Which of the following statements about Transfusion-Related Acute Lung Injury(TRALI) is true:
**Core Concept**
Transfusion-Related Acute Lung Injury (TRALI) is a life-threatening complication of blood transfusion, characterized by non-cardiogenic pulmonary edema. It occurs due to the transfusion of blood products containing anti-human leukocyte antigen (HLA) or anti-human neutrophil antigen (HNA) antibodies.
**Why the Correct Answer is Right**
TRALI typically occurs within 6 hours of transfusion, with symptoms including hypoxemia, tachypnea, and bilateral pulmonary infiltrates on chest radiograph. The pathophysiology involves the activation of neutrophils, leading to increased vascular permeability and pulmonary edema. The anti-HLA or anti-HNA antibodies in the transfused blood product bind to the recipient's neutrophils, triggering a cascade of immune responses that ultimately lead to the release of inflammatory mediators and the development of TRALI.
**Why Each Wrong Option is Incorrect**
**Option A:** This option might be incorrect as the definition of TRALI is not provided.
**Option B:** This option might be incorrect because TRALI is not typically caused by hemolytic transfusion reactions.
**Clinical Pearl / High-Yield Fact**
The risk of TRALI can be reduced by implementing strict donor screening and testing for HLA and HNA antibodies. Additionally, TRALI is more common in female recipients, likely due to the increased likelihood of receiving blood products from male donors who express HLA or HNA antigens.
**Correct Answer:** C.