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 C
Explanation
Choice A rationale: Clients with Graves' disease may have increased sensitivity to light due to ocular manifestations like photophobia, so keeping the room well-lit may can cause eye irritation.
Choice B rationale: Encouraging frequent ambulation and exercise may worsen the symptoms of hyperthyroidism, such as tachycardia, palpitations, and tremors.
Choice C rationale: This is because clients with Graves' disease have an increased
metabolic rate and may experience weight loss, muscle wasting, and fatigue. A high- calorie and high protein diet can help prevent these complications and provide adequate nutrition for the client.
Choice D rationale: Placing extra blankets over the client may increase the body temperature and cause heat intolerance, which is another common symptom of Graves' disease.
Correct Answer is B
Explanation
Choice A rationale: This is not accurate since the manifestations of facial nerve paralysis are observed on the contralateral side which in this case is the left side of the face hence the right facial nerve is paralyzed.
Choice B rationale: Facial nerve paralysis cause symptoms such as drooping of the eyelid, cheek or mouth as depicted in the above picture. The right facial nerve is paralyzed since the nerve innervates the contralateral side hence the effects are demonstrated on the
left side of the face.
Choice C rationale: trigeminal nerve paralysis causes symptoms such as weakness in muscles of mastication, altered sensation over the face and tongue, and hearing impairment and not the symptoms depicted above.
Choice D rationale: trigeminal nerve paralysis causes symptoms such as weakness in muscles of mastication, altered sensation over the face and tongue, and hearing impairment and not the symptoms depicted above.
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