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Difficulty: MediumHealth Screening

A maternal-newborn registered nurse is preparing to conduct a routine Critical Congenital Heart Disease (CCHD) screening on a term infant. Arrange the following nursing actions in the correct chronological sequence according to standard evidence-based guidelines.

  1. 1Verify the newborn is at least 24 hours of age and in a calm, resting state.
  2. 2Apply pulse oximeter sensors to the newborn's right hand and either foot.
  3. 3Identify an initial oxygen saturation reading of 93% as an indeterminate result.
  4. 4Repeat the pulse oximetry measurements after a one-hour interval.
  5. 5Report consecutive indeterminate findings to the provider to prepare for an echocardiogram.

Answer

The correct sequence begins with verifying the infant's age, followed by applying the sensors, interpreting the initial indeterminate result, repeating the screen after one hour, and finally notifying the provider if the screen is ultimately failed.
The standard sequence for CCHD screening requires the nurse to first ensure the newborn is physiologically ready (at least 24 hours old). The nurse then measures pre- and post-ductal saturations. When interpreting the data, an indeterminate result (90-94%) necessitates algorithmic follow-up, specifically a one-hour wait before repeating the test. Provider notification for a diagnostic echocardiogram only occurs after consecutive failed or indeterminate screens.

Step-by-Step Solution

1
Verify the infant is 24 hours old and calm.
Ensures the timing is appropriate for accurate testing.
Screening before 24 hours increases false positives due to normal transitional circulation and incomplete closure of the ductus arteriosus.
2
Apply pre-ductal and post-ductal sensors.
Obtains necessary oxygen saturation data.
Comparing the right hand (pre-ductal) and foot (post-ductal) detects right-to-left shunting common in critical congenital heart defects.
3
Interpret the 93% saturation result.
Classifies the screen as an indeterminate finding.
A passing score is 95% or greater; an immediate fail is strictly less than 90%. Readings of 90-94% require further observation.
4
Wait one hour and repeat the measurement.
Follows the algorithmic protocol for borderline results.
Many healthy infants will resolve mild physiological desaturation within an hour. Repeating the test prevents unnecessary diagnostic imaging.
5
Notify the provider of the failed screening.
Escalates care to the primary pediatric provider.
Persistent indeterminate results (three total screens) require diagnostic imaging via echocardiogram to rule out structural heart defects.

Key Concept

Newborn Critical Congenital Heart Disease (CCHD) Screening Protocol
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Topics

Health Screening

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