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Physiological dead space in lungs1/19/2024 Tidal volume is vital when it comes to setting the ventilator in critically ill patients. The volume of inspired and expired air that helps keep oxygen and carbon dioxide levels stable in the blood is what physiology refers to as tidal volume. Expiration occurs to expel carbon dioxide and prevent it from accumulating in the body. At the same time, carbon dioxide continuously forms as long as metabolism takes place. It then diffuses across the alveolar-capillary interface to reach arterial blood. When a person breathes in, oxygen from the surrounding atmosphere enters the lungs. It is a vital clinical parameter that allows for proper ventilation to take place. It measures around 500 mL in an average healthy adult male and approximately 400 mL in a healthy female. Tidal volume is the amount of air that moves in or out of the lungs with each respiratory cycle.
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