Anticholinergic drugs are used in Ophthalmology because they produce what effect?
Pupil restriction.
Decreased lacrimal secretions.
Pupil dilation.
Sedation.
The Correct Answer is C
Choice A rationale
Anticholinergic drugs do not cause pupil restriction; they relax the muscles around the eye, leading to dilation.
Choice B rationale
Decreased lacrimal secretions are a secondary effect of anticholinergics and not their primary purpose in ophthalmology.
Choice C rationale
Anticholinergics cause pupil dilation (mydriasis) by relaxing the muscles that constrict the pupil, allowing for a better examination of the eye's interior.
Choice D rationale
Sedation is not a primary effect of anticholinergics used in ophthalmology.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Administering the medication even if the name of the drug can be clearly read is risky because the rest of the label might contain essential information like dosage, expiration date, and other critical instructions. Administering a medication without complete labeling increases the risk of medication errors.
Choice B rationale
Discarding the entire bottle and contents and obtaining a new bottle is the safest option. It ensures that the nurse is using a medication with a fully intact label, which includes all necessary information to safely administer the medication, such as dosage, route, and expiration date.
Choice C rationale
Asking another nurse to verify the contents of the bottle is not sufficient because the torn and soiled label still lacks complete information. Without all details, there's a risk of administering the wrong dosage or an expired medication.
Choice D rationale
Finding the drug information and making a new label for the bottle is not appropriate because it does not guarantee the accuracy of the dosage or other critical details that were on the original label. It's better to use a completely labeled and verified medication bottle.
Correct Answer is A
Explanation
Choice A rationale
Myasthenia gravis is an autoimmune neuromuscular disorder characterized by weakness and fatigue of the skeletal muscles. Improvement of ptosis after administration of edrophonium (Tensilon), a short-acting acetylcholinesterase inhibitor, is a diagnostic indicator of myasthenia gravis.
Choice B rationale
Cerebral palsy is a group of permanent movement disorders that appear in early childhood. It is primarily caused by abnormal development or damage to the brain and does not exhibit rapid improvement with edrophonium.
Choice C rationale
Multiple sclerosis is a chronic illness involving the central nervous system, where the immune system attacks the protective sheath (myelin) that covers nerve fibers. It does not respond to edrophonium as myasthenia gravis does.
Choice D rationale
Muscle spasm refers to an involuntary contraction of a muscle that can be sudden and painful. This condition is not typically diagnosed or treated with edrophonium, which is specific for myasthenia gravis. .
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