This composite of three anteroposterior (AP) chest x-rays illustrates the progression and resolution of Transfusion-Related Acute Lung Injury (TRALI). Image A represents a preoperative baseline showing clear lung fields, normal bronchovascular markings, and no medical devices. Image B demonstrates the acute phase of TRALI following blood transfusion, characterized by diffuse, bilateral pulmonary infiltrates and 'white-out' appearance consistent with non-cardiogenic pulmonary edema. Visible interventions in Image B include an endotracheal tube for mechanical ventilation, a right-sided central venous catheter, and ECG leads. Image C shows significant interval resolution of the bilateral infiltrates after several days of intensive care support. While the lungs have largely cleared, suggesting improved pulmonary compliance and gas exchange, the endotracheal tube has been removed (extubation), though central lines and monitoring electrodes remain. This sequence serves as a classic educational example of the rapid onset and potential for resolution of TRALI under appropriate ventilatory management.

This diagnostic image set consists of two side-by-side anteroposterior (AP) chest X-rays labeled 'a' and 'b,' demonstrating a case of Transfusion-Related Acute Lung Injury (TRALI). Image (a) represents the pre-transfusion baseline, showing relatively clear lung fields with normal lung volumes, distinct vascular markings, and a normal cardiac silhouette. Image (b) depicts the post-transfusion state, showing significant pathological changes. Key findings include diffuse, bilateral, and heterogeneous airspace opacities (patchy and confluent densities) throughout both lung fields, consistent with acute pulmonary edema. There is a visible reduction in lung volumes compared to the baseline. Multiple medical support lines and monitoring leads are now present across the thoracic cavity, indicating an escalation in clinical care. The mediastinal and cardiac contours remain within normal limits, helping to distinguish this non-cardiogenic pulmonary edema from heart failure. This comparison is an educational resource for identifying the radiological hallmarks of TRALI following blood product administration, emphasizing the rapid onset of bilateral pulmonary infiltrates.

A multi-panel line graph illustrating hemodynamic and respiratory changes in a sheep model of Transfusion-Related Acute Lung Injury (TRALI). The figure is divided into two columns: the left represents groups receiving saline as a first event (sham, saline-fresh, saline-stored), and the right represents groups receiving lipopolysaccharide (LPS) as a first event (LPS-control, LPS-fresh, LPS-stored). Six parameters are plotted over a 240-minute period: Mean Arterial Pressure (MAP), Pulmonary Artery Pressure (PAP), Cardiac Output (CO), Oxygen Saturation (O2 sat), arterial partial pressure of oxygen (PaO2), and static pulmonary compliance. Key events are marked: first event (0–30 min) and second event (90–150 min), involving infusions of saline, fresh packed red blood cells (PRBC), or stored PRBC. Horizontal dashed lines indicate clinical hypoxemia thresholds (O2 sat = 90%; PaO2 = 125 mmHg). Notably, the LPS-stored group shows significant pathological trends, including decreased MAP, CO, PaO2, and O2 sat, alongside increased PAP, compared to controls, characteristic of a two-hit model of acute lung injury.

This sequence of three anteroposterior (AP) chest X-rays (labeled A, B, and C) demonstrates the longitudinal progression and resolution of acute pulmonary edema, consistent with Transfusion-Related Acute Lung Injury (TRALI). All images show sternotomy wires and surgical clips, indicating a post-thoracic surgery status. Image A (immediate postoperative) shows relatively clear lung fields with a stable nodular mass in the right middle zone. Image B (onset of respiratory distress) reveals a dramatic bilateral increase in diffuse, confluent alveolar and interstitial opacities, characteristic of pulmonary edema, with a stable cardiomediastinal silhouette. Image C (recovery phase) demonstrates significant clearing of the bilateral infiltrates and improved aeration of the lung parenchyma following treatment. The trachea remains midline and there is no evidence of cardiomegaly throughout the sequence, supporting a non-cardiogenic etiology for the pulmonary findings. These images serve as an educational example of rapid-onset pulmonary edema and its radiographic evolution in a critical care setting.