![]() 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. Types of Dead Spaceĭead space from equipment, such as tubes ventilator circuitry. The presence of alveolar dead space and physiological shunt-ing therefore move PA O 2 and Pa O 2 in opposite directions and create the A-a PO 2 difference. Glomerular Filtration and Tubular Functionĭead space is the proportion of minute ventilation which does not participate in gas exchange. ABSTRACT An elevated physiological dead space, calculated from measurements of arterial CO2andmixed expired CO2, has proven to be a useful clinical marker of prognosis both for patients with acuterespiratory distress syndrome and for patients with severe heart failure. We determined if there were differences in. Functional Anatomy and Control of Blood Flow Dead space is the volume not taking part in gas exchange and, if increased, could affect alveolar ventilation if there is too low a delivered volume.
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