The nurse is administering nitroglycerin intravenously to alleviate chest pain. What is the therapeutic action of this medication?
Increases glomerular filtration, resulting in decreased venous return.
Enhances the contractility of the myocardium, increasing oxygen delivery.
Produces an immediate analgesic effect, relieving chest pain.
Increases the coronary blood supply and decreases the afterload.
The Correct Answer is D
Choice A rationale
Increasing glomerular filtration would result in increased urine output, not decreased venous return. This action is not directly related to the therapeutic action of nitroglycerin.
Choice B rationale
While enhancing the contractility of the myocardium would increase oxygen delivery, this is not the primary action of nitroglycerin. Nitroglycerin primarily works by dilating the blood vessels, which reduces the amount of work the heart has to do and increases the blood supply to the heart muscle.
Choice C rationale
Nitroglycerin does not produce an immediate analgesic effect. While it can relieve chest pain, it does so by increasing blood flow to the heart, not by acting as an analgesic.
Choice D rationale
Nitroglycerin increases the coronary blood supply and decreases the afterload314. By dilating the blood vessels, nitroglycerin reduces the amount of work the heart has to do and increases the blood supply to the heart muscle. This is the primary therapeutic action of nitroglycerin in alleviating chest pain.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Redness on both sides of the sternal incision could indicate a normal inflammatory response post-surgery or could be a sign of infection. However, it is not the most crucial observation to report in the context of a patient who has undergone coronary artery bypass grafting using a right radial artery graft.
Choice B rationale
Fine crackles heard at both lung bases could indicate fluid accumulation in the lungs, possibly due to heart failure or pneumonia. While this is a significant finding that requires further investigation, it is not the most crucial observation in this specific context.
Choice C rationale
Complaints of incisional chest pain are common after coronary artery bypass grafting. Pain management is an important part of post-operative care, but this symptom is not the most crucial to report in this context.
Choice D rationale
Pallor and weakness of the right hand could indicate compromised blood flow to the hand, which is a serious complication considering the right radial artery was used for the graft. This could lead to ischemia and tissue damage in the hand, thus it is the most crucial observation to report to the healthcare provider.
Correct Answer is D
Explanation
Choice A rationale
Cramping of the toes is not typically associated with a positive Homans sign. Homans sign is a test used to check for deep vein thrombosis (DVT), a blood clot in a deep vein of the leg. While cramping can occur with DVT, it is not specific to this condition and can occur with many other conditions.
Choice B rationale
Blanching of the sole is not associated with a positive Homans sign. Blanching, or whitening of the skin, can occur with various conditions, but it is not a typical sign of DVT45.
Choice C rationale
Resisting dorsiflexion is not a typical response indicating a positive Homans sign. While pain or resistance during dorsiflexion of the foot can occur with various conditions, it is not a specific sign of DVT45.
Choice D rationale
Pain in the calf area during dorsiflexion of the foot (Homans sign) can indicate a positive sign for DVT. However, it’s important to note that Homans sign is not a reliable or definitive test for DVT. Other diagnostic tests, such as ultrasound, are needed to confirm the diagnosis.
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