密闭式吸痰管对机械通气婴幼儿呼气末二氧化碳分压的影响

Influence of the closed suction tube on mechanical ventilation of infants＇ end expiratory PETCO2

目的探讨密闭式吸痰管对机械通气体质量≤10kg的婴幼儿呼气末二氧化碳分压（PETCO2）的影响。方法选择应用经鼻气管插管机械通气的患儿78例，呼吸机参数维持不变，应用密闭式吸痰管；应用前后持续监测PETCO2 2h；每10分钟记录1次生命体征及PETCO2值，比较生命体征及PETCO2的变化。结果应用密闭式吸痰管前后，患儿体温、心率、呼吸、收缩压、舒张压、血氧饱和度稳定；应用密闭式吸痰管60rain后，患儿PETCO：（41．96±10．90）mmHg，较应用前增加，差异有统计学意义（t=-2．914，P〈0．05）。结论机械通气体质量≤10妇的婴幼儿，长时间应用会使患儿的PETCO2增加。

Objective To explore the influence of closed suction tube on end-tidal carbon dioxide partial pressure （PETCO2） in infants with mechanical ventilation mass ≤10 kg. Methods The study investigated 78 infants with mechanical ventilation of nasal trachea cannula and the closed suction tube was used with constant respirator parameters. Since PETCO2 was continuously monitored for 2 hours before and after the use of closed suction tube, the vital signs and PETCO2 were recorded at every 10 minutes. Results The body temperature, heart rate, breath, systolic pressure, diastolic pressure, and oxygen saturation remained stable before and after the use,of closed suction tube. After 60 minutes of using closed suction tube, PETCO2 increased to （41.96±10.90）mmHg （t = -2. 914,P 〈0. 05）. Conclusions PETCO2 is likely to increase after using closed suction tube for a long time in infants with mechanical ventilation mass ≤ 10 kg.