Table 1.

The 9‐point ordinal scale used to judge the impact of observed events as adapted from [12].

Potentially distracting source, such as a pager that is not answered. Floating team member notices a distractor, such as a pager that is not answered. Floating team member attends to non‐case distractor, such as the circulating nurse answering a pager. Team member is distracted momentarily from task, such as answering a phone whereas continuing with the primary task. Team member pauses the current task, such as an operating room nurse pausing her task for a discussion. Team member attends to a distractor, such as anaesthetist answering questions about the next patient. Team is distracted momentarily: the same as 4, but now two or more team members. Team attends the distractor: the same as 6 but now two or more team members. Operation flow interrupted, such as instrument failure, halting the procedure or discussing the plan for the next case.