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Table 1 Summary of the respiratory data during VCV1, FLEX and VCV2

From: Dorsal recruitment with flow-controlled expiration (FLEX): an experimental study in mechanically ventilated lung-healthy and lung-injured pigs

  VCV 1 FLEX VCV 2
Healthy lung
 Compliance (ml·cm H2O− 1) 53 ± 6 51 ± 5 52 ± 5
 FlowPeak exp (ml s− 1) − 669 ± 70 − 261 ± 12* − 679 ± 64*
 PEEP (cm H2O) 8 8 8
 Pplat (cm H2O) 16 ± 1 17 ± 1 16 ± 1
 Pmean (cm H2O) 12.3 ± 0.5 13.7 ± 0.5* 12.4 ± 0.4
 VT (ml) 419 ± 0.1 418 ± 0.2 418 ± 0.1
 Zero flow time (s) 1.3 ± 0.1 0.5 ± 0.1* 1.3 ± 0.1
Injured lung
 Compliance (ml·cm H2O−1) 17 ± 3 16 ± 3 17 ± 3
 FlowPeak exp (ml s− 1) − 970 ± 162 − 303 ± 11* − 968 ± 161
 PEEP (cm H2O) 12 ± 2 12 ± 2 12 ± 2
 Pplat (cm H2O) 37 ± 3 39 ± 2 36 ± 3
 Pmean (cm H2O) 24.6 ± 1.6 28 ± 3ǂ 24.2 ± 1.7
 VT (ml) 418 ± 0.2 418 ± 0.3 418 ± 0.2
 Zero flow time (s) 1.4 ± 0.3 0.7 ± 0.1* 1.4 ± 0.3
  1. Data are given as mean SD
  2. FLEX flow-controlled expiration, FlowPeak exp maximum expiratory flow, PEEP positive end-expiratory pressure, Pmean mean tracheal pressure, Pplat plateau pressure, VCV volume-controlled ventilation VT tidal volume
  3. *Statistically significant