Accuracy of end-tidal carbon dioxide in reflecting arterial carbon dioxide during mechanical ventilation via laryngeal mask airway in children

VernacularTitle:呼气末二氧化碳分压反映患儿置入喉罩机械通气时动脉血二氧化碳分压的准确性
Author: Tao HONG ; Zhen SUN ; Weimin CHEN
Publication Type:Journal Article
Keywords: Carbon dioxide; Partial pressure; Laryngeal masks; Respiration; artificial
From: Chinese Journal of Anesthesiology 2011;31(5):586-587
CountryChina
Language:Chinese
Abstract: Objective To investigate the accuracy of end-tidal carbon dioxide (PETCO2) in reflecting arterial carbon dioxide (PaCO2) during mechanical ventilation via laryngeal mask airway (LMA) in children. Methods Fifty-two ASA Ⅰ patients, aged 2-9 yr, weighing 10-30 kg, undergoing orthopaedic surgery under general anesthesia, were randomized into 2 groups (n = 26 each) : LMA group and endotracheal tube (ETT) group. After anesthesia was induced with fentanyl, propofol and succinycholine, LMA or ETT was inserted and the children were mechanically ventilated. After the hemodynamics was stable, arterial blood samples were obtained to detect PaCO2, and PETCO2 was recorded simultaneously. Results There was no significant difference in PaCO2 and PCT CO, between groups LMA and ETT ( P ＞ 0.05) . There was no significant difference between PaCO2 and PETCO2 in LMA group (P ＞ 0.05). Conclusion When mechanical ventilation is performed via LMA in children, PETCO2 can reliably reflect PaCO2 and guide the regulation of ventilatory parameters.