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 Set Up
Monday - Saturday
Analytic Time

4 - 10 days

Soft Order Code
MiChart Code
Cell Bound Platelet Autoantibody (Mayo)
  • 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
Reference Laboratory
Special Testing
Specimen Requirements
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 Handling

Specimen must be kept ambient.

Alternate Specimen
Pink top EDTA tubes are acceptable.
Test is not available for neonates (<31 days old).
Normal Volume
20 mL EDTA whole blood
Minimum Volume
5 mL EDTA whole blood (Pediatric)
10 mL EDTA whole blood (Adult)
Storage Temperature
Strict ambient
Rejection Criteria
Specimens not stored ambient, or collected in EDTA tube
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.

CPT Code
Fee Code