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What is the purpose of administering diphenhydramine before a blood transfusion?

A.

To expand the blood volume.

B.

To enhance clotting factors.

C.

To avoid fever and chills.

D.

To prevent urticaria.

Answer and Explanation

The Correct Answer is D

Choice A rationale

 

Diphenhydramine does not expand blood volume. It is an antihistamine used to prevent allergic reactions.

 

Choice B rationale

 

Diphenhydramine does not enhance clotting factors. It is used to manage allergic reactions.

 

Choice C rationale

 

While diphenhydramine can help manage fever and chills, its primary purpose before a blood transfusion is to prevent allergic reactions.

 

Choice D rationale

 

Administering diphenhydramine before a blood transfusion helps prevent urticaria and other allergic reactions by blocking histamine release. .

 


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View Related questions

Correct Answer is A

Explanation

Choice A rationale

Cataracts cause the lens of the eye to become cloudy, leading to a decreased ability to perceive colors. This is due to the scattering of light as it passes through the cloudy lens, which reduces the clarity and vibrancy of colors.

Choice B rationale

Loss of peripheral vision is more commonly associated with glaucoma, a condition where increased intraocular pressure damages the optic nerve.

Choice C rationale

Seeing bright flashes of light and floaters is typically a symptom of retinal detachment, a serious condition where the retina pulls away from its normal position.

Choice D rationale

Loss of central vision is often linked to macular degeneration, a condition that affects the central part of the retina responsible for sharp, detailed vision.

Correct Answer is A

Explanation

Choice A rationale

Multiple sexual partners increase the risk of human papillomavirus (HPV) infection, which is a significant risk factor for cervical cancer.

Choice B rationale

Multiple pregnancies are not a significant risk factor for cervical cancer.

Choice C rationale

Late onset of menarche is not a significant risk factor for cervical cancer.

Choice D rationale

Use of a diaphragm is not a significant risk factor for cervical cancer.

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