How to test for ABO hemolytic disease

ABO hemolytic testing typically involves several steps: 1. Blood Typing: Blood samples from both the mother and the fetus are collected to determine their ABO blood types, identifying any potential blood type incompatibility. 2. Antibody Screening: The mother's serum is tested for antibodies to assess her immune response against the fetal red blood cells, usually using methods such as agglutination tests or ELISA. 3. Free Antibody Detection: To confirm whether the mother has free antibodies not yet bound to fetal red blood cells, a free antibody test is performed. 4. Red Blood Cell Fragility Test: If hemolysis in the newborn is suspected, a red blood cell fragility test may be conducted to evaluate the fragility of the red blood cells. 5. Neonatal Hemolytic Disease Screening: Blood samples from the newborn’s umbilical cord or collected within the first few days after birth are analyzed for bilirubin levels and related antibodies, enabling early detection and prevention of neonatal hemolytic disease. All these tests require fasting to ensure accurate results. If there are concerns or related symptoms, it is recommended to seek medical attention promptly for a thorough evaluation.