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A pulmonary contusion, also known as lung contusion, is a bruise of the lung, caused by chest trauma. As a result of damage to capillaries , blood and other fluids accumulate in the lung tissue. The excess fluid interferes with gas exchange , potentially leading to inadequate oxygen levels ( hypoxia ).
VALI is most common in people receiving mechanical ventilation for acute lung injury or acute respiratory distress syndrome (ALI/ARDS). [1] 24 percent of people mechanically ventilated will develop VALI for reasons other than ALI or ARDS. [1] The incidence is probably higher among people who already have ALI/ARDS, but estimates vary widely. [1]
Other triggers include mechanical ventilation, sepsis, pneumonia, Gilchrist's disease, drowning, circulatory shock, aspiration, trauma—especially pulmonary contusion—major surgery, massive blood transfusions, [46] smoke inhalation, drug reaction or overdose, fat emboli and reperfusion pulmonary edema after lung transplantation or pulmonary ...
The pathophysiology of acute respiratory distress syndrome involves fluid accumulation in the lungs not explained by heart failure (noncardiogenic pulmonary edema). It is typically provoked by an acute injury to the lungs that results in flooding of the lungs' microscopic air sacs responsible for the exchange of gases such as oxygen and carbon dioxide with capillaries in the lungs. [1]
A chest injury, also known as chest trauma, is any form of physical injury to the chest including the ribs, heart and lungs. Chest injuries account for 25% of all deaths from traumatic injury. [ 1 ] Typically chest injuries are caused by blunt mechanisms such as direct, indirect, compression, contusion, deceleration, or blasts [ 2 ] caused by ...
Although ARDS can present with pulmonary edema (fluid accumulation), it is a distinct clinical syndrome that is not synonymous with pulmonary edema. Direct lung injury Acute lung injury may cause pulmonary edema directly through injury to the vasculature and parenchyma of the lung, causes include:
Double pneumonia is a historical term for acute lung injury (ALI) or acute respiratory distress syndrome (ARDS). [15] However, the term was, and, especially by lay people, still is used to denote pneumonia affecting both lungs. Accordingly, the term double pneumonia is more likely to be used to describe bilateral pneumonia than it is ALI or ARDS.
A pulmonary contusion is another cause of bleeding within the lung tissue, but these result from microhemorrhages, multiple small bleeds, and the bleeding is not a discrete mass but rather occurs within the lung tissue. An indication of more severe damage to the lung than pulmonary contusion, a hematoma also takes longer to clear. [3]