Clinical Report: The Role of Fetal Hemoglobin in the Oxygen Paradox of ROP
Overview
This report examines the association between fetal hemoglobin (HbF) levels and the risk of retinopathy of prematurity (ROP) in preterm infants. Lower HbF levels, particularly between 31 and 34 weeks postmenstrual age, are linked to increased incidence and severity of ROP, suggesting HbF as a modifiable risk factor.
Background
Retinopathy of prematurity (ROP) is a significant cause of childhood blindness in preterm infants, influenced by factors such as gestational age and oxygen exposure. Recent findings indicate that fetal hemoglobin (HbF) levels may play a crucial role in ROP risk, as the decline in HbF postnatally could affect retinal oxygen delivery. Understanding HbF's impact on ROP could lead to improved prevention strategies.
Data Highlights
Study
Findings
PacIFiHER group (2021)
Infants with HbF in the lowest tercile at 31 and 34 weeks PMA were 7.6 to 12.3 times more likely to be at risk for ROP.
Portuguese cohort (2025)
Increased RBC transfusions and reduced early HbF were observed in infants with ROP.
Key Findings
Lower HbF levels are associated with increased ROP incidence and severity.
HbF decline occurs rapidly in preterm infants, particularly influenced by adult donor red blood cell transfusions.
HbF's higher oxygen affinity may protect against hyperoxic injury in the retina.
Routine HbF monitoring could aid in risk stratification for ROP.
HbF stewardship may optimize transfusion practices and oxygen management in NICUs.
Clinical Implications
Monitoring HbF levels in preterm infants may provide valuable insights for risk stratification and management of ROP. Implementing HbF stewardship could enhance transfusion practices and oxygen titration, potentially reducing ROP incidence and severity.
Conclusion
The findings underscore the importance of fetal hemoglobin in the context of retinopathy of prematurity, suggesting that targeted interventions could mitigate ROP risk in vulnerable populations.
