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Published byJuho Lahti Modified over 5 years ago
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Airway pressure and flow graphics illustrate delayed cycling.
Airway pressure and flow graphics illustrate delayed cycling. A: Normal respiratory mechanics. The cycle setting is 25% of peak inspiratory flow. Cycling is ideal, as indicated by the fact that the inspiratory flow decreases to the 25% cycling level at the end of the patient's neural inspiratory time (TI). B: Obstructive respiratory mechanics. The change in the inspiratory flow curve leads to the 25% level being reached later, well after the end of the neural TI. The duration of delayed cycling is represented by the excess TI. Increasing the cycle setting to 60% of peak inspiratory flow corrects this problem, and cycling occurs at the end of neural TI. Insp = inspiration. Exp = expiration. (Adapted from Reference 22, with permission BioMed Central.) Michael A Gentile Respir Care 2011;56:52-60 (c) 2012 by Daedalus Enterprises, Inc.
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