Applying the tecar current (alternating sinusoidal current with frequency between 300 kHz and 1.2 MHz) to a part of the human body is the equivalent of applying the tecar current to an impedance – the equivalent of applying the tecar current to an electrical circuit made up of a resistor and a condenser in parallel.
In Resistive mode, the lower frequency current flows through the resistive parts of the body (bones, ligaments, important tendons etc.). The resistive mode concentrates the energy mainly on the hard tissues, such as joints, ligaments, tendons and bones.
In CApacitive mode, the higher frequency current mainly flows through the capacitive parts of the human body (muscles, etc). The CApacitive mode concentrates the energy mainly on the soft tissues such as muscles and areas with high liquid content.
The Resistive and CApacitive modes and their ability to concentrate energy in hard and soft tissues respectively depend on the frequency of the tecar current and not on the use of a different type of plate. The insulated plate is covered in a suitable material which does not increase impedance. The flow of the tecar current through the insulated plate causes an increase in the temperature of the plate which is proportional to the thickness of the coating and which depends on the type of insulation used. – changes the thermal sensation on the surface of the treatment but does not change the way in which the tecar current interacts with biological tissues and the way in which the energy is concentrated, which is a function of the frequency.- Being another impedance positioned between the device and the biological tissues, causes a loss of power/energy which is dissipated from the plate and not released to the relevant biological tissues.