A patient has been extremely fatigued for the past 2 months and is having difficulty lifting even light objects at work. The physician suspects myasthenia gravis (MG) and asks the nurse to assist with a Tensilon test
What patient response to the Tensilon test leads the nurse to suspect myasthenia gravis?
a. The patient's ptosis is temporarily improved.
b. The patient becomes dyspneic.
c. The patient's muscles become very weak.
d. The patient develops muscle cramps.
ANS: A
A test for MG involves an intravenous injection of edrophonium (Tensilon, an anticholinesterase drug). If muscle strength improves dramatically (e.g., the patient can suddenly open the eyes wide), MG is diagnosed. Dyspnea, weakness, or cramping is not expected after Tensilon administration.
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