Surgical procedures
| Factor | Serratus block (n=49), (%) | Paravertebral block (n=51), (%) |
| Lumpectomy with axillary lymph node biopsy | 32 (65) | 29 (57) |
| Lumpectomy with axillary lymph node dissection | 3 (6) | 2 (4) |
| Breast reconstruction | 12 (25) | 12 (24) |
| Breast reduction | 2 (4) | 4 (8) |
| Breast implant insertion/exchange | 11 (22) | 8 (16) |
Some patients underwent multiple procedures during their surgery.