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Figure 4 | Critical Care

Figure 4

From: Comparative evaluation of three interfaces for non-invasive ventilation: a randomized cross-over design physiologic study on healthy volunteers

Figure 4

The pressure-time product of the transdiaphragmatic pressure calculated per breath, per minute, and per liter. (A) Calculation per breath; (B) calculation per minute; (C) calculation per liter. FM: face mask; HN: helmet next; HS: helmet standard; PEEP: positive end-expiratory pressure; PS: pressure support; PTPdi: pressure-time product of the transdiaphragmatic pressure; SB: spontaneous breathing.

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Critical Care

ISSN: 1364-8535