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Platelet / HLA Testing Services Winnipeg, MB - NPIRL

Canadian Blood Services, National Platelet Immunology Reference Laboratory (NPIRL), Winnipeg, MB,  provides HLA and HPA antigen typing and antibody investigation testing to assist health care providers in management of thrombocytopenic patients who require investigation for:

  • Platelet transfusion refractoriness
  • Fetal Neonatal alloimmune thrombocytopenia (FNAIT)
  • Post transfusion purpura (PTP)
  • Platelet function disorders

In addition, the Laboratory also types blood donors prior to being placed onto a national platelet registry. The registry is used to conduct searches to identify suitably compatible donors who can be used for patients that show no benefit from conventional platelet components.

Testing is provided by the Winnipeg, MB National Platelet Immunology Reference Laboratory for all Canadian locations/facilities.

Test Catalogue

Locate a test
Available Platelet/HLA Tests
Platelet/HLA Requisitions and Forms



HLA Disease Association – HLA-B27,  HLA-A, HLA-B, HLA-DR, HLA-DQ

Pharmacogenomic Testing – HLA-B*57:01

Platelet Immunology Requisition (PDF)
Neonatal Platelet Investigation – MaternalPlatelet Immunology Requisition (PDF)
Neonatal Platelet Investigation – PaternalPlatelet Immunology Requisition (PDF)
Neonatal Platelet Investigation – Neonate/Amniotic FluidPlatelet Immunology Requisition (PDF)
Platelet Allo Immunization InvestigationPlatelet Immunology Requisition (PDF)
Post Transfusion Purpura InvestigationPlatelet Immunology Requisition (PDF)
TRALI Investigation

Platelet Immunology Requisition (PDF)

TRALI Patient Data Form (PDF)

Critical Values

Diagnostic Services will  provide a faxed report, whenever possible,to the requesting facility or physician in the following cases

  • Positive HLA antibody screen or HPA antibody on a patient refractory to platelet transfusion. 
  • Positive HPA antibody on maternal NAIT sample or suspected PTP.
Requesting Test Results

Platelet Immunology patient test results are available by contacting NPIRL

Monday–Friday: 8 a.m.– 4:30 p.m. CT
Saturday and Sunday: Closed
Statutory holidays: Closed

Contact NPIRL 204-789-1152

Please provide the following information:

  • Patient first and last name 
  • PHN (Personal Health Number)
  • Date of birth
  • Hospital fax number

Report will be faxed to requesting hospital