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 B
Explanation
Choice A rationale
Vision may be temporarily blurred after intraocular lens surgery, but significant vision reduction for 48 hours is not typical and should be reported to a healthcare provider.
Choice B rationale
Restricting lifting objects greater than 10 pounds is crucial to prevent increased intraocular pressure and potential complications after surgery.
Choice C rationale
Aspirin should be avoided as it can increase the risk of bleeding. Alternative pain relief methods should be used.
Choice D rationale
Warm compresses are not recommended as they can increase inflammation and discomfort. Cold compresses may be more appropriate.
Correct Answer is A
Explanation
Choice A rationale
Administering the medications 5 minutes apart ensures that each medication has enough time to be absorbed without interference from the other. This practice helps to maximize the effectiveness of both medications and reduces the risk of adverse interactions.
Choice B rationale
Touching the tip of the dropper to the sclera of the eye can introduce contaminants and increase the risk of infection. It is important to avoid contact between the dropper and the eye to maintain sterility.
Choice C rationale
Holding pressure on the conjunctival sac for 2 minutes is not necessary for the administration of timolol and pilocarpine eye drops. This practice is more commonly recommended for other types of eye medications to increase absorption.
Choice D rationale
Contact lenses should be removed before administering eye drops to prevent contamination and ensure proper absorption of the medication. Wearing contact lenses during administration can interfere with the effectiveness of the drops.