2.
Rogers评估量表（VTE风险评估）
Rogers risk assessement model
| Risk factor | Risk score |
| ASA: American Society of Anesthesiologists; RBC: red blood cell; RVU: relative value unit. Low risk: < lt; 7; Moderate risk: 7-10; High risk: > 10. | |
| Operation type other than endocrine | |
| Respiratory and hemic | 9 |
| Thoracoabdominal aneurysm, embolectomy/ thrombectomy, venous reconstruction, and endovascular repair | 7 |
| Aneurysm | 4 |
| Mouth, palate | 4 |
| Stomach, intestines | 4 |
| Integument | 3 |
| Hernia | 2 |
| ASA physical status classification | |
| 3, 4 or 5 | 2 |
| 2 | 1 |
| 1 | 0 |
| Work RVU | |
| > 17 | 3 |
| 10-17 | 2 |
| < 10 | 0 |
| Female gender | 1 |
| Male gender | 0 |
| Disseminated cancer | 2 |
| Chemotherapy for malignancy within 30 d of operation | 2 |
| Preoperative serum sodium (145 mmol/L) | 2 |
| Transfusion (4 U packed RBCs in 72 h before operation) | 2 |
| Ventilator-dependent | 2 |
| Wound class (clean/contaminated) | 1 |
| Preoperative hematocrit (38%) | 1 |
| Preoperative bilirubin (> 1.0 mg/dL) | 1 |
| Dyspnea | 1 |
| Albumin (3.5 mg/dL) | 1 |
| Emergency | 1 |
| Total scores | |