Eficácia da pré-oxigenação usando respiração em volume corrente: uma comparação dos sistemas Mapleson A, Bain e Circular

With spontaneous normal tidal volume breathing at oxygen flow rate of 5 L.min−1, Mapleson A can optimally preoxygenate patients within 3 min while Bain's and Circle system require more time. However at O2 flow rate of 10 L.min−1 all the three breathing systems are capable of optimally preoxygenating the patients in less than 3 min.