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. A client with chest congestion and thick mucus: Guaifenesin is an expectorant that thins and loosens mucus in the airways, making it easier to cough up and clear secretions. It is indicated for clients with productive coughs and chest congestion.
B. A client experiencing anaphylaxis: Anaphylaxis is a severe, life-threatening allergic reaction that requires immediate treatment with epinephrine, antihistamines, and supportive care. Guaifenesin does not address the pathophysiology of anaphylaxis.
C. A client with recurrent epistaxis: Recurrent nosebleeds are not treated with guaifenesin. Management involves identifying the underlying cause, nasal care, or topical interventions rather than an expectorant.
D. A client with seasonal allergies: Seasonal allergies primarily cause sneezing, itching, and watery eyes. Antihistamines or intranasal corticosteroids are indicated, whereas guaifenesin does not relieve allergy symptoms.
Correct Answer is B
Explanation
A. Report clear-colored sputum to the provider: Clear-colored sputum is typically normal and not an indication of infection or complication. The client does not need to report it unless accompanied by other concerning symptoms.
B. Increase your oral fluid intake: Guaifenesin is an expectorant that works by thinning and loosening mucus in the airways. Increasing fluid intake helps optimize its effectiveness, making coughs more productive and facilitating mucus clearance.
C. Report symptoms that last longer than 2 days: Symptoms of a sinus infection often last longer than two days, and short-duration monitoring is insufficient. Clients are usually advised to report persistent or worsening symptoms after about 7–10 days, so this instruction is inaccurate.
D. This medication will stop your cough: Guaifenesin does not suppress cough; instead, it loosens mucus to make coughing more productive. Telling the client it will stop their cough could lead to misunderstanding of the medication’s purpose and effectiveness.
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