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Training and evaluating spinal surgeons: the development of novel performance measures
Sarah I Woodrow1, Adam Dubrowski, Mykola Khokhotva
1Department of Surgery and Wilson Centre for Research in Education, University of Toronto, Toronto, Ontario, Canada.
Spine
|February 5, 2008
Summary
This study developed new measures to assess spine surgeon technical skills during lumbar pedicle cannulation. Four key variables effectively differentiate novice from expert surgeons, aiding surgical training and competence evaluation.
Area of Science:
- Spine Surgery
- Surgical Education
- Surgical Skills Assessment
Background:
- Growing demand for objective measures of surgical competence in spinal surgery.
- Limited research on technical skills assessment in this field.
- Need for validated tools to evaluate surgical proficiency.
Purpose of the Study:
- To develop and validate novel assessment measures for lumbar pedicle cannulation.
- To establish objective criteria for evaluating surgical skills in spine surgery trainees.
- To identify key performance indicators differentiating novice and expert surgeons.
Main Methods:
- A cohort study involving 12 novice and 7 expert spine surgeons performing lumbar pedicle cannulation on a synthetic model.
- Utilized electromagnetic markers and force plates to record hand/arm movements and applied forces.
- Evaluated wrist motion, forces, task time, cannulation angles, and pedicle breaches.
Main Results:
- Novice surgeons used less mean force but took significantly longer for cannulation.
- Novices exhibited a higher mean number of far lateral pedicle breaches compared to experts.
- No significant differences were observed in the angles of pedicle cannulation between groups.
Conclusions:
- Four validated variables (3 process, 1 outcome) distinguish novice from expert performance in lumbar pedicle cannulation.
- These measures demonstrate construct validity for assessing surgical competence.
- Findings can inform objective evaluation and targeted feedback in surgical training.
