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Table 2 Respiratory and hemodynamic data during the three steps of the study

From: Diaphragm ultrasound as indicator of respiratory effort in critically ill patients undergoing assisted mechanical ventilation: a pilot clinical study

 

PS15

PS5

PS0

P

Tidal volume, ml

836 ± 250

496 ± 210

456 ± 182

<0.001

Respiratory rate, min−1

10.7 ± 4.3

16.0 ± 6.8

16.7 ± 7.6

0.003

Minute ventilation, l/min

8.2 ± 2.1

7.4 ± 2.5

6.8 ± 2.1

0.119

Mean airway pressure, cmH2 O

11.8 ± 2.9

8.7 ± 2.0

7.6 ± 1.9

<0.001

Mean arterial pressure, mmHg

77.9 ± 8.8

78.8 ± 10.6

80.2 ± 11.4

0.751

Heart rate, min−1

63.9 ± 19.1

65.7 ± 19.4

66.5 ± 21.0

0.899

pH

7.39 ± 0.05

7.37 ± 0.04

7.36 ± 0.04

0.090

PaO2 , mmHg

176.7 ± 48.3

179.3 ± 50.0

175.2 ± 61.9

0.967

PaCO2 , mmHg

42.2 ± 5.3

43.8 ± 4.4

45.1 ± 5.1

0.147

Base excess, mmol/L

1.0 ± 2.9

0.7 ± 2.9

0.6 ± 3.0

0.899

  1. Results are expressed as mean ± SD. PS, pressure support; PaO2, partial pressure of oxygen in arterial blood; PaCO2, partial pressure of carbon dioxide in arterial blood.