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
Timolol is a beta-blocker used to reduce intraocular pressure in patients with open-angle glaucoma. It is not intended for short-term use or gradual tapering off. The medication must be used consistently to maintain its therapeutic effect.
Choice B rationale
Timolol should be applied on a regular schedule for the rest of the client’s life to effectively manage intraocular pressure and prevent further damage to the optic nerve.
Choice C rationale
Timolol does not cure glaucoma or normalize intraocular pressure permanently. Continuous use is necessary to control the condition.
Choice D rationale
Timolol is not used as a pain reliever. It is specifically prescribed to manage intraocular pressure in glaucoma patients.
Correct Answer is D
Explanation
Choice A rationale
This statement is incorrect. While the tubes are designed to allow air to enter the middle ear and prevent fluid buildup, water can still enter through the tubes and potentially cause infections or other complications. Therefore, it is important to take precautions to keep water out of the ears, especially during activities like swimming or bathing.
Choice B rationale
This statement is incorrect. Tympanostomy tubes are not designed to be removed every night. They are small tubes inserted into the eardrum to allow air to enter the middle ear and prevent fluid buildup. They remain in place until they naturally fall out on their own, which typically happens within 6 to 12 months.
Choice C rationale
This statement is incorrect. The tubes do not need to be replaced every 2 years. Tympanostomy tubes usually fall out on their own within 6 to 12 months. If they do not fall out naturally, a healthcare provider may need to remove them. However, routine replacement every 2 years is not necessary.
Choice D rationale
This statement is correct. Tympanostomy tubes are designed to fall out on their own, usually within 6 to 12 months after insertion. This natural process allows the eardrum to heal without the need for additional surgical intervention.