What is the therapeutic effect of a vasodilator?
Decreased inflammation
Increased heart rate
Decreased blood pressure
Increased platelet count
The Correct Answer is C
A. Decreased inflammation: Vasodilators primarily act on vascular smooth muscle to relax blood vessels, reducing systemic vascular resistance. They do not directly target inflammatory pathways, so reducing inflammation is not their therapeutic effect.
B. Increased heart rate: While some vasodilators may cause reflex tachycardia as a secondary response to lowered blood pressure, an increased heart rate is not the intended therapeutic effect. The primary goal is to reduce vascular resistance and blood pressure.
C. Decreased blood pressure: The main therapeutic effect of vasodilators is the relaxation of arterial and sometimes venous smooth muscle, which lowers systemic vascular resistance. This results in decreased blood pressure, easing the workload on the heart and improving tissue perfusion.
D. Increased platelet count: Vasodilators do not affect platelet production or function. Their mechanism of action is centered on vessel relaxation rather than hematologic changes, so platelet count remains unaffected.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. The client reports a recent onset of muscle pain: Muscle pain or weakness (myalgia) is a known adverse effect of atorvastatin and can indicate a serious complication such as rhabdomyolysis. This finding requires immediate assessment and possible adjustment of the medication regimen.
B. The client's high-density lipoprotein (HDL) increased: An increase in HDL is a desired effect of atorvastatin therapy. This finding is beneficial and indicates that the medication is helping improve lipid profile and cardiovascular risk.
C. The client started taking oral contraceptive pills: While statins can slightly increase the hormone levels of birth control pills, this is a known interaction but not an immediate clinical "finding" that would be as concerning as potential muscle breakdown.
D. The client's blood pressure is 116/78 while sitting: This blood pressure reading is within normal limits for an adult. It does not indicate a concerning clinical finding in the context of atorvastatin therapy.
Correct Answer is {"A":{"answers":"B"},"B":{"answers":"B"},"C":{"answers":"B"},"D":{"answers":"A"},"E":{"answers":"A"}}
Explanation
• A client diagnosed with pulmonary embolism: Anticoagulation is standard therapy to prevent clot propagation and reduce the risk of further thromboembolic events. Medications such as heparin or low-molecular-weight heparin are commonly initiated to manage pulmonary embolism. Early anticoagulation improves patient outcomes and reduces mortality.
• A post-operative client on bed rest: Prolonged immobility increases the risk for venous thromboembolism. Anticoagulation may be anticipated as a preventive measure, especially in clients with additional risk factors such as advanced age or comorbidities. Prophylactic therapy reduces the incidence of deep vein thrombosis and pulmonary embolism.
• A client with low platelet count: Anticoagulation increases the risk of bleeding in clients with thrombocytopenia. Low platelet count is a contraindication because these clients are prone to spontaneous bleeding and hemorrhage. Careful evaluation of bleeding risk is required before considering therapy.
• A client with history of hemophilia A: Hemophilia A is a congenital clotting disorder characterized by factor VIII deficiency. Anticoagulation in these clients would exacerbate bleeding tendencies and is contraindicated. Management focuses on preventing and treating bleeding episodes, not clot prevention.
• A client with an indwelling epidural catheter: Anticoagulation is contraindicated in clients with epidural catheters due to the risk of epidural hematoma formation. Hematomas can compress the spinal cord, causing permanent neurological damage. Anticoagulants are withheld until the catheter is safely removed and bleeding risk is minimized.
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