咳铁锈色痰是大叶性肺炎的一个典型症状,但为什么目前临床上所遇到的大叶性肺炎患者,多无咳铁锈色痰的表现?为了弄清这个问题,首先温习一下大叶性肺炎的病理生理。大叶性肺炎的病理改变分为四期:1.充血期;2.红色肝样变期;3.灰色肝样变期;4.消散期。由于第二、三期肺呈实变改变,故又可称实变期。在实变早期(约为发病后2～3天),肺泡周围毛细血管扩张充血,肺泡内充满分泌物,除浆液外,还有网状纤维素、大量 Cough rust phlegm is a typical symptom of lobar pneumonia, but why the current clinical encounter in patients with lobar pneumonia, no more cough rust phlegm performance? To understand this problem, first of all to review the big leaf Pathophysiology of pneumonia. Pathological changes in lobar pneumonia is divided into four phases: 1. Congestion; 2. Red liver-like phase; 3. Gray liver-like phase; 4. Disappear. As the second and third lungs showed real changes, it can be said to change. Early consolidation in the early (about 2 to 3 days after onset), alveolar capillaries dilated congestion, alveoli filled with secretions, in addition to the slurry, there are reticular cellulose, a large number