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作者给10kg以下婴儿在应用喉罩(LMA)控制通气期间检测PaCO_2和P_(ET)CO_2并与使用气管导管(ETT)者进行比较。 作者选择12例1～13个月的患儿(ASAⅠ～Ⅱ级),无心肺或气道解剖异常、无误吸危险者。吸入70％N_2O-30％O_2-氟烷,达一定麻醉深度时纳入大小合适的LMA,以潮气量8～10ml·kg~(-1)进行机械通气,气流量为6L·min~(-1),气道峰压不大于2kpa,P_(ET)CO_2至少稳定5min后取动脉血标本备查。然后取出LMA,改插ETT,再重新测定上述变量,同时注意P_(ET)CO_2变化,此期间保持血流动力学及麻醉深度稳定,不作任何手术操作。
The authors tested PaCO 2 and P_ (ET) CO_2 during LMA controlled ventilation in infants up to 10 kg compared to those using endotracheal tube (ETT). The authors selected 12 patients aged 1 to 13 months (ASA Ⅰ ~ Ⅱ grade), no heart or airway anatomy abnormalities, no risk of aspiration. Inhalation of 70% N 2 O-30% O 2 -fluoroalkane into appropriate LMA at a certain depth of anesthesia, mechanical ventilation with a tidal volume of 8 ~ 10ml · kg -1, air flow of 6L · min -1 ), Peak airway pressure is not more than 2kpa, P_ (ET) CO_2 at least stable 5min after taking blood samples for future reference. Then remove the LMA, ETT inserted again, and then re-measured the above variables, while paying attention to P_ (ET) CO_2 changes during this period to maintain hemodynamics and depth of anesthesia, without any surgery.