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目的评价儿童喉罩自主通气下呼气末二氧化碳分压(P_(ET)PaCO_2)和动脉血二氧化碳分压(PaCO_2)的一致性和相关性。方法择期行斜视矫正术的患儿32例全麻后实施保留自主呼吸喉罩通气;记录HR、RR、BP和SpO_2,分别在喉罩置入后10min(T1)、30min(T2)和1h(T3)记录P_(ET)PaCO_2和PaCO_2值,分析两者的相关性。结果各时点HR、BP、RR和SpO2差异均无统计学意义(P>0.05),PaCO_2均低于P_(ET)PaCO_2(P<0.05)。PaCO_2和P_(ET)PaCO_2呈正相关(T1、T2、T3时r值分别为0.72、0.81、0.93,P<0.05)。结论儿童全麻保留自主呼吸喉罩通气期,P_(ET)PaCO_2和PaCO_2值显著相关,P_(ET)PaCO_2高于PaCO_2。
Objective To evaluate the consistency and correlation of partial pressure of end-tidal carbon dioxide (P_ (ET) PaCO_2) and partial pressure of carbon dioxide (PaCO_2) in children with laryngeal mask spontaneous ventilation. Methods Thirty-two children undergoing elective strabismus surgery were performed general anesthesia with preserved spontaneous respiratory laryngeal mask ventilation. The HR, RR, BP and SpO_2 were recorded and recorded at 10 min (T1), 30 min (T2) and 1 h T3) recorded P_ (ET) PaCO_2 and PaCO_2 values, analysis of the correlation between the two. Results There were no significant differences in HR, BP, RR and SpO2 at all time points (P> 0.05), while PaCO_2 was lower than that of P (ET) PaCO_2 (P <0.05). There was a positive correlation between PaCO_2 and P_ (ET) PaCO_2 (r = 0.72,0.81,0.93, P <0.05) at T1, T2 and T3 respectively. Conclusion Childhood general anesthesia retains spontaneous breathing laryngeal mask ventilation, P_ (ET) PaCO_2 and PaCO_2 values were significantly correlated, P_ (ET) PaCO_2 higher than PaCO_2.