What specimens are used for newborn screening?

What specimens are used for newborn screening?

• A. Urine, whole blood
• B. Saliva
• C. Blood only
• D. Urine only

Answer: (A)

Newborn screening relies on using specimens that reliably reveal metabolic and genetic conditions early. Whole blood, usually collected from a heel prick and placed on filter paper as dried blood spots, is the standard because it works well with high-throughput tests (like tandem mass spectrometry) to detect many disorders. Urine is also collected in many programs to screen for additional metabolic abnormalities and to help confirm or supplement findings, widening the range of conditions that can be detected soon after birth. Saliva isn’t routinely used for standard newborn screening, and relying on urine alone would miss many blood-borne markers. So using both urine and whole blood provides the broadest, most effective screening in newborns.

Newborn screening relies on using specimens that reliably reveal metabolic and genetic conditions early. Whole blood, usually collected from a heel prick and placed on filter paper as dried blood spots, is the standard because it works well with high-throughput tests (like tandem mass spectrometry) to detect many disorders. Urine is also collected in many programs to screen for additional metabolic abnormalities and to help confirm or supplement findings, widening the range of conditions that can be detected soon after birth. Saliva isn’t routinely used for standard newborn screening, and relying on urine alone would miss many blood-borne markers. So using both urine and whole blood provides the broadest, most effective screening in newborns.