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National Physical Therapy Examinations - Blogs Sample Questions

The area of a burn that received the most severe injury with irreversible cell damage is which of the following?

Correct Answer:
zone of coagulation


when evaluating burn injuries, it's crucial to understand the different zones of injury, as these indicate the severity and potential recovery outcomes. these zones are categorized into the zone of coagulation, the zone of stasis, and the zone of hyperemia. each of these zones reflects varying degrees of tissue damage and potential for recovery.

the zone of coagulation represents the area where the burn has inflicted the most severe damage. this zone is characterized by irreversible cell damage where the proteins within cells and cell membranes are denatured due to the intense heat. as a result, the tissues in this zone are coagulated, leading to necrosis, and this area often requires surgical intervention, such as debridement or grafting, to heal.

surrounding the zone of coagulation is the zone of stasis. this area experiences less severe injury compared to the zone of coagulation. the damage in the zone of stasis is potentially reversible, but it is also at risk of progressing to more severe damage if not properly managed. the blood flow in this area is reduced, which can lead to ischemia and tissue hypoxia. prompt and effective treatment, including rehydration and maintaining adequate circulation, can help tissues in this zone recover fully.

the outermost layer around the burn injury is the zone of hyperemia. this zone exhibits inflammation due to increased blood flow but generally does not involve permanent damage to the tissue. the cells in the zone of hyperemia are likely to recover without any medical intervention, as long as complications do not develop from other zones.

understanding these zones helps in assessing the severity of a burn and strategizing the medical response. the zone of coagulation, due to its irreversible damage, is the primary focus when considering immediate medical interventions in severe burn cases.