Percutaneous US Guided Elbow Tenotomy With the TenJet HydroSurgery System

Inclusion Criteria: * Patient is \> 18 years of age * Chronic lateral or medial elbow pain \> 3 month duration * History and clinical examination consistent with lateral or medial epicondylitis * Sonographic evidence of medial or lateral elbow tendinosis as evidenced by * tendon thickening and hypoechogenicity, * with or without hypervascularity on Doppler examination and, * with or without cortical irregularities, Or MRI findings consistent with lateral or medial tendinosis, with or without intrasubstance tear. * \> 3 months of non-operative treatment that included * nonsteroidal anti-inflammatory drugs * activity modification * physical therapy * elbow straps * With or without previous steroid injections, protein rich plasma injections, or stem cell injections * Patient is willing and able to provide informed consent and comply with the study protocol Exclusion Criteria: * Documented ipsilateral upper extremity musculoskeletal condition (other than elbow tendinosis in the same arm on the opposite side) * Bleeding disorders and/or current use of anti-coagulants with the inability to withhold anticoagulants for required time prior to procedure * Use of acetylsalicylic acid (ASA) and/or non-steroidal anti-inflammatory drug (NSAID) within 7 days of treatment * Steroid injection within 4 weeks of the study procedure * Active local or systemic infection * Patient found to have further degenerative changes of the elbow contributing to pain, such as cartilage t…