Table 3.
Bedside calculation of safe contrast thresholds using the integer scoring system for NCDR risk model.
| Factors in Model | Points | Total Score | AKI Risk | Average Total Contrast Volume Threshold | |
|---|---|---|---|---|---|
| 10% Risk Reduction | 15% Risk Reduction | ||||
| Age (years) | 20–24 | 7–9% | 129ml | 93ml | |
| <50 | 0 | 25–29 | 9–12% | 124ml | 88ml |
| 50–59 | 2 | 30–34 | 12–16% | 116ml | 79ml |
| 60–69 | 4 | 35–39 | 17–22% | 101ml | 62ml |
| 70–79 | 6 | 40–44 | 22–28% | 84ml | 47ml |
| 80–89 | 8 | 45–49 | 28–35% | 65ml | 40ml** |
| >90 | 10 | 50–55 | 35–43% | 48ml | 40ml** |
| Prior 2-weeks HF | 11 | >55 | >43% | 40ml** | 40ml** |
| Estimated GFR (ml/min/1.73m2) | |||||
| Severely Low (<30) | 18 | ||||
| Moderate Low (31–45) | 8 | ||||
| Mildly Low (46–60) | 3 | ||||
| Diabetes | 7 | ||||
| Prior HF | 4 | ||||
| Prior CVD | 4 | ||||
| NSTEMI/UA | 6 | ||||
| STEMI | 15 | ||||
| Cardiogenic Shock | 16 | ||||
| Cardiac Arrest | 8 | ||||
| Anemia (Hb <10g/dL) | 10 | ||||
| IABP | 11 | ||||
**
Full reduction not possible due to lower bound limit of 40ml