Which of the following changes in respiratory mechanics occurs when a patient switches from positive-pressure breathing to spontaneous ventilation?
A. increased pulmonary compliance
B. decreased mean pleural pressure
C. decreased respiratory muscle effort
D. decreased diaphragmatic involvement
Question 2
Which of the following hemodynamic alterations will occur when a patient transitions from positive-pressure breathing to spontaneous ventilation? I. Venous return increases. II. Left ventricular afterload increases. III. Right ventricular preload decreases. IV. Cardiac output decreases.
A. I, II only
B. I, II, III only
C. I, III, IV only
D. II, III, IV only