Which disease is the alveoli ventilated but not perfused? … This is believed to be due primarily to changes in the distribution of alveolar ventilation. Roughly, the fraction of alveoli without blood flow equals the fraction: alveolar dead space/alveolar tidal volume. What is alveoli dead space?Īlveolar dead space is believed to be an index of the uniformity of blood flow distribution to the lung. Dead space is an integral part of volume capnography, which measures expired CO2 and dead space (VDphys/VT) on a breath-by-breath basis for efficient monitoring of patient ventilation. How do you calculate alveolar in dead space?Įstimating the dead space can be of significant value in clinical situations for diagnostic, prognostic, and therapeutic value.What is a normal alveolar ventilation rate?.What is the average alveolar ventilation?.
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