The most frequent incidents*
| *This list includes both human error and equipment failures. Note that these somewhat arbitrary categories encompass only 39% of the total database, with the remainder representing a larger variety. | |
| †See text for special nature of anesthesia machines involved. | |
| Breathing circuit disconnection | 27 |
| Inadvertent gas flow change† | 22 |
| Syringe swap | 19 |
| Gas supply problem | 15 |
| Intravenous apparatus disconnection | 11 |
| Laryngoscope malfunction | 11 |
| Premature extubation | 10 |
| Breathing circuit connection error† | 9 |
| Hypovolemia | 9 |
| Tracheal airway device position changes | 7 |