This volume is called the expiratory reserve volume ( ERV). Then this volume is called the Total functional (dynamic) dead space.Īfter the normal exhalation, a person still has the opportunity to exhale forcefully, thus exhale air of volume of about 1,7 l. This volume can be further increased by the volume of such alveoli, which are not capable of exchanging respiratory gases. It also contains the so-called dead space (anatomic respiratory dead space), which indicates the volume of the airways up to the terminal bronchioles. Tidal volume ( V T or TV) is the volume of one inhalation. In practice, therefore, the absolute value is given in liters and a relative percentage is given, which compares the measured results with persons of the same age, sex, height and weight. They are affected by height, weight, age, training, gender and health.
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