Acetylcholine Receptor Antibody

Alternate Names : ACHr Ab, Edrophonium Test, Anti-Acetylcholine Receptor Antibody

This test determines the amount of edrophonium in a person's body. Edrophonium is a molecule that stimulates muscle contractions.

Who is a candidate for the test?

The acetylcholine receptor antibody test is used to diagnose myasthenia gravis, a condition in which the muscles become tired and weak. It is also used to monitor reponse to therapy for myasthenia gravis.

How is the test performed?

A small puncture is made on the fingertip using a sharp needle. The finger is gently squeezed to obtain a drop of blood. The blood is placed on specially-treated paper that can detect antibodies to acetylcholine receptors in the blood.