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? Sodium: 152 mEq/L Potassium: 3.6 mEq/L Chloride: 105 mEq/L Glucose: 102 mg/dL BUN: 18 mg/dL Creatinine: 0.7 mg/dL

Choice A reason: Elevated sodium (hypernatremia) is a hallmark of dehydration, especially after exertion in hot weather. Normal potassium and renal markers support this diagnosis. Choice B reason: BUN and creatinine levels are within normal limits, and there is no evidence of protein deficiency in the labs provided. Choice C reason: SIADH typically presents with hyponatremia due to water retention, not hypernatremia. Choice D reason: Renal failure would show elevated BUN and creatinine, which are not present in this case.