Alternating currents of sound frequency or interference currents can be used in medical circles in a treatment technique called interference therapy. In this technique, such currents can be generated by combining several alternating currents with the same amplitude and almost the same frequency. The term "interference" itself characterizes the mutual amplification or attenuation of the amplitudes of adjacent waves when they are superimposed on each other. Such a therapeutic technique was first applied in 1949 by a German G. Nemek, therefore, the alternating current arising from interference is called today the Nemeck current.
Interference therapy is useful for the body in that during its course blood flow, microcirculation are significantly improved, the tone of all vessels in the body is normalized. When conducting such therapy in the body, the formation of bypass pathways of blood flow occurs, with the help of which there is an influx and outflow of blood when thrombosis occurs. Also, interference therapy helps to reduce the activity of the sympathetic parts of the nervous system and enhance the production of vasoactive substances.
The massage effect from wave effects occurs due to the stimulation of contractions of the internal muscles in various organs, which ultimately leads to accelerated lymph circulation and peripheral blood flow. The temperature in the place where the interference waves act, rises, oxygen begins to flow more actively in the tissue, saturating them, anoxemia is eliminated, toxins go away, the work of the reticulo-endothelial system is activated.
Interference therapy leads to processes of displacement of hydrogen indicators of acidity towards alkaline data, which indicates a decrease in inflammatory processes in the human body. In the structure of neuromuscular tissue, low-frequency currents can create excitement, and frequency currents from 50 to 100 hertz positively affect the nutrition of cells in tissues, the circulatory system and strengthen muscle tone.
Interference therapy is known for its analgesic, muscle relaxant properties, the ability to normalize the functioning of the autonomic system, to eliminate swelling of the pruneural tissue in the body. Many experts argue that with the help of interference therapy it is possible to achieve bacteriostatic, trophic-generating and bactericidal effects on the human body.
Possible indications and contraindications of interference therapy
The main indications for prescribing a patient to interference therapy are numerous diseases of the nervous system, such as:
- Raynaud and Ankylosing spondylitis;
- autonomic dysfunctions and vibrational disease;
- ganglioneuritis, neurasthenia, neuritis of the facial nerves or traumatic nature;
- causalgia, myelopathy, phantom diseases;
- glossopharyngeal or trigeminal neuralgia;
- enuresis, tunnel syndrome;
- neurological consequences of osteochondrosis;
- toxic or diabetic polyneuropathy;
- consequences of traumatic brain injury.
But not only diseases of the nervous system are a direct indication for interference therapy. Many other diseases also noticeably recede during this treatment. It effectively affects patients with diseases and injuries of the musculoskeletal system, gastrointestinal tract, cardiovascular system, with inflammatory processes in the pelvic and uterus, and some diseases of the skin.
The main contraindications for interference therapy, doctors include the presence of a patient implant in the form of a pacemaker, diseases such as epilepsy, glaucoma, tuberculosis, fever, thrombophlebitis, Parkinson's disease. It is impossible to carry out interference therapy if the patient is prone to bleeding, with poor blood coagulation, with cancer, in the stage of acute inflammatory processes, with non-fixed fractures inside the joints, various wounds on the skin at the site of exposure, with urolithiasis and cholelithiasis, as well as with multiple sclerosis and pregnancy.
Features of interference therapy
Interference therapy itself is a technique for using mid-frequency alternating currents to penetrate tissues to irritate receptors in their deeper layers. In the pathology zone, at least two different wave signals must intersect. The frequency of one of the currents is 5000 hertz, and all others must be in the frequency of 3000 to 5000 hertz. When they cross, another low-frequency current is formed with a frequency of 0 to 100 hertz. At this moment, in the place of application of currents, the patient may feel beating, vibrational movements, however, painful sensations do not occur.
During interference therapy, the patient should sit or lie down. The current is supplied using several pairs of independent electrodes generated by various generators. The generators are placed so that their dislocation can ensure that the currents cross in the right place - the impact zone. Most often, the electrodes are located in the same plane, but sometimes their effect is more directed when located on different sides of the human body.
Sometimes kinetic interference therapy is used, which implies the distribution and movement of 2 of 4 electrodes in the human body, which leads to a wider effect relative to the area of the skin.
The current strength during interference therapy should be equal to 30-50 milliamps, which is dosed based on the subjective feelings of the person undergoing therapy. A normal feeling is vibration or light pain in the area where currents work. Stronger sensations can become addictive to the effects, so they are not recommended to be achieved during therapy.
Waves of various sizes are capable of exerting various effects during interference therapy, for example, a frequency current of 100 hertz can be an antispasmodic, anesthetic, it enhances the tone of the parasympathetic nervous system. A current with a frequency of 25 hertz has neuromyostimulating properties, and currents from 1 to 5 hertz help to reduce muscle tissue, enhance sympathetic tone, and awaken vegetative nerve fibers.
For acute forms of various diseases, a weaker current is used, and in cases with chronic diseases, currents are used at a higher frequency. Also, the strength of the current is inversely proportional to the severity of the pain syndrome - the stronger the patient has pain, the weaker the current is needed in this case.
The procedure of interference therapy is carried out daily or with a frequency of once every 2 days courses. Each course includes from 10 to 15 procedures and can be repeated 2 weeks after the end of the previous one. In cases of chronic diseases, 1 session takes about 30 minutes of time, and in acute phases of the disease, interference therapy lasts up to 15 minutes each time.