Traditional pathological studies reported that there are fourpathological stages of pneumonia:1. Congestion: Over the first 24 hours there is alveolar oedemaand vascular congestion.2. Red hepatisation: In days 2e4, exudate, containing red bloodcells, neutrophils and fibrin fill the airspaces making themmore solid.3. Grey hepatisation: In days 5e7, the red cells in the exudate arebeginning to break down.4. Resolution: From day 8 up to 3 weeks the exudate is brokendown by enzymes, digested by macrophages or coughed up assputum
正在翻譯中..
