A nurse is preparing to administer an ophthalmic medication to a client.
Which of the following actions should the nurse plan to take?
Instill the ophthalmic medication directly on the client's cornea.
Ask the client to tightly squeeze their eyes shut after the instillation.
Clean the client's eye from the outer canthus to the inner canthus before instillation.
Apply pressure to the client's nasolacrimal duct after instillation.
The Correct Answer is D
Choice A rationale
Instilling ophthalmic medication directly on the cornea can cause irritation and discomfort. Medications should be administered in the conjunctival sac.
Choice B rationale
Asking the client to tightly squeeze their eyes shut after instillation can expel the medication, reducing its effectiveness. Gentle closing of the eyes is recommended.
Choice C rationale
Cleaning the eye from the outer canthus to the inner canthus is not the proper method. The correct method is to clean from the inner canthus to the outer canthus to avoid contaminating the inner eye.
Choice D rationale
Applying pressure to the nasolacrimal duct after instillation helps prevent the medication from draining into the nasolacrimal system, ensuring better absorption in the eye.
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Correct Answer is C
Explanation
Choice C rationale
The large intestine absorbs water and electrolytes from the remaining indigestible food matter, forming and eliminating solid waste (stool). This absorption process is vital for
maintaining the body's fluid and electrolyte balance.
Choice A rationale
The large intestine does not produce vitamin D; this occurs in the skin when exposed to sunlight. The large intestine’s primary functions are absorption and waste formation.
Choice B rationale
Preventing the reflux of food into the esophagus is the function of the lower esophageal sphincter, not the large intestine. The large intestine deals with waste processing rather than regulating esophageal function.
Choice D rationale
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Correct Answer is D
Explanation
Choice A rationale
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Choice B rationale
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Choice C rationale
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Choice D rationale
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