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Table 1 Mean ± half width of the 95% confidence interval of the blood gas, capnography, ventilation and forced oscillatory parameters obtained under the baseline condition when conventional mechanical ventilation was applied

From: Expiratory high-frequency percussive ventilation: a novel concept for improving gas exchange

Blood gas

Capnography

Ventilation

Forced oscillations

PaCO2 (mmHg)

37.5 ± 3.4

VDF/VT (%)

37.5 ± 1.0

VT (ml)

24.6 ± 1.6

Raw (cmH2O.s/l)

12.8 ± 2.0

PaO2 (mmHg)

71.1 ± 7.6

S2V (mmHg/ml)

11.5 ± 0.6

Pmax (cmH2O)

11.8 ± 0.8

G (cmH2O/l)

86.7 ± 16.6

SaO2 (%)

94.7 ± 2.1

V′CO2 (ml)

26.1 ± 2.2

Pmin (cmH2O)

2.9 ± 0.01

H (cmH2O/l)

237.8 ± 22.0

    

Pmean (cmH2O)

5.8 ± 0.1

  
  1. PaCO2: partial pressure of carbon dioxide in the arterial blood, PaO2: partial pressure of oxygen in the arterial blood, SaO2: arterial oxygen saturation. VDF/VT: dead space fraction according to Fowler, S2V: phase 2 slope of the volumetric capnogram, V’CO2: eliminated CO2 volume in a minute. VT: tidal volume, Pmean: mean airway opening pressure, Pmax: peak airway opening pressure, Pmin: minimum airway opening pressure. Raw: airway resistance, G: respiratory tissue damping (viscous resistance), H: respiratory tissue elastance (stiffness)