A client in the emergent/resuscitative phase of a burn injury has had blood work and arterial blood gases drawn. Upon analysis of the client's laboratory studies, the nurse will expect the results to indicate what findings?

During the emergent or resuscitative phase of a burn injury (the first 24–48 hours), several predictable metabolic and fluid shifts occur. Massive cellular destruction releases intracellular potassium into the bloodstream, causing hyperkalemia. Sodium shifts from the vascular space into the interstitium and burned tissue, producing hyponatremia. Fluid leaks out of the capillaries into the interstitial space (third spacing), causing hemoconcentration — the blood's cellular components become more concentrated relative to plasma volume, resulting in an elevated hematocrit. Therefore, the expected pattern is hyperkalemia, hyponatremia, and elevated hematocrit, which corresponds to the first option. Hypokalemia would occur later in the fluid remobilization (diuretic) phase when potassium re-enters cells. Hypernatremia is not expected because sodium is lost into burned tissue and edema fluid. A decreased hematocrit suggests hemodilution or hemorrhage, neither of which is the primary finding in the emergent burn phase. Understanding these pathophysiological fluid and electrolyte shifts is critical for anticipating laboratory results and guiding fluid resuscitation in burn care.