Table 1 Task, the feedback given and the proficiency level to be met
Task | Feedback | Proficiency Level | |
|---|---|---|---|
1 | Identify the 4 relevant structures represented at a point in the axilla | Number of structures correctly identified | All four structures identified |
2 | Follow the course of two of these structures (median and ulnar nerves) from axilla towards the elbow, while keeping the structures in the centre of the virtual ultrasound screen | The amount (%) of the structure represented in the middle of the virtual ultrasound as a proportion of the total length of the structure (from axilla to elbow) (out of 100%) | Mean expert performance |
3 | Advance a virtual needle towards a specified target (median nerve) keeping the needle in plane during advancement | The proportion (%) of needle advancement which occurred "in plane" as a proportion of the total distance the needle tip advanced in the virtual arm | Mean expert performance |
4 | Trigger a virtual injectate at an appropriate distance from the target. | The distance from the needle tip to the target structure when injection triggered | Injection at a distance not less than the mean expert minimum distance and not more than the mean expert maximum distance. Needle tip must also be visualized at the time of triggering. |