A nurse is caring for a client who is diagnosed with a deep vein thrombosis (DVT) and is receiving heparin. The client asks the nurse how long it will take for the heparin to dissolve the clot, which of the following responses should the nurse give?
"Depending on the level of your PT/INR, the clot will begin to dissolve."
"After the first dose, the clot will begin to dissolve."
"It usually takes heparin at least 2 to 3 days to reach a therapeutic blood level."
"Heparin does not dissolve clots. It stops new clots from forming."
The Correct Answer is D
A. "Depending on the level of your PT/INR, the clot will begin to dissolve.": This response is misleading, as heparin's effect is not primarily monitored by PT/INR; rather, heparin is monitored by activated partial thromboplastin time (aPTT). Moreover, heparin does not directly dissolve clots; it prevents further clot formation.
B. "After the first dose, the clot will begin to dissolve.": This statement inaccurately suggests that heparin has an immediate effect on dissolving existing clots. While heparin acts quickly to inhibit further clotting, it does not lead to the dissolution of clots after the first dose.
C. "It usually takes heparin at least 2 to 3 days to reach a therapeutic blood level.": This is not accurate for heparin, which has an immediate effect on coagulation. While the therapeutic effects can be optimized over several days, heparin begins to work right away to prevent further clotting.
D. "Heparin does not dissolve clots. It stops new clots from forming.": This response accurately describes the mechanism of action of heparin. Heparin prevents the extension of existing clots and the formation of new clots, but it does not actively dissolve clots. This clarification is essential for the client’s understanding of their treatment and expectations regarding DVT management.
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Correct Answer is C
Explanation
A) Beta Blockers: While beta blockers can be used to manage some side effects of various medications, they are not typically indicated for managing niacin-induced flushing. Their primary use is in cardiovascular conditions rather than specifically addressing flushing.
B) Calcium Channel Blockers: Calcium channel blockers are primarily used to treat hypertension and certain heart conditions. They do not specifically address the flushing associated with niacin and would not be the expected choice for this side effect.
C) NSAIDs: Nonsteroidal anti-inflammatory drugs (NSAIDs) can be effective in managing niacin-induced flushing. Administering an NSAID, such as ibuprofen, prior to taking niacin can help reduce the flushing response by inhibiting the prostaglandins that contribute to this side effect.
D) Fibric Acid Derivatives: These medications, such as gemfibrozil, are used to lower triglycerides and cholesterol levels, but they do not address the flushing side effect caused by niacin. Their mechanism of action is different and not focused on alleviating flushing symptoms.
Correct Answer is B
Explanation
A) Carvedilol: While carvedilol is a beta-blocker that can be used to treat hypertension, it is not considered a first-line treatment. Beta-blockers are typically used when other first-line agents are not effective or in specific situations such as heart failure or ischemic heart disease.
B) Lisinopril: Lisinopril is an ACE inhibitor and is considered a first-line treatment for hypertension. It effectively reduces blood pressure by inhibiting the angiotensin-converting enzyme, leading to vasodilation and decreased blood volume. Its well-documented efficacy and favorable side effect profile make it a common choice for initial therapy.
C) Clonidine: Clonidine is an alpha-2 adrenergic agonist that can lower blood pressure but is generally not used as a first-line treatment due to its side effects and potential for rebound hypertension if discontinued abruptly.
D) Doxazosin: Doxazosin is an alpha-1 blocker that can be used to treat hypertension but is not typically a first-line choice. It may be used in specific cases, such as in patients with benign prostatic hyperplasia, but other classes of medications are usually preferred for initial hypertension treatment.