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Retinopathy of prematurity. Diagnosis, severity, and natural history
Insights
Constant monitoring of oxygen therapy in premature infants showed that retinopathy of prematurity (ROP) developed in over half of infants. Lower birth weight was linked to earlier ROP diagnosis and increased severity.
Area of Science:
- Neonatal care
- Ophthalmology
- Clinical trials
Background:
- Retinopathy of prematurity (ROP) is a significant cause of visual impairment in premature infants.
- Oxygen therapy is a critical intervention but can be associated with ROP development.
- Understanding the natural history and risk factors for ROP is crucial for effective management.
Purpose of the Study:
- To investigate the impact of constant oxygen therapy monitoring on the diagnosis, severity, and natural history of retinopathy of prematurity (ROP).
- To analyze the relationship between infant birthweight, oxygen therapy duration, and ROP development and severity.
Main Methods:
- Prospective clinical trial involving 214 infants with birthweights <= 1300 g.
- Constant monitoring of oxygen therapy and assessment of ROP diagnosis and severity using a severity index (SI).
- Tracking ROP onset, duration, regression, and cicatricial progression.
Main Results:
- ROP developed in 55.6% of infants; cicatricial ROP occurred in 7.6%.
- Earlier ROP diagnosis was observed in infants with lower birthweights (<900 g) compared to those between 900-1300 g.
- ROP duration averaged 15 weeks for infants with disease regression.
- ROP severity (SI) strongly correlated with birthweight and weakly with total oxygen therapy duration.
Conclusions:
- Constant oxygen monitoring provides data on ROP incidence and natural history in high-risk premature infants.
- Birthweight is a key determinant of ROP onset timing and disease severity.
- While oxygen therapy duration showed a weak correlation, birthweight is a stronger predictor of ROP severity.
Abstract:
This article presents data gathered in a prospective clinical trial of constant monitoring of oxygen therapy on the diagnosis, severity (as coded by a severity index [SI]) and natural history of retinopathy of prematurity (ROP) in 214 surviving infants with birthweights less than or equal to 1300 g. ROP developed in 119 (55.6%) infants and, of these, cicatricial ROP developed in nine (7.6%). The disease was diagnosed at 8-9 weeks on the average in infants with birthweights less than 900 g and 4-5 weeks in infants 900 to 1300 g. Those infants in whom the disease regressed, ROP lasted approximately 15 weeks. The severity of the disease, as defined by the SI, was strongly correlated with the birthweight of the infant and weakly correlated with the total duration of oxygen therapy.