Which test is used to check newborns for critical congenital heart disease (CCHD)?

Pulse oximetry is the test used to check newborns for critical congenital heart disease (CCHD). This non-invasive screening method measures the oxygen saturation levels in a baby's blood. By placing a small sensor on the baby's skin, usually on a hand and foot, healthcare providers can quickly assess whether the oxygen saturation levels are within a normal range.

If a newborn is suspected of having CCHD, they may show lower oxygen levels in comparison to healthy infants. Normal oxygen saturation is generally expected to be above 95%, and significant discrepancies between the readings from the hand and foot could indicate a potential heart defect. Therefore, pulse oximetry is a valuable and effective initial screening tool for early detection of CCHD, allowing for timely intervention if necessary.

Other options like echocardiograms, electrocardiograms, and chest X-rays may provide further information regarding heart function or structure but are not standard primary screening tools for CCHD in newborns. These tests are typically used for diagnosis after screening has indicated a potential issue.