Which result of the cross-matching blood test is most suitable for blood transfusion?

The most suitable condition for blood transfusion is when no agglutination occurs in the cross-matching test.

Cross-matching is a laboratory test used to determine compatibility between donor and recipient blood. In this test, donor red blood cells are mixed with recipient serum to observe whether agglutination occurs. If agglutination is observed, it indicates that the donor and recipient blood types are incompatible, making transfusion unsuitable. When donor and recipient blood types are fully compatible—i.e., no agglutination occurs in the cross-matching test—the risk of transfusion is minimized, effectively preventing transfusion reactions and other adverse effects.

If the donor and recipient blood types are not completely matched but only show mild agglutination in the cross-matching test, transfusion may still be considered. However, careful assessment of risks and benefits is required, along with selecting an appropriate transfusion method and dosage to minimize the likelihood of adverse reactions.