensity of 0.21-1.99 mcA in the lesion and the presence of fluorescence, the preclinical changes of enamel are diagnosed requiring 5 therapeutic procedures with the above preparation. Visualised tarnishing of enamel accompanied by a current intensity of 2.00-3.99 mcA in the lesion and the presence of fluorescence, an early carious change of enamel at the stage of a dead spot is diagnosed, and 7 therapeutic procedures are conducted. If visualising a white spot of enamel accompanied by a current intensity of 4.00-5.99 mcA in the lesion and the presence of fluorescence, an early carious change of enamel at the stage of a white spot is diagnosed, and 10 therapeutic procedures are conducted. If visualising a white spot of enamel accompanied by a current intensity of 6.00-7.99 mcA in the lesion and the presence of fluorescence, an early carious change of enamel at the stage of an intense white spot is diagnosed, and 15 therapeutic procedures with the Radogel-GABA preparation are required.

EFFECT: method provides the high-effective therapeutic exposure on caries by the timely recovery of the protein dental matrix with simplicity and ease of use at massive dental visits.

2 tbl

FIELD: electricity.

SUBSTANCE: invention is related to systems of magnetic impedance tomography. The system comprises an excitation system having several exciting coils to generate a magnetic excitation field intended to induce eddy currents in a surveyed volume, a measurement system with several measuring coils to measure the fields generated by the induced eddy currents, at that the measuring coils are placed in a volumetric (3D) geometrical assembly and a reconstruction device intended for the receipt of measurement data from the measurement system and for the reconstruction of the object imaging in the surveyed volume against the measured data. Each measuring coil covers an area and is oriented in essence transversely to the magnetic field power lines in the exciting coils, separate measuring coils cover jointly the area corresponding to the volumetric (3D) geometrical assembly, at that the exciting coils cover the area where the measuring coils are placed. The area covered by each of the separate measuring coils is oriented perpendicular to the area covered by the exciting coils.

EFFECT: usage of the invention allows improving the quality of imaging for volumetric objects.

8 cl, 2 dwg

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine. A device comprises: a measuring device, a calculation device and an input device. Implementing the method involves extracting the living body information measured by the measuring device. The input device is used to accept the biological component information measured by the other device together with the date and time information. That is followed by determining if the biological component information is actual. If the biological component information is stated to be actual, the calculation device is used to calculate the biological information by formula: f(ρ)=a2·1/ρ+b2·W+c2·S+d2·L+e2. If the biological component information is stated to be inactive, the calculation procedure follows formula: f(ρ)=a1·1/ρ+b1·W+c1. Herewith, a1-c1, a2-e2 are the pre-set constants, ρ is a living body's specific resistance, S is a body part cross-section, L is a body part length, W is a living body weight.

EFFECT: group of inventions enables providing the more accurate body composition measurement by using the data extracted by the other devices.

8 cl, 14 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medicine, forensic medicine, diagnostic measurements, including in investigative practice. An interactive psychophysiological testing (PPT) involves presenting a person being tested test questions, determining, analysing the psychogenesis parameters with using the person's physical parameter sensors, indicating the results and estimating. The test questions are typed as follows: first-version questions Q1, second-version questions Q2, neutral questions N. The questions Q1 and Q2 have an alternative meaning and equal power and are characterised by an equal presentation time, a consistency of comparing the questions according to the alternative versions, a minimised subjective personal effect of the PPT test expert by sound colour and level, an unconscious emotional support on the person's question perception, as well as an identity of putting the questions to be compared, their length and a fixation of the meaningful word and/or word combination in similar segments of both questions to be compared. The test is put in accordance with a concatenation as follows X:0→C,…,C→Q11.Q21→N→ →Q21.Q22→N→…→Q1n.Q2n→N, wherein X is a person's identification index; 0 is a non-estimated zero question; C is a question relieving an expectation stress; Q1i is the first-version question, wherein i=1, 2,…, n; Q2i is the second-version question, wherein i=1, 2,…, n; N is a neutral question; n is a number of specific circumstances of the event or action; ":", "→", "." are devisors. The questions are put taking into account the staging of the tested event, including the confirmed facts or data only and excluding the expert's conjectures or versions. The results are used to state one of the two alternative versions and to estimate the respective status of the person being tested. The psychogenesis is determined and analysed with using a polygraph, while putting the questions of the two alternative versions, indicating and processing the PPT data are conducted with a computer with relevant software.

EFFECT: method provides higher information value, accuracy, reliability, objectiveness of the PPT results as compared to the previously known tests up to 90-95% with avoiding the distortion and ambivalence of the results.

5 cl, 1 dwg

FIELD: medicine.

SUBSTANCE: technique involves impedancemetry accompanying surgical intervention. A one-side ingrown nail requires measuring an impedance of the involved and healthy nail folds. The measurements are taken at a frequency 2 of kHz and voltage 1 V. A coefficient K is calculated as a relation of the involved to healthy impedances. The value K of 1.5 or less testifies to an inflammatory reaction.

EFFECT: technique simplifies diagnostics and reduces its time.

2 ex, 1 dwg, 1 tbl

FIELD: medicine.

SUBSTANCE: method involves measuring an enamel electrical conductivity and assessing a light-induced fluorescence of a dental tissue in the lesion. A current intensity within the lesion of no more than 0.2 mcA and the absence of the enamel glow testify to the enamel intactness with zero points assigned. The current intensity of 0.21 to 1.99 mcA and the enamel glow testify to the preclinical enamel changes with 0.1 points assigned. The current intensity of 2.0 to 3.99 mcA and the enamel glow testify to primary caries changes at the stage of dead spot with 0.4 points assigned. The current intensity of 4.0 to 5.99 mcA and the enamel glow testify to primary caries changes at the stage of dead spot with 0.7 points assigned. The current intensity of 6.0 to 7.99 mcA and the enamel glow testify to primary caries changes at the stage of deep white spot with 1 point assigned. A dental tissue resistance index (RIdt) is calculated by formula: RIdt=(F0×0+F1×0.1+F2×0.4+F3×0.7+F4×1)/n, wherein F0 is the number of teeth with the intact enamel; F1 is the number of teeth with the preclinical enamel changes ; F2 is the number of teeth with caries enamel changes at the stage of dead spot; F3 is the number of teeth with caries enamel changes at the stage of white spot; F4 is the number of teeth with caries enamel changes at the stage of deep white spot; n is the number of intact teeth having preclinical and early clinical changes. The index is calculated prior to and after the therapeutic-preventive course. A positive difference of the indices prior to and after the therapeutic course testifies to the adequacy of the conducted therapy. The above difference being zero or less testifies to the necessity of the recurrent course or changes in the therapy.

EFFECT: method provides assessing the dental tissues taking into account the preclinical and early changes.

1 tbl, 1 ex

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine. A method for detecting individual's respiration and/or cardiac function is implemented by means of movement detection. A multiaxial accelerometer is placed on the individual's body. The accelerometer generates signals indicating the acceleration along separate spatial axes. A signal generation unit is used to generate a movement signal by linear combination of the accelerometer signals along the separate spatial axes. The movement signal indicates the individual's respiration and/or cardiac function. The accelerometer signals are weighed so that the accelerometer signal characterised by the maximum acceleration variation has the highest weight. The movement signal generation unit detects the accelerometer signal weight depending on correlation of the respective accelerometer signal and the accelerometer signal characterised by the maximum acceleration variation. The respective accelerometer signal weight is a correlation sign.

EFFECT: using the group of inventions enables increasing the movement signal quality having a high signal/noise ratio.

11 cl, 8 dwg

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