Effects of incomplete inspiration (A) or incomplete expiration (B) on gas exchange. Effects of incomplete inspiration (A) or incomplete expiration (B)

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Presentation transcript:

Effects of incomplete inspiration (A) or incomplete expiration (B) on gas exchange. Effects of incomplete inspiration (A) or incomplete expiration (B) on gas exchange. An incomplete inspiration leads to decreases in tidal volume and mean airway pressure. Hypercapnia and hypoxemia may result. An incomplete expiration may lead to decreases in compliance and tidal volume and an increase in mean airway pressure. Hypercapnia with a decrease in PaO2 may result. However, gas trapping and its resulting increase in mean airway pressure may decrease venous return, reducing cardiac output and impairing oxygen delivery. From Carlo WA, Greenough A, Chatburn RL. Advances in conventional mechanical ventilation. In: Boynton BR, Carlo WA, Jobe AH, eds. New Therapies for Neonatal Respiratory Failure. Boston, Mass: Cambridge University Press; 1994. Waldemar A. Carlo, and Namasivayam Ambalavanan Pediatrics in Review 1999;20:e117-e126 ©1999 by American Academy of Pediatrics

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