A quantitative scale to define endoscopic torque control during natural orifice surgery.

Area of Science:

• Minimally Invasive Surgery
• Surgical Technology
• Medical Simulation

Background:

• Interest in Natural Orifice Translumenal Endoscopic Surgery (NOTES) is growing due to its minimal patient impact.
• Effective endoscope control in the extralumenal space is a critical challenge in NOTES procedures.
• Quantitative assessment of endoscopic torque control is needed to evaluate surgeon performance.

Purpose of the Study:

• To develop and validate a method for quantitatively assessing endoscope torque control during NOTES.
• To establish a performance metric based on endoscopist wrist movements.

Main Methods:

• Fourteen endoscopists completed a simulated NOTES navigational task.
• Optical motion tracking recorded wrist movements during the task.
• Movement patterns were analyzed and scored by independent assessors.

Main Results:

• Distinct patterns of wrist movements were identified, differentiating purposeful from random actions.
• The assessment tool demonstrated substantial inter-rater reliability (kappa 0.637-0.751).
• High internal consistency (Cronbach's alpha 0.948) was observed.

Conclusions:

• Extrapolated wrist movement patterns provide a viable method for measuring endoscope torque control.
• This technique can quantitatively assess performance in translumenal navigation tasks.
• The findings support the use of this method for evaluating skills in NOTES procedures.