This volume is considered to be 30% of normal tidal volume (500 mL) therefore, the value of anatomic dead space is 150 mL. Anatomical dead space is represented by the volume of air that fills the conducting zone of respiration made up by the nose, trachea, and bronchi. The two types of dead space are anatomical dead space and physiologic dead space. I literally know nothing more on the subject.Dead space represents the volume of ventilated air that does not participate in gas exchange. Treat a pulmonary embolus or anything perfusion limited, assuming Pressure difference across HEALTHY lung (in this instance) willĬause a higher oxygen saturation than typical in the remainingĬapillary beds not blocked by the embolus. Good would adding more O2 do? Again, increasing the partial Shows equilibration of gases by the end of the capillary, so what This is tricky, because perfusion limitation In the case of a pulmonary embolism, there is Blasting them with O2 will do little.ĭead space or perfusion limitation on the other hand does YouĪre not doing anything to ameliorate the initial problem: bad Such people cannot be treated with 100% O2 very successfully. Participating in gas exchange for the reasons I just mentioned.Īlso think of pulmonary fibrosis, where thickness is increased. Surface area is diminished because of less healthy lung tissue Little fibrosis in emph., it's not a thickness issue). Partial pressure of the gas of interest on both sides (in the blood The surface area available for exchange, and the difference in Membrane/solubility of the gas, the thickness of this interface, There is a limitation to diffusion because theĮndothelial alveolar interface is destroyed in emphysema. Shunts are diffusion limited byĭefinition.
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