Table 1 Items of the thorax trauma severity score (TTSS) [8]
Grade | PaO2/FiO2 | Rib fractures | Lung contusion | Pleura | Age | Points |
|---|---|---|---|---|---|---|
0 | > 400 | 0 | No | No | < 30 | 0 |
I | 300–400 | 1–3 | Unilobar unilateral | Pneumothorax | 30–41 | 1 |
II | 200–300 | 3–6 (will use 4 to 6) unilateral | Unilobar bilateral or bilobar unilateral | Hemothorax or hemo/pneumothorax unilateral | 42–54 | 2 |
III | 150–200 | > 3 bilateral | Bilateral < 2 lobes | Hemothorax or hemo/pneumothorax bilateral | 55–70 | 3 |
IV | < 150 | Flail chest | Bilateral ≥ 2 lobes | Tension pneumothorax | > 70 | 5 |