General

Synonym/Acronym:
AChR, AChR-binding antibody, AChR-blocking antibody, and AChR-modulating antibody.

Rationale
To assist in confirming the diagnosis of myasthenia gravis (MG) and monitor response to treatment.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction.

Normal Findings
(Method: Radioimmunoassay) AChR-binding antibody: Less than 0.4 nmol/L; AChR-blocking antibody: Less than 25% blocking; and AChR-modulating antibody: Less than 45% modulating.

Critical Findings and Potential Interventions
N/A