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Fig. 1 | Critical Care

Fig. 1

From: How I optimize power to avoid VILI

Fig. 1

Airway pressure profile during inflation with constant flow. Under these conditions, time is an accurate surrogate for inspired volume. Ppeak and Pplat are the peak dynamic and static (“plateau”) pressures. Total PEEP is comprised of the set PEEP value and auto-PEEP. Areas A, B, and C correspond to the flow resistive, tidal elastic, and PEEP-related tidal energy components, respectively. The sum of these three areas defines the total inflation energy of the tidal cycle: FR + DP/2 + PEEPtot. Note that while PEEP-related elastic energy (area C) elevates the inflation stress and strain platform for driving pressure, its temporarily stored elastic energy dissipates completely across the exhalation valve and circuitry during deflation

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Critical Care

ISSN: 1364-8535