Abstract
Purpose
Surgeons conventionally assume the optimal viewing position during 3D laparoscopic surgery and may not be aware of the potential hazards to team members positioned across different suboptimal viewing positions. The first aim of this study was to map the viewing positions within a standard operating theatre where individuals may experience visual ghosting (i.e. double vision images) from crosstalk. The second aim was to characterize the standard viewing positions adopted by instrument nurses and surgical assistants during laparoscopic pelvic surgery and report the associated levels of visual ghosting and discomfort.
Methods
In experiment 1, 15 participants viewed a laparoscopic 3D display from 176 different viewing positions around the screen. In experiment 2, 12 participants (randomly assigned to four clinically relevant viewing positions) viewed laparoscopic suturing in a simulation laboratory. In both experiments, we measured the intensity of visual ghosting. In experiment 2, participants also completed the Simulator Sickness Questionnaire.
Results
We mapped locations within the dimensions of a standard operating theatre at which visual ghosting may result during 3D laparoscopy. Head height relative to the bottom of the image and large horizontal eccentricities away from the surface normal were important contributors to high levels of visual ghosting. Conventional viewing positions adopted by instrument nurses yielded high levels of visual ghosting and severe discomfort.
Conclusions
The conventional viewing positions adopted by surgical team members during laparoscopic pelvic operations are suboptimal for viewing 3D laparoscopic displays, and even short periods of viewing can yield high levels of discomfort.
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Acknowledgments
Laparoscopic displays were provided to us by Olympus Japan for the purpose of independent research. Dr. Sakata received financial assistance from the Avant Doctors in Training PhD Scholarship. The funding source had no role in study design, data collection, analysis or interpretation, report writing or the decision to submit this paper for publication.
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All authors declare no conflict of interest, financial or otherwise.
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The study was approved by the University of Queensland (UQ) Human Research Ethics Committee.
Contributions
Dr. Sakata led the conceptualization, planning, execution of this research, analysis and writing the manuscript; Drs. Grove, Hill, Watson and Stevenson contributed to the planning, analysis and manuscript writing.
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Sakata, S., Grove, P.M., Hill, A. et al. The viewpoint-specific failure of modern 3D displays in laparoscopic surgery. Langenbecks Arch Surg 401, 1007–1018 (2016). https://doi.org/10.1007/s00423-016-1495-z
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DOI: https://doi.org/10.1007/s00423-016-1495-z