Jane, a 20-year old college student is admitted to the hospital with a tentative diagnosis of myasthenia gravis. She is scheduled to have a series of diagnostic studies for myasthenia gravis, including a Tensilon test. In preparing her for this procedure, the nurse explains that her response to the medication will confirm the diagnosis if Tensilon produces:
The client shows a marked improvement of muscle strength.
The client has muscles become weakened due to the impaired ability to respond to nerve signals
There is reduced amplitude of electrical stimulation in the muscle.
The anti-acetylcholine receptor antibodies are present.
The Correct Answer is A
Choice A rationale: The Tensilon test involves injecting edrophonium, and in myasthenia gravis, temporary improvement in muscle strength confirms the diagnosis by demonstrating increased acetylcholine activity at the neuromuscular junction.
Choice B rationale: This describes the pathophysiology of myasthenia gravis but doesn’t directly confirm the diagnosis via the Tensilon test.
Choice C rationale: While this may be seen in myasthenia gravis, the Tensilon test specifically aims to observe improved muscle strength after administration.
Choice D rationale: While the presence of these antibodies is a characteristic of myasthenia gravis, the Tensilon test is used to assess the immediate response to the medication for diagnostic confirmation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale: Bell's palsy is not caused by a bacterial infection; hence, antibiotics are not the primary treatment.
Choice B rationale: Corticosteroids like prednisone are often used to reduce inflammation and improve symptoms in Bell's palsy.
Choice C rationale: While vitamins can support overall health, they are not the primary treatment for Bell's palsy.
Choice D rationale: Surgery is not the primary treatment for Bell's palsy unless certain complications arise.
Correct Answer is D
Explanation
Choice A rationale: These are symptoms of advance renal failure. Stomatitis and diarrhea are signs of uremia, which is the accumulation of waste products in the blood.
Choice B rationale: Dyspnea and anuria are signs of fluid overload and kidney shutdown and indicate advanced renal failure.
Choice C rationale: Confusion and vomiting are signs of acidosis and electrolyte disturbances and occur in advanced stages of renal failure.
Choice D rationale: One of the early symptoms of renal insufficiency is nocturia, which is the need to urinate frequently at night. This occurs because the kidneys are unable to concentrate urine during the day and produce more urine at night. Another early symptom is oliguria, which is the production of less than 400 mL of urine per day. This occurs because the kidneys are unable to excrete enough urine to maintain fluid balance.
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