Acetylcholine Receptor Blocking Antibody
Order Name
ACETY BLK
Test Number: 5500020
Revision Date 01/02/2024
Test Number: 5500020
Revision Date 01/02/2024
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Acetylcholine Receptor Blocking Antibody
|
See Test Notes | 42937-3 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 1 mL (0.3) | Serum | Clot Activator SST | Refrigerated |
| Alternate 1 | 1 mL (0.3) | Serum | Clot Activator (Red Top, No-Gel) | Refrigerated |
| Instructions | Notes: 0.3 mL (Note: This volume Does NOT allow for repeat testing.) Specimen Type: Red-top tube or gel-barrier tube Specimen Storage: Refrigerate Specimen Collection: If red-top tube is used, transfer separated serum to a plastic transport tube. Specimen Stability: Ambient: 13 days, Refrigerated : 13 days, Frozen: 13 days |
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| GENERAL INFORMATION | |
|---|---|
| Expected TAT | 3 - 7 days |
| Clinical Use | Blocking antibodies are detected in approximately 50% of generalized myasthenia gravis patients and are detectable in the absence of binding antibodies in approximately 1% of myasthenia gravis patients. |
| Performing Labcorp Test Code | 085926 |
| Notes | This assay measures antibodies that inhibit the binding of radiolabeled alpha-bungarotoxin (aBTX) to solublized muscle AChR. |
| CPT Code(s) | 86042 |
| Lab Section | Reference Lab |