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 C
Explanation
Choice A rationale
White drainage on the eyelids is not a normal finding and should be reported to the surgeon. However, this is not a standard discharge instruction but rather a sign of potential infection.
Choice B rationale
Sleeping on the abdomen is not recommended after cataract surgery as it can increase pressure on the eye and disrupt healing. Patients are usually advised to sleep on their back or the unaffected side.
Choice C rationale
Avoiding lifting anything heavier than 4.5 kg (10 lb) for 1 week is a standard instruction to prevent increased intraocular pressure and ensure proper healing of the surgical site.
Choice D rationale
Bending at the waist to pick up objects can increase intraocular pressure and should be avoided. Patients are advised to bend at the knees instead.
Correct Answer is A
Explanation
Choice A rationale
Systemic lupus erythematosus (SLE) is an autoimmune disease that primarily affects connective tissue. The immune system mistakenly attacks healthy tissue, leading to inflammation and damage.
Choice B rationale
SLE does not originate in the peripheral vascular system, although it can cause complications in blood vessels.
Choice C rationale
While the lymphatic system is involved in immune responses, SLE primarily targets connective tissue.
Choice D rationale
SLE does not originate in skeletal tissue, though it can cause joint pain and arthritis.