Table 4.
Surgical complications in magnetic-seed- and wire-guided surgery
| Magnetic seed (n = 946) | Wire (n = 1170) | Total (n = 2116) | P* | |
|---|---|---|---|---|
| Perioperative complications/localization | n = 902 | n = 1163 | n = 2065 | |
| None | 891 (98.8) | 1127 (96.9) | 2018 (97.7) | 0.132 |
| Magnetic seed/wire dislodged from lesion | 4 (0.4) | 16 (1.4) | 20 (0.9) | 0.039 |
| Index lesion/clip not visible on specimen Xrays | 4 (0.4) | 9 (0.8) | 13 (0.6) | 0.406 |
| Procedure abandoned, further localization required | - | - | - | - |
| Other | 3 (0.3) | 11 (0.9) | 14 (0.7) | 0.106 |
| Unknown | 44 | 7 | 51 | |
| Postoperative complications/surgery | n = 946 | n = 1170 | n = 2116 | |
| Seroma requiring aspiration | 14 (1.5) | 25 (2.1) | 39 (1.8) | 0.264 |
| Haematoma requiring aspiration in clinic | 3 (0.3) | 8 (0.7) | 11 (0.5) | 0.364 |
| Haematoma requiring surgical evacuation | 3 (0.3) | 4 (0.3) | 7 (0.3) | 1.000 |
| Minor wound infection (oral antibiotics) | 14 (1.5) | 27 (2.3) | 41 (1.9) | 0.170 |
| Major wound infection (IV antibiotics) | 3 (0.3) | 7 (0.6) | 10 (0.5) | 0.527 |
| Major wound infection (drainage/debridement) | 1 (0.1) | 4 (0.3) | 5 (0.2) | 0.388 |
| In-hospital complication including systemic complications such as DVT/PE/MI | 6 (0.7) | 4 (0.3) | 10 (0.5) | 0.349 |
| Unexpected readmission to hospital within 30 days† | 7 (0.8) | 11 (1) | 18 (0.9) | 0.676 |
| Readmission directly related to the localization procedure | ||||
| Reoperation within 30 days‡ | 29 (3.2) | 53 (4.6) | 82 (4) | 0.119 |
| Complications directly related to localization device (magnetic seed or wire)§ | 2 (0.2) | 2 (0.2) | 4 (0.2) | 1.000 |
Values in parentheses are percentages. *All were done using Chi squared test. †Unknown data in 50 magnetic seed and 18 wire. ‡Unknown data in 51 magnetic seed and 19 wire. §Unknown data in 49 magnetic seed and 19 wire. IV, intravenous; DVT, deep venous thrombosis; PE, pulmonary embolism; MI, myocardial infarction.