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目的：比较常频常压喷射通气和高频喷射通气在支撑喉镜术中的通气效果。方法：选择３２例ＡＳＡⅠ～Ⅱ级声带息肉患者，拟行支撑喉镜术，随机均分为两组，每组１６例：高频组和常频组。结果：采用６０次／分的频率、１６０ｋＰａ压力进行通气，术中ＰａＣＯ２明显升高（Ｐ＜０．０１）并形成高碳酸血症；采用２２次／分的频率、１６０ｋＰａ的压力进行通气，术中ＰａＣＯ２仅有升高趋势但无显著性差异（Ｐ＞０．０５），且其水平明显低于高频组（Ｐ＜０．０１））。两组患者术中的ＰａＯ２均明显升高且两组间无差异（Ｐ＞０．０５）。结论：无论是常频还是高频喷射通气都能满足机体对供氧的需要，而常频通气比高频通气更有利于二氧化碳排出，由此认为支撑喉镜术中宜采用常频常压喷射通气。
OBJECTIVE: To compare the ventilation effect of frequent jet and high-frequency jet ventilation in supportive laryngoscopy. Methods: Thirty-two patients with vocal polyps of grade ASAⅠ-Ⅱ were enrolled in this study. They were randomly divided into two groups, 16 patients in each group: high-frequency group and common-frequency group. Results: Ventilation was performed at a frequency of 60 beats per minute with a pressure of 160 kPa. During surgery, PaCO2 was significantly elevated (P <0.01) and hypercapnia was developed. Ventilation was performed at a pressure of 160 kPa at a frequency of 22 beats per minute PaCO2 increased only in the trend but no significant difference (P> 0.05), and its level was significantly lower than the high-frequency group (P <0.01). PaO2 in both groups was significantly higher than that in the two groups (P> 0.05). CONCLUSION: Both regular and high-frequency jet ventilation can meet the body’s need for oxygen supply, and frequent ventilation is more conducive to carbon dioxide emissions than high-frequency ventilation, so that the support laryngoscopy should be used in normal frequency and pressure jet Ventilation.