Also shown are P aCO 2, the partial pressure of venous carbon dioxide (P vCO 2), the relationship between P aCO 2 and minute CO 2 production (V̇ CO 2) and alveolar gas volume, the partial pressure of mixed alveolar carbon dioxide (P ACO 2), the partial pressure of end-tidal carbon dioxide (P ETCO 2), and the P ĒCO 2 in relation to the model and the volumetric capnogram. The dead space fraction is equal to V Dphys divided by tidal volume (V T). The sum of the regions of alveolar dead space (V Dalv) and anatomic dead space (V Danat) equal the physiologic dead space (V Dphys). The pure dead-space compartment represents areas of ventilation with no perfusion. The pure shunt compartment represents areas of perfusion without ventilation. Answer is C true Anatomical dead space is equal to the volume of the conducting zone- true Anatomical dead space is not equal to tidal volume. The ideal compartment represents areas of perfect alveolar gas volume to Q̇ T matching. True or False: The volume of anatomical dead space cannot be changed and does not vary with circumstances within a given individual. pharynx alveoli larynx main bronchi trachea all but alveoli. The 3-compartment lung model described by Riley and Cournand 151, 152 represents gas exchange in the lung in regard to the matching of alveolar gas volume (V̇ A) and perfusion (Q̇ T), shunt (Q̇ S), and dead space (V D). Which structures are part of the conducting zone of the respiratory system.
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