What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

Diagnosis is based on the use of the principle of resistance (impedance) of tissues and blood vessels to the effects of an electric current of permissible frequency and voltage. Resistance indicators vary depending on the speed of blood flow and blood volume in the vessels. High impedance will correspond to insufficient blood supply. The pulsation of blood in the vessels is recorded by a medical device, like a jump in resistance.

The recorded digital data is projected onto paper in the form of a graphic broken line – a reovasogram. Changes in the graph of the shape, nature of fluctuations, the symmetry of the curve of the line are compared with standard indicators. The detected deviations allow us to judge the degree of damage to the vessels of the legs. The results of the rheovasogram make it possible to assess the degree of narrowing and contractility of the veins and arteries, to identify the presence of lateral and bypass blood flow paths (collateral).

With a decrypted rheovasogram of the vessels of the lower extremities, the patient is sent to the doctor who prescribed the examination. Based on the results, a diagnosis is made and treatment tactics are chosen. With non-dangerous stages of vascular damage, the doctor prescribes special medications that strengthen the vascular walls, diet, rational exercise, compression underwear. In some cases, it is recommended to change the scope of work if work aggravates the disease.

Serious changes in the blood flow system are an indication for additional studies. A more detailed analysis of the hemodynamic process includes methods:

  • RK angiography (radiopaque). Diagnosis of vascular diseases by X-ray with a contrast agent;
  • MR angiography. Examination on a magnetic resonance imager;
  • USDG. Doppler ultrasound.

Depending on the final results, the patient is prescribed conservative therapy or surgery. If you experience systematic discomfort in the lower or upper extremities, you should consult a phlebologist or a vascular surgeon. The sooner the pathology is established, the less radical will be the way to eliminate it.

Rheography is a method of studying the blood supply to organs and parts of the human body. It consists in measuring and graphically displaying pulse fluctuations of impedance, depending on the blood supply to the organ. (Impedance is the resistance of tissues to the passage of high-frequency alternating current.)

The scope of rheography is practically unlimited: the brain, the ocular membrane, limbs, heart, lungs, liver and other internal organs. For procedures on individual parts of the body, there are names:

  • REG – rheoencephalography (brain);
  • ORG – ophthalmoreography (choroid);
  • RVG – rheovasography (vessels of the upper and lower extremities).

What is this – rheovasography (RVH) of the vessels of the upper and lower extremities? Consider all the nuances in order.

RVG allows you to diagnose tissue blood flow pathologies (ischemia and hyperemia), obliterating (narrowing) vascular lesions, but is not able, for example, to reliably determine aneurysm (protrusion of the vascular wall).

In addition, RVG provides a convenient way to establish the nature of hemodynamic disturbances – organic or functional. The examination allows us to determine whether the deterioration of blood flow is caused by anatomical causes or is caused by an incorrect lifestyle.

RVG is necessarily prescribed based on the patient’s subjective complaints about:

  • cramps or swelling of the legs;
  • the emergence of vascular “stars”;
  • pain and/or weakness when walking, arising and disappearing for no reason;
  • numbness, chilliness, blanching of the feet or hands;
  • pain in the hands with a light load or at rest.

There are no absolute contraindications for the procedure, but are considered relative:

  • exacerbations of chronic diseases;
  • severe infectious diseases;
  • diseases in which it is impossible to cancel antiplatelet agents, anticoagulants, hemostatics and drugs that affect vascular tone – psychostimulants, analeptics, etc.

The price of the examination varies depending on the status of the clinic, the type of rheograph and the number of samples (pharmacological and functional).

In the Russian Federation, from 1300 to 2800 rubles will have to be paid for reovasography on an apparatus with digital data processing.

For comparison, we give prices in other countries popular among Russians – adherents of “medical tourism”:

  • Belarus – from 15 to 30 thousand barrels, but for foreign citizens there is a separate price list (an average of $ 10);
  • Ukraine – from 220 to 350 UAH .;
  • Israel – from 100 to 200 dollars;
  • Germany – from 300 to 700 euros.

Preparation for RVG requires the following simple restrictions from the patient:

  • one day before the procedure, stop taking medications that affect blood flow and vascular patency;
  • at least 8 hours do not smoke, do not chew nicotine gum and do not sniff tobacco;
  • within 2 hours do not eat or undergo intense physical exertion;
  • 15 minutes before the procedure, take a horizontal position, relax and lie down in silence.

The temperature in the office where the examination takes place is set at 20-23 ° C, because the patient will have to remove everything that covers and squeezes his hands or feet, and for a while to lie still.

To register impedance fluctuations, electrodes (aluminum, lead, brass, etc.) are fixed on both limbs of the patient, and they are positioned strictly symmetrically, and the skin at the attachment points is degreased with alcohol.

Depending on whether the entire limb or part of it becomes the subject of research, the doctor determines the location and method of applying electrodes (longitudinal or transverse).

To study the weakened peripheral blood flow, a longitudinal method of attachment is usually chosen (on one surface of the limb), in other cases, transverse (at the same level, but opposite sides).

To study the dependence of hemodynamics on external conditions, the result of RVG at rest is often compared with a rheogram after various tests: pharmacological, compression, or physical exercise tests.

For example, to eliminate deep vein thrombosis, a compression test is used: the limb is cuffed for a short time, and after removal, the RVG is repeated. To distinguish between functional and organic disorders of vascular patency, a test with nitroglycerin is used (0,5 mg under the tongue, after 5 min – repeated RVG).

To compare rheograms with cardiac activity, simultaneously record, if possible, more electro- and phonocardiograms (ECG and FCG).

The result of RVG of the lower or upper extremities (rheogram) is a complex quasiperiodic curve, the interpretation of rheovasography is based on the study of the properties of the averaged rheographic wave:

  • high-quality – the presence of “peaks”, the steepness and slope of the “rises” and “descents”;
  • quantitative – the amplitude value, the length of some time intervals, etc.

Based on the found values ​​and special formulas, control indices are calculated:

  • rheographic (RI, registers the intensity of arterial blood flow);
  • elasticity (IE, reflects the state of the walls of the arteries);
  • peripheral resistance (IPA);
  • values ​​of venous outflow (VO).

The main indicator is considered to be RI: by its size they judge the patency of the riverbed. IPS and HE, in contrast to IE and RI, are only indirect numerical characteristics.

Reference intervals for indices are not shown here for the following reasons:

  1. In rheography, there was no common terminology and calculation methodology: the coefficients of the same name, calculated under similar conditions for representatives of the same age group in different medical facilities, can differ by a factor of ten.
  2. Norms are determined separately for each segment of the limb: shoulder, forearm, hand, thigh, lower leg, foot.
  3. The values ​​of some indicators depend on age: for example, in elderly people, RI is lower than in healthy youth (especially the vessels of the lower leg).

Many severe pathologies originate in seemingly small, insignificant manifestations, which rarely anyone pays attention to. Even mild vascular changes can subsequently lead to stroke, heart attack, amputation of limbs.

23333 - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

Vascular diseases arise for various reasons, it can be psycho-emotional stress, an unbalanced diet, an intense rhythm of life.

The earlier an unstable state, the onset of the disease is detected, the more competent and adequate therapy is selected, and this is an important aspect for maintaining health.

In medicine, preference is given to non-invasive research methods, which are very informative, one of them is lower limb rheovasography (RVH). We’ll take a closer look at this method: for what purpose rheovasography is performed, to whom it is shown and how the examination results are decoded.

Rheovasography is one of the methods of diagnosis in which the blood circulation in the lower and upper limbs of the patient is examined. Blood circulation investigated in this way is called hemodynamics.

It reveals a picture of the state at the time of the examination of the cardiovascular system, and also allows you to assess vascular tone. RVG shows the condition of arteries, veins in a selected area of ​​the legs, arms, makes it possible to determine the ongoing changes in the walls of blood vessels.

When deciphering, it can be seen whether there is a partial narrowing of the vessels or there is complete obstruction.

In human life, the main load falls on the lower extremities, therefore, most often, a study is prescribed for this part, this allows you to assess the blood vessels of the legs and prescribe the correct treatment.

e0a7a9e263aa996e08d17ae70d360d5d - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

It is possible to undergo reengineering not only in the direction of a doctor, but also independently. This study is carried out in many specialized clinics at an affordable cost. If you need reovasography of the lower extremities in Moscow, you can contact the following addresses:

  • 2nd Tverskaya-Yamskaya Lane, Building 10 – OJSC “Medicine”.
  • Banny Lane, Building 2 – SVSR.
  • MKRN Novogorsk in Khimki – Design Bureau No. 119.
  • St. Novozavodskaya, house 14a – clinic number 2.
  • St. Lyapidevsky, d. 14/1 – “Dobromed”.
  • St. Budayskaya, Building 2 – Russian Railways OJSC, Central Design Bureau No. 2.

Basic Concepts

Rheovasography or RVG is a modern method of functional diagnostics that allows you to assess the state of blood flow in the vascular system of the arms and legs. It is often used to diagnose blood circulation in the vessels of the legs, because vascular pathologies affecting the veins of the legs are more common. The data obtained as a result of the procedure make it possible to judge the tone of the vascular network of the limbs and the state of the cardiovascular system as a whole.

Examining the selected site by this method, determine the presence of vascular obstruction or the presence of vascular stenosis. Often the question arises, where it is possible to make RVG of cerebral vessels. The question is not entirely eligible. To deal with it, you need to understand what a reographic study is, and what it can be.

Among the rheographic methods distinguish:

  • rheovasography;
  • rheoencephalography (study of cerebral vessels);
  • rheohepatography (liver examination);
  • thoracic rheography and its branch – rheocardiography.

Rheovasography of the lower extremities, like hands, is a non-traumatic procedure, it is performed without violating the integrity of tissues, painless. The only thing that can cause discomfort is the process of connecting the electrodes. It is unpleasant not in terms of physical pain, but in terms of emotional discomfort.

Rheovasography is one of the methods of diagnosis in which the blood circulation in the lower and upper limbs of the patient is examined. Blood circulation investigated in this way is called hemodynamics. It reveals a picture of the state at the time of the examination of the cardiovascular system, and also allows you to assess vascular tone.

  • 2nd Tverskaya-Yamskaya Lane, Building 10 – OJSC “Medicine”.
  • Banny Lane, Building 2 – SVSR.
  • MKRN Novogorsk in Khimki – Design Bureau No. 119.
  • St. Novozavodskaya, house 14a – clinic number 2.
  • St. Lyapidevsky, d. 14/1 – “Dobromed”.
  • St. Budayskaya, Building 2 – Russian Railways OJSC, Central Design Bureau No. 2.

Depending on the institution in which the procedure is carried out, its reputation, location, the quality of the equipment on which the lower limbs reovasography is performed, the price may fluctuate. Cost – from 800 to 2500 rubles.

Rheovasography is one of the non-invasive methods of examination, where penetration into the body is not required. For carrying out use high-frequency current. This study is not used for the vessels of the head, in which case the diagnosis is called rheoencephalography.

Appointment and contraindications

To conduct rheovasography of the vessels of the upper and lower extremities, an electrocardiograph (ECG apparatus), special electrodes and a rheographic prefix are required. The task of a medical professional is greatly facilitated if computerized recording of indicators is used. In the study, a high-frequency current is used, which does not bring any unpleasant sensations.

Blood is able to conduct electric current, for this reason, the resistance changes in different phases of the bloodstream. Dependence here is inversely proportional: with greater blood supply – less tissue resistance. From high to low there is a constant fluctuation. The rheovasogram graphically displays the passage of the pulse wave, the amplitude increases with increasing blood supply and, conversely, decreases with its decrease. The doctor of functional diagnostics sees the disturbance on the graph and can draw conclusions about the nature of blood flow.

Rheovasography of vessels of the lower extremities is used both for the initial study of vascular pathologies and for monitoring the development of the disease. Indications are:

  • Atherosclerosis, which often contributes to the violation of proper nutrition of tissues and narrowing of the gaps in the artery.
  • Diabetes. Reovasography of the upper and lower extremities is performed. This ailment can lead to micro- and macroangeopathies, which subsequently develop a diabetic foot.
  • Raynaud’s disease. Neurocirculatory asthenia is characteristic, periodic spasms of the peripheral arteries are possible.
  • Severe headaches that occur due to violations of the outflow of venous blood, as well as spasms of arterial vessels.
  • Chronic cerebral pathologies, intracranial hypertension.
  • Neurocirculatory asthenia, which depends on the lability of vascular tone.
  • Diseases of the venous bed, which contribute to violations of the outflow of blood, in particular along the veins of the legs.
  • Thrombophlebitis, leading to the formation of blood clots on the walls of blood vessels.
  • Phlebeurysm.
  • Embolism when a blockage occurs in the bloodstream.
  • Obliterating endarteritis, which can lead to lameness.

In the absence of pronounced RVH diseases, it is recommended in cases of numbness of the extremities, with the appearance of bluishness and seizures, with loss of sensitivity, discoloration of the skin, and edema.

Each study has both its advantages and disadvantages. They can be associated with the technical side or with the professionalism of the staff. It is important that all the negative sides can be corrected and debugged for the better in the diagnostic process. The advantages of RVZ are as follows:

  • Non-invasive method. A significant positive point is that the patient is not exposed to unpleasant and painful effects, for example, catheterization of veins. For research, a specially designed equipped office is not required, enough necessary devices.
  • Ease of carrying out. A big plus for the staff. A qualified nurse can take a rheovasogram; its task is to apply electrodes and turn on the resograph. Analysis of the results will be done by the doctor.
  • Inexpensive and affordable equipment for research.
  • Safety procedures. RVG is possible in children and pregnant women.
  • Reliable information. Vascular patency, quality of blood outflow, pathology and their prevalence level are determined with great accuracy.
  • It is possible to conduct differential diagnosis of vascular lesions from functional impairment.

The patient lies on the couch, and the pose is on his back. The skin of the limbs is degreased with alcohol. Sensors are attached to the treated areas. The wires are drawn from the device, ending with electrodes, which will read the information. The signals are transmitted to the screen, a reovasogram is recorded, and the main indicators are calculated.

A rheovasogram can be performed using multichannel rheographs, or the study is carried out sequentially, starting from areas remote from the center, ending with neighbors. A characteristic feature when placing the conductors is strict symmetry.

Often after a trauma or accident with physical injuries, you can hear the phrase: “hands and feet are safe – it’s already good.”

A popular saying has a solid foundation, because the importance of the normal functioning of the limbs cannot be overestimated.

If for some reason a person began to feel unpleasant numbness in his hands or feet, cramps or cooling, then doctors, in addition to a possible comprehensive examination, prescribe a study such as rheovasography.

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Definition

Rheovasography (RVH) is one of the ways to diagnose blood circulation in the upper and lower limbs of a patient. The studied blood circulation is called hemodynamics. Based on the examination, you can make a picture of the general condition of the cardiovascular system, evaluate the tone of the vessels.

Using RVG, data are obtained regarding the condition of the veins and arteries of the selected area on the arms or legs, and possible changes in the walls of blood vessels are determined. Most often, the results show whether there are partial narrowing of the vessels or their complete obstruction.

Since in the process of human life a large load falls on the legs, the study of the lower extremities is most often prescribed, which allows to assess the state of blood flow in the vessels of the legs.

Reovasography can be done either as prescribed by a doctor or independently. To do this, contact a medical, diagnostic and treatment center or a specialized clinic.

Rheovasography refers to a non-invasive examination method, i.e. does not imply penetration into the patient’s body. When it is used, a high-frequency current is used.

This definition should not be applied to the name of the head vessels study.

The concept of “rheovasography of the vessels of the head and neck” is absent, since correctly this diagnosis is called “rheoencephalography”.

In a general concept, it means a blood circulation test method in which fluctuations in the resistance of living tissue are recorded. In this case, the use of alternating high-frequency current.

Rheovasography of the upper and lower extremities refers to completely harmless diagnostic methods, is characterized by the absence of painful sensations and has no side effects. There are no contraindications for the study.

During the procedure, a high-frequency current (10 mA) acts on a specific area of ​​the patient’s body. At the same time, electrical resistance is recorded. This value is variable and depends on the blood saturation of tissues, i.e. pulse blood flow.

The examination device registers precisely the total resistance to tissue current. Human blood has a high electrical conductivity, and the skin and bones are the smallest.

Pulse oscillations of blood vessels will be displayed on the reovasogram – the resulting curve. It can distinguish individual passages associated with the influx and outflow of blood. The shape of the rheovasogram, its symmetry, the severity and nature of the rise and descent of the curve, the localization of the waves give information about the state of the vessels.

Circulatory disorders are caused mainly by inflammatory or atherosclerotic vascular lesions. A rheovasogram with rheovasography of the vessels of the limbs can clearly show a deterioration in venous blood circulation, which is associated with:

  • Lowering the tone of venous vessels;
  • Trophic disorders.

The consequence of these disorders is obstructed blood outflow.

The device used for RVG not only registers the main indicators, but also performs an analysis of blood circulation in the vessels.

In the absence of pronounced or previously identified diseases of RVH, it is necessary to pass in those cases if there is numbness of the limbs, blueness, or convulsions. Rheovasography of the lower extremities is prescribed in the presence of patient complaints not only of loss of sensation, but also of swelling of the legs, discoloration of the skin.

An indication for the study may be embolism (blockage of the bloodstream). Obliterating endarteritis is the reason for conducting rheovasography of the arteries of the legs, since it is a vascular disease with a primary lesion of the arteries of the lower extremities. With such a disease, a person experiences rapid fatigue of the legs, cramps and pain, which can lead to lameness.

Before proceeding to the study of the upper and lower extremities of the patient, the basic requirements preceding the rheovasography procedure must be observed:

  • Within 15 minutes, a person should get complete relaxation (preliminary rest);
  • 2 hours before RVG, the intake of nicotine into the body of smokers should stop;
  • 24 hours before the study, it is necessary to suspend the use of any medicines by patients undergoing treatment;
  • With RVG of the lower extremities, the legs should be freed from clothing.
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A man settles on a couch in a pose lying on his back. The skin of the extremities should be degreased with an alcohol solution. Sensors are placed on the treated areas. Electrodes placed on the legs are connected to the device thanks to the wires. The sensors transmit a signal to the screen where a reovasogram is recorded with the calculation of the main indicators.

RVG of limbs can be carried out simultaneously using multichannel rheographs or sequentially, starting from body parts located further from the center, and ending with sites closer.

To record RVG, for example, the forearm sensors are located in the zone of the ulnar fossa and wrist. Recording of rheovasography of the lower leg is accompanied by the placement of electrodes in the popliteal fossa and ankle.

The sensors on the fingers should be placed at a distance of 3-4 cm from each other.

A characteristic feature of the placement of conductors is compliance with strict symmetry.

The results based on the obtained indicators allow the doctor to draw conclusions about the presence of any circulatory disorders. RVG also makes it possible to determine what the nature of the changes is: organic or functional. This will directly affect the patient’s follow-up treatment regimen.

Indicators

  • venous network diseases (varicose veins, phlebitis, thrombosis and their combinations);
  • impaired peripheral circulation due to diabetes;
  • Raynaud’s syndrome;
  • damage to the ganglia of the spinal cord with impaired peripheral blood flow;
  • atherosclerotic changes.

31795594 kak ubrat varikoz doma - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of RvgSuspicion of a common disease such as varicose veins is also an indication for rheovasography

  • vascular diseases: thrombophlebitis, atherosclerosis, Raynaud’s syndrome;
  • metabolic diseases – diabetes, with the development of peripheral angiopathy;
  • varicose veins;
  • thrombotic lesions of the veins, obliterating endarteritis;
  • expressed complaints about vascular damage: swelling on the legs, cramps, trophic disturbance (pallor of the extremities, the appearance of spider veins).
  1. Varicose veins, thrombophlebitis of the lower extremities, deep vein thrombosis.
  2. Atherosclerosis of the lower extremities, obliterating endarteritis and other arterial lesions.
  3. Rheumatic diseases (Raynaud’s syndrome, systemic vasculitis, etc.)
  4. Diabetes mellitus complicated by angiopathy of the vessels of the legs.

Rheovasography of the upper and lower extremities: indications for research, methodology, interpretation of the results

Rheovasography of the lower extremities can be prescribed to heavy smokers who complain of intermittent claudication and pain in the legs, as often people with this bad habit suffer from obliterating endarteritis, vascular pathology of the lower extremities. The upper ones are affected much less frequently.

  • for the study of the vessels of the forearm – on the wrist and the region of the ulnar fossa;
  • lower legs – on the ankle and in the popliteal region.

If the sensors are placed on the fingers, the distance between them should be about 3-4 cm. The sensors are located symmetrically. The rheogram allows the attending physician to establish the presence of malfunctions in the blood supply and determine the type of violation (functional, organic).

reovasografia provedenie - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of RvgThe sensors are located in the place to be examined.

A study of the state of blood flow using rheovasography shows hemodynamics of the lower extremities. According to the results of RVG, it is possible to assess the condition of veins and arteries, to predict further deformations in the vascular system. Based on the testimony of RVG, it is possible to judge the presence of narrowing of blood vessels, the degree of patency.

Rheovasography is a non-invasive painless technique. In other words, the study does not carry out any penetration into the human body. RVG does not give any side effects and has no contraindications.

reogramma - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

During the procedure, a high-frequency current (10 mA) is used, which acts on the examined part of the body. During the procedure, electrical resistance is recorded. The level of resistance depends on the saturation of tissues with blood (an indicator of pulse intake). The highest level of electrical conductivity is characteristic of blood, and the lowest – for bones and skin.

Pulse oscillations are recorded on the reovasogram in the form of a curve. An experienced diagnostician reads a rheovasogram, distinguishing the moments of blood inflow and outflow from it. The state of the patient’s vascular system can be judged by the degree of symmetry, by the nature of the changes in the curve, by the localization of the waves.

Circulatory problems are most often caused by an inflammatory or atherosclerotic process in the vessels. A rheovasogram determines a decrease in the intensity of venous circulation with a deteriorated vascular tone, in case of tissue trophic disturbance.

RVG is one of the latest modern non-invasive diagnostic methods. It is used to examine the blood vessels of the legs and arms.

The technique helps to identify arterial obstruction sites that lead to inflammation. There is also the opportunity to examine the vessels, identify violations associated with their work.

Principle of operation

The essence of the method is to detect the resistance of the skin area through which a harmless electric current is passed.

In sensors attached to the body, a certain force and frequency of charge oscillations are set.

If the blood flow is not intense enough, then the resistance of the skin and tissues becomes higher, and vice versa.

The readings of the device are displayed on the monitor, and then on a tape of paper. Where all changes are recorded in the form of a curve line.

The process of performing the survey and the information output of the results is similar to an ECG. Based on these data, the doctor makes a diagnosis regarding the study area.

  • Identification of blood flow pathologies in the legs.
  • The study of the vascular channels of the hands.

    Based on the statistics of diseases, the diseases of the lower extremities are most common, therefore rheovasography of this species is used more often.

    Main indications

    It is possible to identify a disease and prescribe a procedure based on a person’s complaints. The patient should list the symptoms manifested over a certain period of time.

    Some symptoms may indicate obvious diseases that can be clarified during the examination:

    • atherosclerotic lesion due to stenosis or complete closure of the supplying artery;
    • autoimmune pathology with irregular hemodynamics in the hands;
    • diabetes mellitus with complications;
    • inflammation of the walls of the arteries from the inside;
    • varicose veins.

    In addition, with the help of RVG, the etiology of the disease can be determined. Understand what influenced the subsequent development of pathology, the structure of the channels or the reasons caused by the lifestyle.

    contraindications

    Speaking about contraindications for rheovasography, only relative can be called, since there are no absolute ones. Namely:

    • In the presence of chronic diseases during their exacerbation, this research methodology cannot be carried out.
    • Infectious diseases.
    • If a person takes drugs continuously, affecting vascular tone, such as hemostatics or psychostimulants.

    How to prepare

    The procedure itself is quick and does not require special preparation.

    The patient should sit on the couch, on the back. The doctor attaches the sensors in the form of suction cups to the examined area. Then for 15 minutes he observes the indicators.

    Before RVG recommend:

    • Before the examination, you need to relax the muscles, lie down for 20-30 minutes;
    • stop taking drugs that affect the bloodstream and blood vessels at least a day before the study;
    • do not drink alcohol a few days before the procedure;
    • those who smoke need to abstain for a couple of hours before reovasography;
    • On the day of the examination, do not overwork and try to avoid emotional stress.

    This preparation guarantees the most accurate result of the testimony obtained during rheovasography.

    If you ignore the rules of preliminary organization, then a single malaise can be confused with serious pathology. The specialist should take this into account.

    In case of violation of the rules must conduct an additional trial. This will allow you to compare the results of the indices and make the correct diagnosis.

    How is

    In the office where the procedure itself takes place, it should be warm enough, as the patient is forced to take off his clothes, freeing his limbs for examination.

    In order for the fixed electrodes to show accurate data, a person must lie still. For convenience, a soft couch is available.

    Before fixing the sensors, the surface oily layer is removed from the skin. Install them clearly according to the principle of longitudinal or transverse placement. It depends on the investigated limbs.

    If the mechanical activity of the vessels of the hands is examined, then the sensors are located in four places throughout the limb. On the feet are the feet, legs and hips.

    RVG allows you to obtain data on the quality of the veins and arteries of a particular part of the body and detect pathological changes. Using the procedure, areas of narrowing and obstruction of the vessels are identified.

    Since the greatest load falls on the lower extremities, rheovasography of the vessels of the legs is performed more often than hands.

    You can undergo an examination both on the recommendation of a doctor, and on your own. To do this, contact the clinic or diagnostic center. Rheovasography is a non-invasive technique, when it is performed, a high-frequency current is used.

    Lower limb ADH is considered a completely safe diagnostic procedure. With its passage there are no unpleasant sensations and undesirable consequences. There are no contraindications for rheovasography.

  • The vessels of the lower or upper extremities of a person are affected by a high-frequency current.
  • Along with this, electrical resistance is recorded. This value is variable, it is determined by the saturation of the arteries, i.e., the frequency of blood flow.
  • The device records the total tissue resistance. Blood has increased conductivity, and skin and bones have reduced conductivity.
  • These indicators on the reovasogram form a curved line. The type of the obtained curve, its symmetry and the height of the waves allow us to analyze data on the state of veins and arteries.

    Circulatory disturbance occurs with atherosclerosis and inflammatory processes. Rheovasography can detect a decrease in venous blood flow velocity, which is associated with a decrease in vascular wall tone and trophic disorders.

    The main indications for the diagnostic procedure: cyanosis and decreased sensitivity of the limbs, the frequent occurrence of seizures.

    The study of the vessels of the legs is also necessary in case of a change in the condition of the skin, the appearance of puffiness and varicose veins.

    Decoding of the results of rheovasography is necessary when choosing a method for the treatment of the following diseases that contribute to circulatory disorders in small vessels:

    • atherosclerosis;
    • thrombophlebitis;
    • Raynaud’s syndrome, which is considered one of the manifestations of rheumatism;
    • varicose veins;
    • diabetes mellitus.

    RVG for assessing the state of veins and arteries is performed with embolism, obliterating endarteritis. The latter disease most often affects the vessels of the lower extremities. Its first symptoms are: a constant feeling of heaviness in the legs, pain and cramps, a change in gait.

    Before starting the procedure, a person should rest and relax. Quitting smoking is necessary at least 2 hours before undergoing rheovasography. For a day, stop treatment with drugs that affect the circulatory system.

    Legs or hands should be removed from clothing. A person lays on a couch, the skin is treated with alcohol, sensors are fixed on the studied areas. The electrodes are connected to the device by wires.

    They transmit readings to a screen where a reovasogram is recorded and basic calculations are made.

    RVG of the limbs is carried out sequentially, starting with the most distant from the center and ending with the nearest departments. To assess the condition of the arteries of the forearm, the sensors are placed in the region of the ulnar cavity and wrist. When performing rheovasography of the legs, the electrodes are placed under the knee and near the ankle joint.

    Sensors should be placed symmetrically. Based on the results of the procedure, the doctor draws conclusions about the presence of circulatory problems. Using RVG, you can determine the nature of the pathology. Depending on this, a treatment regimen is selected.

    Particular attention during the procedure is given to the reographic index. It is calculated by comparing the highest wave height with a calibration pulse. This indicator is measured in Ohms, reflects the amount of blood entering the organ. The larger the flow, the lower the vascular resistance.

    How is RVG performed?

    The procedure is performed at a certain temperature. Cold in the room helps to narrow the arteries, and too high a temperature – to expand. The patient is invited to lie on his back. The test site is degreased with alcohol, a pad moistened with a conductive sodium chloride solution (5-10%) is placed on the skin, 2 metal electrodes are attached symmetrically, which are fixed with rubber bandages.

    The mechanism of action of RVG is to pass an electric current through the examined part of the body. The strength of the pulses is minimal and completely safe for humans. The study of the vessels of the lower extremities is carried out using high-frequency current (10 mA). Passing through the body, the electrical pulses encounter various resistance and create voltage fluctuations, which are recorded by the sensors and transmitted to the recording device (rheograph). The parameters are reflected in the rheovasogram, a curve of the line where the rise and fall of the jumps indicate the influx and outflow of blood.

    The essence of the study

    The principle of the method of this study is to measure the resistance of a skin area when an electric current of minimum strength (absolutely harmless), voltage and a certain frequency are passed through it using special sensors.

    Depending on the intensity of blood supply to the tissues, their resistance changes. The worse the blood flow, the higher the resistance of the skin and tissues.

    Changes in the resistance parameter are displayed on a paper tape in the form of a curve line, along which the functional diagnostics doctor determines the nature of blood flow in the studied body area.

    There are 2 types of rheovasography – the study of blood flow in the lower and upper limbs. Since statistically more frequent diseases of the vessels of the legs develop, the rheovasography of the lower extremities is more relevant.

    Conducting research

    The essence of the study

    Therefore, early detection of a disease or unstable condition, adequate and competent therapy is an important aspect of maintaining health in the future.

    reovazografiya nizhnih konechnostei - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    There are many diagnostic methods, but preference is always given to non-invasive methods with high information content. One of these methods is rheovasography (RVG).

    Vessels are elastic tubes of various diameters – without them, the human body cannot fully function.

    Arterial vessels supply oxygen and nutrients to the tissues, the volume of which decreases significantly when blood flow is disturbed, for example, with stenosis of varying severity.

    Venous vessels collect metabolic products, so their normal functioning is no less significant.

    RVG is an affordable and easy-to-use diagnostic test, for the implementation of which an ECG apparatus (electrocardiograph), a reographic attachment and special circular electrodes are required. At the present stage of development of medicine, computer data recording is possible, which greatly simplifies the task of medical workers.

    RVG allows with sufficient accuracy to exclude or confirm the presence of vascular pathology

    The RVG method is based on registration of tissue resistance to alternating current of high frequency, which does not bring unpleasant sensations. Due to the fact that the blood conducts electric current well, the resistance index will vary depending on the phase of blood flow. This dependence is inversely proportional: the greater the blood supply, the less tissue resistance, and vice versa.

    The blood supply to tissues and organs constantly varies from high to low numbers. The heart contracts and throws a portion of blood into the aorta, in the arterial vessels the pressure rises, which dies with the flow of blood (from large vessels to small ones). This physiological phenomenon is called a pulse wave.

    A reovasogram is a graphic reflection of a pulse wave: with an increase in blood supply, the amplitude of the curve increases, and with a decrease, it decreases.

    When registering changes in resistance on a graph, a functional diagnostics specialist can detect signs of circulatory disorders or make a conclusion about the presence of normal blood flow.

    Rheovasography (Rvg) is the most common method for examining peripheral vessels of the extremities.

    This technique has general availability, does not require much time for examination and high material costs.

    Instrumentation apparatus for rheovasography is in any diagnostic room of each clinic.

    There is also a rheoencephalography technique (Reg), which has the ability to examine blood flow in the brain, as well as blood movement in the cervical region.

    This is a completely different technique and should not be confused with the instrumental method of rheovasography. The principles of equipment and work are similar, but there are distinctive nuances.

    Rheovasography is used for the following pathologies in the body:

    • Numbness of the lower and upper limbs;
    • Sore legs during movement, as well as pain at rest;
    • Swelling in the lower extremities;
    • The state of cramps in the legs;
    • Cyanosis appears on the fingers of the limbs;
    • Lameness;
    • The appearance of non-healing wounds and ulcers on the lower extremities.

    Also, this technique is used for the effectiveness of drug therapy of such pathologies as:

    • Atherosclerosis of lower limb arteries;
    • Varicose veins on the extremities;
    • Thrombosis, or thrombophlebitis;
    • Pathology of Raynaud’s syndrome.

    default user image - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    Investigate the condition of the walls of peripheral vessels shown to people with diabetes. This pathology concerns not only the metabolic process in the body, but also affects the blood circulation system, especially its peripheral departments.

    There are no contraindications for conducting a study using rheovasography; a study can be performed even during pregnancy.

    Using this research method, you can identify such deviations:

    • Cerebral ischemia;
    • Complications after a traumatic situation on the skull;
    • The initial stage of cerebral arteriosclerosis;
    • Identification of osteochondrosis of the cervical and thoracic spine.

    It is necessary to apply a specialized gel on the sensors, for improved contact of information sensors and skin integuments.

    1. Atherosclerosis of blood vessels, regardless of localization.
    2. Obliterating endarteritis.
    3. Varicose disease of the lower extremities.
    4. Thrombophlebitis.
    5. Phlebothrombosis.
    6. Systemic diseases of the connective tissue: Raynaud’s syndrome, vasculitis, SLE and others.
    7. Diabetes mellitus of any type.

    For patients who have such a diagnosis, rheovasography is mandatory. Moreover, to monitor the effectiveness of treatment, assess how much the disease is progressing, reovasography of the lower extremities is done every few months.

    Rheovasography of the lower extremities has very small disadvantages, these include the following points:

    • Human factor. If there are too many patients, a nurse’s lack of proper rest can lead to dispersal of attention, and this can affect the quality of registration. If the working conditions, the rest regimen are observed, the qualifications of the medical staff are high, then this minus is absent.
    • The quality of technology. Reographic consoles can interfere, which affects the results. The use of computers eliminates such shortcomings in the study.

    Preparation and conduct of rheovasography of the vessels of the legs and arms

    Preparation for rheovasography of the lower extremities is not at all complicated, however, all the requirements that are presented before the study must be observed.

    • 15 minutes before the study, the patient should completely relax, get a preliminary rest.
    • Those who smoke in two hours should completely eliminate the flow of nicotine into the blood.
    • If you are undergoing treatment with any medications, you must abandon the drugs one day before the REV.
    • When undergoing rheovasography, the limbs should be freed from clothing.

    The process of preparing for the study of peripheral hemodynamics and the rheovasography process itself:

    • Rest in a relaxed state for 15 minutes;
    • Do not smoke more than 2 hours before rheovasography;
    • A day before the scheduled time of the study, stop taking medications;
    • During the research examination of the state of the lower extremities, they should be naked.

    When examined by rheovasography, the patient is in a horizontal position. The skin is degreased with medical alcohol. Sensors for reading information are placed in certain areas.

    The method of RVG of the lower extremities is carried out using a multichannel rheograph device, and rheography can be carried out sequentially in accordance with the examination areas, starting from the far points of the periphery and gradually approaching the center.

    If a study of the upper extremities is performed, then the process of recording the testimony on a rheovasograph is started from the wrist, then in the ulnar notch. If it is necessary to examine the lower leg, then the information sensors are located under the knee fossa and on the ankle joints.

    This procedure of instrumental research in time lasts no more than 25 minutes. Average of 20 minutes.

    This technique allows you to determine the nature of the violation of blood flow:

    • Functional type of violation;
    • Organic character.

    To study the weakened peripheral blood flow, a longitudinal method of attachment is usually chosen (on one surface of the limb), in other cases, transverse (at the same level, but opposite sides).

    reovazografija 2 - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    Varicose veins – an indication for diagnosis

    In certain areas of the body, electronic sensors are sequentially fixed. The skin is pre-disinfected with an alcohol solution. The electrodes have a strict order and absolute symmetry of location. For the examination of the hands, two leads are used: carpal and forearm. Sensors are attached to the elbow and wrist areas.

    According to indications, additional RVG with samples is carried out:

    • Nitroglycerin. Registration of indications is made after taking a certain dose of nitroglycerin, which relieves vascular spasms. In the case when the filling of blood vessels increases (compared with the initial indicators), the sample is interpreted as positive. This means that the disease is associated with impaired organ function. A negative test indicates cellular and structural (organic) lesions;
    • Compression. Diagnostics with a cuff for compression on the thigh. Having increased the pressure, and then, having opened the cuffs, the rate of the recovery reaction and the outflow of blood are estimated. Such a test is used to diagnose diseases of deep veins.
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    Special preparations for the analysis are not required, but to obtain reliable results, certain conditions must be observed:

    • Complete relaxation. Therefore, do not do the procedure after a night shift or in a stressful state.
    • Stop taking medications 1 day before visiting the office. If, due to health reasons, the patient is forced to take medication constantly, it is important to warn the doctor about this.
    • Refuse cigarettes 2-3 hours before the procedure, as nicotine constricts blood vessels.

    Basic Concepts

    IndexNormal rate
    Reographic Index0,04-0,05
    Elasticity index0,2-0,4
    Outflow Index0,2-0,5
    Peripheral resistance index0,45-0,55

    nitroglicerin - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of RvgTo verify the data obtained, before re-examination, the patient takes Nitroglycerin.

    When the interpretation of the RVG data shows a deviation from the norm, then there is a possibility that poor performance can be caused by a short-term spasm or violation of the rules in preparation for the procedure. For confidence in the results, additional tests are prescribed. A pharmacological test is carried out after taking a nitroglycerin tablet.

    The compression test is based on clamping the common artery for a short period of time. Before repeated RVG, the thigh area is wrapped with a cuff into which air is supplied (as when measuring blood pressure). This test makes it possible to assess the speed of the renewal of blood flow during compression compression of the deep vessels of the limbs.

    Name of the studied index Norm in indicators Deviation from the norm
    reographic indexhigher than 0,050less than 0,040ischemic pathology of the study area due to a violation in the filling of arteries with biological fluid
    vascular elasticity indexhigher than 0,40from 0,20 to 0,40moderate elasticity reduction;
    less than 0,20sharp decrease in vascular elasticity
    peripheral resistance indexfrom 0,20 to 0,450more than 0,550sharply overestimated resistance;
    less than 0,15significantly reduced resistance
    venous outflow ratefrom 0,20 to 0,50Less than 0,20easy outflow of venous blood;
    over than 1,50obstructed venous outflow

    By decoding the indicators of the results of rheovasography, one can judge about various pathologies of the body:

    • The reographic index has a normative indicator of no higher than 0,050. The reographic index is sharply reduced to 0,040, indicating a deficiency of the blood circulation system of 1 degree. This is expressed in poor sensitivity to temperature extremes, as well as in lower temperatures of the lower and upper extremities. If the index is lowered more than 0,40, then this condition is critical for the bloodstream system;
    • According to the coefficient of elasticity, we can talk about a violation in the vascular system, as well as in the heart organ;
    • The index of outflow of venous blood from the lower extremities indicates the possible development of thrombophlebitis and clogging of veins with an index higher than 0,50. With this indicator, there is a difficult outflow of venous blood from the lower extremities;
    • The coefficient of resistance coefficient is a standard from 0,20 to 0,450. Everything below this standard, or above it, indicates that there are violations in the bloodstream system. The higher the percentage of deviation, the more serious the pathology develops in the system of blood vessels and the heart.

    The main indicator is considered to be RI: by its size they judge the patency of the riverbed. IPS and HE, in contrast to IE and RI, are only indirect numerical characteristics.

    It should be noted that there are no significant differences in the results of RVG by gender, geography or ethnicity.

    Rheovasography (RVG) is one of the methods of functional diagnostics that allows you to assess the state of blood vessels (tone, blood supply, narrowing, expansion, and more).

    The essence of the method is to register vascular resistance under the influence of weak high-frequency alternating electric currents on the studied area. Through special sensors, the received information (pulses) is transmitted to a special device (rheograph), which converts it into graphic images (rheograms), which are displayed either on the monitor screen of the device or on paper. Next, the results are studied by a specialist and diagnoses the patient.

    To diagnose vascular pathologies of the head and neck, rheoencephalography (REG) is used – a type of rheovasography. The principles for conducting such a diagnosis are the same.

    f43a3659567e7fe88b111f0f04dd4b49 - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    The decoding of the rheovasogram consists in the analysis of indices that constantly change over time:

    • reographic index. Its value reflects the filling of blood vessels with arterial blood. Its normal value should be higher than 0,05. Its value, lower than 0,04 indicates a significant decrease in blood flow.
    • index of elasticity of the vascular wall. Refers to the arterial bed. Its rate should be more than 0,4 units.
    • venous blood outflow index. Its normal range is from 0,2 to 0,5 units. If this index exceeds 0,5 units, then it indicates difficulty in the venous outflow, and is important in the diagnosis of chronic venous insufficiency.
    • peripheral vascular resistance index. Its normal range of values ​​lies in the range from 0,2 to 0,45 units.

    Interpretation of a rheovasogram will be incomplete without performing samples. They are prescribed to identify the reserves of the circulatory system. Samples are usually of two types: chemical and physical.

    • chemical, or pharmacological, drug test – consists in taking nitroglycerin, followed by recording of RVG. After that, the record is compared with the usual one.

    With this test, in the case of vasospasm, nitroglycerin changes the hemodynamic parameters, and the rheovasogram differs from the initial one. In the case of organic stenosis, the sample remains negative, and the curve does not change its nature.

    • For the diagnosis of varicose veins, a physical or compression test is much more important. An elastic cuff is superimposed on the thigh; when air is injected, venous blood outflow is impeded. After depressurization, repeated RVG is performed. The full recovery time after compression allows the assessment of venous outflow reserves.

    The study is aimed at studying the state of the vascular bed. The results are reflected on the monitor of the device in the form of synchronous waves, which are a visual reflection of the fullness of blood in the vascular bed in a particular phase of the cardiac cycle. The results of the study are written in the form of rheography indices:

    • RI or RSI (rheological systolic index);
    • IE (elasticity);
    • DSI (characterizes the magnitude of the outflow and blood flow);
    • PI (peripheral resistance);
    • CA (asymmetry of systolic wave amplitudes) and some others.

    This index, obtained by rheovasography, reflects the total blood filling of the studied body segment. The dependence of the resistance of the segment on filling it with blood is inversely proportional. IE during rheovasography of the extremities characterizes the elasticity of the vascular wall of the studied area, the rest are indirect characteristics of the state.

    A rheogram is just a curve reflecting fluctuations in the resistance of living tissues to high-frequency currents during the cardiac cycle. The main work falls on the shoulders of the doctor, who will decrypt the received digital data. For example, the norm for RI is a value in excess of 0,05 units. RI equal to 0,04-0,05 is considered moderately reduced, and less than 0,04 – sharply reduced.

    For IE, a rate of 0,4 units is considered the norm, a level of 0,2-0,4 units indicates a moderate decrease in the elasticity of the vessel wall of the studied limb, and a level less than 0,2 characterizes its sharp decrease. The outflow of blood, also recorded as an index, is considered normal at indicators at a level of 0,2-0,5.

    Deciphering the results consists in bringing digital indicators to an understandable description of the state of the vascular bed on the studied limb. It is she who allows you to prescribe the correct treatment, monitor the therapeutic effect of the measures taken and track the development of the pathological process.

    Reovasography of the lower extremities is carried out with the aim of studying the quantitative indicators of the state of the vessels. Synchronous wave readings are equal to the heart rate. According to the waves, one can judge the filling of blood vessels, depending on the phase of the heartbeat in a certain time period. As a result of the study, RI (rheographic index) is derived.

    It is calculated by comparing the amplitude of the waves with the height (calibration pulse). The value of RI directly depends on the filling of blood vessels with blood, with its help it is possible to calculate the total intensity with which the organ is filled with arterial blood. The following parameters are also referred to the main indicators: outflow value; elasticity; peripheral resistance.

    After receiving the reovasogram, the decryption time comes, which is carried out by a qualified specialist. This is the main point of the study, all pathologies are discovered here and the question of further treatment is being resolved. The interpretation of rheovasography of the lower extremities includes the following important points:

    • The main emphasis is the study of RI. A value of 0,04 indicates a sharp decrease in the norm, an index of 0,04-0,05 indicates a moderate decrease. RI above 0,05 is considered normal.
    • The elasticity index (IE). A sharply reduced indicator is less than 0,2. Moderately reduced – 0,2-0,4. Normal is 0,4.
    • To determine the outflow of blood in the vessels, calculate the corresponding index, the norm of which is 0,2-0,5. If the value is less, the outflow is facilitated; an indicator above 0,5 indicates difficulties in outflow.
    • Indicators of peripheral resistance: more than 0,55 – overstated; less than 0,15 – underestimated. The norm is 0,2-0,45.

    If the patient complains of discomfort in the limbs, pain, cramps or persistent numbness, the doctor notes a cooling of the hands and feet, pallor of the skin, he may suspect a violation of hemodynamics in these parts of the body. To confirm or refute the diagnosis, rheovasography is prescribed.

    Rheovasogram decoding

    The decoding of the graphic image is based on a comparison of the normal values ​​of the control indices with the indicators of the obtained curve.

    IndexProcess under studyStandardChanges
    P-index (rheographic)intensity and rate of filling the vessel with arterial blood0,05 and abovea reduced index indicates ischemia (inadequate supply) of blood vessel
    VO index (venous outflow)freedom of venous blood outflow0,2-0,6a lower indicator means the expansion of the vessel, high – is fixed in case the venous valve does not work
    PS index (peripheral resistance)total blood flow resistance of arterioles (small arteries)0,2-0,45an index below the norm is an indicator of the expansion of arterioles, a high index corresponds to arteriole stenosis or complete closure of capillary blood flow
    E-index (elasticity)extensibility and elasticity of the vascular wall0,2-0,4low indicator means increased stiffness of the walls due to atherosclerotic deposits

    The wave-like curve in the rheovasogram is estimated by the width, height, synchronism of the heart rhythm, the amplitude of the oscillations. The stage of arterial insufficiency is evaluated according to the Fontaine-Pokrovsky classification scale:

    • Compensated or initial. A slight deterioration in the RI and IE indicators downward. Symptoms are expressed in rapid fatigue, severity, decreased sensation in the legs, freezing of the limbs.
    • Subcompensated or intermittent claudication. Pain occurs when walking. Index indicators are reduced.
    • Uncompensated or painful. The digital parameters of the indices are greatly reduced. The pains are continuous, areas of tissue necrosis, ulcers appear.

    The results of the examination do not depend on the ethnic or gender affiliation of the patient.

    reovazografija 3 - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    Superimposed sensors for upper limb rheovasography

    Rheovasogram, or a gram of the brain – the encephalogram has the type of teeth, as with a cardiogram. The main teeth of the rheovasogram go down, and there are additional teeth.

    If the vessels are in a healthy state, then equal oscillations go down. The ascending part of the rheovasogram indicates the ability to reduce vascular walls. The downward curve indicates the ability of the walls to stretch under the pressure of the incoming blood.

    The rheovasography curve is inextricably linked to the systole of the heart organ, so the sensors are also connected to the ECG apparatus.

    With sclerosis of the lower extremities, the teeth do not expand, but their height decreases.

    With obliterating endarteritis, an expansion of the tooth complex occurs.

    A rheovasographic study of the blood flow system also involves conducting tests to identify the root causes of the pathology of blood circulation, factors of latent deviations and disorders.

    Methodology

    Definition

    To identify hidden pathologies, functional pharmacological tests can be used:

    • Nitroglycerin. After resorption of nitroglycerin, RVG is performed, after which the result is compared with the usual one. This is necessary in order to distinguish between organic contractions and functional spasms.
    • Compression. Used in the study of deep vein thrombosis. For comparison with the usual indicators of RVG, a cuff is placed on the thigh and indicators are fixed after it is removed.
    • Cold. It is carried out to diagnose various pathologies in the hands. Cold water is applied. The rheogram is removed three times after a certain time, the results of the restoration of blood flow are compared, conclusions are drawn. Negative test – on the restoration of RI in the 7th minute. Positive test – slow recovery up to 30 minutes.

    4c3482c809b09273a919b4bdd3489da7 - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    Biological fluid blood is a good conductor of electrical impulses, and muscle tissues resist the passage of an electric wave. The best indicator of resistance is the bone tissue of the human body.

    There are certain normative indicators and deviations from the standards can be obtained in the decoding of the rheovasography method.

    The following indicators are determined:

    • Image of the state of the studied vein, or artery;
    • The shape of the blood vessel and its direction are detected;
    • The inner and outer diameters are calculated, and its degree of expansion under the influence of pathology, as well as narrowing;
    • Vascular tone is detected;
    • The ability of blood vessels to contract;
    • Phases from filling with biological fluid;
    • The outflow of biological fluid from the lower extremities;
    • Symmetry in blood flow to all limbs;
    • Found connecting shunts with other vessels, as well as anastomoses of arteries.

    There are 2 types of functional tests in the study of rheovasography:

    • Nitroglycerin type of sample – after taking a dose of Nitroglycerin, after a time interval of 5 minutes, any deviation is measured at the time of vascular spasm. If there has been an increase in blood flow in the system, then the elasticity coefficients and the rheography index increase. This test is positive and functional. If there is no dynamics in spasms, then organic damage to the walls of the arteries is manifested;
    • A compression test is a fairly important diagnosis for thrombosis of the veins of the legs that lie deep ins >0d7bbd7f720294ba0eb682b893ad0d19 - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    The main indicators calculated by rheovasography:

    • Rheographic index (ohm), reflects the intensity of arterial blood filling of the studied area.
    • The elasticity index (IE) characterizes the elasticity of the arteries of the studied area.
    • The peripheral resistance index indirectly reflects the peripheral vascular resistance of the examined area.
    • The outflow index (VO) is used to indirectly evaluate venous outflow.

    To distinguish a functional vasospasm from organic stenosis (narrowing), a nitroglycerin test is used. For this, RVG is recorded in the normal state of the patient, then the test person takes a nitroglycerin tablet (0,5 mg) under the tongue. Recording is repeated after 3-5 minutes. A sample is considered positive if the elasticity index and rheographic index increase (by 0,01 ohms).

    To diagnose deep vein thrombosis of the lower extremities, a compression test is used: a cuff is placed on the patient’s thigh, then it is removed and the recording is repeated. The condition of the vessels of the venous bed is assessed by the rate of restoration of the venous outflow after removal of the cuff.

    Altered parameters recorded using rheovasography do not necessarily indicate damage to the walls of the vessels. Signs of a blood flow disturbance can be caused by a spasm that is episodic (functional) in nature: this result can be obtained if the rules of preliminary preparation are not observed.

    As an objective way to assess the condition of the arteries and veins of the legs, the quality of blood flow, reovasography of the lower extremities is used. With its help, the pulse filling of blood vessels with blood is measured, that is, how effectively during the heart contraction blood fills the vessels of the legs. In addition, the doctor assesses the tone of the walls of arteries and veins, the patency of large and small blood vessels.

    Getting Results

    With the help of rheovasography, the doctor can examine the veins of the limbs

    Rheovasography of the lower extremities is no different from the test of other organs aimed at studying and evaluating the elasticity of blood vessels, as well as their filling with blood. This procedure allows you to localize areas with partial or complete blockage of the vessel.

    It is based on the resistance of tissues to an alternating current value applied at a high frequency. The studied area is considered a heterogeneous electrical conductor.

    388ccb90e2fd102e69a76f26c83a21ad - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    A tissue saturated with blood is an ideal conductor, and it is just the conductivity of the electric current through it that shows rheovasography.

    For the procedure, special electrodes are used

    The procedure is carried out to prevent and diagnose many diseases, but at the first sign it is worth immediately contacting a doctor. These include:

    • numbness in the arms or legs;
    • feeling of cold in the limbs;
    • persistent cramps;
    • discoloration of the skin.

    In the case of varicose veins, rheovasography is an integral part of diagnostic actions.

    Rheovasography of vessels of the lower extremities requires the implementation of certain rules that exclude factors affecting the vessels during the procedure:

    • 1 day before the proposed examination, finish taking anticoagulants and other drugs that can affect the patency of the vascular system.

    It is important to quit smoking before the procedure

    • 8-10 hours to refrain from cigarettes, chewing or snuff, as well as from nicotine gum.
    • 2 hours do not eat and do not exercise actively.
    • 20 minutes to be calm in the bed where the study will be conducted.

    Other instructions may be given by the attending physician, depending on the type of procedure.

  • The patient is laid on the bed (couch, gurney).
  • The study site is wiped with medical alcohol (degrease).
  • Attach sensors.
  • They start the device.

    The procedure is completely painless and has no consequences. It will take about 15-25 minutes. During the holding, the patient should be at rest.

    What is the norm

    Rographic Index: 0,05 Ohm and above

    Peripheral Resistance Index 0,2–0,45

    Indications may vary, depending on the characteristics of the person. Therefore, the norm is determined on the basis of many studies.

    Rheographic index determines the effectiveness of venous outflow. An increased result in decoding indicates violation and deterioration. The elasticity index determines the state of arterial vessels. With a decrease from this norm, a deterioration in blood flow is diagnosed, and with an indicator of less than 0,2 – urgent hospitalization.

    The index shows the level of outflow of blood in the veins. Almost similar to the rheographic indicator and is required for additional diagnostics. The peripheral resistance index is characterized by the effectiveness of small vessels.

    Rheovasography of limb vessels is used to diagnose and fully assess damage in case of injury or the consequences of the disease. It is carried out for:

    • diagnosing circulatory system disorders;
    • definitions of vascular pathologies;
    • diabetes prevention;

    This method is used in the diagnosis of heart disease.

    • confirmation of Raynaud’s syndrome;
    • diagnosis of varicose veins;
    • assessment of the consequences of injuries of the cervical spine;
    • diagnostics of blood vessels of the head;
    • definitions of heart disease (ischemia or stroke);
    • diagnosing blockages and narrowing of veins (thrombophlebitis).

    The procedure can be a preventive step for many people aged, because over the years the vessels lose their tone, and rheovasography will help prevent undesirable consequences.

    It is worth noting that violations are classified into 2 types:

    • Acute. It is characterized by headache, sharp numbness of the facial muscles, visual impairment. There may be problems with memory, speech, and coordination. Manifestation due to excessive blood flow created by blockage of blood vessels in the neck or head. In case of problems in the lower extremities: sharp pains in the area of ​​blockage, lameness, convulsive processes.

    In the acute phase, the patient may complain of cramps

    • Chronic. It is characterized by the development of ischemia and vein disease. Often the symptoms are ignored, as swelling, numbness or pain appears after physical exertion. A person associates the process of developing a disease with ordinary fatigue.

    ece2724f8e01b75cc85cfb5a2b14243a - What is lower limb rheovasography, when is it prescribed and how to prepare for the diagnosis of Rvg

    Rheovasography of the extremities has no contraindications, except for large skin lesions throughout the area.

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    Normal indicators of RVG and their changes

  • Svetlana Borszavich

    General practitioner, cardiologist, with active work in therapy, gastroenterology, cardiology, rheumatology, immunology with allergology.
    Fluent in general clinical methods for the diagnosis and treatment of heart disease, as well as electrocardiography, echocardiography, monitoring of cholera on an ECG and daily monitoring of blood pressure.
    The treatment complex developed by the author significantly helps with cerebrovascular injuries and metabolic disorders in the brain and vascular diseases: hypertension and complications caused by diabetes.
    The author is a member of the European Society of Therapists, a regular participant in scientific conferences and congresses in the field of cardiology and general medicine. She has repeatedly participated in a research program at a private university in Japan in the field of reconstructive medicine.

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