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Content: Pulse ox was invented in the 1970s and is now widely used and accepted in clinical care; it is often thought to be a basic vital sign. Why
is pulse ox used to screen for CHD? Pulse ox can help to identify infants with critical CHD that may have low levels of oxygen in their blood. Pulse ox screening may help diagnose critical CHD before an infant becomes sick. Who
should be screened? All infants should be screened. When
should screening be performed? Pulse ox screening should be performed before discharge from the nursery, after the infant turns 24 hours of age. If the infant was born prematurely, screening should be performed when medically appropriate.