A nurse is witnessing a client sign the consent form for surgery. After signing the consent form, the client starts asking questions regarding the risks and benefits of a surgical procedure. What action by the nurse is most appropriate?

Choice A reason: Urine specific gravity of 1.010 is normal (1.005–1.030), indicating adequate hydration. Dehydration elevates specific gravity (>1.030) due to concentrated urine, so this client does not show dehydration signs, making this an incorrect choice for requiring fluid replacement interventions.

Choice B reason: Weight gain of 2.6 lbs in 24 hours suggests fluid retention, not dehydration. This may indicate hypervolemia, possibly from heart or renal failure, requiring diuretics. Dehydration involves weight loss, making this client’s finding inconsistent with dehydration needing intervention.

Choice C reason: Hematocrit of 45% is normal (38–50% males, 36–46% females). Dehydration elevates hematocrit due to hemoconcentration from reduced plasma volume. Normal hematocrit does not indicate dehydration, making this client an incorrect choice for requiring dehydration-specific fluid interventions.

Choice D reason: A BUN of 24 mg/dL is elevated (normal 7–20 mg/dL), indicating dehydration, as reduced renal perfusion concentrates blood urea nitrogen. This reflects hypovolemia, requiring fluid replacement to restore renal function and prevent acute kidney injury, making this client the priority for dehydration intervention.

Choice A reason: Hypovolemia is likely, as vomiting and diarrhea cause significant fluid loss, leading to dehydration. Confusion (from cerebral hypoperfusion), elevated temperature (from concentrated blood), and dry mouth (from reduced saliva) reflect low intravascular volume, making this the most fitting diagnosis for the client’s condition.

Choice B reason: Hypernatremia results from excessive sodium relative to water, often from inadequate water intake. Vomiting and diarrhea deplete water and electrolytes, causing hypovolemia, not sodium excess. Confusion and fever align with dehydration, making hypernatremia an incorrect diagnosis in this scenario.

Choice C reason: Hypokalemia may occur with diarrhea due to potassium loss, but confusion, fever, and dry mouth primarily reflect hypovolemia from fluid loss. Potassium loss is secondary, as hypovolemia’s systemic effects are more immediate, making this a less comprehensive diagnosis for the client’s symptoms.

Choice D reason: Metabolic acidosis can occur with diarrhea due to bicarbonate loss, but confusion, fever, and dry mouth primarily reflect hypovolemia from fluid loss. Acidosis may contribute, but hypovolemia drives these systemic signs, making it the more accurate diagnosis in this context.