Efficacy of Therapeutic Percutaneous Electrolysis Simple vs Multifiliar Therapy in Supraspinatus Tendinopathy.

Supraspinatus tendinopathy (SE) is one of the main pathologies that cause functional alterations in the glenohumeral joint. It reduces the quality of life of the population suffering from this injury. This pathology is the most frequent cause of pain in this joint. Symptoms are aggravated by repetitive work performed at or above shoulder height and sports that involve movements above the head. Single-blind randomised clinical trial. The participants in this study will be patients selected from the ValleSur physiotherapy clinic in Ávila from January to May 2026. These patients will be diagnosed beforehand by an orthopaedic surgeon through a complete series of orthopaedic and complementary diagnostic tests. Following the clinical examination conducted by the principal investigator to verify the presence of tendinopathy in the supraspinatus and identify the selection criteria in the selected participants. Ultrasound imaging will be used to select the area to be treated. A single-blind clinical trial with a randomised design will be conducted, in which the evaluator will be blinded to assess the short- and medium-term efficacy of treatment with ultrasound-guided electrolysis. The results will then be compared with another intervention already performed with laser therapy for the same pathology and at the same centre. - Common part of the treatment: Participants included in the study receive one intervention, with four evaluations: pre-intervention, post-intervention, 24 hours and one week after the intervention. \- Invasive procedure: The patient is placed in a prone position with their feet outside the treatment table. Before beginning the intervention, the physiotherapist uses sterile gloves and examines the area to be treated using a linear probe ultrasound scanner, 2D study, in B mode and Doppler, to identify the target tissue safely and guaranteein B-mode and Doppler mode, to identify the target tissue safely and ensure the effectiveness of the technique. (10) On