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1 result(s) for "通气频率"
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环甲膜通气物理学模型观察
目的 评价环甲膜通气条件下通气压力和频率对模拟肺的胸内压、气道压和肺内压等有关参量的影响,探讨环甲膜通气物理数据及其安全性。方法 采用物理肺模型模拟环甲膜通气,当改变氧气工作压力和通气频率时,观察模型中的胸内压、气道压和肺内压数值变化。结果 在工作压力不变的情况下,通气频率增加,胸内负压升高,气道压和肺内压下降。工作压力超过3kg·cm^-2,通气频率较低时易引起胸内压、气道压和肺内压过度增高造成气压伤。结论 采用3kg·cm^-2工作压力,频率在15~30次·min^-1之间进行环甲膜通气是安全的。