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Cerebral hemoglobin oxygenation in children with congenital heart disease
Kazuya Terada1, Shinji Nakamura2, Yasuhiro Nakao2
1Division of Pediatric Cardiology, Shikoku Medical Center for Children and Adults, Kagawa, Japan.
Insights
Regional oxygen saturation index (rSO2) can assess brain oxygenation in children with congenital heart disease (CHD). However, interpreting rSO2 requires understanding the specific cardiac pathology, particularly after single-ventricle surgery.
Area of Science:
- Pediatric Cardiology
- Neurocritical Care
- Medical Technology
Background:
- Congenital heart disease (CHD) poses risks for neurodevelopmental impairments due to altered cerebral circulation and oxygen metabolism.
- Bedside monitoring of brain regional oxygen saturation index (rSO2) using near-infrared spectroscopy is increasingly used in pediatric CHD management.
Purpose of the Study:
- To evaluate the predictive value of rSO2 for cerebral oxygen metabolism in children with CHD.
- To investigate the influence of clinical variables on the correlation between rSO2 and reference oxygen saturation values.
Main Methods:
- Studied 186 children with CHD undergoing cardiac catheterization.
- Assessed the correlation between rSO2 and reference SjvO2/SaO2 ratios (0.75:0.25, 0.66:0.34, 0.50:0.50) before and after surgery.
- Analyzed data across different patient groups: double ventricle (pre/post-surgery) and single ventricle (pre-surgery).
Main Results:
- Significant correlations between rSO2 and reference values were found in double ventricle (pre/post-surgery) and single ventricle (pre-surgery) groups across all tested ratios.
- No significant relationship was observed between rSO2 and reference values in the single ventricle post-surgery group.
Conclusions:
- Regional oxygen saturation index (rSO2) is a valuable tool for assessing cerebral oxygenation in pediatric CHD patients.
- Accurate interpretation of rSO2 necessitates consideration of the specific cardiac pathology, especially in post-operative single-ventricle physiology.
Background:
It is important to identify the pathological characteristics of cerebral circulation and oxygen metabolism at the bedside in children with congenital heart disease (CHD) to prevent neurodevelopmental impairments. The brain regional oxygen saturation index (rSO2 ) can be easily obtained at the bedside with near-infrared spectroscopy and has been widely used in the management of children with CHD in recent years.
Methods:
To determine if the rSO2 before or after CHD surgery is a good predictor of cerebral oxygen metabolism, we investigated the impact of different clinical variables on the correlation between rSO2 and reference values under steady ratios of hemoglobin oxygen saturation in the internal jugular vein (SjvO2 ) or femoral artery (SaO2 ) (0.75:0.25, 0.66:0.34, and 0.50:0.50) in 186 children with CHD undergoing cardiac catheterization.
Results:
In three patient groups-double ventricles before surgery, double ventricles after surgery, and single ventricle before surgery-there were significant relationships between rSO2 and the reference values of SO2 under all three steady ratios of SjvO2 and SaO2 . No relationship with the reference values was found for the single ventricle after surgery group.
Conclusions:
Regional oxygen saturation index is useful for assessing cerebral oxygenation in children with CHD, but knowledge of the underlying cardiac pathology in CHD, especially in the case of a single ventricle after surgery, is important for the correct interpretation of rSO2 measurements obtained using near-infrared spectroscopy.
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