![]() ![]() This air is called Anatomical Dead Space because it does not participate in gas exchange. The larger respiratory branches, bronchi and trachea contain air that does not reach the alveoli. Total Pulmonary Ventilation = Breaths/min * Tidal VolumeĪlveolar ventilation is similar but considers only the fresh oxygenated air that reaches the alveoli. It is assumed of course that the volume of each breath remains the same for each minute. ![]() This is generally calculated by taking the volume of air moved in and out of the lungs in a single breath (tidal volume) and then multiplying this by the breathing rate per minute. Total pulmonary ventilation is the amount of air moved into and out of the respiratory passages per minute. In order to understand alveolar ventilation, it might be helpful to first introduce total pulmonary ventilation. PAO 2 is also dependent on sufficient alveolar ventilation. ![]()
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