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目的 观察喉罩置入对婴幼儿呼吸循环的生理影响。方法 3 0例 ( 1～ 3 )岁、ASA( ～ )级的患儿随机分成两组 ,分别采用喉罩 ( n=15 ,L 组 )和气管插管 ( n=15 ,T组 )维持通气。分别于置入前 1、2、3分 ,置入即刻 ,置入后 1、2、3、4、5分记录患儿 Ppeak、DP、SP、PETCO2 等数值 ,并描计 P/VL oop图表。结果 两组置入前 Ppeak、DP、SP、PETCO2 无明显差别 ,置入即刻与置入后 1、2分 ,T组SP、DP、Ppeak均明显高于 L 组 ,而 L 组 PETCO2 明显高于 T组。结论 喉罩置入较气管插管反应轻微 ,气道阻力小 ,但鉴于 PETCO2 明显升高 ,建议婴幼儿使用喉罩进行辅助呼吸时 ,宜进行气体监测 ,以免 CO2 蓄积
Objective To observe the physiological effects of laryngeal mask placement on respiratory cycle in infants and young children. Methods Thirty (1--3) years old children with ASA (~) were randomly divided into two groups. Ventilation was maintained with laryngeal mask (n = 15, group L) and intubation (n = 15, group T) . Porsion, DP, SP, PETCO2 and other values were recorded at 1, 2 and 3 minutes before implantation, immediately after implantation, 1,2,3,4 and 5 minutes after implantation, and P / VL oop chart . Results There was no significant difference in Ppeak, DP, SP and PETCO2 between the two groups immediately after implantation, and the scores of SP, DP and Ppeak in group T were significantly higher than those in group L T group. Conclusions The laryngeal mask has a lower response to tracheal intubation and lower airway resistance. However, in view of the significant increase of PETCO2, it is suggested that gas monitoring should be carried out to prevent CO2 accumulation when infants and children use laryngeal mask for assisted breathing