alveolar pressure


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alveolar pressure (PA)

the pressure in the alveoli of the lungs.

alveolar pressure

Air pressure in the alveoli and bronchial tree. When this pressure is positive, it is higher than atmospheric pressure; when negative, less. Gases flow from higher to lower pressures: when alveolar pressures are higher than atmospheric pressure, respiratory gases tend to be exhaled. When alveolar pressures are less than atmospheric pressures, gas flows into the lungs. Synonym: intrapulmonic pressure
See also: pressure
References in periodicals archive ?
This was done under the assumption that during the transient interruption of airflow, mouth pressure equilibrates with alveolar pressure.
PPLAT faithfully approximates alveolar pressure and as such is a very useful clinical assessment tool.
If one considers what the interstitial pressure is during negative and positive pressure ventilation, the inescapable conclusion is that for the same lung volume, it must be higher under controlled conditions, even when end expiratory alveolar pressure is the same or PEEP is not used.
Alveolar pressure pushes both the lung and the chest wall outward, so that some percentage of the recorded plateau pressure results from the recoil of the chest wall.