![]() The physiological dead space is the combination of anatomic and alveolar dead space. Thus, only one alveolus is receiving ventilation and perfusion (alveolus 2) alveolus 1 and 3 are being ventilated but not perfused (ie, alveolar dead space). Is alveolar dead space the same as physiological dead space? The anatomical dead space is the total volume of the conducting airways from the nose or mouth to the terminal bronchioles, and in ventilated infants includes the apparatus dead space (endotracheal tube and flow sensor). The physiological dead space is the anatomical dead space plus alveolar dead space. ![]()
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