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 A
Explanation
Choice A rationale: Smoking is a risk factor for osteoporosis as it can interfere with calcium absorption and decrease bone density.
Choice B rationale: Moderate alcohol consumption isn't a significant risk factor for osteoporosis.
Choice C rationale: Generally, having a larger body stature is not considered a significant risk factor for osteoporosis.
Choice D rationale: While fractures during childhood can affect bone health, they might not necessarily predict osteoporosis risk in adulthood.
Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"D"}
Explanation
Choice A rationale: The lab results and clinical picture, such as weight loss, anorexia, and high blood glucose levels, point more toward a hyperglycemic state rather than severe hypoglycemia.
Choice B rationale: The client's elevated blood glucose levels, weight loss, and anorexia suggest a hyperglycemic state, possibly hyperosmolar hyperglycemic state, which requires fluid management and insulin to address the severe dehydration and high blood glucose levels.
Choice C rationale: Although high glucose levels are evident, the absence of significant acidosis (as seen in diabetic ketoacidosis) and extreme ketosis makes this diagnosis less likely.
Choice D rationale: The lab values and clinical presentation do not strongly align with a primary respiratory acidosis diagnosis, which typically involves changes in pH and carbon dioxide levels.
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