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目的探讨3种不同呼吸机湿化管道系统对人工呼吸道机械通气患儿的湿化效果。方法收集建立人工呼吸道机械通气48 h以上患儿60例,随机分为A组、B组、C组,每组20例。A组使用MR410型(吸气与呼气管路均无加热丝)湿化管道系统;B组使用MR730型(吸气管路带加热丝而呼气管路无加热丝)湿化管道系统;C组采用MR850型(密闭式一次性、双加热式自动加水、加湿)湿化管道系统。3组湿化液均使用灭菌注射用水。对3组呼吸道分泌物黏稠度、管道痰痂形成及呼吸道痉挛情况进行比较。结果 3组患儿呼吸道分泌物黏稠度、管道痰痂形成、呼吸道痉挛比较差异均有统计学意义(Pa<0.05),C组无管道痰痂形成,亦无呼吸道痉挛发生。结论机械通气患儿呼吸道湿化效果与呼吸机管道湿化系统的管道是否有加热丝有关,加热湿化系统管道有利于改善呼吸道湿化效果。
Objective To investigate the humidification effects of three different ventilator humidification ducts on children with artificial ventilation. Methods Sixty children with mechanical ventilation over 48 h were collected and randomly divided into group A, group B and group C, with 20 in each group. Group A used MR410 wet pipe system with no heating wire between inspiratory and expiratory circuits; Group B used MR730 wet pipe system with inspiratory pipe with heating wire and exhalation pipe without heating wire; Group C uses MR850 (closed one-time, double-heated automatic watering and humidifying) wet pipe system. 3 groups of wetting fluid are used sterile water for injection. Three groups of respiratory secretions viscosity, sputum scab formation and respiratory spasm were compared. Results There were significant differences in respiratory secretions viscosity, phlegm trachea formation and respiratory spasm between the three groups (P <0.05). No sputum callus formation was found in group C, and no respiratory spasm was found. Conclusion Respiratory wetness in children with mechanical ventilation is related to the presence or absence of heating wire in the pipe of humidification system in ventilator. Heating the pipe of humidification system is helpful to improve the humidification effect of the respiratory tract.