Spatial awareness in Natural Orifice Transluminal Endoscopic Surgery (NOTES) navigation.

Area of Science:

• Minimally Invasive Surgery
• Surgical Navigation
• Medical Device Technology

Background:

• Natural Orifice Transluminal Endoscopic Surgery (NOTES) presents unique navigational challenges.
• Operator spatial awareness is critical for safe and effective NOTES procedures.
• Characterizing navigational patterns can elucidate the relationship between spatial awareness and surgical performance.

Purpose of the Study:

• To analyze endoscope navigational patterns in the abdominal cavity during NOTES.
• To correlate spatial awareness status with navigational behavior and surgical performance.
• To investigate the hypothesis that poor spatial awareness leads to erratic navigation and reduced performance.

Main Methods:

• Electromagnetic tracking of the endoscope tip during simulated NOTES procedures in novices.
• Performance metrics included target visualization, localization time, path length, and completion time.
• Topological modeling and 2D projection of navigation traces to classify spatial awareness groups.

Main Results:

• No significant difference in path length across sessions.
• Supplemental visualization using an additional camera improved completion time (p<0.05).
• Four distinct operator spatial awareness groups were identified based on navigation footprints.

Conclusions:

• Endoscope tip tracking enables reconstruction of navigation paths and assessment of operator spatial awareness.
• Poor spatial awareness is associated with erratic maneuvers and diminished performance.
• Understanding spatial awareness is crucial for NOTES safety, training, and potential endoscope design improvements.