Myasthenia Gravis - Case Study

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Points Awarded 24.00 Points Missed 2.00 Percentage 92.3% Diagnosis Shiri's husband, Alum, notices that her left eyelid is drooping and she tells him she is experiencing double vision. After another choking episode, Alum brings his wife back to the healthcare provider who now thinks she may have myasthenia gravis. Her healthcare provider administers a Tensilon (edrophonium chloride) test to help confirm the diagnosis of myasthenia gravis (MG). 1. Which response to the test indicates that Shiri has myasthenia gravis? A) No significant change in Shiri's neurovascular assessment. INCORRECT This result does not confirm that Shiri has MG. B) Reduced amplitude of electrical stimulation in Shiri's muscle. INCORRECT This is the expected result of an electromylogram (EMG) study for a client diagnosed with MG but it does not confirm the diagnosis. C) Antiacetylcholine receptor antibodies present in the blood. INCORRECT This is a serum diagnostic test that is positive in about 80% of clients with MG. This test is useful in follow-up effectiveness of therapy but does not confirm the diagnosis. D) A noticeably marked improvement in Shiri's muscle strength. CORRECT A noticeably marked improvement in Shiri's muscle strength. Clients with MG show a significant improvement of muscle strength that lasts approximately 5 minutes when Tensilon is injected. This test confirms the diagnosis. Shiri is diagnosed with myasthenia gravis. Shiri's husband tells the nurse he does not understand how myasthenia will affect his wife. 2. How should the nurse respond? A) An increased number of acetylcholine receptor sites causes muscle weakness. INCORRECT There is a decrease in the number of acetylcholine receptor sites, not an increase. B) A virulent virus destroys the covering of junctions between nerves and muscles. INCORRECT MG is

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