After 16 consecutive days of intrathoracic lavage (2000 ml of normal saline per day), sensitive antibiotic anti-infection, and nutritional support treatment, his symptoms significantly improved.When the patient met the following conditions postoperatively: 1 Hemoglobin reached 100 g/L and plasma albumin reached 30 g/L;2The colour of drainage fluid became clear, and the drainage volume was less than 100 ml per day; 3 Re-pathogen culture negative; 4 The infection was initially controlled and the wound granulation was expected to be fresh. The gene discussed is ALB; the disease is infection.