The goal of this clinical trial is to evaluate the effectiveness of cold atmospheric plasma treatment in promoting the healing of chronic wounds in adult participants suffering from chronic wounds. The main questions is the following: Does the application of cold atmospheric plasma accelerate wound healing compared to standard wound care alone?

Researchers will compare standard of care plus plasma treatment with standard of care alone to see if the plasma-treated group shows faster wound healing.

Participants will:

• Receive either standard wound care alone or standard wound care combined with cold atmospheric plasma treatment, depending on randomization.
• Attend scheduled hospital visits for wound care, treatment administration, and clinical assessments, including wound photography and quality of life questionnaires.
• Be followed up at home by nurses for wound care, treatment administration and clinical assessment too.
• Complete a wound-related quality of life questionnaire at baseline, at week 6, and at the end of the study.

This is a multicenter, randomized, controlled clinical trial evaluating the efficacy and safety of cold atmospheric plasma (CAP) therapy using the Plasana One® device in the treatment of chronic wounds. The study aims to compare the outcomes of standard of care alone versus standard of care combined with plasma treatment.

60 eligible participants presenting with chronic wounds (such as venous leg ulcers or diabetic foot ulcers) will be randomized into two groups:

• One group will receive standard wound care as per clinical practice.

• The other group will receive standard wound care along with cold plasma therapy administered using the Plasana One® device.

  6 participants suffering from pressure ulcers will also be included for an ancillary study.

The study includes both hospital-based and home-based components. Key study procedures include wound assessment through photography, clinical data collection using an electronic case report form (eCRF), and evaluation of patient-reported outcomes such as quality of life (Wound-QoL questionnaire).

Treatments and follow-up visits will be conducted by hospital investigators and home healthcare professionals, depending on the participant's care pathway. Plasma treatment will be delivered by trained nurses during home visits, with gas supplies and device management coordinated by a home care service provider (PSAD).

The primary objective is to evaluate the efficacy of the cold plasma device Plasana One® in the local management of chronic wounds in participants suffering from diabetic foot ulcers and venous leg ulcers, at Week 6.

Secondary objectives include wound healing progression, quality of life, safety of plasma application, and user satisfaction over a 20-week period.

The objective of the ancillary study will be to describe the healing process in pressure ulcers.

Inclusion Criteria:

• Adult patient, age ≥ 18 years,

• Patients affiliated with a social security system or benefiting from such a system,

• Patients able and willing to provide written informed consent,

• Patients able and willing to attend regular follow-up visits during up to 20 weeks, and comply with study procedures,

• Patients whose home healthcare professional is willing to follow the clinical investigation protocol,

• Patient with gas conformed stockage area (ventilated or at least 7m²)

• Patients without infection, or with a local controlled infection,

• Patients with VLU:

  • Patients with wound anteriority between 1 to 12 months
  • Patients with VLU or mixed ulcer of predominantly venous origin (measured ankle brachial index (ABI) such as 1.3 ≥ ABI ≥ 0.8)
  • Patients with VLU between 4 to 30 cm² in surface area,
  • Patients with only one VLU,
  • Patients who have not shown wound healing improvement after wearing compression system for at least two weeks

• Patients with DFU:

  • Patients with wound duration between 1 to 12 months
  • Patients with DFU and with measured ABI ≥ 0.8 or Toe Brachial Index (TBI) ≥ 0.7
  • Patients with DFU between 1 to 30 cm² in surface area,
  • Patients with only one DFU, not between toes,
  • Patients who have not shown wound healing improvement after wearing an offloading system for at least two weeks,

• Patient with PU:

  • Patient with wound duration between 1 to 12 months
  • Patient with PU stage 2 or 3 NPUAP grade,
  • Patient with PU and with ABPI ≥ 0.8 and ≤ 1.3 and/or Toe Brachial Index (TBI) ≥ 0.7 if PU on the foot
  • Patient with PU between 4 to 30 cm² in surface area,
  • Patient with only one PU
  • Patient able and willing to wear off loading system or to be install on pressure relieving system et changing position regularly,

Exclusion Criteria:

• Patients with any other wound treatments other than SOC, Patients who has undergone surgery or surgical revascularization (vascular reconstruction or angioplasty) since less than three months, except for VLU patients who have undergone local graft surgery included in VLU SOC.
• Patients with an active Charcot's neuro-arthropathy as determined by clinical and/or radiographic examination,
• Patients with critical limb ischemia or severe PAD (ankle pressure < 50 mmHg or Toe pressure < 30 mmHg).
• Patients with conditions that may affect wound healing, such as rheumatoid arthritis, scleroderma, or tumor wounds.
• Patients with progressive neoplastic lesions treated by radiotherapy, chemotherapy, hormone therapy or immunosuppressant,
• Patients with non-controlled systemic infection by a suitable antibiotic,
• Patients with suspicion of severe malnutrition,
• Pregnancy or breastfeeding woman, or susceptible to be pregnant,
• Patients with known allergy or hypersensitivity to components of the cold plasma device or standard wound care products,
• Patients included in another study,
• Patients under guardianship or protection of vulnerable adult.
• Patients with implantable electro-medical devices.
• Patients with a history of hypersensitivity or known allergy to medical argon or any component of the device.
• Infected wounds requiring urgent medical or surgical treatment before the application of any device.