Perioperatively Inhaled Hydrogen Gas Diminishes Neurologic Injury Following Experimental Circulatory Arrest in Swine
Alexis R Cole, Dorothy A Perry, Ali Raza, Arthur P Nedder, Elizabeth Pollack, William L Regan, Sarah J Bosch, Brian D Polizzotti, Edward Yang, Daniel Davila, Onur Afacan, Simon K Warfield, Yangming Ou, Brenda Sefton, Allen D Everett, Jeffrey J Neil, Hart G Lidov, John E Mayer, John N Kheir
Highlights • Inhaled hydrogen gas has been shown to temper the sequelae of ischemic insults. Its application in cardiopulmonary bypass has not been investigated. • Neonatal swine were cannulated to cardiopulmonary bypass and exposed to prolonged circulatory arrest (75 min at 25°C). Swine were randomized to treatment with or without inhaled 2.4% hydrogen gas mixtures for 24 h during and following ischemic injury. Hydrogen-treated swine exhibited significantly less severe brain injury than controls, as quantified by clinical examination, serology, magnetic resonance-graded volume of injury, and histopathology. Hydrogen treatment also decreased renal injury. • The administration of inhaled 2.4% hydrogen gas mixtures through a standard ventilator and anesthesia machine were safe, even in the setting of electrocautery.
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