A nurse is caring for a client who has diabetes insipidus (DI) and is receiving vasopressin. The nurse should identify which of the following findings as an indication that the medication is effective?

Choice A reason: Viral hepatitis, particularly hepatitis A, spreads via contaminated water or food. Avoiding foods prepared with tap water in high-risk areas prevents ingestion of the virus, which is transmitted feco-orally, making this a key preventive measure and the correct choice.

Choice B reason: Covering sores with bandages prevents hepatitis B or C transmission via blood contact, not acquisition. Avoiding this practice increases transmission risk, not prevention, making this choice incorrect for client education.

Choice C reason: Avoiding meat is unrelated to viral hepatitis prevention. Hepatitis is transmitted via contaminated food, water, or blood, not specifically meat. This instruction is irrelevant and does not reduce infection risk, making it incorrect.

Choice D reason: Handwashing after eating prevents hepatitis A by removing potential viral particles from hands, a key preventive measure. Avoiding handwashing increases infection risk, making this choice incorrect and contrary to hygiene guidelines.

Choice A reason: Increased hunger is not associated with SIADH, which involves excessive antidiuretic hormone causing water retention. Hunger is more related to metabolic or hypothalamic disorders. SIADH affects fluid and electrolyte balance, primarily leading to hyponatremia, not appetite changes, making this choice incorrect.

Choice B reason: Hypernatremia is not expected in SIADH. Excessive antidiuretic hormone causes water retention, diluting serum sodium and leading to hyponatremia. Hypernatremia occurs in conditions like diabetes insipidus with water loss, not SIADH’s water excess, making this an incorrect manifestation.

Choice C reason: Hyponatremia is a hallmark of SIADH, as excessive antidiuretic hormone increases renal water reabsorption, diluting serum sodium (below 135 mEq/L). This can cause neurological symptoms like confusion, especially post-craniotomy, where brain injury may trigger ADH release, making this the expected finding.

Choice D reason: Weight loss is not typical in SIADH, which causes water retention, leading to weight gain from fluid accumulation. Weight loss occurs in conditions like diabetes insipidus with water loss, not SIADH’s fluid retention, making this an incorrect manifestation for the condition.