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Tensilon test   

Overview | Risks | Results

Definition:

In this test, the drug Tensilon is administered, and muscle response is evaluated to help diagnose myasthenia gravis (a chronic, progressive disease characterized by weakness of the voluntary muscles).

How the Test is Performed

The drug Tensilon is slowly given through an intravenous line. The health care provider may want to fatigue your muscles by having you do various exercises such as counting to 100 until your voice diminishes, or holding your arms above your shoulders until they drop. The rest of the Tensilon is then given. You will be asked to perform some repetitive muscular movements like crossing and uncrossing your legs with particular attention paid to whether your muscle strength is improved by the Tensilon. The test may be repeated and additional Tensilon may be given to help differentiate between myasthenia gravis and other conditions.

How to Prepare for the Test

There may be no preparations, however you should follow any diet or directions prescribed by your health care provider.

How the Test will Feel

There will be a sharp prick as the IV needle is inserted. There may be some side effects from the drug.

Why the Test is Performed

The test helps diagnosis myasthenia gravis, may aid in differentiation between myasthenic and other similar neurological conditions, and may be used to monitor oral anticholinesterase therapy.

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