INDUCTOTHERMY

From Big Medical Encyclopedia

INDUCTOTHERMY (Latin inductio targeting, introduction + grech, therme warmth) — a method of electrotreatment, at Krom affects an organism of the patient variation high-frequency magnetic field. And. it is applied as an independent method of treatment or (more often) as a component of complex therapy.

The old name of the «short-wave diathermy» method which is found sometimes in literature is unauthorized: though heat effect at And. it is close to the same effect at diathermies (see), wavelength at And. much well, and the patient is influenced by the induced magnetic field, but not contact alternating current, as at a diathermy.

As body tissues of the person have conductivity, at influence the induction (induced) currents having character of circular circuits — vortex currents, or eddy current arise high-frequency variation magnetic field in them. Vortex currents represent the directed fluctuations of charged particles of fabrics, preferential extracellular and intracellular ions, about their average situation. Emergence of vortex currents is followed by formation of heat, a cut arises owing to collision of the fluctuating ions with the particles of the environment surrounding them.

Action of high-frequency magnetic field at its same tension leads to unequal heat generation in various fabrics depending on their physical. characteristics. The greatest formation of heat is noted in the fabrics having higher conductivity — fluid mediums of an organism (blood, a lymph), parenchymatous bodies (kidneys, lungs, a liver, a spleen), in bodies of a small pelvis, muscles.

In addition to thermal action, variation magnetic field exerts also specific impact on biol, objects, caused by the frequency of fluctuations of magnetic field and consequently, the frequency of fluctuations of interstitial ions and called in physical therapy by non-thermal ostsillyatorny effect which is explained by the ionic theory of excitement of P. P. Lazarev. Oscillations (fluctuation) of intracellular ions cause periodic change of concentration them in cellular covers. It causes excited state of cells, first of all nervous as the most sensitive to any irritations, as extent of this or that response to the procedure defines.

Under influence And. in an organism there are difficult physical. - chemical changes. In a zone of influence And. temperature of fabrics increases, the spasm of capillaries is removed, arterioles and larger vessels extend that is confirmed by improvement of indicators of plethysmograms, reogramm.

During the carrying out And. in the sparing doses (small and medium thermal influences) blood supply, indicators of a hemodynamics improves (including microcirculation), at patients with an idiopathic hypertensia it can decrease or be normalized raised by the ABP, raise sokratitelny ability of a myocardium. In adjusted dosage And. promotes a rassasyvaniye of the inflammatory centers, increase in activity and intensity of phagocytosis, decrease in the raised tone of cross-striped and unstriated muscles; redoxreactions are stimulated, exchange and trophic processes in fabrics amplify. Procedures I. influence neurohumoral system, in particular function of adrenal glands that is shown by increase in synthesis of glucocorticoids and their release from the proteinaceous and related structures; impact on area of a liver, gall bladder is followed by strengthening of bile secretion, improvement of glikogenoobrazovatelny function of a liver. And. has the systemic sedative and analgesic effect since excitability of the central and peripheral nervous system goes down.

Indications and Contraindications

Indications: bronchitis, pneumonia, hepatitis, cholecystitis (not calculous), a peptic ulcer of a stomach and duodenum, a spastic colitis (all listed diseases in subacute stages), bronchial asthma (in a stage of an aggravation and incomplete remission), diseases of a musculoskeletal system of traumatic, inflammatory, exchange and dystrophic genesis (fractures of bones after reposition, a pseudorheumatism at the minimum and average degree of activity of process, the traumatic and deforming arthrosis, a radicular syndrome of intervertebral osteochondrosis), effects of traumatic damage of peripheral nerves, a diabetic polyneuritis (at a pain syndrome and for stimulation of processes of regeneration), hron, an adnexitis, a perimitritis (in a phase of infiltrative and commissural changes), cystitis, prostatitis (in the subacute period), initial stages of a Raynaud's disease, an endarteritis, an idiopathic hypertensia of I and IIA of stages.

Contraindications: acute purulent diseases, new growths, acute disorders of cerebral and coronary circulation, passing disturbances of cerebral circulation, hron, coronary heart disease, cardiovascular insufficiency of II and III stages, an idiopathic hypertensia are higher than IIA of a stage, bent to bleedings, diseases of bodies of a hemopoiesis, an active pulmonary tuberculosis, pregnancy of all terms.

Devices for an inductothermy

Fig. 1. The device for an inductothermy (IKV-4): 1 — the inductor, 2 — the cable connecting the inductor to the case (3).

Use the domestic devices DKV-1, DKV-2, DKV-2M and IKV-4. The device DKV-2M generating the frequency 13 56 MHz, represent the two-cascade high-frequency generator reporting energy of fluctuations to an output (therapeutic) contour. Connect one of three inductors which are included in the package to output nests of the last: cable, small or big disk. The device IKV-4 (fig. 1) works at the same, as DKV-2M, frequency. Directly replaceable working elements can be connected to output nests of the device: resonant inductor big or small, inductor cable and ginekol, applicators. The last are connected to the device via the special device. Resonant inductors and ginekol. applicators do not demand setup in use, the cable inductor is adjusted by means of the handle of setup.

Technique

Procedure I. patients accept lying on a wooden couch or sitting on a special wooden chair (at the Urals, or ginekol, diseases). During the procedure do not undress, all metal objects delete from clothes. Depending on a disease influence is carried out on a zone of a projection patol, the center (e.g., at arthritis, radiculitis — on the respective site of an extremity or backbone, at an attack of bronchial asthma — on interscapular area) or on a reflexogenic zone (e.g., at a Raynaud's disease or the deforming osteoarthrosis — on a zone of a segmented innervation in lumbar department of a backbone; on area of a projection of adrenal glands for the purpose of stimulation of their function — at a pseudorheumatism, bronchial asthma in the mezhpristupny period).

Fig. 2. Position of the inductor disk during the carrying out an inductothermy on area of a stomach.
Fig. 3. Position of the inductor cable during the carrying out an inductothermy on a shoulder joint.
Fig. 4. Position of the inductor cable during the carrying out an inductothermy on area of a liver.

Depending on a zone of influence use the inductor cable or the inductor disk (fig. 2). It is possible to make of the inductor cable just before the procedure several forms of the coils convenient for carrying out And. on area of a thorax, stomach, on a joint (fig. 3), on area of a projection of various bodies (fig. 4). At production of various forms of coils it is necessary to follow a number of rules: rounds of the coil shall defend from each other on 1 cm that is provided with dividing combs, number of rounds of the coil depending on a zone of influence from 1 to 3; the free ends of a cable shall be identical on length and not less than 1, between a body surface and the inductor the air gap of 1 — 2 cm is created.

Procedures dose on thermal feeling of the patient, and in DKV devices and in size of anode current of generating lamps that is reflected indications of the milliamperemeter in the control panel. Apply weak (to 180 ma), averages (180 — 220 ma) and strong (220 — 240 ma) thermal doses. The choice of a dose, duration of the procedure and frequency of its carrying out depend on a zone of influence, expressiveness patol, process and age of the patient. So, at children and elderly people use weak and average thermal doses. Averages and strong thermal doses apply in treatment hron, inflammatory processes of bodies of a small pelvis, diseases of joints of the lower extremities. Procedures lasting 10 — 15 — appoint 30 min. every other day or daily, to a course 10 — 15 procedures. And. it is compatible with to lay down. heat baths and souls, impulse currents of low frequency, massage, LFK it is also incompatible with UVCh-and microwave therapy, phototherapy, ozokerito-, a paraffin therapy and mud cure (if mud applications impose on big body parts).

The combined techniques

In some cases for strengthening of action And. apply in combination with other methods of physical therapy — a galvanoinduktotermiya (simultaneous action of a galvanic direct current and P.), induktoelektroforez (the combined action And., a direct current and the entered medicinal substance), a mud-inductothermy (the combined effect of dirt and And.), gryazeinduktoforez (combined effect of dirt, direct current and inductothermy).

The combined techniques apply preferential at treatment hron, an adnexitis, peri-and a parametritis, prostatitis, the deforming spondylosis, radiculitis, a plexitis, etc. to rendering more expressed influence. At a galvanoinduktotermiya on area of influence impose a galvanic electrode (hydrophilic laying and a lead plate), then over an active electrode install the inductor disk (e.g., in a stomach, a waist). At impact on joints galvanic electrodes cover with an oilcloth, then a towel, and atop have the inductor cable. If the technique of an induktoforez, then iod hydrophilic laying is used place the filter paper moistened with medicinal solution. At a mud-inductothermy on skin impose mud weight, over it place an oilcloth and a towel, and then install the inductor disk (on a trunk) or the inductor cable (on an extremity). In a technique of a gryazeinduktoforez on mud flat cake place a galvanic electrode, atop an oilcloth, a towel and then the inductor. The device of a galvanic current and the device I are necessary for holding procedures. At first turn on the device P., then the device of a galvanic current. Switching off is carried out upside-down.


Bibliography: Questions highly - ultravy-soko-and a superhigh-frequency electrotherapy, under the editorship of Yu. E. Danilov, page 5, 25, M., 1971; Liventsev H. M flee silt neon A. P. Electromedical equipment, M., 1974; The Reference book on physical therapy, under the editorship of A. N. Obroyeov, page 67, etc., M., 1976; Shane A. N. Inductothermy as medical method, M., 1970.

A. N. Sheyna; V. A. Gavrilin (medical tekhn.).

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