Biologically active dressing (closed dressing)

This type of dressing is also called airtight dressing because it can prevent the wound from drying out. The dressing is a combined dressing made of polymer materials and biological materials through high-tech methods. It is a hot spot in the development and research of wound dressings. The biosynthetic dressing has a double-layer structure, and the outer layer uses polymer materials to provide a barrier function equivalent to the epidermis; the main materials selected for the inner layer are collagen, chitosan wound dressing[1] and calcium alginate, which are biological Compatibility, good water absorption, air permeability, adhesion and antibacterial and hemostatic effects. It can not only absorb the wound exudate and ensure sufficient drainage, but also retain part of the exudate in the substitute dressing, maintain a local moist environment that imitates the physiological healing of the wound, is beneficial to the regeneration of wound granulation tissue and epithelial cells, and accelerates wound healing. In the synthetic dressing, some substances that are beneficial to wound healing, such as drugs, cytokines, growth factors, etc., can be added to form various dressings such as drug dressings, cytokine dressings, growth factor dressings, etc.