â The remittance advice was included as part of the 200 page document that fully explained the details of the business relationship.
TENS is commonly used to help with chronic pain. The general type of electric stimulation is used for healing wounds and alleviating pain. For the convenience of the patient, a portable TENS unit can be prescribed by the doctor or a physical therapist for the patient to use at home. Interferential current (IFC) is another form of TENS.
Already many good answers, but I would like to add this one to show how electrophysiology makes it more confusing. Compare a battery with a stimulator - a device used to stimulate excitable tissues such as nerves or muscles. Both have an anode and a cathode. A battery is a charge-separating device.