Ventilation (physiology)
In respiratory physiology, ventilation (or ventilation rate) is the rate at which gas enters or leaves the lung. It is categorized under the following definitions:
| Measurement | Symbol | Equation | Description |
| Minute ventilation | = tidal volume * respiratory rate | the total volume of gas entering the lungs per minute. | |
| Alveolar ventilation | = (tidal volume - dead space) * respiratory rate | the volume of gas per unit time that reaches the alveoli, the respiratory portions of the lungs where gas exchange occurs. | |
| Dead space ventilation | = dead space * respiratory rate | is the volume of gas per unit time that does not reach these respiratory portions, but instead remains in the airways (trachea, bronchi, etc.). |
Read more about Ventilation (physiology): Sample Values