RU33695U1 - Cardio information removal and recording system and tools for assessing the state of the cardiovascular system - Google Patents

Description

Cardio Information Removal and Registration System

and tools for assessing the condition

of cardio-vascular system

The utility model relates to medicine, and more particularly to cardiology.

The analysis of patent and scientific and technical literature showed that the bulk of the information related to the detection of hypertension relates mainly to technical solutions that do not allow revealing the hidden and early stages of a violation of the blood pressure regulation system.

To diagnose and clarify the degree of regulatory dysfunction, a number of hemodynamic indicators are used (the minute volume of blood of the IOC, the stroke volume of blood circulation of the CRI, blood pressure of blood pressure, etc.), which are examined both at rest and upon presentation of loads, for example, orthostatic, physical or isometric.

However, for early detection of signs of impaired regulation of blood pressure in practically healthy individuals, i.e. persons with pressure values in the normal range established by WHO and without significant changes in target organs, known methods are not effective, while the number of new unconventional technical solutions for this is limited.

MKI: 6 AB 5/02 So, there is a known method for early diagnosis of hypertension, in

which, using the method of venous occlusive plethysmography, measures the volumetric blood flow velocity at rest and at isometric load, and then mathematically calculates the growth of the regional resistance index, which confirms or excludes the presence of the disease (see the description of patent RU 2134058, А 61В 5/02, 1999) .

There is also known a method that allows for differential diagnosis of hypertension at an early stage by determining the threshold of sensitivity to table salt (see the description of patent RU 000218449000, A 61B 5/00, 1999).

A plethysmograph is used as a diagnostic device according to the method of RU 2134058 (see above), and the method according to RU 000218449000 does not require technical means for its implementation.

The proposed utility model allows you to implement a method for detecting violations of the regulation of blood pressure at an early stage, the essence of which is described in the corresponding application for the method.

The basic device for the proposed model can be any of the devices capable of registering RR-intervals in digital form when taking biosignals from the subject, and further processing them using a computer.

Among the many patent-protected devices that use the digital allocation of RR-intervals and their further processing in order to diagnose a number of diseases of the cardiovascular system, the authors did not find devices for diagnosing an early violation of the regulation of blood pressure, and, most importantly, in people with arterial pressure within the norm established by WHO.

Therefore, it is advisable as a prototype to choose the simplest (in terms of the number of operations performed in the claimed embodiment) device for digitally recording the duration of cardio intervals (see the description of utility model RU 11038, A 61B 5/02, 1999), all the features of which are used in the proposed models, namely, a biosignal sensor, an analog-to-digital converter, made in one housing with a recording device, a computer with software that allows you to process and store all the results of the conversion Nij in computer memory as a file, and a printer, a monitor and a keyboard for inputting information. These signs, common with the prototype, are formed into three functionally interconnected blocks, the first of which contains a sensor and an analog-to-digital converter with a device registering RR intervals, the second is a computer with standard and specialized software for processing cardio intervals and the third block of peripheral devices, including monitor, printer and keyboard for entering information.

The proposed utility model differs from the described one in that the second block is made with the possibility of additional input into specialized software of the current values of systolic and diastolic pressures (SBP and DBP) and anthropometric data of the subject to determine hemodynamic parameters with their subsequent normalization to proper values, and specialized software is made in the form of tools for assessing the state of the cardiovascular system. In addition, provides options for the implementation of the pickup sensor

biosignals (in this case cardioinformation), in the form of a peripheral pulse sensor, namely, a finger or in the form of an ear clip.

A significant difference between the claimed model from the known one is the execution of a part of specialized software in the form of tools for assessing the state of the cardiovascular system.

Since such tools can be used in other devices for examining the state of the cardiovascular system, it is advisable to protect its constructive solution as an independent item in the utility model formula using a different prototype.

An analysis of the patent literature showed that, in part, the functions of the claimed tools for assessing the state of the cardiovascular system (CVS) are performed by various types of tables, diagrams, and other types of graphic images compiled on the basis of sets of values of various indicators, both normative and experimentally established for healthy individuals and being the basis of comparison.

So, for example, in the method for predicting the effect of treating hypertensive patients with physical training (see the description of patent RU 213074 A 61B 5/02, 1996), a table of values of normative indicators of regional hemodynamics identified in a group of healthy people is used as a comparison base.

In the method for assessing the rhythmochronoinotropic function of the heart / see patent description RU 2123278, A 61B 5/02, 199) use the optimum region of the information field located in the Cartesian coordinate system and containing a set of values of diagnostically significant indicators characterizing the state of the CCC The optimum region of this field is outlined

upper and lower bounds of complex configurations

This patent analyzes several information fields for each of the considered indicators, which have their own shape of the optimum region

The proposed useful model of tools for assessing the state of CVS differs from the complex of information fields described above as a comparison base in the process of assessing the rhythm chronotropic function of the heart both in the shape of the contour of the optimum region and the specifics of filling the information field, namely, the information field is formed by a set of hemodynamic indicators, and the optimum region is the norm region and its contour has the shape of a banana truncated from the ends, the upper generatrix of which corresponds to the hyperbole - the hyperbole un a2 + b2 / x, with ai 4 1CG6, bm 1,075, a2 -4, b2 0 925, the values of the variable x lie in the range 0 1-4 and the ends are bounded by secants passing through points with coordinates (55 73 ), (72, 48) and (30, 71), (58, 71)

In Fig 1 shows a structural diagram of a system

In Fig.2 is a diagram of the information field of the toolkit for analyzing the state of the CCC

It is advisable to present the structural diagram of the proposed model of the system for removing and recording cardio information in the form of three functionally interconnected blocks I, II and III (see Fig. 1), each of which performs both its specific functions and joint ones. So, block I carries out the removal and registration of cardio information and contains a finger sensor 1, in the housing 2 of which is placed an analog-to-digital converter 3 with a recording device. Block II processes the information (cardio intervals) and contains

personal computer 4 with standard and specialized 5 software, including tools 6. Functional communication of blocks I and II is carried out through galvanic isolation between finger sensor 1 and computer 4.

Peripheral unit III contains a standard set consisting of a display 7, a printer 8, a modem 9, and a keyboard 10 for entering commands and additional information into the system.

All components of this set are functionally connected to computer 4, communicating blocks (II and III) directly and indirectly (III and I).

Remaining within the framework of the conventional three-block presentation of the scheme of the proposed system, we can similarly present the contents of block II — the block that converts the input bio-information into the final diagnostic conclusion in a visual form. At its core, Block II (a computer with standard and specialized software) is a complex instrument through which this or that method is carried out, in this case it is a way of assessing the state of the blood pressure regulation system.

To implement this method using the claimed system, block II must provide the following functions:

Accumulation and storage (as recording files) of photoplethysmogram data

Isolation of cardiointervals (RR-intervals) from photoplethysmograms and their saving in the data file

Saving entered anthropometric data and blood pressure values

Determination of generalized hemodynamic indicators (indicators of minute volume of blood circulation and total peripheral resistance, normalized to proper values), characterizing the state of the blood pressure regulation system

The implementation of the functions of the Information field, specifically referred to in this model as a toolkit, indicating on its graphic display a label (see Fig. 2) corresponding to the values of the generalized hemodynamic indicators in their coordinate representation

An analysis of the affiliation (not affiliation) of the coordinates of the generalized hemodynamic indicators of the norm area for these indicators

Formation of the Conclusion with its issuance on the display and printer The structural reflection of the listed functions is shown in the diagram

systems by conditionally placing work files in block II (see similar structural solution of the prototype - RU 11038) Here, the most important distinguishing feature is the toolkit 6, designed to assess the state of the blood pressure regulation system

Thus, the following components are provided as part of block II of information processing, which ensure:

11- registration of photoplethysmograms and its saving as a file

12- allocation of RR-intervals and their preservation

14- determination of generalized hemodynamic parameters

15- analysis of the belonging of diagnostically significant generalized indicators of the toolkit being examined by the information field

16- formation of the Conclusion on the result of the analysis.

In FIG. 2 shows a diagram of the information field of tools for assessing the state of the blood pressure regulation system.

In Cartesian coordinates, this field is formed by a set of diagnostically significant hemodynamic indicators, presented in the entire range of their real values. It identifies the norm area, the contour of which covers the totality of the values of generalized hemodynamic parameters (x and y coordinates), recognized as the norm according to the results of clinical examinations of a contingent of healthy individuals with blood pressure that meets WHO criteria

The selected norm region has the shape of a banana truncated from the ends, the contour of which is formed by the upper boundary 17 in the form of a hyperbola + bi / x, the lower boundary 18 in the form of a hyperbola un a2 + b2 / x and two ends formed by secants passing through the points (xi, yi ) and (x2, y2) are the left end face 19 and the points (x3, uz) (X4, uz) are the right end face 20.

The ordinate values are determined experimentally and are: xi 0.55, Y 1.93; x2 0.65, y2 1.72; X3 1.29, y3 0.70; x4 1 58, y4 0 70

The values of the coefficients ai, a2, bn and b2 are also determined experimentally and are:

ai 4-106, bi 1.075, a2-4-u6, b2 0.925.

the subsequent determination of the values of relative hemodynamic parameters, it is necessary to specify the content of the component (14), namely:

ICOCSS

Moxdolg

Here IOC 100 + 0.5 (SAD-DAD) - 0, - 0,

opso where moc

IOC and OPSS - minute volume of blood circulation and total peripheral vascular resistance of the subject, respectively;

GARDEN, DBP - systolic and diastolic blood pressure, respectively;

In - age of the subject,

M is the average value of the RR interval,

ADSR - mean arterial pressure.

MOKdolzh and OPSSdolzh - due age-gender values of minute volume of blood circulation and total peripheral vascular resistance, respectively.

To fix the finger when removing the bioinformation by the optical element of the sensor, a cradle 21 for the finger and a clamp 22 are placed on the body of the sensor 2.

The system is as follows.

The operator from the keyboard 10 enters into the system all the necessary information about the subject - last name, first name, middle name, year of birth, weight, height (anthropometric data), then he measures and enters the value of blood pressure into the system. The finger of the examinee is placed on the lodgement

21 and is fixed by a clip 22.

After that, at the command of the system, from the device 10, the registration stage of the input information — photoplethysmograms — begins.

The photoplethysmogram coming from block I of recording and recording is recorded in the form of a file (11), the data of which is used to highlight RR intervals, also recorded in the form of files (12). Upon completion of the registration phase, the system automatically proceeds to data processing (processing stage). The statistical characteristics of RR intervals, anthropometric data, and blood pressure (SBP, DBP) are used to determine generalized hemodynamic parameters (14). The numerical values of these indicators after normalization to the appropriate age and gender values are displayed in the form of a label (Fig. 2) on the information field 6, which contains the selected area of the information field in the form of a banana truncated from the ends, which is the norm for these indicators.

The data processing stage ends with the formation of a conclusion on the state of the blood pressure regulation system (16), which is carried out on the basis of analysis (15) of the coordinates belonging to the mark indicated above (i.e., normalized values of hemodynamic parameters) of the normal range.

Authors .///i/Cf} Ryabova T.Ya.

1papak V.N.

10

The utility model formula.

1. A system for recording and recording cardioinformation with subsequent processing of cardiointervals, containing three functionally interconnected units, the first of which contains a sensor and an analog-to-digital converter with an RR-recording device, the second is a computer with standard and specialized software for processing cardiointervals and the third peripheral unit devices, including a monitor, a printer and a keyboard for VEYUDE information, characterized in that the second unit is configured to supplement nogo input in specialized software current values of variables systolic and diastolic pressures of the subject (SBP and DBP) for determining hemodynamic parameters, followed by normalization to their proper values, and specialized software designed as a tool for the assessment of the cardiovascular system.

2. The system according to claim 1, characterized in that the sensor is finger-shaped and an analog-to-digital converter with a recording device is placed in its body.

3. The system according to claim 1, characterized in that the sensor housing is made in the form of an ear clip.

4. A tool for assessing the state of the cardiovascular system, containing a set of diagnostically significant indicators located in the Cartesian coordinate system, forming an information field in which the norm area of these indicators is distinguished, characterized in that. that the information field is formed by a set of hemodynamic indicators, and the normal region is limited by a contour having the shape of a banana truncated from the ends, the upper generatrix of which corresponds to

the hyperbole ymax ai + bn / x, the lower one is the hyperbole ymin a2 + b2 / x, with ai, bi 1.075, a2, b2 0.925, the coordinates x lie in the range 0., and the ends are bounded by secants passing through the points with coordinates ( .55, .73), (.72, .48) and (.30, .71), (.58, .71).

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Claims (4)

1. A system for acquiring and recording cardioinformation with subsequent processing of cardiointervals, containing three functionally interconnected units, the first of which contains a sensor and an analog-to-digital converter with a device registering RR intervals, the second is a computer with standard and specialized software for processing cardiointervals, and the third a peripheral device unit including a monitor, a printer and a keyboard for inputting information, characterized in that the second unit is configured to complement Input ceiling elements in specialized software current values of variables systolic and diastolic pressures of the subject (SBP and DBP) for determining hemodynamic parameters, followed by normalization to their proper values, and specialized software designed as a tool for the assessment of the cardiovascular system. 2. The system according to claim 1, characterized in that the sensor is finger-shaped and an analog-to-digital converter with a recording device is placed in its housing. 3. The system according to claim 1, characterized in that the sensor housing is made in the form of an ear clip. 4. A toolkit for assessing the state of the cardiovascular system, containing a set of diagnostically significant indicators located in the Cartesian coordinate system that form the information field, in which the norm area of these indicators is highlighted, characterized in that the information field is formed by a set of hemodynamic indicators, and the norm area is limited by the contour having the shape of a banana truncated from the ends, the upper generatrix of which corresponds to the hyperbola Y _max = a ₁ + b ₁ / x, the lower one to the hyperbole Y _min = a ₂ + b ₂ / x, while a ₁ = 4 · 10 ^-6 , b ₁ = 1.075, and ₂ = -4 · 10 ^-6 , b ₂ = 0.925, the values of the x coordinates are in the range 0.1 ÷ 4, and the ends are limited by secants passing through points with coordinates (x ₁ = 0.55, y ₁ = 1.73), (x ₂ = 0.72, y ₂ = 1.48) and (x ₃ = 1.30, y ₃ = 0.71), (x ₄ = 1 , 58, y ₃ = 0.71).