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Table 1 Induction and model development periods

From: A long-lasting porcine model of ARDS caused by pneumonia and ventilator-induced lung injury

 

Pneumonia with VILI

Pneumonia without VILI

Injurious ventilation

P. aeruginosa inoculum

Injurious ventilation

(inoculum to pneumonia diagnosis)

Injurious ventilation

(pneumonia diagnosis to ARDS diagnosis)

ARDS (to the end of the experiment)

Protective ventilation

P. aeruginosa inoculum

Protective ventilation

(inoculum to pneumonia diagnosis)

Pneumonia

(to the end of the experiment)

ARDS

Duration (h)

3.1 ± 0.1

0.9 ± 0.1

12.0 ± 0.7

16.0 ± 2.3

46.8 ± 7.7

3.1 ± 0.2

NA

7.2 ± 1.1

82.4 ± 1.2

NA

FiO2 (%)

100.0 ± 0.0

100.0 ± 0.0

100.0 ± 0.0

100.0 ± 0.0

100.0 ± 0.0

41.3 ± 0.0

NA

40.6 ± 0.6

44.4 ± 1.1

NA

TV (mL/kg)

33.3 ± 2.4

10.5 ± 0.0

27.5 ± 1.6

25.1 ± 0.9

5.7 ± 0.2

8.1 ± 0

NA

7.8 ± 0.2

7.2 ± 0.1

NA

RR (breaths/min)

12.3 ± 0.0

20.0 ± 0.0

11.3 ± 0.9

10 ± 0.0

45.8 ± 1.0

15.4 ± 0.4

NA

16.8 ± 0.1

23.7 ± 1.1

NA

PEEP (cmH2O)

0.0 ± 0.0

3.0 ± 0.0

4.9 ± 0.0

4.9 ± 0.1

9.5 ± 0.3

4.0 ± 0.0

NA

4.3 ± 0.0

4.8 ± 0.2

NA

DP (mmHg)

27.7 ± 0.2

12.5 ± 0.0

30.1 ± 0.3

29.9 ± 0.2

17.7 ± 0.5

9.5 ± 0.5

NA

12.3 ± 0.0

13.5 ± 0.4

NA

MP

NA

10.5 ± 1.6

34.7 ± 0.8

28.35 ± 1.2

26.9 ± 1.7

5.23 ± 0.7

NA

6.65 ± 1.0

10.1 ± 0.3

NA

Ventilatory mode

PC

VC

PC

PC

VC

VC

NA

VC

VC

NA

  1. After the inoculum, a short period of protective ventilation was performed to ease bacteria engraftment. Note that this was not necessary in the other group because protective ventilation was already ongoing. Data are reported as mean ± standard error
  2. ARDS acute respiratory distress syndrome, DP driving pressure, FiO2 fraction of inspired oxygen, MP mechanical power, P. aeruginosa, Pseudomonas aeruginosa, PC pressure control, PEEP positive end-expiratory pressure, RR respiratory rate, TV tidal volume, VC volume control