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) |
Table 1: Demographic characteristics of study subjects
|
Supine |
Prone |
Change supine to prone |
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‡ |
Table 2: Arterial blood gases and respiratory dynamics in supine and prone positions (N=27 patients)
CI=Confidence interval
*Median (Q1;Q3) presented due non-normality of the difference
†P-value from Wilcoxon signed rank test
‡ P-value from paired t-test
Tables at a glance