A patient exhibits ptosis of both eyes and the provider orders edrophonium (Tensilon). The nurse notes immediate improvement of the ptosis.
The nurse understands that this patient most likely has which disorder?
Myasthenia gravis.
Cerebral palsy.
Multiple sclerosis.
Muscle spasm.
The Correct Answer is A
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. .
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Evidence of human fetal risk would categorize the drug as Category D or X, not Category B.
Choice B rationale
This statement aligns more with Category C drugs, where animal studies show adverse effects, but not Category B.
Choice C rationale
This describes Category A drugs, not Category B.
Choice D rationale
Category B drugs have shown no risk in animal studies but lack adequate human studies, fitting this description.
Correct Answer is C
Explanation
Choice A rationale
Constipation can be a side effect of Parkinson's disease and dopaminergic medications, but it is not a primary safety concern compared to the risk of injury.
Choice B rationale
Risk for injuries related to cardiovascular effects and peripheral vascular disease is a concern, but the risk of orthostatic hypotension presents a more immediate danger for falls.
Choice C rationale
Parkinson's disease and its treatments can cause orthostatic hypotension, significantly increasing the risk of falls and injury. This risk needs to be carefully managed in the patient's care plan.
Choice D rationale
Diarrhea is not commonly associated with Parkinson's disease or its treatments. Constipation is more prevalent due to both the disease and dopaminergic medication effects.
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