A nurse in the emergency department is caring for a client who collapsed after playing football on a hot day. After reviewing the admission laboratory findings, the nurse recognizes that these findings are consistent with which of the following conditions?

Choice A reason: The normal range for serum creatinine in adult females is approximately 0.6–1.1 mg/dL. A level of 1.8 mg/dL is elevated and indicates impaired kidney function, which is a risk factor for AKI.

Choice B reason: Normal BUN levels are generally between 6 to 24 mg/dL⁸. A BUN level of 200 mg/dL is significantly elevated and suggests kidney dysfunction, which can lead to AKI.

Choice C reason: Serum osmolality in the normal range, which is typically between 275 to 295 mOsm/kg H2O for adults⁹[13][^10^][14][16], does not indicate an increased risk of AKI.

Choice D reason: The normal range for serum magnesium is typically 1.7 to 2.2 mg/dL or 0.85 to 1.10 mmol/L. A level of 2.0 mEq/L (which is equivalent to 2.0 mg/dL) is within the normal range and does not indicate an increased risk for AKI.

Choice A reason: In the oliguric phase of acute kidney injury, the creatinine level is expected to increase, not decrease, due to impaired kidney function and decreased filtration.

Choice B reason: The GFR is expected to decrease in acute kidney injury, not increase, as the kidneys' ability to filter

blood is compromised.

Choice C reason: Hyperkalemia, or high potassium levels in the blood, is a common finding in the oliguric phase of acute kidney injury due to decreased excretion of potassium by the kidneys.

Choice D reason: Hypomagnesemia, or low magnesium levels, is not typically associated with the oliguric phase of acute kidney injury. Instead, hypermagnesemia may occur due to decreased excretion of magnesium.