Which burn pattern most strongly predisposes to hypovolemia due to fluid loss?

Which burn pattern most strongly predisposes to hypovolemia due to fluid loss?

• A. Isolated superficial burn
• B. Circumferential burn pattern
• C. Small partial-thickness burn
• D. Face burn only

Answer: (B)

Placing a burn on tissue causes plasma to leak into the interstitial space—a third-spacing effect that worsens with deeper injury and larger surface area. When a burn forms a circumferential pattern, it typically involves a large surface area wrapped around a limb or the chest, and the resulting tight eschar can act like a tourniquet. This combination both amplifies fluid loss from the wound itself and impedes venous return and tissue perfusion as swelling increases under the constricting eschar. The net effect is a faster and more pronounced drop in circulating volume, i.e., hypovolemia, compared with isolated superficial burns, small partial-thickness burns, or burns limited to the face.

Placing a burn on tissue causes plasma to leak into the interstitial space—a third-spacing effect that worsens with deeper injury and larger surface area. When a burn forms a circumferential pattern, it typically involves a large surface area wrapped around a limb or the chest, and the resulting tight eschar can act like a tourniquet. This combination both amplifies fluid loss from the wound itself and impedes venous return and tissue perfusion as swelling increases under the constricting eschar. The net effect is a faster and more pronounced drop in circulating volume, i.e., hypovolemia, compared with isolated superficial burns, small partial-thickness burns, or burns limited to the face.