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Post-Transfusion Purpura
| Item | Value |
|---|---|
| Approval req'd? | REQUIRES INSURANCE INFORMATION, AUTHORIZATION FROM HEALTH CARE PROVIDER FOR TEST AND PRIOR APPROVAL BEFORE COLLECTION OF SAMPLES. . Contact Blood Bank at 3-1313 to coordinate testing. Blood bank will complete the Platelet & Neutrophil Immunology Lab Requisition and order the appropriate test code. he test will be entered as a Miscellaneous Outside Laboratory Test (MOLT). |
| Available Stat? | No |
| Test code | MOLT |
| Performed by | Blood Center of Wisconsin |
| Sendout? | Yes |
| Method | Flow cytometry, ELISA and PCR |
| Collection Instructions | See Information under Approval Req'd before submitting samples Specimens only accepted 8am-5pm Monday-Thursday, and up to noon on Fridays. Note: Samples must be received at the Blood Center of Wisconsin within 4 days of draw. |
| Container type | ACD Yellow top (x3) and Red top (x3) |
| Amount to Collect | 30 mL in ACD (yellow top) AND 20 mL in Red tops |
| Sample type | ACD whole blood AND serum |
| Preferred volume | 30 mL ACD blood, AND 10 mL serum |
| UCSF Rejection Criteria | Samples collected outside of acceptable time frames. |
| Processing notes | Forward whole blood Yellow (ACD) and Red top tubes to China Basin for Federal Express pickup at 4:00 pm.Monday-Friday. Mark Federal Express shipping form for next day delivery. Samples must be received within 4 days of draw date at the Blood Center of Wisconsin. China Basin will ship specimens on ice pack, and protect whole blood from freezing by wrapping in paper towel. Place requisition into plastic bags and seal. Use an insulated container, place in a sturdy cardboard box and mark box REFRIGERATE UPON ARRIVAL. PLEASE CALL THE LABORATORY (800 -245-3117, ext 6255) FOR ADVICE IF YOU WILL SHIP SAMPLES NEAR A MAJOR HOLIDAY. Shipping Address: Client Services/PNIL, Blood Center of Wisconsin, 638 North 18th St., Wilwaukee, WI 53232-2121 Phone: 800 245-3117, ext 6396 |
| Ref Lab Rejection Criteria | Samples > 4 days old when received. Whole blood sample received frozen. |
| Normal range | Negative |
| Synonyms | P1A1; P1A2; Bak; Pen; PTP |
| Stability | Samples must be received within 4 days of draw date at the Blood Center of Wisconsin. |
| Turn around times | 1-2 weeks |
| Additional information | Post-transfusion purpura may arise from the cross-reaction of antibodies to transfused platelets with the patient's own platelets in the 2% of the general population whose platelets lack the common PlA1 antigen or other less common antigens such as PlA2, Bak and Pen or, more rarely, following the administration of blood products collected from previously sensitized donors. It is most common in multiparous women and in previously transfused patients. |
| CPT coding | 83891-90,83896-90 x18,83900-90,83901-90 x5, 83912-90,86022-90 x11 |
| Last Updated | 10/18/2012 12:26:46 PM |
| Entry Number | 763 |
If you have additional questions regarding this test, please call: 415-353-1667