Clinical Trial to Evaluate the Efficacy, Tolerance and Acceptability of URGO Dressing vs a Hydrofibre in the Local Management of Venous or Predominantly Venous Mixed Leg Ulcers.

Inclusion Criteria: * Patient over 18 years old who has provided his/her written informed consent * Patient who can be monitored by the same investigation team throughout the duration of the study * Patient who agrees to wear effective venous compression every day, associated with the trial dressing * Leg ulcer with a distal Ankle Brachial Pressure Index (ABPI) not less than 0.7 and not more than 1.3 * Ulcer with a minimum area of 3 cm2 and a maximum area of 30 cm2 * Ulcer duration between 3 and 36 months * Ulcer where the surface area is 70% or more covered by fibrinous tissue * Ulcer at least 3 cm away from any other lesion * Ulcer moderately or strongly exudative justifying the use of an absorbent dressing Exclusion Criteria: * Female patient of child-bearing potential who has no effective means of contraception * Patient who is pregnant or breastfeeding * Patient taking part in another therapeutic trial * Patient with hypersensitivity to one of the components of the trial dressing or a known allergy to carboxymethylcellulose (hydrocolloid) * Patient with a serious general pathological condition who, it may be feared, might discontinue participation in the trial before the six weeks of treatment * Patient with an evolving neoplastic condition, treated by radiotherapy, chemotherapy or hormone therapy * Patient with a systemic infection not controlled by suitable antibiotic treatment * Patient who, during the 3 months before inclusion, presented a deep vein thrombosis * Ulcer where its surface is totally or partially covered by black necrotic plaque * Ulcer which is clinically infected * Ulcer requiring surgical treatment or for which surgery is programmed during the six weeks following inclusion * Malignant ulcer