Simulation-based Training for Ultrasound-guided Popliteal Sciatic Nerve Block Performance: a Randomized Non-inferiority Study Comparing Direct Synchronous Feedback With Remote Asynchronous Feedback

For the use of the simulation program based on the implementation of a continuous sciatic popliteal nerve block. To achieve this, a simulation program developed by researchers from the School of Medicine of the Pontificia Universidad Católica de Chile will be used for residents from the Emergency Medicine and Critical Care specialty program.

Following approval by the institutional ethics committee, the scenario for 50 students will be prepared. The procedure room will include all the equipment required for performing the intervention, consisting of a video explaining the technique. The study will assess:

(i) Fundamentals and use of echography. (ii) Knowledge of anatomy, physiology, and pharmacology. (iii) Development of dexterity: ability to perform the procedure correctly.

The students will receive a one-hour lecture on the procedure. This assessment will consist of performing a sciatic popliteal nerve block on a simulated clinical scenario. An evaluator blinded to the study objectives will assess participants using a Global Rating Scale (GRS) and a checklist. Additionally, a third evaluator will use the GRS and the checklist remotely (asynchronous feedback).

After the evaluations, the simulation room will remain open throughout the week for students to perform up to five practice sessions. The number of movements and total procedure time will be recorded during each assessment. Students will also complete a satisfaction questionnaire and a final written test after the simulation activity and before the final assessment.