Neonatal cystic fibrosis screeningFrom our partner site on breast cancer, MyBreastCancerNetwork.com.
Cystic fibrosis screening - neonatal; Immunoreactive trypsinogen; IRT test Normal Values: The predicted value of a normal or negative test is an immunoreactive trypsinogen value less than 140 ng/dL. advertisement Note: ng/dL = nanograms per deciliter What abnormal results mean: If your child's level of immunoreactive trypsinogen is greater than 140 ng/dL on the first screen, the test result is considered positive. If your child's level is 120 ng/dL on the second screen, the second test result is also considered positive. Although these two test results indicate CF may exist, a sweat test with a positive result is necessary to confirm the diagnosis. References: Gross, SD, Boyle, CA, Botkin, JR, et al. Newborn Screening for Cystic Fibrosis:Evaluation of Benefits and Risks and Recommendations for State Newborn Screening Programs. MMWR. 2004;53(RR13);1-36.
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