Acetylcholine Receptor Blocking Antibody
Also known as: ACHRBLO
Use
Approximately 85-90% of patients with myasthenia gravis (MG) express antibodies to the acetylcholine receptor (AChR), which can be divided into binding, blocking, and modulating antibodies. Blocking antibody may impair binding of acetylcholine to the receptor, leading to poor muscle contraction. This test is used for initial diagnostic testing for myasthenia gravis to identify the presence of blocking antibodies.
Special Instructions
Not provided.
Limitations
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
New York Approved
Methodology
Cell-based / Cytometry (Flow Cytometry)
Biomarkers
Acetylcholine Receptor Blocking Antibody
Antibody
LOINC Codes
- 42937-3 - AChR Block Ab/AChR Total SFr Ser
Result Turnaround Time
1-4 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Separate from cells ASAP or within 2 hours of collection.
Storage Instructions
Refrigerated.
Causes for Rejection
Contaminated, hemolyzed, or severely lipemic specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 48 hours |
| Refrigerated | 2 weeks |
| Frozen | 1 year (avoid repeated freeze/thaw cycles) |
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