Description
Why It’s Done:
• To screen for cystic fibrosis: The primary purpose of the IRT test is to screen newborns for cystic fibrosis (CF), a genetic condition that affects the lungs, pancreas, liver, and intestines. CF is caused by mutations in the CFTR gene, which leads to thick, sticky mucus production that can cause severe respiratory and digestive problems.
• Early detection of cystic fibrosis: Early detection through neonatal screening allows for early intervention and management of CF, improving the child’s long-term health and quality of life. This may include treatments to manage symptoms, improve lung function, and prevent malnutrition.
• To identify at-risk infants: Elevated IRT levels are an important early indicator that an infant may have cystic fibrosis. However, an elevated IRT level alone does not confirm the diagnosis of CF. If IRT levels are high, additional tests, such as sweat chloride tests or genetic testing, are required for confirmation.
• To reduce the risk of complications: Newborn screening for CF helps detect the condition before symptoms develop, allowing healthcare providers to initiate treatments early. Early intervention can reduce the risk of respiratory infections, digestive complications, and other severe health issues related to cystic fibrosis.
Preparation:
• Fasting: Fasting is not required for the IRT test as it is a blood test taken shortly after birth.
• Blood sample: A heel prick (blood spot sample) is taken from the newborn within the first 48-72 hours of life, typically as part of routine newborn screening in many countries.
• No special preparation: There is generally no need for special preparation for the test. However, it is important to ensure that the test is done as early as possible within the recommended time frame for accurate screening.
