Question

Which test would the nurse identify as specific for the diagnosis of myasthenia gravis?

a) Electromyography
b) Pyridostigmine test
c) Edrophonium chloride test
d) History of physical deterioration

Answer 1

The edrophonium chloride test is the specific diagnostic procedure used to diagnose myasthenia gravis, a condition marked by immune system interference with acetylcholine receptors causing muscle weakness.

Step-by-step explanation:

The nurse would identify the edrophonium chloride test, also known as the Tensilon test, as specific for the diagnosis of myasthenia gravis. This diagnostic procedure involves the administration of edrophonium chloride, which temporarily blocks the breakdown of acetylcholine, thereby increasing the levels of acetylcholine at the neuromuscular junction.

This can temporarily improve muscle strength in patients with myasthenia gravis, as the condition is characterized by the immune system blocking acetylcholine receptors on muscle cells which leads to progressive muscle weakness and fatigue.