The nurse is caring for a client who has thrombocytopenia.
Which of the following will the nurse administer for this disorder?
Corticosteroid.
Diphenhydramine.
Desmopressin (DDAVP).
Hydrochlorothiazide (HCTZ).
The Correct Answer is A
Choice A rationale
Corticosteroids are used in thrombocytopenia because they suppress the immune response, particularly in immune thrombocytopenic purpura (ITP). They reduce platelet destruction by inhibiting autoantibody formation and increasing platelet lifespan. Normal platelet count ranges from 150,000 to 400,000/µL. Thrombocytopenia occurs when platelets drop below 150,000/µL, increasing bleeding risk. Corticosteroids can also decrease capillary permeability, minimizing petechiae and ecchymoses.
Choice B rationale
Diphenhydramine, an antihistamine, is used for allergic reactions but has no role in treating thrombocytopenia. It does not address the underlying immune or hematologic causes of low platelet counts. Its primary actions include H1 receptor antagonism, reducing histamine-mediated symptoms like itching and swelling. However, it lacks immunosuppressive or hematologic-stimulating effects essential for managing thrombocytopenia.
Choice C rationale
Desmopressin (DDAVP) is a synthetic antidiuretic hormone analog used for certain bleeding disorders like von Willebrand disease or mild hemophilia A. It increases factor VIII and von Willebrand factor levels, improving clotting. However, it is not indicated for thrombocytopenia as it does not address platelet count deficiencies or immune-mediated platelet destruction.
Choice D rationale
Hydrochlorothiazide (HCTZ) is a thiazide diuretic used for hypertension and edema. Its mechanism of action involves inhibiting sodium reabsorption in the distal tubule, promoting diuresis. HCTZ has no effect on platelet counts or immune mechanisms and is not used in thrombocytopenia. Its side effects, like electrolyte imbalances, may complicate patient management.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Amlodipine, a calcium channel blocker, primarily acts on vascular smooth muscles to reduce blood pressure. It does not directly affect renal function or significantly increase urine output. This statement reflects a misunderstanding of the drug's mechanism of action.
Choice B rationale
Edema, a common side effect of amlodipine, is due to vasodilation and capillary leakage, particularly in lower extremities. However, sudden discontinuation of the medication may lead to rebound hypertension and should be avoided. Reporting side effects is crucial for alternative management.
Choice C rationale
Amlodipine does not necessitate routine potassium monitoring as it does not significantly affect potassium homeostasis. This requirement is more commonly associated with potassium-wasting diuretics or renin-angiotensin-aldosterone system modulators.
Choice D rationale
Constipation and abdominal pain, although less common, may occur due to gastrointestinal motility changes caused by smooth muscle relaxation. Prompt reporting ensures timely assessment and potential treatment modifications to enhance adherence.
Correct Answer is C
Explanation
Choice A rationale
Referring the client to see an optometrist is inappropriate because visual disturbances can be a sign of digoxin toxicity, which requires immediate medical attention rather than routine visual examination. Toxicity manifests due to elevated serum digoxin levels, with symptoms including blurred vision and yellow-green halos. Normal digoxin range is 0.5-2.0 ng/mL.
Choice B rationale
Asking if the client wears glasses or contact lenses does not address the root cause of visual disturbances, which is likely linked to digoxin toxicity. Such queries delay prompt medical intervention needed to evaluate and manage the client’s condition. Ocular aids are unrelated to pharmacological adverse effects.
Choice C rationale
Obtaining a prescription for stat laboratory tests is essential for assessing serum digoxin levels and electrolytes, particularly potassium, as hypokalemia increases sensitivity to digoxin toxicity. Prompt identification of toxicity allows timely interventions, including discontinuation of digoxin or administration of antidotes like Digibind.
Choice D rationale
Obtaining the client’s blood pressure is irrelevant in this scenario, as visual disturbances are not indicative of blood pressure abnormalities but rather digoxin toxicity. Immediate focus should be on confirming and managing toxicity through laboratory evaluation and clinical assessment.
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