Article Dans Une Revue PLoS ONE Année : 2025

Assessment of arterial whole blood redox potential during cardiopulmonary bypass

Pierre Gros

Résumé

Imbalance in the redox equilibrium is common in any type of aggression. Cardiopulmonary bypass (CPB) initiation induces metabolic perturbations, and reliable biological monitoring tools for this condition are currently limited (e.g., lactate/pyruvate ratio). The measurement of arterial whole blood redox potential (E redox ) provides a systemic assessment of the redox state and may serve as a valuable marker for detecting metabolic perturbations during CPB. In this prospective exploratory study involving patients undergoing cardiac surgery, we investigated variations in E redox and lactate/pyruvate ratio during CPB initiation. Using a prospective exploratory study design, we assessed the changes in E redox and relevant variables during the initiation of CPB in 16 cardiac surgery patients. Upon initiation of CPB we observed a significant decrease in arterial whole blood redox potential (101.90 mV + /- 11.52 vs. 41.80 mV + /- 10,26; p < 0.0001). Concomitantly, the lactate/pyruvate ratio significantly increased (12.81 + /- 0.90 vs 67.1 + /- 7.94; p < 0.0001) while the acetoacetate/β-hydroxybutyrate ratio significantly decreased (1.11 + /- 0.19 vs. 0.54 + /- 0.05 at 0 min; p = 0.0055). The circulatory failure indicated by changes in the lactate/pyruvate ratio and ketone bodies at the initiation of CPB correlated with a significant reduction in E redox. Arterial E redox is a novel variable that holds promise in the detection and monitoring of metabolic aggression during CPB. Its assessment during CPB initiation could provide valuable insights into the patient’s circulatory status, as the E redox appears to be more sensitive than lactate for monitoring circulatory insufficiency.

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hal-05528604 , version 1 (26-02-2026)

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Vincent Pey, Marion Stephan, Pierre Gros, Cédric Dray, Fanny Bounes, et al.. Assessment of arterial whole blood redox potential during cardiopulmonary bypass. PLoS ONE, 2025, 20 (5), pp.e0324437. ⟨10.1371/journal.pone.0324437⟩. ⟨hal-05528604⟩
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