Idle time: an underdeveloped performance metric for assessing surgical skill

Area of Science:

• Surgical Education
• Medical Simulation
• Human Factors Engineering

Background:

• Assessing surgical skills is crucial for patient safety and effective training.
• Objective performance metrics are needed to complement subjective evaluations in surgical education.

Purpose of the Study:

• To evaluate the validity of idle time as a performance measure in open surgical skills assessment.
• To investigate the relationship between idle time, surgical experience, and task complexity.

Main Methods:

• A pilot study involving surgical attendings, residents, and medical students performing suturing tasks.
• Utilized a motion tracking system to analyze hand movements, including idle time, total operative time, and path length.
• Compared idle time across different experience levels and tissue fragility during simulated surgical procedures.

Main Results:

• A total of 365 idle periods were analyzed across all participants.
• Experienced surgeons (attendings) exhibited significantly fewer idle periods during specific procedural steps.
• Increased idle time was observed when participants operated on more challenging, friable tissue.

Conclusions:

• Idle time serves as a valid indicator of psychomotor planning skills in surgical performance.
• Idle time is influenced by both surgeon experience and the difficulty of the surgical task.
• Further research is warranted to establish idle time as a robust psychomotor assessment tool in surgery.