Table 2. Outcomes of leech therapy for congestive head and neck flaps
| No | Start (POD) | Leech/day | Duration (days) | Hemoglobin (g/dL) | Transfusion |
| Pre-therapy | Post-therapy |
| 1 | 2 | 1 | 2 | 12.2 | 11.2 | No |
| 2 | 1 | 4 | 3 | 11.6 | 7.6 | Yes |
| 3 | 3 | 2 | 2 | 8.8 | 8.0 | Yes |
| 4 | 1 | 1 | 1 | 11.0 | 8.9 | Yes |
| 5 | 1 | 2 | 2 | 11.0 | 8.8 | Yes |
| 6 | 2 | 1 | 7 | 9.6 | 8.7 | Yes |
| 7 | 1 | 1 | 3 | 14.0 | 11.1 | No |
| 8 | 1 | 2 | 5 | 11.1 | 11.8 | No |
| 9 | 1 | 2 | 2 | 14.9 | 14.5 | No |
| 10 | 1 | 1 | 2 | 14.0 | 13.8 | No |
| 11 | 2 | 2 | 2 | 10.1 | 8.0 | Yes |
| 12 | 2 | 2 | 2 | 12.9 | 10.7 | Yes |
| 13 | 2 | 2 | 2 | 10.0 | 8.1 | No |
| 14 | 1 | 2 | 3 | 13.8 | 13.2 | Yes |
| 15 | 1 | 2 | 1 | 13.5 | 12.1 | No |
| 16 | 2 | 2 | 2 | 10.7 | 10.4 | No |
| 17 | 1 | 3 | 3 | 11.3 | 7.2 | Yes |
| 18 | 2 | 2 | 8 | 11.7 | 10.6 | No |
| 19 | 1 | 2 | 3 | 9.8 | 10.0 | No |
| 20 | 1 | 2 | 2 | 10.5 | 8.9 | No |
| 21 | 1 | 2 | 1 | 12.6 | 11.4 | No |
| 22 | 1 | 1 | 4 | 12.9 | 11.4 | No |
| 23 | 1 | 1 | 8 | 9.6 | 11.5 | Yes |
| 24 | 1 | 1 | 5 | 12.8 | 14.7 | Yes |
POD: postoperative days