Mean airway pressure

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Mean airway pressure typically refers to the mean pressure applied during positive-pressure mechanical ventilation. Mean airway pressure correlates with alveolar ventilation, arterial oxygenation,[1] hemodynamic performance, and barotrauma.[2]


Determining the real mean airway pressure is a difficult task and there are several equations aimed at determining the real mean airway pressure. Various equations are suggested to be used to determine the actual mean airway pressure;


Unique mechanical ventilation equations[edit]

Mean airway pressure in airway pressure release ventilation


  1. ^ Stewart AR, Finer NN, Peters KL (1981). "Effects of alterations of inspiratory and expiratory pressures and inspiratory/expiratory ratios on mean airway pressure, blood gases, and intracranial pressure.". Pediatrics. 67 (4): 474–81. PMID 6789294. 
  2. ^ Marini JJ, Ravenscraft SA (1992). "Mean airway pressure: physiologic determinants and clinical importance--Part 2: Clinical implications.". Crit Care Med. 20 (11): 1604–16. doi:10.1097/00003246-199211000-00020. PMID 1424706. 
  3. ^ David W. Chang (1999). Respiratory care calculations. Cengage Learning. pp. 251–. ISBN 978-0-7668-0517-0. Retrieved 30 March 2012.