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
While a complete blood count (CBC) is an essential lab value for monitoring many conditions and potential side effects, it is not the primary concern when administering high doses of azithromycin, especially with co-administration of acetaminophen. The focus should be on liver function.
Choice B rationale
Urinalysis is useful in diagnosing and monitoring various conditions but is not directly relevant to monitoring the side effects of azithromycin and acetaminophen. These medications do not typically cause urinary abnormalities that would necessitate frequent urinalysis.
Choice C rationale
Electrolytes are not directly affected by azithromycin and acetaminophen use. Although monitoring electrolytes can be essential in broader contexts, these specific medications do not primarily impact electrolyte balance requiring focused monitoring.
Choice D rationale
Liver enzymes are the key lab values to monitor when administering high doses of azithromycin and acetaminophen. Both medications are metabolized by the liver and can cause hepatotoxicity. Monitoring liver enzymes helps in detecting early signs of liver damage and preventing further complications.
Correct Answer is D
Explanation
Choice A rationale
ACE inhibitors can cause teratogenic effects, meaning they can harm a developing fetus. Therefore, precautions should be taken to avoid pregnancy while taking these drugs.
Choice B rationale
Spermicidal jellies alone are not a highly reliable form of contraception. For women taking ACE inhibitors, a more reliable method of contraception is recommended to prevent pregnancy.
Choice C rationale
The minipill, a progestin-only contraceptive, is not the contraceptive of choice when the risk of teratogenic effects from ACE inhibitors is considered. Barrier methods are preferred to avoid potential drug interactions.
Choice D rationale
Barrier contraception, such as condoms or diaphragms, is recommended for women taking ACE inhibitors to prevent pregnancy due to the teratogenic risk associated with these drugs.
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