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Table 1 Comparison between VCV (test), PCV, and PSV in the normal adult 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

8.80 ± 0.03

30.13 ± 0.58

49.72 ± 0.73

50.83 ± 1.31

541.96 ± 7.74

4.74 ± 0.54

10.66 ± 0.15

7.0 ml/kg

PCV

6.16 ± 0.16

22.76 ± 0.13

24.65 ± 0.13

51.33 ± 1.39*

590.33 ± 6.82

16.21 ± 0.43

11.51 ± 0.32

5.0 ml/kg

PCV

8.42 ± 0.05

31.31 ± 2.12

33.26 ± 1.22

51.66 ± 1.34

618.36 ± 7.11

16.11 ± 0.12

11.97 ± 0.16

7.0 ml/kg

PCV

12.44 ± 0.06

39.70 ± 2.11

40.10 ± 1.61

49.31 ± 0.77

725.19 ± 7.65

18.78 ± 0.54

14.71 ± 0.13

10.0 ml/kg

PSV

2.13 ± 0.07

33.70 ± 0.16

27.61 ± 0.22

152.44 ± 5.07

574.21 ± 4.30

3.78 ± 0.12

3.77 ± 0.13

5.0 ml/kg

PSV

4.16 ± 0.05

46.63 ± 2.17

37.0641.34

100.23 ± 1.36

508.62 ± 6.48

5.35 ± 0.08*

5.07 ± 0.05

7.0 ml/kg

(P = 0.007)

PSV

8.18 ± 0.09

71.34 ± 2.17

58.97 ± 3.87

74.26 ± 0.84

465.96 ± 4.36

6.87 ± 0.08

6.28 ± 0.08

10.0 ml/kg

F

13,152.430

31,222.510

9316.271

2748.197

1414.282

4396.553

4846.627

ANOVA p-value

 < 0.0001

 < 0.000

 < 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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