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Table 1 Respiratory system mechanic variables according to different compartment models

From: Respiratory system mechanics in one-lung ventilation using double-lumen tubes

Model

Signals measured at

RMSE (cmH2O)

C (mL/cmH2O)

R (cmH2O·s/L)

I (cmH2O·s2/L)

RC

Ventilator

1.0 ± 0.5

19 ± 1

26 ± 6

n.a

PNT

0.4 ± 0.2

17 ± 1

15 ± 4

n.a

RCI

Ventilator

0.9 ± 0.5

18 ± 1

25 ± 6

0.35 ± 0.1

PNT

0.4 ± 0.2

16 ± 1

13 ± 4

0.10 ± 0.0

  1. Values are mean ± standard deviation from 80 cycles during an inspiratory flow ramp down trial with flow values at 40, 35, 30,…, 20, 15 L/min, tidal volume of 244 ml, I:E = 1:1 and respiratory rate set to 15 min−1. Compliance (C), resistance (R) and inertance (I) as determined based on signals acquired at the ventilator and the pneumotachograph (PNT) using a two- (RC) and a three-compartmental model (RCI)