Clinical Study
The Rapid TEG α-Angle May Be a Sensitive Predictor of Transfusion in Moderately Injured Blunt Trauma Patients
Table 6
Prediction of transfusion by CCT, Rapid TEG*, and Kaolin TEG*.
| | | Cut-offs | Sensitivity | Specificity | PPV | NPV | AUC |
| | Single indicator | | INR | | >1.2 | 38% | 88% | 57% | 77% | 73% | | INR | | >1.5 | 19% | 96% | 67% | 74% | 73% | | aPTT (sec) | | >60.0 | 5% | 98% | 50% | 69% | 74% | | Fibrinogen (g/L) | | <3.0 | 90% | 48% | 43% | 92% | 74% | | Thrombin time [sec] | | >13.2 | 48% | 73% | 45% | 75% | 53% | | Rapid K (min) | | >1.8 | 68% | 78% | 61% | 83% | 79% | | Kaolin K (min) | | >1.7 | 68% | 59% | 46% | 78% | 67% | | Rapid α-Angle (deg) | | <74.7 | 84% | 57% | 49% | 88% | 77% | | Kaolin α-Angle (deg) | | <58.5 | 72% | 61% | 47% | 82% | 66% | | Rapid MA (mm) | | <59.6 | 68% | 80% | 63% | 83% | 75% | | Kaolin MA (mm) | | <58.4 | 56% | 88% | 70% | 80% | 70% | | Rapid TMA (min) | | >17.3 | 76% | 57% | 46% | 83% | 69% | | Kaolin TMA (min) | | >24.7 | 64% | 63% | 46% | 78% | 58% | | Rapid G (d/sc) | | <7374 | 68% | 78% | 61% | 83% | 73% | | Kaolin G (d/sc) | | <7073 | 56% | 88% | 70% | 80% | 70% |
| | Combined indicators | | α-Angle + Heart Rate | Rapid α-Angle (deg) | <75 | 84% | 75% | 62% | 90% | — | | Heart Rate (bpm) | >75 | | α-Angle + Hct | Rapid α-Angle (deg) | <75 | 88% | 73% | 61% | 93% | — | | Hct (%) | <41 |
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*Cut-offs determined by the data.
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