Ventilation (physiology)

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In respiratory physiology, ventilation (or ventilation rate) is the rate at which gas enters or leaves the lung. It is categorised under the following definitions:

Measurement	Symbol	Equation	Description
Minute ventilation		= tidal volume * respiratory rate[1][2]	the total volume of gas entering the lungs per minute.
Alveolar ventilation		= (tidal volume - dead space) * respiratory rate [1]	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[3]	is the volume of gas per unit time that does not reach these respiratory portions, but instead remains in the airways (trachea, bronchi, etc.).

Contents 1 Sample values 2 See also 3 References 4 External links

[edit] Sample values

Measure	Sample value
Tidal volume	0.5 L
Respiratory rate	15 breaths/minute
Minute ventilation	7.5 L/min
Dead space	0.1667 L
Dead space ventilation	2.5 L/min
Alveolar ventilation	5.0 L/min

[edit] See also

• Gas exchange
• Fowler method

[edit] References

[edit] External links

• MeSH Pulmonary+ventilation
• RT Corner (Educational Site for RT's and Nurses) at rtcorner.net

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