VSD(国外英文资料).docVIP

VSD The VSD definition Refers to the polyvinyl alcohol use contains drainage tube hydration foam dressings, algae salt to override or fill the skin and soft tissue defect wound, reoccupy biological membrane to closed, makes it a confined space, finally the drainage tube through negative pressure source, through to control the negative pressure to promote wound healing of a new treatment. Its features are: 1) controllable negative pressure, promoting blood flow growth and protein synthesis, promoting the growth of granulation, and accelerating the healing of the wound. At the same time, it provides the driving force for all-directional active drainage. 2) the sealing of biosemi-permeable membrane, which insulates the opportunity of infection in contact with outer environment. 3) comprehensive drainage, is the traditional point or local drainage, into planar drainage, ensure the can at any time will be wound each place of necrotic tissue and exudate, excreted out in a timely manner. VSD indications: 1 heavy soft tissue bruise and soft tissue defect; 2 large hematomas or effusions; Three bone compartment syndrome; An open fracture may or may be associated with an infected person; The mechanism of closed drainage is: The sealing of the high negative pressure which is the driving force is maintained, and the drainage area is isolated from the outside, effectively preventing contamination and cross-infection. 2 high negative pressure seal can continue drainage, necrotic tissue and wound exudates bacteria, etc., make the drainage area to achieve zero, the wound will soon get a clean environment; Increase the blood supply of the wound, improve the microcirculation and promote the growth of granulation tissue. The VSD can significantly increase the proliferation and microvascular densities of endothelial cells, fibroblasts, and fibroblasts in the dermal epithelial cells of the rhib. In recent years, some studies have found significant increases in the negative pressure befor