KINE 3012 Lecture Notes - Lecture 3: Transpulmonary Pressure, Intrapleural Pressure, External Intercostal Muscles
6 Mar 2018
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F= deltap/resistance the movement of air from the environment into the lungs. Deltap: this is the pressure di erence there are 3 pressures that determine air movement in and out of the lung, patm, which is atmospheric pressure, which is the pressure of this room, usually 760 mm of mercury. This pressure is pushing down on us: palv, which is alveolar pressure, which is the pressure within the lung. This air pushes two ways, out against the atmospheric air, and out against the pressure in the intrapleural space: pip, which is the pressure in the intrapleural space . If there is movement, there is a pressure di erence, or an imbalance in pressure. If there is no movement, then there is a balance of pressure. If air is moving out, the pressure of the alveolus is greater than the pressure of the atmospheric to deal with this we use boyle"s law, which is p1v1=p2v2.
