Most common cause of death in burns is
**Core Concept**
The most common cause of death in burns is related to the systemic response to severe injury, leading to multi-organ failure. This is due to the release of various inflammatory mediators and the activation of the hypothalamic-pituitary-adrenal axis.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of burns, specifically the systemic inflammatory response syndrome (SIRS) that occurs after severe burns. This response is characterized by the release of cytokines, such as tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 beta (IL-1β), which can lead to multi-organ failure. The hypothalamic-pituitary-adrenal axis is also activated, leading to the release of stress hormones such as cortisol and adrenaline.
**Why Each Wrong Option is Incorrect**
**Option A:** Infection is a common complication of burns, but it is not the most common cause of death.
**Option B:** Hypovolemic shock can occur after severe burns, but it is not the primary cause of death.
**Option C:** Cardiac arrest can occur after severe burns, but it is not the most common cause of death.
**Clinical Pearl / High-Yield Fact**
It is essential to note that the mortality rate from burns is highest in the first 48 hours after injury, making early recognition and management of SIRS and multi-organ failure critical in reducing mortality.
**Correct Answer: B. Hypovolemic shock.**