气管插管和喉罩通气对部分CO_2重吸入法测心排血量值的影响

The Effect of LMA and Tracheal Intubation on Measurement of Cardiac Output, Partial CO_2 Rebreathing (RBCO) versus Thoracic Bioimpendence(ICco)

目的 :比较气管插管和喉罩插管两种通气方式对部分CO2 重吸入法测心排血量值的影响。方法 :2 2例烧伤面积小于5 % ,行择期清创植皮术患者 ,随机分为气管插管组和喉罩插管组。所有患者入室后接胸阻抗监测仪 ,常规麻醉诱导后行部分CO2 重吸入测心排血量。分别于麻醉诱导后、手术开始时、手术 4 5min时间点记录相应的心排血量值。结果 :两组患者组内呼出末CO2 心排血量值 (RBCO)与胸阻抗心排血量值 (ICCO)相比 ,前者均略高于后者 ,但组内数据变化趋势基本相似 ,且组内两者之间的相关性检验在各时间点均有显著意义。组间比较显示气管插管组T -ICCO与喉罩组L -ICCO之间均无显著差异。虽然气管插管组的RBCO值较喉罩组略高 ,但两组间比较仍无显著差异。结论 :两种通气方式 (气管插管和喉罩 )对部分CO2

Objective: To compare the effect of LMA and tracheal intubation on measurement of cardiac output, partial CO 2 rebreathing (RBCO) versus thoracic bioimpendence (ICco). Methods: Twenty-two patients with burn injury (less than 5% BSA) were randomized to receive tracheal intubation or LMA(eleven each). Cardiac Output (CO) values at end of induction and incision, 45min after incision were recorded. Results: RBco was significantly higher than ICco in all patients, but with the trends were basically alike. The values of RBco were significantly associated with ICco. However, there are no significant difference between patients with LMA and tracheal intubation, whatever CO values were measuered through NICO 2 or TB. Conclusion:The CO values estimated through NICO 2 were similar between patients with LMA and tracheal intubation.