| Reason | No. (%) of surgeons |
|---|---|
| Half life/duration of surgery | 198 (75) |
| Estimated blood loss/IV fluid dilution | 54 (21) |
| Hospital guidelines | 24 (9.1) |
| Referred to literature | 19 (7.2) |
| Wound size, procedure type, case complexity | 15 (5.7) |
| Ambient instrument contamination because of case length | 7 (2.7) |
| Making a second incision | 3 (1.1) |