The variety of strategies in the treatment of parapneumonic pleural empyema demonstrates the ambiguity for the method of choice. Parapneumonic pleural empyema has been classified into different stages and classes. While the American Thoracic Society (ATS) classification is based on the natural course of the disease, or according to the radiological, physical and biochemical characteristics respectively, the American College of Chest Physicians (ACCP) has categorized the patients with pleural empyema according to the risk of a poor outcome. The British Thoracic Society (BTS) developed a treatment algorithm based on a systematic review of peer-reviewed literature. With regard to this classification the management of parapneumonic and postoperative pleural empyema is based on the stage of the disease. Therapeutic strategies include chest tube alone, chest tube with fibrinolysis, thoracoscopic debridement and decortication in open or minimally invasive techniques, closed empyemectomy, or treatment with thoracomyoplasty, open window treatment or vacuum clothing with negative pressure. The different conservative and operative therapeutic possibilities determinate the central treatment function of thoracic surgery.

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