Inclusion Criteria:  -Patient able and willing to comply with the requirements of the including hospitalization for up to 15 days. Patient whose wound to be studied is located in a location compatible with the use of VistaCare®, namely the leg including the knee but excluding the upper thigh Agreement of the study no-objection form Age greater than or equal to 18 years Patient affiliated to a social security scheme  Exclusion Criteria:  -Patient with general signs of infection at the time of inclusion (fever, lymphangitis, pus ...). Patient with active smoking Subject under guardianship or deprived of liberty Failure to obtain patient consent