Description
The basic principal of electrotherapy interferential therapy machine (ift) is to utilise the stung physiological portable interferential effects of low frequency (<250pps) electrical stimulation of nerves without the associated painful and somewhat unpleasant side effects somewhat associated with low frequency stem to produce low frequency effects at sufficient intensity at depth, patients can experience considerable ddiscomfort in the superficial tissues (i.e.the skin ) this is due to the impendence of the skin being inversely proportional to the frequency of the stimulation in other words the lower the stimulation frequency, the greater the impendance to the passage of the current is pushed into the tissues against this barrier. the skin impendance at 50hz is approxiately 3200* whilst at 4000hz it is reduced to approximately 40*. the result of interferential machines applying a higher frequency is that it will pass more easily through the skin requiring less electrical energy input to reach the deeper tissues & giving rise to less discomfort.
