A test that is used to diagnose myasthenia gravis (MG) is ordered by the physician. Because the test involves an injection of a drug that makes muscle strength improve for about five minutes, the nurse realizes that this test likely is

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The injection of a drug that improves muscle strength for a short period of time is a characteristic of the Tensilon (edrophonium) test, which is commonly used to diagnose myasthenia gravis. The other options listed do not involve the administration of a drug that would have this effect.

A Test That Is Used to Diagnose Myasthenia Gravis (MG)