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Related Experiment Videos

Platelet transfusions: the problem of refractoriness.

M F Murphy1, A H Waters

  • 1Department of Haematology, St Bartholomew's Hospital and Medical College, London, UK.

Blood Reviews
|March 1, 1990
PubMed
Summary
This summary is machine-generated.

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Platelet transfusion refractoriness, common in bone marrow failure, stems from HLA alloimmunization. Preventing this involves using leukocyte-poor blood products to reduce immune responses and improve transfusion efficacy.

Area of Science:

  • Hematology
  • Immunology
  • Transfusion Medicine

Background:

  • Platelet transfusion refractoriness affects 30-70% of patients with bone marrow failure.
  • Key causes include HLA alloimmunization and non-immune platelet consumption (e.g., DIC, sepsis, splenomegaly).

Purpose of the Study:

  • To review current management strategies for platelet transfusion refractoriness.
  • To explore methods for preventing HLA alloimmunization in multiply transfused patients.

Main Methods:

  • Initial management involves HLA-matched platelet donors for alloimmunized patients.
  • Platelet crossmatching aids in selecting compatible donors when HLA-matched donors fail.
  • Alternative treatments like plasma exchange and IVIg are used for refractory cases.

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Main Results:

  • HLA-matched donors improve responses in approximately 65% of alloimmunized patients.
  • Leukocyte-poor blood components reduce HLA alloimmunization from 50% to 20%.
  • Reduced alloimmunization correlates with a decreased incidence of refractoriness.

Conclusions:

  • HLA alloimmunization is a primary driver of platelet transfusion refractoriness.
  • Leukocyte depletion of blood products is crucial for preventing alloimmunization.
  • Advanced techniques may soon enable effective prevention of HLA alloimmunization.