Subject Characteristics

N=27

Age (years) 

Mean (SD)

44.3 (16.5)

Body Mass Index (kg/m2) 

Mean (SD)

26.8 (4.9)

Gender, n (%)

Male

23 (85)

Female

4 (15)

Aetiology, n (%)

Trauma

13 (48)

Degenerative

8 (30)

Tumor

5 (19)

Infection

1 (4)

Level of Spine Injury, n (%)

Cervical 

12 (44)

Thoracic

4 (15)

Lumbar

11 (41)

Supine
Mean (95% CI)

Prone
Mean (95% CI)

Change supine to prone
Mean (95% CI)

from pValue

Arterial blood gases

PaO2(mmHg)

91.7(89.5;93.9 )

91.8(89.6;94.1)

0 (0;0)*

0.938†

HCO3(mEq/l)

22.2(21.3;23.1)

22.3(21.7;23.0)

0.1 (-0.3;0.6)

0.537‡

PaCO2(mmHg)

37.7(37.2;38.1)

38.3(37.7;38.9)

0 (0;1)*

<0.001†

Respiratory dynamics(cmH2O)

Peak Inspiratory pressure

16.0(15.1;16.9)

19.2(17.9;20.5)

3.2 (2.1;4.3)

<0.001‡

Peak plateau pressure

7.3(6.7;7.9)

9.2 (8.6;9.8)

1.9 (1.4;2.4)

<0.001‡

Dynamic lung compliance

39.1 (35.8;42.5)

29.8 (27.2;32.5)

-9.3 (-12.3;-6.3)

<0.001‡