The ABO isoheamagglutinin titre (IHA) test is usually performed to determine if a person has developed antibodies to the ABO blood group antigens. This test can be useful in determining the compatibility of blood for transfusions or for monitoring patients with certain medical conditions, such as hemolytic disease of the newborn.
When this test is required
The ABO isoheamagglutinin titre (IHA) test is typically ordered by a healthcare provider when a person is going to receive a blood transfusion or organ transplant, or when a pregnant woman’s blood type is incompatible with that of the fetus. It may also be ordered when a person has a medical condition that affects the immune system or when a person is being monitored for certain medical treatments.
What the Test Detects
The ABO isoheamagglutinin titre (IHA) test measures the level of antibodies that a person has against the ABO blood group antigens. These antigens are found on the surface of red blood cells and determine a person’s blood type (A, B, AB, or O).
Preparation for the Test
There is no specific preparation needed for the ABO isoheamagglutinin titre (IHA) test. However, it is important to inform the healthcare provider if the person being tested is taking any medications that may affect the immune system, as these medications can affect the results of the test.
Sample Requirements
The ABO isoheamagglutinin titre (IHA) test typically requires a blood sample. The sample may be drawn from a vein in the arm or from a fingerstick.
Additional Notes
The results of the ABO isoheamagglutinin titre (IHA) test must be interpreted by a healthcare provider in the context of the person’s medical history and other laboratory tests. It is also important to note that the presence of antibodies against the ABO blood group antigens does not necessarily mean that a person will have a transfusion reaction or other adverse reaction to transfused blood. The risk of adverse reactions depends on several factors, including the level of antibodies present and the type of blood product being transfused.
