| Abnormal Manipulation | Degree of Danger [5 Point System] | |||
| Surgeon A | Surgeon B | Surgeon C | Total | |
| Posture | 3 | 3 | 3 | 9 |
| Grasp | 3 | 5 | 5 | 13 |
| Pull | 5 | 4 | 5 | 14 |
| Sudden | 3 | 5 | 5 | 13 |
| Straining | 3 | 5 | 3 | 11 |