Transpulmonary pressure
Transpulmonary Pressure
Transpulmonary pressure (pronunciation: trans-pul-mo-nar-y pres-sure) is a term used in pulmonology to describe the pressure difference between the alveolar pressure and the intrapleural pressure in the pleural cavity.
Etymology
The term "transpulmonary pressure" is derived from the Latin trans meaning "across", pulmo meaning "lung", and the English word "pressure".
Definition
Transpulmonary pressure is the difference in pressure between the inside of the lung (alveolar pressure) and the pressure in the space between the lung and the chest wall (intrapleural pressure). It is a measure of the lung's tendency to collapse (its elastic recoil) and the chest wall's tendency to expand.
Calculation
Transpulmonary pressure is calculated by subtracting the intrapleural pressure from the alveolar pressure.
Related Terms
- Alveolar pressure: The pressure inside the alveoli when the glottis is open and no air is flowing into or out of the lung.
- Intrapleural pressure: The pressure within the pleural cavity, which is always negative relative to atmospheric pressure.
- Pleural cavity: The potential space between the two pleurae of the lungs.
- Pulmonology: The medical specialty dealing with diseases involving the respiratory tract.
See Also
External links
- Medical encyclopedia article on Transpulmonary pressure
- Wikipedia's article - Transpulmonary pressure
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