Test Overview

Test Methodology

Solid Phase Enzyme-Linked Immunosorbent assay (ELISA)

Test Usage

Diagnosis of idiopathic (autoimmune) thrombocytopenia purpura, immune thrombocytopenia associated with SLE or other disorders associated with autoimmune phenomena.

Reference Range*

Negative. If positive, glycoprotein specificity will be identified.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Presence of reactivity to some glycoproteins has no clearly established clinical significance. Patients who are septic may also have a positive test with reactivity against most glycoproteins.

Test Details

Days Test Performed

Monday - Saturday

Analytic Time

4 - 10 days

Soft Order Code


MiChart Code

Cell Bound Platelet Autoantibody (Mayo)

Test Updated

Update Type: Test Discontinued

Updated Date: 06/11/2020



Anti-platelet Antibodies
Anti-Platelet Antibody
Platelet Antibody
Platelet Antibody, Direct
Platelet Associated Antibody
Platelet Associated IgG
Cell Bound Platelet Autoab
CBPA Comment
Cell Bound Platelet Ab

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Laboratory Reference


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Specimen Requirements

Offsite Collection Instructions

Collect blood in a sufficient number of lavender top (EDTA) tubes. Send intact whole blood ambient within 24 hours of collection. The patient must have a platelet count above 10,000 mm3. Specimens are accepted Monday through Thursday only and not the day before a holiday (specimen must be received by MLabs by 6:00 pm). Please include the following information: 1) patient diagnosis 2) has patient had IVIG in the last 30 days? 3) has patient had a platelet transfusion in the last 72 hours? 4) a copy of the patient's platelet count results.

Special Handing

Specimen must be kept ambient.

Rejection Criteria

Specimens not stored ambient, or collected in EDTA tube


Test is not available for neonates (<31 days old).


Lavender Top Tube

Normal Volume

20 mL EDTA whole blood

Minimum Volume

5 mL EDTA whole blood (Pediatric)
10 mL EDTA whole blood (Adult)

Additional Information

Transfused platelets will interfere with the assay. Delay specimen collection until after 72 hours post platelet transfusion. Test sent to Mayo Medical Laboratories.

Billing Information

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