Pressure Dynamics Basics
Pressure changes drive ventilation by creating gradients that move air into and out of the lungs and these gradients depend on diaphragm movement chest wall mechanics and airway resistance.
Intrapleural Pressure
Intrapleural pressure remains negative during normal breathing and helps keep lungs expanded and stable throughout the respiratory cycle.
Alveolar Pressure
Alveolar pressure fluctuates during inhalation and exhalation and determines airflow direction and magnitude.
Transpulmonary Pressure
Transpulmonary pressure represents the difference between alveolar and intrapleural pressure and reflects lung distending force.
Clinical Application
Understanding pressure dynamics helps clinicians adjust ventilator settings to support safe and effective ventilation.
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