Which one of the following is the cause of non – cardiogenic pulmonary oedema seen in immunologic blood transfusion reaction –
**Core Concept**
The underlying principle being tested is the pathophysiology of non-cardiogenic pulmonary edema in the context of an immunologic blood transfusion reaction, which involves an immune-mediated response. This reaction can lead to increased permeability of pulmonary capillaries.
**Why the Correct Answer is Right**
Although the answer choices are not provided, typically, the correct answer would involve a mechanism related to the immune response, such as the release of cytokines and other inflammatory mediators that increase vascular permeability. This can occur through the activation of various pathways and the involvement of specific receptors and immune cells.
**Why Each Wrong Option is Incorrect**
**Option A:** Would be incorrect if it suggested a cardiogenic cause.
**Option B:** Might be wrong if it implicated a non-immunologic mechanism.
**Option C:** Could be incorrect if it pointed towards a different type of transfusion reaction.
**Option D:** Would be incorrect if it did not involve an immunologic response.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that transfusion-related acute lung injury (TRALI) is a leading cause of non-cardiogenic pulmonary edema in the setting of blood transfusion, often due to an immunologic reaction.
**Correct Answer:** Correct Answer: D. Transfusion-Related Acute Lung Injury (TRALI)