A nurse is attending to a patient in the intensive care unit. For each patient finding below, indicate whether the finding is consistent with fluid overload or dehydration in burn patients.

A. Consistent with dehydration: In burn patients, an increased heart rate or tachycardia is a compensatory mechanism for hypovolemia. As fluid shifts from the intravascular space to the interstitial space due to increased capillary permeability, the circulating blood volume decreases. The heart compensates by increasing its rate to maintain cardiac output and tissue perfusion. This systemic response is a hallmark sign of the fluid volume deficit that occurs during the emergent phase of burn injuries. B. Consistent with dehydration: Decreased urine output, or oliguria, occurs when the kidneys receive inadequate perfusion due to low intravascular volume and decreased cardiac output. In the context of a burn injury, extensive fluid loss through damaged skin and third-spacing leads to a drop in glomerular filtration rate. Monitoring urine output is a critical metric for assessing the adequacy of fluid resuscitation, with the goal being to reverse this sign of severe systemic dehydration. C. Consistent with dehydration: An elevated blood urea nitrogen level reflects hemoconcentration and reduced renal blood flow. The normal range for blood urea nitrogen is 7 to 20 mg/dL. In a dehydrated burn patient, the lack of sufficient fluid causes the concentration of urea in the blood to rise as the kidneys struggle to excrete metabolic waste. This elevation indicates that the patient requires aggressive fluid replacement to restore osmotic balance and ensure proper renal clearance of toxins. D. Consistent with fluid overload: A decreased hematocrit level often indicates hemodilution, which can occur during the state of fluid overload. While the hematocrit typically rises initially in burn patients due to plasma loss and hemoconcentration, a subsequent drop below the normal range of 42 to 52 percent for men or 37 to 47 percent for women may suggest excessive fluid administration. This occurs because the increased volume of administered fluids dilutes the existing red blood cell mass.