Table 3 |
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Patient subgroups defined by different ranges of lung weightsa |
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Patient subgroups |
Atelectasis (≤ reference range) |
Above reference range |
Consolidation |
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|
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Definition |
Mlung ≤1,164 g |
Mlung >1,164 g |
Mlung >1,380 g |
|
Number of patientsb |
46 (59%) |
32 (41%) |
17 (22%) |
|
Median agec, yr |
45 (32 to 53) |
28 (17 to 46) |
21 (17 to 48) |
|
Median PaO2/FiO2ns, mmHg |
184 (128 to 252) |
136 (78 to 238) |
132 (68 to 230) |
|
Median Lung Injury Scoree |
2.3 (1.6 to 2.6) |
2.7 (2.3 to 3.3) |
3.0 (2.3 to 3.3) |
|
Median Injury Severity Scorens |
34 (29 to 45) |
41 (28 to 50) |
36 (25 to 50) |
|
Median AIS-T scoreb |
4 (4 to 4) |
4 (4 to 4) |
4 (4 to 4) |
|
Median Thoracic Trauma Severity Scorens |
11 (8 to 14) |
12 (9 to 15) |
12 (11 to 15) |
|
Median Glasgow Coma Scale scoree |
14 (10 to 15) |
6 (3 to 12) |
7 (3 to 15) |
|
Median volume of intravenous fluids ns, ml |
2,000 (1,000 to 3,000) |
2,000 (1,500 to 2,875) |
2,500 (1,500 to 3,000) |
|
Median time to CTns, min |
135 (90 to 220) |
112 (90 to 177) |
131 (103 to 227) |
|
Median ventilator-free daysd |
19 (10 to 25) |
15 (0 to 19) |
15 (0 to 19) |
|
Median ICU-free daysc |
14 (2 to 22) |
1 (0 to 13) |
5 (0 to 14) |
|
Median Vlunge, ml |
2,832 (2,226 to 3,669) |
3,812 (3,134 to 4,696) |
3,696 (3,019 to 4,668) |
|
Median Mlungb, g |
899 (787 to 1,048) |
1,398 (1,265 to 1,972) |
1,930 (1,461 to 2,065) |
|
Median Mnone, % |
16 (10 to 25) |
34 (18 to 52) |
40 (33 to 57) |
|
|
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aAll values are given as medians with interquartile ranges. Atelectasis, patients with lung weights (Mlung) within the reference interval (that is, 584 to 1,164 g) for normal Mlung; above reference, patients with Mlung values exceeding the upper limit of the reference interval (that is, 1,164 g); consolidation, patients with Mlung values exceeding the lower limit of the 95% confidence interval of the mean Mlung values reported for patients with acute lung injury (that is, 1,380 g [10]); PaO2/FiO2, ratio of arterial partial pressure of oxygen to fraction of inspired oxygen; AIS-T, Abbreviated Injury Scale of the Thorax; time to CT, interval between trauma and computed tomography (CT); ventilator-free days, number of days without mechanical ventilation within a period of 28 days; ICU, intensive care unit; ICU-free days, number of days without ICU treatment within a period of 28 days; Vlung, total lung volume; Mlung, total lung mass; Mnon, percentage mass of nonaerated lung compartment (percentage of Mlung value); ns, not significant. bNo statistical test performed. cP < 0.05, dP < 0.001 and eP < 0.01, respectively, for the Kruskal-Wallis test over all groups. |
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Reske et al. Critical Care 2011 15:R71 doi:10.1186/cc10060 |
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