All are immediate causes of death in a case of burn, except –
First, the core concept here is the immediate causes of death in burn injuries. Burn patients can die from various complications, especially in the early stages. The immediate causes typically involve shock, airway compromise, and other acute issues.
Immediate causes of death in burns include hypovolemic shock due to fluid loss, airway obstruction from inhalation injury, and acute respiratory distress. Other possibilities might be cardiac arrest from electrical injuries or arrhythmias.
Now, the correct answer is D. Let's assume the options are something like:
A. Hypovolemic shock
B. Airway obstruction
C. Cardiac arrest
D. Sepsis
In that case, sepsis is a later complication, not immediate. The immediate causes are the first few hours after the burn. Sepsis develops days later due to infection from damaged skin. So D would be the exception here.
For the explanation, the core concept is about acute complications versus delayed ones. The correct answer is right because sepsis isn't immediate. The other options are all immediate: shock from fluid loss, airway issues, and cardiac problems. The clinical pearl would be to remember that sepsis is a delayed complication, not an immediate cause of death.
**Core Concept**
Immediate causes of death in burn injuries include hypovolemic shock, airway obstruction, and acute cardiac events. These occur within the first 24–48 hours due to fluid loss, inhalation injury, or electrical trauma. Sepsis and systemic inflammatory response syndrome (SIRS) are delayed complications occurring days later.
**Why the Correct Answer is Right**
**Option D (Sepsis)** is the exception because sepsis develops *after* the initial injury due to bacterial invasion of damaged skin and impaired immunity. It typically occurs 3–5 days post-burn and is not an immediate cause of death. Immediate deaths are due to acute fluid shifts, airway edema, or cardiac arrhythmias.
**Why Each Wrong Option is Incorrect**
**Option A (Hypovolemic shock):** Correct as an immediate cause. Burns cause massive fluid loss via capillary leakage, leading to hypovolemia within hours.
**Option B (Airway obstruction):** Correct as an immediate cause. Inhalation injuries cause rapid airway edema and carbonaceous secretions, risking asphyxiation.
**Option C (Cardiac arrest):** Correct as an immediate cause. Electrical burns or severe hypovolemia can trigger arrhythmias or cardiac arrest.
**Clinical Pearl / High-Yield Fact**
Remember the "Rule of 3s" for burn mortality: 3% mortality at 30% total body surface area burned in 3 days. Sepsis is a *delayed* complication, while shock and airway issues are *immediate*.
**Correct Answer: D. Sepsis**