3.1.5-Lung Toluidin Blue Staining
According to light microscope data obtained from control rat lung samples on half thin sections with toluidine blue staining, pulmonary alveoli with normal spread were observed. Alveolar epithelium had normal appearance and thin edges. These structures were divided by fine alveolar septa.
According to light microscope data from the PPI group, increased and abnormal distribution of collagen fibers were observed around blood capillaries. The increase in erythrocyte amounts was notable. Occasionally closed and narrowed alveoli were observed. Alveolar macrophage increase was observed in the alveolar lumen.
According to light microscope data obtained from the group administered H2 receptor blockers, alveoli and alveoli walls had abnormal and irregular structures. There was very excessive alveolar narrowing. Thickening of alveolar walls was observed (Figure 3).