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Unusual response to ABO incompatible blood transfusion
Transfusion
|November 1, 1975
Summary
A group O patient received group A blood without adverse effects. The patient cleared transfused cells and produced IgM anti-A antibodies, demonstrating a mild transfusion reaction.
Area of Science:
- Transfusion Medicine
- Immunology
Background:
- Blood group compatibility is crucial in transfusions.
- Mismatched transfusions can cause severe hemolytic reactions.
Observation:
- A group O recipient inadvertently received three units of group A red blood cells during surgery.
- The recipient had pre-existing anti-A agglutinins with a titer of 64 (128 by antiglobulin).
Findings:
- No signs of acute transfusion reaction were observed.
- 28% of circulating red blood cells were group A 17 hours post-transfusion, cleared by day 5.
- Anti-A antibody titers (antiglobulin) rose significantly, with IgM identified as the primary antibody responsible for hemolysis.
- The recipient experienced no adverse effects and remained healthy.
Implications:
- This case highlights the potential for ABO-incompatible red blood cell transfusion with minimal clinical sequelae.
- It underscores the importance of antibody type (IgM vs. IgG) in determining transfusion reaction severity.
- Further research into immune responses to minor blood group incompatibilities is warranted.