Effect of respiratory mechanics on cycling of pressure support from inhalation to exhalation. Effect of respiratory mechanics on cycling of pressure support.

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By: Susan P. Pilbeam, MS, RRT, FAARC John D. Hiser, MEd, RRT, FAARC

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Presentation transcript:

Effect of respiratory mechanics on cycling of pressure support from inhalation to exhalation. Effect of respiratory mechanics on cycling of pressure support from inhalation to exhalation. Flow cycling is set at 25% of the peak flow, as illustrated by the broken line. The upper panel represents the respiratory mechanics of a patient with restrictive lung disease. The lower panel represents the respiratory mechanics of a patient with obstructive lung disease. In each case the neural inspiratory time is 1.0 second. The breath terminates prematurely in the patient with restrictive lung disease, but the breath is prolonged in the patient with obstructive lung disease. Also note that the peak flow is greater in restrictive lung disease, and the pressure decrease is more rapid in restrictive lung disease. (Adapted from Reference 19.)‏ Michael A Gentile Respir Care 2011;56:52-60 (c) 2012 by Daedalus Enterprises, Inc.