In general, the evolution of dressings has evolved from the earliest passive dressings to interactive dressings, and then to today's bioactive dressings.
The types of wound dressings are briefly explained as follows:
1. Passive dressing (traditional dressing), passively covers wounds and absorbs exudates, providing limited protection for wounds.
2. Interaction dressing. There are various forms of interaction between the dressing and the wound, such as absorption of exudate and toxic substances, allowing gas exchange, medical supplies wound dressing supplier to create an ideal environment for healing; barrier properties The outer layer structure prevents invasion of microorganisms in the environment and prevents cross-infection of wounds.
3. Biologically active dressings (closed dressings)
Medical supplies wound dressing exporter is also called airtight dressing because it can prevent wounds from drying out. The dressing is a combination dressing made of high-molecular materials and high-tech materials, which is a hot spot in the research and development of wound dressings. The biosynthetic dressing has a double-layer structure, and the outer layer is applied with a polymer material to provide a barrier function equivalent to the epidermis. The main materials selected for the inner layer are collagen, chitosan wound dressing  and calcium alginate, which have biological properties. Compatibility, good water absorption, breathability, adhesion and antibacterial, hemostatic effect. It can not only absorb wound exudate and ensure adequate drainage, but also retain part of the exudate in the dressing, and maintain a local moist environment that mimics the physiological healing of the wound, which is beneficial to the regeneration of wound granulation tissue and epithelial cells and accelerate wound healing. In synthetic dressings, some substances that are beneficial to wound healing, such as drugs, cytokines, and growth factors, can be added to form various dressings such as drug dressings, cytokine dressings, and growth factor dressings.www.china-medicaldressing.com