Which laboratory value is expected with Graves' disease?
Decreased calcium
Decreased T4
Increased thyroid stimulating hormone (TSH)
Increased T3
The Correct Answer is D
Choice A reason: Graves’ disease, a form of hyperthyroidism, does not typically cause decreased calcium. It may lead to hypercalcemia due to increased bone resorption from elevated thyroid hormone levels, which enhance osteoclast activity, making decreased calcium an incorrect laboratory finding for this condition.
Choice B reason: Graves’ disease is characterized by increased thyroid hormone production, including elevated T4 due to autoimmune stimulation of the thyroid. Decreased T4 is associated with hypothyroidism, not hyperthyroidism, making this choice incorrect as it contradicts the pathophysiology of Graves’ disease.
Choice C reason: Increased TSH is seen in primary hypothyroidism, where the thyroid is underactive. In Graves’ disease, TSH is typically decreased due to negative feedback from elevated thyroid hormones (T3 and T4), making this choice incorrect for the expected laboratory profile.
Choice D reason: Graves’ disease causes hyperthyroidism, with increased production of thyroid hormones, including T3, due to autoantibodies stimulating TSH receptors. Elevated T3 levels drive metabolic symptoms like weight loss and tachycardia, making this the correct laboratory finding for Graves’ disease.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Compression stockings promote venous return, preventing blood stasis in the legs, a major risk factor for deep vein thrombosis (DVT), which can lead to pulmonary embolism. By improving circulation, they reduce clot formation, making this the correct preventive action.
Choice B reason: Medications promoting clotting increase the risk of pulmonary embolism by enhancing thrombus formation. Anticoagulants, not pro-coagulants, are used to prevent clots, making this choice incorrect as it would worsen the risk.
Choice C reason: Frequent bed rest increases the risk of pulmonary embolism by causing venous stasis, promoting clot formation in deep veins. Mobility reduces stasis and clot risk, making this choice incorrect for preventing pulmonary embolism.
Choice D reason: Reducing water intake leads to dehydration, increasing blood viscosity and clot risk, which can cause pulmonary embolism. Adequate hydration maintains blood fluidity, reducing thrombosis risk, making this choice incorrect for prevention.
Correct Answer is A
Explanation
Choice A reason: Pernicious anemia, caused by vitamin B12 deficiency from lack of intrinsic factor, leads to neurological damage, causing paresthesia (tingling/numbness). This is specific due to demyelination of peripheral nerves, making this the correct manifestation.
Choice B reason: Jaundice occurs in hemolytic anemias due to red cell breakdown, not pernicious anemia. B12 deficiency causes megaloblastic anemia without significant hemolysis, making jaundice non-specific and incorrect for this condition.
Choice C reason: Thrombocytopenia, low platelet count, is not specific to pernicious anemia. It may occur in other conditions but not typically in B12 deficiency, which primarily affects red cells, making this choice incorrect.
Choice D reason: Severe pain is not a specific feature of pernicious anemia. It may occur in sickle cell anemia or other conditions, but B12 deficiency causes neurological symptoms like paresthesia, making this choice incorrect.
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