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Table 3 Comparisons between VCV (test), PCV, and PSV in the severely obstructive lung model

From: Accuracy of the estimations of respiratory mechanics using an expiratory time constant in passive and active breathing conditions: a bench study

 

ΔP

PIF

PEF

Crs

RCexp

Rinsp

Rexp

(cmH2O)

(L/min)

(L/min)

(ml/cmH2O)

(ms)

(cmH2O/L·s)

(cmH2O/L·s)

VCV

8.88 ± 0.05

30.97 ± 0.50

25.04 ± 0.33

50.81 ± 1.28

918.19 ± 15.33

18.07 ± 0.30

21.27 ± 0.30

7.0 ml/kg

PCV

8.15 ± 0.07

16.06 ± 0.09

16.64 ± 0.16

40.86 ± 1.39

1239.64 ± 9.87

30.37 ± 0.33

30.35 ± 0.44

5.0 ml/kg

PCV

11.24 ± 0.27

23.38 ± 0.17

23.33 ± 0.51

40.23 ± 0.45

1180.38 ± 15.61

28.83 ± 0.22

29.34 ± 0.29

7.0 ml/kg

PCV

16.15 ± 0.42

28.92 ± 1.27

27.47 ± 0.53

39.06 ± 0.32

1331.78 ± 14.15

33.47 ± 0.47

34.09 ± 0.38

10.0 ml/kg

PSV

6.08 ± 0.07

23.75 ± 0.19

15.91 ± 0.17

50.97 ± 1.65*

933.50 ± 10.57

15.33 ± 0.18

18.32 ± 0.26

5.0 ml/kg

(P = 0.550)

PSV

9.09 ± 0.13

30.34 ± 1.09

20.30 ± 0.33

45.48 ± 0.61

964.31 ± 10.83

17.96 ± 0.24*

21.20 ± 0.32*

7.0 ml/kg

(P = 0.421)

(P = 0.652)

PSV

15.29 ± 0.45

43.73 ± 2.12

29.36 ± 0.55

38.76 ± 0.52

945.45 ± 14.97

20.96 ± 0.20

24.40 ± 0.34

10.0 ml/kg

F

11353.663

11293.037

7544.748

1004.536

1610.687

4818.595

2341.453

ANOVA p-value

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

  1. VTE expiratory tidal volume, N.S not significant, ΔP driving pressure, PIF peak inspiratory flow, PEF peak expiratory flow, Crs respiratory system compliance, RCexp expiratory time constant, Rinsp inspiratory airway resistance, Rexp expiratory airway resistance
  2. *P values (Student t test) are for comparisons between PSV, PCV, and VCV. Data are shown as means ± standard deviation and are the results of eight measurements/case
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European Journal of Medical Research

ISSN: 2047-783X

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