If a patient’s urine output is 300 mL/hour and serum sodium rises to 150 mEq/L on post-op day 2 after transsphenoidal surgery for a pituitary adenoma, what does the nurse suspect?
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Correct answer: Postoperative diabetes insipidus
High urine output and rising sodium post pituitary surgery suggest DI due to ADH deficiency rather than SIADH, which causes low urine output and low sodium.
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