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Published on: October 24, 2018
Evolution of Carboxyhemoglobin in Children Supported by Extracorporeal Membrane Oxygenation: An Observational
Orlane Brohan1, Jean-Michel Liet1, Thomas Dejoie2
1From the Service Réanimation Pédiatrique, CHU Nantes, Nantes Université, Réanimation Pédiatrique, Nantes, France.
Insights
Carboxyhemoglobin (COHb) levels increase during extracorporeal membrane oxygenation (ECMO) in children. Higher COHb levels can predict ECMO circuit complications, aiding early intervention.
Area of Science:
- Pediatric critical care medicine
- Cardiopulmonary support
- Biomarker research
Background:
- Carboxyhemoglobin (COHb) is a potential marker for hemolysis and circuit complications during extracorporeal membrane oxygenation (ECMO).
- Limited data exists on COHb levels in pediatric patients undergoing ECMO.
Purpose of the Study:
- To investigate COHb levels in children receiving ECMO.
- To determine if COHb can predict ECMO circuit-related complications in pediatric patients.
Main Methods:
- Observational, single-center study from January 2018 to December 2021.
- Included 58 children undergoing ECMO.
- Measured COHb levels via blood gas analysis before, during, and after ECMO support.
Main Results:
- COHb levels increased from the 6th hour of ECMO support and remained elevated during and shortly after ECMO.
- Children experiencing circuit complications showed a significant decrease in COHb levels within 24 hours post-circuit change.
- Maximal daily COHb levels predicted circuit complications with an ROC curve area of 0.85.
Conclusions:
- COHb is a potential indicator of hemolysis and circuit-related complications in pediatric ECMO.
- Monitoring COHb levels may aid in the early detection and management of ECMO complications in children.
Abstract:
Carboxyhemoglobin (COHb) is potentially a novel marker of hemolysis on extracorporeal membrane oxygenation (ECMO) and may be useful as an indicator for circuit-related complication in adults, but little is known about COHb levels in children. An observational single-center study was performed between January 2018 and December 2021. Fifty-eight children were included and COHb levels were obtained along with routine blood gas analysis before, during, and after ECMO support. From the 6th hour of ECMO support, the COHb level increased relative to the pre-ECMO level, with an adjusted mean difference of 0.44 (95% confidence interval [CI], 0.26-0.62; p < 0.001) and remained higher during ECMO run and within 6 hours after weaning ( p < 0.001). Among the 18 children (31%) who experienced at least one circuit-related complication leading to a circuit change, we observed a significant decrease in COHb levels within 24 hours after the circuit change, compared with the 24 hours before (adjusted mean difference, 0.54%; 95% CI, 0.27-0.80; p < 0.001). The maximal daily COHb level was able to predict circuit-related complications within 24 hours following COHb measurement with an area under the receiver operating characteristic (ROC) curve of 0.85 (95% CI, 0.77-0.92; p < 0.001).
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