Question 16

The Correct Answer is C **Why option C ("Massive loss of fluid through the burned area") is correct:** Shock in burn victims is primarily *hypovolemic shock*. Hypovolemic shock results from a severe decrease in the volume of circulating blood or plasma, making the heart unable to pump enough blood to the body. Following a major burn injury (especially second- and third-degree burns involving large surface areas), the damage to the capillary walls causes them to become extremely permeable. This leads to a rapid, massive shift of plasma, proteins, and electrolytes from the bloodstream into the interstitial space (the burned tissue area and surrounding unburned tissues). This fluid loss reduces the effective circulating blood volume dramatically, leading directly to systemic hypoperfusion (inadequate blood flow to organs) and, consequently, shock. **Why the other options are incorrect:** * **A) Increase in body temperature and pulse rate:** While an increased pulse rate (tachycardia) is a *sign* of the body compensating for low fluid volume (a sign of impending or existing shock), and an increased body temperature (hyperthermia or fever) can occur, neither of these is the *cause* of the underlying hypovolemic shock. They are physiological responses or consequences. * **B) Emotional stress:** Emotional stress contributes to the patient's anxiety and catecholamine release, which can transiently affect vital signs, but it does not cause the massive systemic fluid volume depletion necessary to induce severe hypovolemic shock characteristic of major burns. * **D) High level of pain:** Pain is a significant component of burn injury and requires immediate management, but like emotional stress, it does not cause the catastrophic fluid shift and subsequent reduction in circulating blood volume that defines the major cause of shock in these patients.