![]() ![]() Tidal volume is the amount of air that enters or leaves. Some apparatus dead space may actually reduce total dead space, as an ETT bypasses the majority of anatomical dead space of the patient (nasopharynx).ĭead space from the patient. The formula for alveolar ventilation is (tidal volume - physiological dead space) x respiratory rate. Types of Dead Spaceĭead space from equipment, such as tubes ventilator circuitry. The value of tidal volume minus dead space was obtained from the dilution factor in the best single exponential fit to the wash out data according to equation 1. Thus, the normal dead space volume is 150 ml. Glomerular Filtration and Tubular Functionĭead space is the proportion of minute ventilation which does not participate in gas exchange. Due to the anatomical dead space, out of 500 ml of tidal inspiration, 350 ml of air enters the alveoli. ![]() Functional Anatomy and Control of Blood Flow
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