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Newborn Screen Collection

Ordering Info & Methodology

Test Code

Cerner Synonyms


NBS Repeat Screen, Newborn Screening, PKU screen, Neonatal Screen, Phenylalanine Ketone Urea Screen, Blood Spot Screen, Blood Dot Screen, NBS, Newborn Metabolic Screen

Turn Around Time


Ordering Guide

Specimen Requirements

Sample Type

Collection Container

Alternate Collection Containers

Whole Blood. Capillary collections preferred. Arterial and venous samples acceptable.

Whatman 903 NBS card (Newborn Screen card, Blood Dot Card)

Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.

Minimum Volume

Add On Stability

Collection and Shipping Requirements

Send on Transport Batch at room temperature. Do NOT use the pneumatic tube system to transport wet bloodspot cards. Wet bloodspot cards must NOT be packaged in biohazard bags.

Reference Intervals

Female Reference Interval

Age Category
Reference Interval

Male Reference Interval

Age Category
Reference Interval
Additional Notes

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Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.


Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.

Measurement Uncertainty

Optimal 4 dots, minimum 3 dots. Follow collection instructions on reverse of newborn screening card. Apply patient barcode to back of NBS card.

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