Comprehensive metrics for evaluating surgical microscope use during tympanostomy tube placement

Area of Science:

• Medical Simulation
• Surgical Training
• Otolaryngology

Background:

• Surgical microscope proficiency is crucial for otolaryngology trainees.
• Current methods for teaching and assessing microscope skills lack objectivity.
• Tympanostomy tube placement is a common procedure requiring precise microscope control.

Purpose of the Study:

• To implement objective metrics for evaluating surgical microscope use.
• To establish construct validity for these novel performance metrics.
• To differentiate between novice and expert microscope handling skills.

Main Methods:

• A prospective cohort study involving otolaryngology trainees and experts.
• Participants performed tympanostomy tube insertion on cadaveric models.
• Microscope movements were tracked in 3D space; video recordings were analyzed using operational metrics.

Main Results:

• Key discriminatory tracking metrics included total completion time, operation time, still time, and jitter.
• Several operational metrics related to positioning, optics, and procedure also differentiated groups.
• Metrics effectively distinguished between trainee and expert performance levels.

Conclusions:

• Objective performance metrics were successfully implemented and validated.
• These metrics can form the basis for automated feedback systems in surgical simulators.
• The findings support the development of standardized methodologies for surgical microscope training and evaluation.