Trauma bed preparation is a concept introduced in recent years, which has revolutionized the management of chronic wounds and is now widely used in clinical practice. I have used the concept of trauma bed preparation in combination with dozens of cases of infected wounds of the thoracic and abdominal walls and have summarized a simple, effective and economical method – debridement + open flush drainage, which I hope will be helpful to you. Trauma bed preparation concept: that is, implement a series of processes based on a comprehensive assessment of the wound, including systemic and local assessment of the wound, focusing on the removal of bacterial, necrotic and cellular loads on the wound and the application of dressings, growth factors, enzymes, etc. to actively create a relatively suitable microenvironment of the wound to accelerate wound healing or prepare it for further surgical treatment. Wound infection is a common clinical phenomenon that is encountered in surgical departments such as thoracic surgery, general surgery, and obstetrics and gynecology. For infected wounds, the first assessment1 time, the earlier the better, the first time to find the wound infection and timely treatment, can significantly accelerate the wound healing. The later the treatment, the slower the recovery. Assess the entire spatial structure of the wound, which is the focus of the assessment. This includes the depth, course, and width of the wound. Commonly used methods sinus tractography, CT, MRI, etc. I introduce a simpler method. Use a large vascular forceps with an elbow (commonly known as the big bend) along the wound to probe forward, meet resistance to change the direction, to gently can not use violence, generally more can probe the bottom of the wound, using this method is best to be carried out by a certain work experience surgeon. After assessment, the second step of processing. 1, debridement, removal of necrotic tissue, the construction of a wound can be smooth drainage. This is a very important part. The debridement should be “moderate”. Neither too little necrotic tissue should be removed, which will not achieve the effect of clearing, but also too much tissue should not be removed, which will easily cause bleeding. Do not expect to remove all necrotic tissues at once. 2. Rinse and drain the trauma surface. Prepare a simple electric aspirator, connect the infusion skin strip with a bottle of saline, attach a 12-gauge catheter (or 10, 8, depending on the size of the wound diameter) to the end of the infusion skin strip, place the catheter into the bottom of the wound, open the infusion drip, and at the same time use the suction around the wound surface to attract, rinse for about three minutes, once every half hour. For infected wounds, debridement is generally evaluated once every three days, focusing on removing necrotic tissue and establishing drainage channels. Flushing and drainage is performed continuously, every half hour. This treatment fully applies the concept of trauma bed preparation, assessment – treatment – reassessment – re-treatment, with dynamic assessment and treatment. Both debridement and irrigation are mostly effective in removing the bacterial, necrotic, and cellular load from the wound, and they maintain the continuity of treatment, significantly accelerating the wound healing process, and the wound generally heals more often in one to three weeks.