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?

A. Lactated Ringer's at 150 mL/hr: Large-volume fluid administration increases preload, which can worsen pulmonary congestion and stress an already failing heart. In cardiogenic shock, the problem is pump failure rather than fluid deficit, making aggressive fluid infusion harmful. This intervention increases myocardial workload instead of reducing it.

B. Morphine sulfate 4 mg IV: Morphine decreases preload and afterload through venous dilation, which reduces the heart’s workload and oxygen demand. It also decreases anxiety and sympathetic stimulation, helping limit further cardiac strain. These effects support myocardial rest and improved efficiency.

C. Norepinephrine 2 mg/min: Norepinephrine causes potent vasoconstriction that raises afterload, forcing the failing heart to pump against greater resistance. This can worsen cardiac workload and oxygen consumption in cardiogenic shock. It is usually avoided unless severe hypotension is present and unresponsive to other treatments.

D. Dobutamine 3 mcg/kg/min: Dobutamine improves contractility and cardiac output, but it also increases myocardial oxygen demand. While helpful for improving perfusion, it does not primarily reduce workload. Its inotropic effect can stress the heart further if not titrated carefully. It is supportive but not the priority intervention for conserving energy.

A. hypokalemia, hypernatremia, and hypoalbuminemia: Hypokalemia and hypernatremia are not expected early findings after a major burn. Potassium initially rises due to massive cell destruction, and sodium commonly falls because of fluid shifts into the interstitial space, making this pattern inconsistent with the emergent phase.

B. hyperkalemia, hypernatremia, and hyperalbuminemia: Although hyperkalemia is expected, hypernatremia is unlikely because sodium shifts into the tissues with extensive edema. Albumin levels usually fall due to increased capillary permeability and plasma protein loss, so hyperalbuminemia would not be seen.

C. hyperkalemia, hyponatremia, and metabolic alkalosis: The potassium and sodium patterns fit early burn physiology, but metabolic alkalosis does not. Massive fluid loss, hypoperfusion, and lactic acid accumulation commonly produce metabolic acidosis rather than alkalosis during the emergent period.

D. hyperkalemia, hyponatremia, and metabolic acidosis: This combination reflects typical early burn responses. Potassium rises from cellular lysis, sodium falls due to third spacing, and acidosis develops from tissue hypoxia and anaerobic metabolism.