![]() Describes the regional differences in alveolar ventilation found in the normal lung and explains these differences. Predicts the effects of alterations of alveolar ventilation on alveolar carbon dioxide and oxygen levels. Alveolar ventilation is the sole determinant of CO2 excretion and is equal to the total exhaled ventilation minus dead space ventilation (VA VE-VD). However, differences in the exact way of measuring this space result in clinically significant different results and, therefore, debate remains about the true value of this measured parameter.Ĭopyright © 2023, StatPearls Publishing LLC. Defines physiologic and alveolar dead space and understands their determination. ![]() Anaesthetic gases (unknown mechanism) Reduced pulmonary artery pressure (e.g. Indeed, it may serve as a prognostic factor in patients with acute repository distress syndrome (ARDS) who require ventilation. What factors increase alveolar dead space Increasing age. This phenomenon has clinical significance because, both in healthy and impaired lungs, properly calculating and accounting for this non-physiological space is important for the proper respiratory care of ventilated patients. ![]() This is therefore termed anatomical dead space as it serves no respiratory function. Anatomic dead space is an important phenomenon in respiratory physiology whereby, owing to the fact that upper airways do not function as locations for gas exchange, and because of the tidal nature of ventilation, there is always a fraction of the inspired air that does not perform a physiologic function of exchanging carbon dioxide for oxygen. ![]()
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