Cross matching; Rh typing; ABO blood typing
Normal Values
If your blood cells stick together when mixed with:
- Anti-A serum, you have type A blood
- Anti-B serum, you have type B blood
- Both anti-A and anti-B serums, you have type AB blood
If your blood cells do not stick together when anti-A and B is added, you have type O blood.
Back typing:
- If your blood clumps together when B cells are added to your sample, you have type A blood.
- If your blood clumps together when A cells are added to your sample, you have type B blood.
- If your blood clumps together when both types of cells are added to your sample, you have type O blood.
Lack of blood cells sticking together when your sample is mixed with both types of blood indicates you have type AB blood.
RH typing:
- If your blood cells stick together when mixed with anti-Rh serum, you have type Rh-positive blood.
- If your blood does not clot when mixed with anti-Rh serum, you have type Rh-negative blood.
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