Endotracheal tube, by the venturi effect, reduces the efficacy of increasing inlet pressure in improving pendelluft
Fig 4
Gas flow through the invasive and non-invasive models.
Gas flow rates through the inlet and each of the six outlet groups in the invasive and non-invasive models, under the non-effort (A), strong fluid-like effort (B), and strong solid-like effort (C) conditions. The gray and black bar graphs in each figure indicate the invasive model and non-invasive models, respectively. The gas flow into the models was described as positive, and the gas flow out of the models was described as negative. LL: Left lower; LM: Left middle; LU: Left upper; RL: Right lower; RM: Right middle; RU: Right upper.