Alternative Names for Anti-Platelet Antibody Test
The anti-platelet antibody test is also known as platelet autoantibody test, antiplatelet glycoprotein-specific antibody test, or platelet-associated IgG (PAIgG) test 1, 2.
Specific Test Nomenclature
The terminology varies based on the testing methodology and what is being measured:
Direct vs. Indirect Testing
- Direct test: Measures antibodies bound to the patient's own platelets (platelet-associated antibodies)
- Indirect test: Measures free-floating antibodies in the patient's plasma or serum 2
Glycoprotein-Specific Assays
When testing for antibodies against specific platelet surface proteins, the test may be called:
- MAIPA (Monoclonal Antibody-specific Immobilization of Platelet Antigen assay) 2
- MACE (Monoclonal Antigen Capture ELISA) 2
- Anti-GPIIb/IIIa antibody test (targeting the GPIIb/IIIa glycoprotein complex)
- Anti-GPIb/IX antibody test (targeting the GPIb/IX glycoprotein complex) 2
Historical and General Terms
- Platelet antibody assay
- Antiplatelet antibody screening
- DAC test (Direct Antiglobulin Consumption test) 3
- DRC test (Direct Radioactive Coombs' test) 3
Clinical Context
The test is primarily used in the evaluation of immune thrombocytopenia (ITP), though routine testing is not recommended for diagnosis 1. The 2010 international consensus report notes that glycoprotein-specific antibody testing is not routinely recommended because platelet-associated IgG is elevated in both immune and non-immune thrombocytopenia, limiting its diagnostic specificity 1.
When the test is performed, direct tests measuring antibodies on platelets have higher sensitivity than indirect tests measuring free plasma antibodies, and glycoprotein-specific assays (like MAIPA or MACE) have higher specificity than general PAIgG detection by flow cytometry 2.