Frequencies of the 2012 significant anaesthetic events (SAEs) reported during 6439 anaesthetic procedures. SAEs are listed by severity (critical/undesirable) and nature (process/outcome)
| *3 events; **2 events. | |
| Critical anaesthetic events | 247 |
| Process | |
| Delayed discharge from recovery | 120 |
| Readmission to operating room | 11 |
| Unplanned transfusion | 42 |
| Procedure aborted | 6 |
| Unplanned transfer to ICU | 42 |
| Total | 221 |
| Outcome | |
| Cardiac arrest | 5 |
| Death | 1 |
| Neurological complications | 1 |
| Pulmonary oedema | 10 |
| Dental trauma | 9 |
| Total | 26 |
| Undesirable anaesthetic events | 1765 |
| Process | |
| Difficult laryngoscopy | 89 |
| Difficult intubation | 68 |
| Difficult ventilation with mask | 28 |
| Failure of regional anaesthesia | 51 |
| Failure of first attempt to control upper airways | 40 |
| Oesophagal intubation | 49 |
| Total | 325 |
| Outcome | |
| Arrhythmia | 27 |
| Bronchospasm | 21 |
| Erythema/rash/pruritus* | 96 |
| Hypotension | 723 |
| Laryngeal spasm | 13 |
| Oedema (facial/quincke)** | 3 |
| Tachycardia | 27 |
| Bradycardia | 320 |
| Dyspnoea | 4 |
| Hypertension | 6 |
| Hypoxaemia | 52 |
| Nausea/vomiting | 146 |
| Pharyngeal trauma | 2 |
| Total | 1440 |