What is the purpose of administering diphenhydramine before a blood transfusion?
To expand the blood volume.
To enhance clotting factors.
To avoid fever and chills.
To prevent urticaria.
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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Correct Answer is D
Explanation
Choice A rationale
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Choice B rationale
Malignant melanoma is a more aggressive form of skin cancer that often appears as a new, unusual growth or a change in an existing mole.
Choice C rationale
Squamous cell carcinoma typically appears as a firm, red nodule or a flat lesion with a scaly, crusted surface.
Choice D rationale
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Correct Answer is D
Explanation
Choice A rationale
Use of eye drops helps manage intraocular pressure but does not improve vision over time. The goal is to prevent further vision loss.
Choice B rationale
Double vision is not a common symptom of glaucoma. Glaucoma typically affects peripheral vision first.
Choice C rationale
Glaucoma is caused by increased intraocular pressure, not inadequate production of fluid within the eye.
Choice D rationale
Without treatment, glaucoma can cause blindness. It is essential to manage the condition to prevent vision loss.