Advantages of using negative pressure drainage to treat wounds

① The treatment time is obviously shortened, the pain of patients is reduced, and the workload is reduced. One closure drainage can maintain effective drainage for 7-10 days without changing the dressing every day, which not only reduces the pain and economic burden of patients, but also reduces the workload of medical staff.

② Effectively avoid cross infection. VSD is carried out in a closed system. Negative pressure drainage makes the exudate and necrotic tissue in the drainage area be removed in time, so that there is no accumulation in the drainage area. VSD can prevent wound contamination, fully drain and stimulate rapid and good growth of wound granulation tissue. Accelerate the healing of infected wounds and reduce the use of antibiotics.

③ High efficiency, omni-directional, zero accumulation, ensuring drainage effect and promoting wound blood circulation. The method of continuous negative pressure suction is adopted to change passive drainage into continuous active suction without leaving any cavity. The pressure basically meets the requirements of physiological conditions, so it does not affect blood circulation. More importantly, continuous negative pressure suction promotes the continuous flow of body fluid from the wound tissue to the drainage tube, providing an effective, continuous and auxiliary power for the blood supply of the wound.

④ Avoid the formation of dead space and shrink the wound. VSD makes the drainage cavity wall sink while drawing out the exudate. With the gradual withdrawal of the medical foam material, the cavity wall closely fits, effectively preventing the formation of residual abscess and dead cavity. For superficial wound, it can close to the tissue, shrink the wound and reduce the area of skin graft. Histological examination confirmed that the infiltration of lymphocytes in the wound surface with negative pressure sealing drainage subsided rapidly, collagen synthesis was earlier in the proliferative phase, and contractile fiber synthesis was enhanced in the repair phase [5]. The data in this group confirmed the actual clinical effect of the closed negative pressure suction technology, which is worth extensive application.