Ultrasound-Guided Percutaneous Electrolysis and Eccentric Exercises for Subacromial Pain Syndrome: A Randomized Clinical Trial

Figure 5

Needle approach during the application of US-guided percutaneous electrolysis. The figure shows the location of cathode (targeting the supraspinatus tendon) and anode (over the upper trapezius muscle) electrodes for application of percutaneous electrolysis. The transducer is placed on the supraspinatus tendon and the needle is inserted in the centre of the transducer in a long-axis position at an angle of about 30–45° to the skin surface, depending on the target area, and then advanced parallel to the sound beam.