VSD negative pressure drainage precautions mainly include the following aspects: first, VSD negative pressure drainage is through the negative pressure drainage device, the necrotic tissue or purulent tissue in the wound out of the body to promote wound healing, pay attention to whether the wound drainage is smooth, regularly check whether there is a blockage of the drainage tube, the blockage occurs, you need to keep the drainage tube smooth through flushing, etc., to avoid blockage affect the effectiveness of treatment The second aspect is to pay attention to whether the pressure setting of VSD negative pressure drainage is correct, as high pressure settings can lead to tissue necrosis, while low pressure can cause poor drainage and affect the effect of negative pressure drainage; thirdly, it is necessary to pay attention to whether there is infection around the patient’s negative pressure drainage wound, and change the medication every three days or so to keep the area around the drainage wound clean.