J.B.'s wife asks, "How do they know that my husband has myasthenia gravis?" What should
you tell her about how MG is diagnosed?
What will be an ideal response?
The diagnosis of MG can usually be made based on history and physical examination. The patient
usually reports that specific muscles become weak with activity and that a period of rest improves
function. Anti–acetylcholine receptor (AChR) antibody (Ab) test results are positive in as many
as 90% of patients who have generalized MG. Electromyography (EMG) may show a decreased
response to repeated stimulation of the hand muscles, indicative of muscle fatigue. Single-fiber
EMG is sensitive in confirming the diagnosis of MG. The Tensilon test in a patient with MG reveals
improved muscle contractility after IV injection of the anticholinesterase agent edrophonium
chloride (Tensilon). In patients with a confirmed diagnosis of MG, a chest computed tomography (CT)
scan may be done to evaluate the thymus.
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A) body weight. B) urine output. C) skin turgor. D) hematocrit levels.
The nurse is caring for a client in heart failure with signs of hypervolemia. Which vital sign is indicative of the disease process?
A) Low heart rate B) Elevated blood pressure C) Rapid respiration D) Subnormal temperature
The nurse notes that the infant has been feeding poorly over the last 24 hours. She should immediately assess for other signs of:
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How do thyroid replacement drugs affect diabetes?
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