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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Correct Answer is D

Explanation

A) Low-back pain:
Low-back pain is not a common manifestation of an allergic reaction to a blood transfusion. It may be associated with other conditions, such as musculoskeletal issues or renal complications, but it is not typically addressed by diphenhydramine administration during transfusion.

B) Fever:
While fever can occur as a manifestation of an adverse reaction to a blood transfusion, it is more commonly associated with non-allergic transfusion reactions such as transfusion-related acute lung injury (TRALI) or bacterial contamination of the blood product. Diphenhydramine is not specifically indicated for the prevention of fever during transfusion.

C) Dyspnea:
Dyspnea, or difficulty breathing, can occur as a manifestation of a severe allergic reaction or anaphylaxis during a blood transfusion. However, diphenhydramine alone may not be sufficient to prevent or treat severe respiratory symptoms associated with anaphylaxis. In such cases, prompt medical intervention and administration of epinephrine may be necessary. Diphenhydramine primarily targets histamine-mediated symptoms such as urticaria and itching.

D) Urticaria.
Urticaria, commonly known as hives, is a skin reaction characterized by raised, itchy welts that can occur as a result of an allergic or hypersensitivity reaction. During a blood transfusion, if the recipient's immune system reacts to foreign proteins in the transfused blood, it can lead to an allergic reaction characterized by symptoms such as urticaria, itching, flushing, and sometimes more severe reactions like anaphylaxis.
Diphenhydramine is an antihistamine medication that works by blocking the effects of histamine, a chemical released by the body during allergic reactions. By administering diphenhydramine before the blood transfusion, the nurse aims to prevent or minimize the occurrence of urticaria and other allergic symptoms.

Correct Answer is ["28"]

Explanation

To calculate the IV infusion rate in drops per minute (gtt/min), you can use the following formula:

IV infusion rate (gtt/min) =(Total volume (mL)×Drop factor (gtt/mL)) / Total time (min)

Given:

Total volume = 1000 mL

Drop factor = 10 gtt/mL

Total time = 6 hours = 6 hours × 60 minutes/hour = 360 minutes

Substitute the given values into the formula:

IV infusion rate (gtt/min) = (1000mL×10gtt/mL)/360 min

IV infusion rate (gtt/min) = 10,000/360

IV infusion rate (gtt/min)≈27.78gtt/min

Rounding to the nearest whole number, the IV infusion rate is approximately 28 gtt/min

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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.)

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Naxlex Comprehensive Predictor Exams

A nurse is preparing to administer diphenhydramine to a client who is to receive a blood transfusion. The nurse should explain that the purpose of diphenhydramine is to prevent which of the following manifestations of a transfusion reaction?

Correct Answer is D

Explanation

Correct Answer is ["28"]

Explanation

The nurse explains to the client why inhalation medications work rapidly. What should the nurse include in the teaching? (Select All that Apply.)

A nurse is preparing to administer diphenhydramine to a client who is to receive a blood transfusion. The nurse should explain that the purpose diphenhydramine is to prevent which of the following manifestations of a transfusion reaction?

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The healthcare provider has ordered 1000 mL of 0.9% sodium chloride to be administered intravenously over 5 hours. The drop factor on the tubing is 15 drops/mL. How many milliliters per hour will you administer and how many drops per minute?

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.)