| from outside a patient | 5 | other |
| catheter → be → operated | 9 |
| catheter → be → performed | 9 |
| catheter → perform → surgical procedure | 3 |
| negative | neutral | positive |
| 0.082 | 0.872 | 0.046 |
| Raw frequency | 21 |
| Normalized frequency | 0.324 |
| Modifier score | 0.500 |
| Perplexity | 143.151 |