Effectiveness of Two Electrotherapy Techniques to Treat Subacromial Impingement Syndrome

"The group with TENS received electrical stimulation (Endomed 182, Enraf-nonius, Germany) at a frequency of 80 Hz and with a pulse width of 150 ns. The TENS was applied by using 4 surface electrodes (5x5 cm Prim-Trode, Spain) into two channels: supraspinatus fossa and the insertion of the rotator cuff (channel 1) and V deltoid (channel 2). The current intensity was set 3 times during each session according to each patient's sensitivity. Current was strong but it did not exceed the threshold of pain."

"The group with IC received a base frequency of 4000 Hz (Endomed 182, Enraf-nonius, Germany) with an amplitude-modulated frequency (AMF) and slope of 1/1 in tetrapolar mode, as previously indicated. For IC, the same number and type of surface electrodes (5x5 cm Prim-Trode, Spain) were placed onto the anterior and posterior deltoid, supraspinatus fossa and V deltoid. Similarly, the intensity of the current was set 3 times per session and the stimulation was strong but comfortable (without exceeding the threshold of pain)."