Interferential Current (IFC)
Interferential Current is a type of electrical stimulation that uses paired electrodes of 2 independent circuits carrying high-frequency (4,000 Hz) and medium-frequency (150 Hz) alternating currents. The superficial electrodes are aligned on the skin around the affected area. It is believed that IFS permeates the tissues more effectively and, with less unwanted stimulation of cutaneous nerves, is more comfortable than transcutaneous electrical stimulation (TENS). Interferential stimulation has been investigated as a technique to reduce pain, improve range of motion, and treat a variety of gastrointestinal disorders. There are no standardized protocols for the use of interferential therapy; the therapy may vary according to the frequency of stimulation, the pulse duration, treatment time, and electrode-placement technique.
Interferential Current is used to reduce pain, promote healing of soft tissue, decrease local swelling, and aid in the restoration of normal movement. By sending electrical impulses through electrodes in the tissue in the area of pain, it changes the firing of the nerves and their conduction of pain signals to the brain. IFC also increases local blood flow which can improve healing by reducing swelling and as a result helps to remove damaged tissue and bring nutrients necessary for healing to the injured area.
Most treatments last ten to fifteen mintues and patients descried as relaxing with a ‘pins and needles’ sensation. This feeling should be strong but not strong enough that it feels painful.
IFC should not be used on patients with pacemakers or cancer. It should also not be used over the uterus, pelvis, or lumbar spine of a woman who is pregnant.