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Air flow during ventilator-supported speech production.

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Presentation on theme: "Air flow during ventilator-supported speech production."— Presentation transcript:

1 Air flow during ventilator-supported speech production.
Air flow during ventilator-supported speech production. The black circles represent occlusions, and the gray circle represents higher than usual impedance. A: During inspiration, air flows both toward the lungs and through the larynx. B: During usual expiration, almost all air flows toward the ventilator. This is because the impedance of the ventilator pathway is much lower than that of the laryngeal pathway during speech production. C: During expiration with PEEP, the impedance of the ventilator pathway is higher than usual, so more air flows through the larynx. D: During expiration with a one-way valve, all air flows through the larynx. From Reference 46 with permission. Dean R Hess, and Neila P Altobelli Respir Care 2014;59: (c) 2012 by Daedalus Enterprises, Inc.

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