Low-frequency magnetotherapy. Low-frequency magnetotherapy is a therapeutic and prophylactic way to use the magnetic component of various types of low frequency alternating electromagnetic field. For medical purposes, alternating, pulsating, pulsed, rotating, and travelling low-frequency magnetic fields are mainly used.
Low-frequency magnetic fields exert various effects on the body and the course of pathological processes, the basis of which is the magnetomechanical effect and induction of electric fields and currents in tissues.
Low-frequency magnetic field enhances the synthesis and release of releasing factors in the hypothalamus and tropic hormones in the pituitary, which leads to stimulation of the peripheral endocrine glands, thereby contributing to an increase in the body’s ability to resist the adverse factors.
The basis of the therapeutic effect of low-frequency magnetotherapy in the treatment of various diseases is the activation of local blood circulation, which improves blood supply and stimulates the metabolism in various organs and tissues. The basis of these changes is the improvement of microcirculation due to the direct influence of the factor on the formed elements and plasma proteins, as well as blood viscosity. The low-frequency magnetotherapy causes an increase in blood heparin, which can influence many vascular and tissue reactions in the body. An improve in blood supply also contributes to vasodilator action inherent in low-frequency magnetotherapy due to relaxation of peripheral vascular smooth muscles. Therefore, low-frequency magnetic fields have an antihypertensive effect that is especially pronounced in general magnetotherapy.
The trophic effect of low-frequency magnetic fields is not only due to their influence on the organs and tissues perfusion, but also to certain intracellular processes. In particular, magnetic fields stimulate the electron transfer along the phosphorylation pathway and the ATP synthesis, and also improve the constructive function of the cell inducing activation of protein synthesis.
Inflammation is reduced under the influence of low-frequency magnetic fields. The anti-inflammatory effect is associated with the influence of the physical factor on the synthesis of prostaglandins, increased heparin levels in blood and tissues, and inhibition of the release of histamine and other allergic and inflammatory factors from mast cells and basophils. Such changes caused by low-frequency magnetotherapy as increased vascular permeability, improved microcirculation and transcapillary exchange, and the influence on immunological processes in the body also take part in this effect.
Low-frequency magnetotherapy is also associated with anti-edematous action (mainly due to stimulation of the lymph drainage) and mild analgesic effect. The anesthetic action is based on the fact that the impulse from the pain area stops due to the positive shifts that occurred in it caused by the magnetic field. It is also believed that the analgesic effect is associated with a change in the functional properties of neuronal membranes, an increase in the transmembrane resting potential and the threshold of excitation of peripheral nerves, and an increase in the production of endorphins.
Therefore, the main therapeutic effects of low-frequency magnetotherapy are vasodilative, anti-inflammatory, trophic-stimulating, anti-edematous, hypotensive, and hypoalgesive (pain relief) effects.
The magnetic coil solenoid installed in the AndroSPOK magnetophotobarotherapy apparatus generates a low-frequency (10 Hz) pulsed magnetic field of a special shape (40 Hz – 200 Hz). The penetration depth of the magnetic field is up to 10 cm.
Figure – The magnetic field in the AndroSPOK magnetophotobarotherapy apparatus