Figure 4From: Administration of intrapulmonary sodium polyacrylate to induce lung injury for the development of a porcine model of early acute respiratory distress syndromeTransmission electron microscopy of lung tissue from pig subjected to experimental injury with intratracheal SPA. (A) Interstitium and adventitia of a terminal bronchus with migrating polymorphonuclear leukocyte (solid white arrow), macrophage (dashed white arrow), and monocyte/macrophage (solid black arrow). Edematous exudate (asterisk) is noted (original magnification × 3,900). (B) Alveoli with type 2 pneumocytes (black arrows) and dense fibrin deposition (white asterisk) (original magnification × 3,900).Back to article page