The nurse is caring for a patient who has myasthenia gravis (MG) and is receiving pyridostigmine bromide (Mestinon). The nurse notes ptosis of both eyelids and observes that the patient has difficulty swallowing. What action will the nurse perform next?
a. Contact the provider to request an order for atropine sulfate.
b. Contact the provider to request an order for edrophonium chloride (Tensilon).
c. Report signs of cholinergic crisis to the provider.
d. Report signs of myasthenic crisis to the provider.
ANS: B
Overdosing and underdoing of AChE inhibitors have similar symptoms: muscle weakness, dyspnea, and dysphagia. Edrophonium may be used to diagnose MG or to distinguish between myasthenic crisis and cholinergic crisis since it is a very short-acting AChE inhibitor. When given, if the symptoms are alleviated, the cause is myasthenic crisis; if symptoms worsen, it is cholinergic crisis. Since patients can have similar symptoms, the nurse cannot report one or the other to the provider without more information.
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