Pressures that are measured in the ventilator or in the ventilator breathing circuit are called ______________ pressure
A. alveolar distending
B. static
C. airway opening
D. transpulmonary
?ANS: C
A. Incorrect response: Alveolar distending pressure is the pressure required to maintain the lungs inflated at the end of inspiration. The pressures Pstatic and Pplateau are essentially interchangeable.
B. Incorrect response: The static pressure is the pressure obtained during an inspiratory pause. It is the pressure exerted to main lung inflation at the end of inspiration.
C. Correct response: Airway pressure or airway opening pressure measures the pressure inside the ventilator or within the ventilator tubing.
D. Incorrect response: The transpulmonary pressure is the pressure difference (gradient) between the alveolar pressure and the pleural pressure. It is the pressure responsible for enabling the lungs to fill during inspiration.
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