It must be adequate for removal of the CO 2 produced by tissue metabolism whereas the partial pressure of inspired O 2 is 150 mmHg, the partial pressure of O 2 in the alveoli is typically 100 mmHg because of the displacement of O 2 with CO 2. Alveolar ventilation is the gas flow entering functional alveoli per minute.Īlveolar ventilation: It is the single most important parameter of lung function. Physiologic dead space can greatly exceed anatomic dead space in individuals with lung disease.ĭead space ventilation is the gas flow into dead space per minute. In normal individuals, anatomic and physiologic dead space are approximately equal. g., because of a pulmonan embolus preventing blood supply to a region of alveoli). It includes the anatomic dead space and partially functional or nonfunctional alveoli (e. Physiologic dead space is the volume of the respiratory tract that does not participate in gas exchange. e., the trachea and bronchi up to and including the terminal bronchioles. Total ventilation is the sum of dead space ventilation and alveolar ventilation.Īnatomic dead space is equivalent to the volume of the conducting airways (150 mL in normal individuals), i. It is equal to the tidal volume (VT) x the respiratory rate (n). Total ventilation (VT, minute ventilation) is the total gas flow into the lungs per minute.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |