Group comparison of patient groups with detected or missed PTX in eFAST examination
| Parameter | PTX total (N=106) | PTX detected (n=63) | PTX missed (n=43) | p Value |
| Age (years) | 48.6±19.3 | 51.6±18.5 | 44.3±19.8 | 0.053 |
| Gender (male) | 82 (77.4%) | 49 (77.8%) | 33 (76.7%) | 0.901 |
| Weight (kg) | 81.6±14.4 | 84.4±14.9 | 76.8±12.8 | 0.132 |
| Type of trauma | ||||
| Motorbike/car accident | 39 (36.8%) | 23 (36.5%) | 16 (37.2%) | 0.941 |
| Bicycle accident | 9 (8.5%) | 4 (6.3%) | 5 (11.6%) | 0.481 |
| Fall | 50 (47.2%) | 29 (46.0%) | 21 (48.8%) | 0.776 |
| Blunt direct trauma | 8 (7.5%) | 7 (11.1%) | 1 (2.3%) | 0.138 |
| Side of PTX (left right; bilateral) | 44 (41.5%); 51 (48.1); 11 (10.4%) | 26 (41.3%); 30 (47.6%); 7 (11.1%) | 18 (41.9%); 21 (48.8%); 4 (9.3%) | 0.684; 0.873; 0.803 |
| Location* | ||||
| Ventral | 37 (34.9%) | 33 (52.4%)* | 4 (9.3%)* | <0.001 |
| Apical | 24 (22.6%) | 7 (11.1%)* | 17 (39.5%)* | 0.001 |
| Basal | 31 (29.2%) | 12 (19.0%)* | 19 (44.2%)* | 0.005 |
| Lateral | 19 (17.9%) | 14 (22.2%) | 5 (11.6%) | 0.163 |
| Size PTX (left; right) (mm) | 23.2±18.4; 20.9±19.8 | 30.7±17.4*; 30.2±19.1* | 12.1±13.9*; 6.9±10.2* | <0.001; <0.001 |
| Medical data | ||||
| Thorax drainage | 69% (65.1%) | 56 (88.9%)* | 13 (30.2%)* | <0.001 |
| Subcutaneous emphysema | 20 (18.9%) | 15 (23.8%) | 5 (11.6%) | 0.115 |
| Invasive ventilation | 20 (18.9%) | 14 (22.2%) | 6 (14.0%) | 0.292 |
| Unstable at admission | 15 (14.2%) | 10 (15.9%) | 5 (11.6%) | 0.496 |
| Oxygen administered at admission | 94 (88.7%) | 56 (88.9%) | 38 (88.4%) | 0.644 |
| Oxygen saturation at admission (%) | 97.3±4.6 | 97.8±4.7 | 96.9±4.6 | 0.306 |
| GCS at admission | 12.3±4.5 | 12.3±4.5 | 12.4±4.4 | 0.865 |
| Surgical intervention | 41 (38.7%) | 21 (33.3%) | 20 (46.5%) | 0.166 |
*Multiple locations for each single patient are possible.
Values with statistical significance are in bold.
Mean±SD or absolute numbers (%), independent samples t-test, Mann-Whitney U, Pearson’s χ2 or Fisher’s exact tests as applicable, *p<0.05, N=106.
eFAST, extended focused assessment with sonography for trauma; PTX, pneumothorax.