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.

Answer and Explanation

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.

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Free Nursing Study Resources

Correct Answer is A

Explanation

A) "Ventilation is the process of moving air into and out of the lungs."
Ventilation refers to the mechanical process of breathing, which involves the movement of air into and out of the lungs. During ventilation, air containing oxygen is drawn into the lungs through inhalation (inspiration), and carbon dioxide-rich air is expelled from the lungs through exhalation (expiration). This process facilitates the exchange of gases (oxygen and carbon dioxide) between the lungs and the external environment.

B) "Ventilation is taking a breath in."
This statement is too simplistic and does not fully encompass the process of ventilation, which includes both inhalation and exhalation. Ventilation involves not only taking a breath in but also the subsequent process of exhaling.

C) "Ventilation is the blood flow through the lung."
This statement describes perfusion, which is the process of blood flow through the lung's blood vessels, rather than ventilation, which involves air movement in and out of the lungs. Ventilation and perfusion are closely related but distinct processes.

D) "Ventilation is the process by which gases are exchanged."
While ventilation facilitates gas exchange, this statement does not fully capture the mechanical aspect of moving air into and out of the lungs, which is the primary function of ventilation. Gas exchange occurs in the alveoli of the lungs, where oxygen diffuses into the bloodstream, and carbon dioxide diffuses out of the bloodstream, but ventilation refers specifically to the movement of air.

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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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.)

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client asks the nurse what ventilation is. What is the most appropriate response by the nurse?

Correct Answer is A

Explanation

A nurse is preparing to administer valproic acid 500 mg PO. Available is valproic acid oral solution 250 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["10"]

Explanation

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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.)