Phase IV is the inspiratory downstroke. This is the beginning of the inhalation and the carbon dioxide curve falls steeply to zero. 階段IV是吸氣下降支。這是吸入的開始及二氧化碳曲線急速降為零。
Objective:To observe and evaluate the pulmonary density and volume in inspiratory and expiratory phase of COPD patients with ordinary CT scanners. 目的：評價慢性阻塞性肺部疾?。–OPD）肺部密度和體積在普通CT雙相掃描下的表現(xiàn)。
Direct visualization, by bronchoscopy, of paradoxical adductive vocal cords movement in the inspiratory phase during a symptomatic period further confirmed the diagnosis. 在癥狀發(fā)作時，氣管鏡檢查亦發(fā)現(xiàn)在吸氣期，聲帶有反常之內(nèi)收現(xiàn)象，這更進(jìn)一步幫我們確定診斷。