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Postoperative Cerebral Oxygen Saturation in Children After Congenital Cardiac Surgery and Long-Term Total
Giorgia Carra1, Marine Flechet, An Jacobs
1All authors: Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, UZ Leuven and KU Leuven, Leuven, Belgium.
Insights
Reduced cerebral oxygen saturation and desaturation in children after heart surgery are linked to lower IQ scores two years later. Monitoring these levels post-PICU admission is crucial for long-term neurocognitive outcomes.
Area of Science:
- Pediatric Cardiology
- Neuroscience
- Critical Care Medicine
Background:
- Children with congenital heart disease face risks of inadequate cerebral perfusion post-surgery.
- Cerebral tissue oxygen saturation monitoring using near-infrared spectroscopy is a noninvasive tool.
- Long-term neurocognitive consequences are a concern in this patient population.
Purpose of the Study:
- To investigate the association between early postoperative cerebral tissue oxygen saturation and neurocognitive outcomes.
- To determine if reduced oxygen saturation or increased desaturation events impact intelligence quotient (IQ) at 2-year follow-up.
- To evaluate the independent contribution of these perfusion parameters to long-term neurodevelopment.
Main Methods:
- Prospective, single-center study involving pediatric patients after congenital heart disease surgery.
- Noninvasive near-infrared spectroscopy used for monitoring cerebral tissue oxygen saturation in the early postoperative period (first 12 and 24 hours).
- Bayesian linear regression analysis employed to assess the independent association between cerebral oxygenation parameters and 2-year total IQ scores, adjusting for confounders.
Main Results:
- Reduced mean cerebral tissue oxygen saturation in the first 12 hours postoperatively was associated with a loss of IQ points at 2 years (90% probability).
- Increased intensity and duration of desaturation events (cerebral tissue oxygen saturation < 65%) also independently predicted lower IQ scores at 2-year follow-up (90% probability).
- These findings highlight the independent impact of both mean saturation and desaturation on neurocognitive development.
Conclusions:
- Lower mean cerebral tissue oxygen saturation and higher doses of desaturation in the early postoperative period are independent predictors of reduced total intelligence quotient.
- These findings underscore the importance of optimizing cerebral oxygenation in pediatric patients following congenital heart surgery.
- Continuous monitoring of cerebral perfusion is vital for identifying at-risk children and potentially mitigating long-term neurocognitive deficits.
Objectives:
During the early postoperative period, children with congenital heart disease can suffer from inadequate cerebral perfusion, with possible long-term neurocognitive consequences. Cerebral tissue oxygen saturation can be monitored noninvasively with near-infrared spectroscopy. In this prospective study, we hypothesized that reduced cerebral tissue oxygen saturation and increased intensity and duration of desaturation (defined as cerebral tissue oxygen saturation < 65%) during the early postoperative period, independently increase the probability of reduced total intelligence quotient, 2 years after admission to a PICU.
Design:
Single-center, prospective study, performed between 2012 and 2015.
Setting:
The PICU of the University Hospitals Leuven, Belgium.
Patients:
The study included pediatric patients after surgery for congenital heart disease admitted to the PICU.
Interventions:
None.
Measurements And Main Results:
Postoperative cerebral perfusion was characterized with the mean cerebral tissue oxygen saturation and dose of desaturation of the first 12 and 24 hours of cerebral tissue oxygen saturation monitoring. The independent association of postoperative mean cerebral tissue oxygen saturation and dose of desaturation with total intelligence quotient at 2-year follow-up was evaluated with a Bayesian linear regression model adjusted for known confounders. According to a noninformative prior, reduced mean cerebral tissue oxygen saturation during the first 12 hours of monitoring results in a loss of intelligence quotient points at 2 years, with a 90% probability (posterior β estimates [80% credible interval], 0.23 [0.04-0.41]). Similarly, increased dose of cerebral tissue oxygen saturation desaturation would result in a loss of intelligence quotient points at 2 years with a 90% probability (posterior β estimates [80% credible interval], -0.009 [-0.016 to -0.001]).
Conclusions:
Increased dose of cerebral tissue oxygen saturation desaturation and reduced mean cerebral tissue oxygen saturation during the early postoperative period independently increase the probability of having a lower total intelligence quotient, 2 years after PICU admission.
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