Bain回路の小児麻酔への使用経験ならびにDundas回路との臨床的な比較検討

概要

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In clinical pediatric anesthesia, the authors compared the Bain's circuit with the Dundas' circuit, under manual controlled ventilation with the fresh gas flow of 31/min by means of blood gas study. The following results were obtained. 1. On the Bain's circuit, normal arterial carbon dioxide tension (Paco2) could be obtained. But on the Dundas'circuit, lower Paco2 was obtained and the respiratory alkalosis developed. 2. On the Bain's circuit, direct linear correlation was recognized between Paco2 and body weight, but on the Dundas'circuit such correlation was not recognized. 3. On the Bain's circuit, moderate increase of CO2 washout was observed in the patients weighing less than 10 kg body weight, therefore we presumed that the fresh gas flow might be reduced further in the children under 10 kg body weight. 4. In regard to oxygenation, between two circuits we could not found statistically significant difference. From above results, the authors concluded that the fresh gas flow of 31/min was sufficient to guarantee the adequate CO2 washout from the body with the Bain's circuit in children, but the same fresh gas flow to Dundas' circuit caused the respiratory alkalosis.
学校法人昭和大学・昭和医学会の論文