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Related Experiment Videos

[Hemolysis can conceal another hemolysis]

P Desnos-Malchiodi1, C Zenner-Zerrouqa, D Bastit

  • 1Service de réanimation chirurgicale et d'anesthésiologie, CHU, I, Rouen, France.

Annales Francaises D'Anesthesie Et De Reanimation
|January 1, 1997
PubMed
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A delayed hemolytic reaction occurred in a patient with severe HELLP syndrome due to anti-Fy a antibodies, highlighting limitations in pre-transfusion antibody screening for low concentrations. Extended phenotype screening for high-risk patients is suggested.

Area of Science:

  • Obstetrics and Gynecology
  • Hematology
  • Transfusion Medicine

Background:

  • HELLP syndrome is a severe pregnancy complication associated with hemolysis and thrombocytopenia.
  • Red blood cell transfusions are sometimes necessary in managing severe HELLP syndrome.
  • Alloimmunization can complicate transfusion management, particularly in patients with multiple pregnancies.

Observation:

  • A patient with severe HELLP syndrome developed a delayed hemolytic reaction post-transfusion.
  • The reaction was attributed to the erythrocyte alloantibody anti-Fy a.
  • This antibody was initially undetectable despite standard pre-transfusion testing.

Findings:

  • Standard cross-matching and antibody screening tests may fail to detect low-concentration alloantibodies.

Related Experiment Videos

  • The patient received red blood cell transfusions matched for Rhesus and Kell antigens.
  • Delayed hemolysis underscores the potential for alloimmunization even with antigen-matched units.

    • Implications:

    • Consider extended red blood cell antigen phenotyping for high-risk patients, including those with a history of alloimmunization or multiple pregnancies.
    • Enhanced pre-transfusion testing protocols may be necessary to prevent delayed hemolytic transfusion reactions.
    • This case highlights the importance of vigilance and advanced serological evaluation in transfusion management for complex obstetric cases.