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A chest radiograph scoring system to predict chronic oxygen dependency in low birth weight infants
I Maconochie1, A Greenough, B Yuksel
1Department of Child Health, King's College Hospital, London, U.K.
Insights
A chest radiograph scoring system effectively predicts chronic oxygen dependency in preterm infants. A score above 6 indicates a high likelihood of long-term oxygen needs, aiding clinical decisions.
Area of Science:
- Neonatal Medicine
- Pediatric Radiology
- Respiratory Medicine
Background:
- Chronic oxygen dependency is a significant concern in preterm infants.
- Predictive tools are needed to identify infants at risk for long-term respiratory support.
- Chest radiography is a common imaging modality in neonates.
Purpose of the Study:
- To evaluate the utility of a chest radiograph scoring system in predicting chronic oxygen dependency at 36 weeks post-conceptual age.
- To determine the sensitivity and specificity of the scoring system.
Main Methods:
- A scoring system was developed to assess chest radiographs of preterm infants at one month of age.
- Radiographs were graded based on lung volume, opacification, cystic changes, and interstitial changes (max score 24).
- The study included 40 preterm infants (median gestational age 27 weeks).
Main Results:
- Infants with chronic oxygen dependency had significantly higher radiograph scores (median 9) compared to those not dependent (median 3).
- All chronically oxygen-dependent infants (9/9) had a score > 6.
- A score of 6 demonstrated 100% sensitivity and 93.5% specificity for predicting chronic oxygen dependency.
Conclusions:
- The chest radiograph scoring system is a valuable tool for predicting chronic oxygen dependency in preterm infants.
- A threshold score of 6 on this system accurately identifies infants likely to require long-term oxygen support.
- This predictive capability can inform early clinical management and resource allocation for at-risk neonates.
Abstract:
The usefulness of a chest radiograph scoring system to predict chronic oxygen dependency (oxygen dependency at 36 weeks post conceptual age) was determined in 40 infants with a median gestational age 27 weeks (range 24-32 weeks). The scoring system assessed the appearance of the preterm infant's chest radiograph taken at one month of age, and graded the radiograph according to lung volume, the presence of opacification, cystic elements and interstitial change (maximum score 24). Infants who were chronically oxygen dependent had significantly higher scores (median 9, range 7-20) than those not oxygen dependent (median 3, range 0-13, P less than 0.01). All nine chronically oxygen dependent infants had a score greater than 6, in comparison with only two of 31 infants not chronically oxygen dependent (P less than 0.01). A chest radiograph score of 6 thus had a sensitivity of 100% and specificity of 93.5% in predicting chronic oxygen dependency.