Which endocrine disorder causes the client to have dilutional hyponatremia?
Diabetes insipidus (DI)
Hypothyroidism
Hyperthyroidism
Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
The Correct Answer is D
Reasoning:
Choice A reason: Diabetes insipidus causes hypernatremia due to excessive water loss from ADH deficiency, leading to polyuria and dehydration. This increases serum sodium concentration, not dilutional hyponatremia, which is characterized by low sodium due to water retention, making DI incorrect for this condition.
Choice B reason: Hypothyroidism affects metabolism through low thyroid hormone levels, causing symptoms like fatigue and weight gain. It does not directly cause dilutional hyponatremia, as it does not involve ADH or water retention. Sodium imbalances in hypothyroidism are rare and not dilutional in nature.
Choice C reason: Hyperthyroidism increases metabolism but does not typically cause dilutional hyponatremia. It may lead to dehydration from increased metabolic demand, but this does not involve excessive water retention or ADH dysfunction, which are necessary for dilutional hyponatremia to occur.
Choice D reason: SIADH causes dilutional hyponatremia due to excessive ADH, leading to water retention in the kidneys. This dilutes serum sodium, lowering its concentration. The increased fluid volume without corresponding sodium retention is the hallmark of SIADH, making it the correct endocrine disorder.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Reasoning:
Choice A reason: Offering large quantities of liquids frequently increases aspiration risk in clients with dysphagia from neurological disorders. Large volumes can overwhelm swallowing mechanisms, leading to choking or pneumonia. Controlled, small sips with proper positioning are safer to ensure nutrition without compromising airway safety.
Choice B reason: Allowing physical activity before meals may improve appetite but does not address swallowing difficulties. Activity does not facilitate safe swallowing in neurological disorders, where muscle coordination is impaired. Proper positioning and pacing during feeding are more effective to prevent aspiration and ensure nutritional intake.
Choice C reason: Helping the client sit upright and feeding slowly minimizes aspiration risk in neurological dysphagia. Upright positioning aligns the airway to prevent food or liquid entry, and slow feeding allows better coordination of swallowing muscles, reducing choking and ensuring adequate nutrition, critical for safe intake.
Choice D reason: Instructing the client to lie down while eating is dangerous in dysphagia, as it increases aspiration risk. Lying down allows food or liquids to enter the airway, potentially causing pneumonia. Upright positioning is essential to facilitate safe swallowing and prevent complications in neurological disorders.
Correct Answer is C
Explanation
Reasoning:
Choice A reason: Initiating thrombolytic therapy within 12 hours is too late for optimal ischemic stroke outcomes. Beyond 4.5 hours, the risk of hemorrhage outweighs benefits, as ischemic tissue becomes necrotic, reducing the effectiveness of thrombolytics like tPA in restoring blood flow and improving function.
Choice B reason: A 9-hour window for thrombolytic therapy exceeds the recommended time frame for ischemic stroke. After 4.5 hours, the risk of hemorrhagic transformation increases, and neuronal salvage is less likely due to prolonged ischemia, making this time frame ineffective for achieving optimal functional recovery.
Choice C reason: Thrombolytic therapy within 3 hours of ischemic stroke onset maximizes functional outcomes. Tissue plasminogen activator (tPA) dissolves clots, restoring blood flow to viable brain tissue. Early administration minimizes neuronal damage, reduces disability, and improves recovery, with guidelines supporting a 3–4.5-hour window for eligible patients.
Choice D reason: A 6-hour window for thrombolytics is beyond the optimal 3–4.5-hour period for ischemic stroke. While some patients may benefit up to 4.5 hours, delays increase hemorrhage risk and reduce the likelihood of salvaging ischemic tissue, leading to poorer functional outcomes compared to earlier intervention.
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