Determination rheography: Summary
Rheography - diagnostic method in which examines blood flow in specific organs and tissues, and the whole body in general. The bottom line is rheography graphic recording with the help of a special device - rheograph - changes in the electrical conductivity of the body, caused by the pulse fluctuations of blood flow.
Among all the structures of the body blood has the highest electrical conductivity. This means that during systolic contraction of the heart when the blood flows into nearby bodies electrical conductivity of these parts of the body will be high and the moment of cardiac muscle relaxation (diastole), opposite - low. Based on the testimony rheograph output curve of pulse oscillation, called rheogram.
Rheography - non-invasive method that is harmless to the body. Indeed: no tampering occurs. The skin and tissues are not damaged, as transmitted through them, an electric current is so small magnitude and frequency that is just not able to do any significant damage.
Harmless - is not the only advantage rheography. This method has a high sensitivity. Rheography to evaluate the overall condition of the blood supply, blood disorders identified as a separate body, whether it is the brain, the kidneys or the liver and the whole organism.
What is Rheograph?
Basis rheograph - power generator and a nozzle for transfer of measurements in graphic form. Rheogram recorded with metal electrodes applied to target areas of the body. Before rheographs between the electrode and the surface of the patient's body tissue is placed pad soaked in a solution of sodium chloride (it will improve their mutual contact), and the skin itself is wiped with an alcohol solution to remove the fatty film.
What can be seen on rheogram?
Rheogram looks sinusoid with a steeper rise characterizing arterial blood flow and smooth descent, which, in turn, is a reflection of venous flow. To thoroughly analyze the state of blood flow during reography necessary to remove a lot of curves. An experienced diagnostician will pay attention to the regularity of the curve (the similarities between several curves) and its shape, presence and amount of additional curves in a downward phase. Thus, for example, vascular dystonia and arrhythmias adjacent curves are different in shape.
In addition to the external characteristics of the curves, the doctor decides to several mathematical problems: special formulas calculated rheographic index, for which a certain interval, when going beyond which one can judge the presence of pathology, and a few other parameters (amplitude-frequency rate, the rate of venous outflow, pulse wave propagation time).
Central rheography: heart function under a magnifying glass
Central rheography - study blood flow in the pulmonary artery and the aorta - a great way to evaluate the work of your heart. As blood supply light and right ventricles are judged on the state of the contractile function of the heart. Normally rheogram pulmonary artery as follows: sloping upward part (in this segment of the aorta rheogram steeper), round tip with a small "dimple" or more wave and smooth descent. When conducting central rheography the following types rheograms depending on the state of blood flow into the heart and lungs:
- hypervolemic (increased volume of blood flow). On rheogram is reflected higher peaked curve with a steep downward part;
- hypovolemic (reduced blood volume). The height of the curve is reduced at its ascending part appears "serifs" peak - flat, descending part becomes flatter;
- hypertonic (higher pressure in the vessels of the lungs). The curve has a steep slope, a round top and a gentle slope.
Rheography rheovasography vessels or to evaluate the blood flow in blood vessels in the periphery, i.e. in the limbs. The main "target" rheovasography - Containers shoulder forearm, hand (upper limbs), thighs, calves, feet (lower limbs). Rheography vessels conducted in the same manner as described above: use rectangular or ribbon electrodes underneath the skin is treated with a solution of sodium chloride or a special conductive gel. To examine the blood flow at any particular section (shoulder, thigh, etc.), one electrode is applied at the beginning of this section, and the other, respectively - at the end. For example, if we talk about the lower leg, that these points will be the area of the ankle and popliteal fossa.
Wave at normal rheogram has a steep ascending part, round crown and a gentle descent from possible additional waves. Using rheography vessels can, for example, to put such a diagnosis as occlusive disease, or as it is called, "smoker's leg": a chronic disease that affects the arteries of leg and foot. On rheogram it is reflected in the reduction of the height of the curve, flattening the top, no additional waves.
Thus, if there are preconditions or suspected problems with peripheral vascular disease (loss of tone and elasticity, luminal narrowing or blockage), then rheography vessels able to answer the urgent questions.