Comparison of clinical outcomes with and without tourniquet placement
| TQ+ (n=69) | TQ− (n=69) | P value | |
| HR, mean (SEM), bpm | 110 (4) | 100 (3) | 0.02 |
| SBP, mean (SEM), mm Hg | 126 (4) | 130 (3) | NS |
| Hematocrit, mean (SEM), % | 37.0 (0.9) | 37.8 (0.6) | NS |
| MESS, mean (SEM) | 5.8 (0.3) | 5.1 (0.3) | 0.03 |
| Received transfusion in the first 24 hours, n (%) | 46 (67) | 33 (48) | 0.03 |
| pRBCs, mean (SEM), units | 3.5 (0.5) | 2.7 (0.8) | NS |
| Initial amputation, n (%) | 16 (23) | 4 (6) | <0.01 |
| Delayed amputation, n (%) | 6 (9) | 7 (10) | NS |
| Rhabdomyolysis, n (%) | 15 (22) | 12 (17) | NS |
| Compartment syndrome, n (%) | 1 (1) | 2 (3) | NS |
| Acute kidney injury, n (%) | 4 (6) | 2 (3) | NS |
| Ventilator-free days, mean (SEM), 30 days | 27.7 (0.6) | 28.3 (0.6) | NS |
| ICU-free days, mean (SEM), 30 days | 25.8 (0.7) | 26.7 (0.6) | NS |
| Hospital-free days, mean (SEM), 30 days | 17.4 (1.2) | 20.1 (1.0) | NS |
| Death, n (%) | 0 (0) | 2 (3) | NS |
HR, heart rate; ICU, intensive care unit; MESS, Mangled Extremity Severity Score; NS, not significant; SBP, systolic blood pressure; TQ+, with prehospital tourniquet; TQ−, without tourniquet placement; bpm, beats per minute; pRBCs, packed red blood cells.