Result of determination of blood group of a person should be read by two people and possibly be confirmed on a second sample of blood, in order to avoid reading errors which are due to errors in technique.
The reading errors occured in determination of blood group are:
- Dirty glass;
- Bacterial contamination;
- Presence of micro-clots (false agglutination);
- there are not fulfilled: the proportion of red blood and serum; contradictory agglutination;
Errors occured during reading:
- reading late - dry edges (false agglutination);
- reading early - no agglutination or poor agglutination.
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