Qualification Procedure

This study included patients who met all of the following criteria: (1) skin wounds with pressure, venous, or diabetic etiology; (2) wounds with a duration exceeding 3 months; (3) wounds classified as class II or III according to the Centers for Disease Control and Prevention (CDC); (4) the absence of health conditions contraindicating the application of ESWT; and (5) patient’s informed consent obtained prior to the study commencement. Patients were excluded if they met any of the following criteria: (1) clinical wound infection confirmed in microbiological tests; (2) wounds classified as class I or IV according to CDC; (3) patient non-compliance with the study protocol; and (4) patients with existing contraindications to ESWT were also excluded from participation in the study.