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Related Experiment Videos

Newborn screening--is it really that simple?

Veronica Wiley1, Kevin Carpenter, Ursula Bayliss

  • 1The Children's Hospital at Westmead, Sydney, NSW, Australia.

The Southeast Asian Journal of Tropical Medicine and Public Health
|May 24, 2005
PubMed
Summary

Tandem mass spectrometry (MSMS) enhances newborn screening by detecting amino acid and acyl carnitine disorders. This method improves diagnostic capabilities and early treatment initiation for numerous congenital conditions.

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Area of Science:

  • Biochemistry
  • Medical Diagnostics
  • Public Health

Background:

  • Newborn screening programs are crucial for early detection of congenital disorders.
  • Tandem mass spectrometry (MSMS) offers advanced capabilities for analyzing metabolites in newborns.
  • Implementing new screening technologies requires rigorous reliability testing and validation.

Purpose of the Study:

  • To evaluate the incorporation and effectiveness of tandem mass spectrometry (MSMS) in the NSW Newborn Screening Program.
  • To assess the performance of MSMS in detecting disorders of amino acid metabolism and acyl carnitine deficiencies.
  • To determine the sensitivity, specificity, and positive predictive value of MSMS in a large-scale newborn screening context.

Main Methods:

  • Literature review for methodology and analyte selection.

Related Experiment Videos

  • Pilot screening using archival samples from confirmed cases.
  • Electrospray tandem mass spectrometry (MSMS) for analyzing amino acids and acyl carnitines in 320,848 newborns.
  • Algorithm reassessment for analyte concentrations and resample criteria.

    • Main Results:

    • Amino acid screening identified 73 infants with metabolic disorders, including 43 with persistent hyperphenylalaninemia (36 with PKU).
    • Acyl carnitine screening identified 44 infants with diagnosed disorders, including 15 with medium chain acyl CoA dehydrogenase deficiency.
    • MSMS demonstrated a sensitivity of 95.9%, specificity of 99.8%, and a positive predictive value of 18%, with a minimal cost increase of $A0.50 per baby.

    Conclusions:

    • Tandem mass spectrometry (MSMS) is a reliable and effective technology for expanding newborn screening.
    • The implementation led to the detection of 74 additional infants with treatable disorders, significantly improving early intervention outcomes.
    • Continuous reassessment of algorithms is vital for maximizing the performance of MSMS in newborn screening programs.