Effect of PEM Treatment of Superficial Axial and Tributary Vein Reflux on Improvement of Wound Healing in VLUs

Inclusion Criteria: * Age ≥ 18 years old * Active VLU with a CEAP classification of C6 * Non-healing VLU ≥ 1 month but not greater than 24 months * In the case of more than one ulcer, the largest ulcer (compliant with study criteria) will be chosen as the study ulcer and treated in the study. Other ulcerations, if present on the same leg must be at least 2cm apart from the study ulcer. * Demonstrable GSV insufficiency (as per the Society for Vascular Surgery \[SVS\] and the American Venous Forum \[AVF\] Guidelines) via venous insufficiency study (VIS) (11) * VLU considered non-healing (clinically defined as ≤70% wound improvement) after a 4-5 week run-in period with compression therapy * Venous leg ulcer size ≥ 2cm2 within the great saphenous distribution and must be visualized in one plane to allow for image collection of the entire wound in one photo by the Silhouette device. * The ulcer must extend through both the epidermis and dermis, with no exposed tendon or bone * The ulcer must be located below the knee * The ulcer bed must have some viable tissues with some granulation tissue * Able to tolerate effective compression bandaging * Patients able to walk independently with or without mobility aids * Ability to comprehend and sign an informed consent document and complete study questionnaires in English * Able and willing to attend all follow up visits Exclusion Criteria: * Age \< 18 years old * Small saphenous vein (SSV) distribution VLUs * Patients who had previously received interventions for underlying venous disease or prior VLU treatments that would not be considered to be conservative, in the opinion of the principal investigator * Exposed bone, tendon, or fascia * Deep vein reflux unless clinically insignificant in comparison to superficial reflux * Patients with leg ulceration etiology other than venous insufficiency * Severe rheumatoid arthritis * History of radiotherapy to the ulcer site * Uncontrolled congestive heart failure (left or right sided heart failure) * Receiving corticosteroids or immune suppressive therapy * Active clinical infection of the ulcer site, however, patients may be entered into the study after successful treatment of infection * History of collagen vascular disease * History of known malnutrition (albumin \<3.0 g/dL) * History of known uncontrolled diabetes \[hemoglobin A1c (HgbA1c) \>8.0%\] * History of known arterial insufficiency \[ankle-brachial index (ABI) \<0.7, transcutaneous oxygen (tcpO2) \<35 mmHg, or toe-brachial index (TBI) \<0.4\] * Signs of cellulitis, osteomyelitis, or necrotic or avascular ulcer bed(s) * Active sickle cell disease * Patients diagnosed with DVT or phlebitis in the affected limb in the last 6 months, or with acute pulmonary embolism (PE) in the last 6 months (contraindication to PEM) * Known allergic response to polidocanol or heparin, including history of heparin-induced thrombocytopenia, and/or multiple allergic reactions (contraindication to PEM) * Chronic renal disease, if deemed by the principal investigator to be severe enough to interfere with wound healing * Known active or recurrent cancer, or currently receiving chemotherapy or radiation therapy * Poorly controlled asthma * Pulmonary edema * Major surgery, prolonged hospitalization, or pregnancy within 3 months of screening * Minor surgery within 1 month of screening * Current alcohol or drug (illicit or prescription) abuse * Pregnant or lactating women * History of stroke * Unable to comply with the procedures described in the protocol * Unable to comply with compression therapy recommendations * Unable to give informed consent * Non-English speaking * Enrolled in a clinical evaluation for another investigational wound-care device or drug