1. Ventilator-imposed Work of Breathing
Jeffrey A Katz, M.D., Roger W. Kraemer, C.R.T.T. 
CHEST 
Volume 90, Issue 5, Pages (November 1986)
DOI: /chest
Copyright © 1986 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Pressure-volume curves for the Siemens 900B and 900C at 10 cm H2O end-expiratory pressure at an inspiratory flow of 40 L/min. Note the increased additional work with the Bennett Cascade as compared to the Bird humidifier.
CHEST  , DOI: ( /chest )
Copyright © 1986 The American College of Chest Physicians Terms and Conditions