Pulmonary Physiology - Gas Pressures & Volumes
Module 2 - Dr. D. Penney
To understand the relationships between the lung volumes most commonly referred to in clinical and experimental physiology (TV, IRV, ERV, FRC, VC, TLC ) and other widely cited parameters
To understand the concept of partial pressures of gases and how they are calculated.
To understand the concept of Dead Space and its contribution to Total (minute) Ventilation as opposed to Alveolar Ventilation.
To understand how the values of the partial pressures of the three respiratory gases change from the point of inspiration, through the "respiratory compartments" - to the expiration point, including the FRC's buffer role.
The Ventilatory Cycle:
The ventilatory cycle is much like the cardiac cycle, except that it consists of just 2 phases, inspiration and expiration, while the cardiac cycle usually consists of 6 phases. Tidal volume is analogous to stroke volume.
The Ventilatory Cycle, showing Tidal Volume.
Last Changed 05/12/00
Back To Main 546 Index