![]() 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. Alveolar dead space increases with tidal volume so that the sum of anatomical and alveolar ( physiological) dead space remains about 32 of tidal volume (Fig. Types of Dead Spaceĭead space from equipment, such as tubes ventilator circuitry. Glomerular Filtration and Tubular Functionĭead space is the proportion of minute ventilation which does not participate in gas exchange. The physiologic dead space is the volume of inspired air that does not participate in gas exchange. Ventilation is the movement of air through the respiratory tract into (inspiration) and out of (expiration) the respiratory zone ( lungs ). This concept can be extended to include factors that cause a dead space effect. Summary The main function of the respiratory system is gas exchange (O 2 and CO 2 ). ![]() Functional Anatomy and Control of Blood Flow Definitions Simply put, dead space represents the volume of ventilated air that does not participate in gas exchange.
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