The patient's family is asking questions about the medications used in the treatment for shock. The nurse explains that dopamine is one of the drugs being used and that it works:
(Select All that Apply.)
At high doses, to treat anaphylaxis.
At high doses, to increase cardiac output.
At low doses, to cause increased blood flow to the kidneys.
At low doses, to treat anaphylaxis.
To cause vasoconstriction and increase blood pressure.
Correct Answer : B,C,E
A. At high doses, to treat anaphylaxis: Dopamine is not used to treat anaphylaxis. Anaphylaxis is typically managed with medications such as epinephrine, antihistamines, and corticosteroids.
B. At high doses, to increase cardiac output: Dopamine is a medication commonly used in the treatment of shock, particularly in cases of hypotension. At higher doses, dopamine acts as a positive inotrope and increases cardiac contractility, thereby improving cardiac output and increasing blood pressure.
C. At low doses, to cause increased blood flow to the kidneys: At lower doses, dopamine primarily acts on dopaminergic receptors in the renal vasculature, leading to vasodilation of the renal blood vessels and increased renal perfusion. This can help improve renal blood flow and urine output, making it beneficial in cases of renal hypoperfusion or acute kidney injury.
D. At low doses, to treat anaphylaxis: Dopamine is not used to treat anaphylaxis at any dose. Anaphylaxis is managed with medications such as epinephrine, which acts on multiple receptors to reverse the systemic effects of the allergic reaction.
E. To cause vasoconstriction and increase blood pressure: Dopamine can also cause vasoconstriction, particularly at higher doses. This effect is mediated through its action on alpha-adrenergic receptors, leading to peripheral vasoconstriction and an increase in systemic vascular resistance, which in turn helps increase blood pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D","E"]
Explanation
A. Family history: Having a family history of peptic ulcers increases the risk of developing the condition, suggesting a genetic predisposition.
B. Blood type A: There is no direct association between blood type A and peptic ulcer disease.
C. Acetaminophen (Tylenol) intake for pain: Acetaminophen is generally considered safe for pain relief and is not a significant risk factor for peptic ulcer disease. However, nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin, ibuprofen, and naproxen are known to increase the risk of peptic ulcers.
D. Smoking tobacco: Smoking tobacco is a significant risk factor for peptic ulcer disease. Tobacco use increases stomach acid production, weakens the protective lining of the stomach and duodenum, and impairs the healing of ulcers.
E. Drinking caffeine: While caffeine consumption alone may not directly cause peptic ulcers, excessive intake of caffeinated beverages such as coffee, tea, and soda can aggravate existing ulcers by stimulating stomach acid production and increasing gastric acidity.
Correct Answer is ["10"]
Explanation
To administer the correct dose of valproic acid, which is 500 mg, when the available oral solution concentration is 250 mg per 5 mL, the nurse needs to calculate the volume of the solution required.
The calculation is as follows: (500 mg) / (250 mg/5 mL) = 2 x 5 mL = 10 mL.
Therefore, the nurse should administer 10 mL of the valproic acid oral solution to deliver a dose of 500 mg.
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