Also known as the neuromuscular junction test, this procedure is used to diagnose neuromuscular diseases like myasthenia gravis or other neuromuscular disorders.

Procedure:
 
• A catheter (a long, thin, flexible plastic tube) is placed in a vein near the group of muscles affected by weakness.
• A small dose of the drug, Edrophonium, is injected through the catheter.
• The object of the test is to see if the drug will restore strength to the weakened muscle.
• If the drug does not restore power to the muscles within a minute or two, the dose is increased.
• When power does return, the effect lasts only a few minutes.
• The procedure is repeated several times.

Risks:

• The drug may temporarily cause nausea, dizziness, slow heartbeat, and blurred vision


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