| Event description | Harm |
| Blood loss and transfusion | E |
| Postoperative ileus | E |
| Small bowel nicked in surgery | E |
| Pneumothorax at pacemaker insertion | E |
| Blood loss at pacemaker insertion | E |
| PVCs treated in PACU | E |
| Desaturation | E |
| Atelectasis and pleural effusion | E |
| Elevated blood pressure treated in PACU | E |
| Intraoperative bleeding | E |
| Postoperative infection | E |
| Foot drop | F |
| Abdominal pain, diarrhoea, ileus | F |
| Infection | F |
| Exploration and seroma | F |
| Thoracentesis | F |
| Stroke | G |
| Fistula | H |
| Re-thrombosis | H |
| Respiratory, return to operating theatre | H |
| Postoperative renal failure, congestive heart failure, death | I |
PACU, postanaesthesia care unit; PVC, premature ventricular contraction.