Cell Therapy for Lower Limb Ulcers in Patients With Critical Limb Ischemia

Cellular Therapy Treatment: The treatment will consist of \*\*20 participants (n=20) who will receive treatment with expanded mesenchymal stem cells (MSCs). The patient will undergo a surgical debridement procedure for the ulcer to be in its optimal condition (Visit 1). Subsequently, the patient will receive MSC application via perilesional injections and a biocovering produced by the study team, also containing the same cells (single session - the MSC-containing dressing will remain in contact with the ulcer for 7 days). After removal of the biological dressing, the ulcer will receive local care with a topical hydrogel dressing, dry gauze, and a crepe bandage, with a minimum of one change per day.

The control group will consist of 20 participants (n=20) who will receive local care for the ulcer. The patient will undergo a surgical debridement procedure for the ulcer to be in its optimal condition (Visit 1). Subsequently, the patient will receive the application of a conventional dressing with Hydrogel, dry gauze, and a crepe bandage. The patient will be instructed to change the dressing at least once a day.