Endoscopic camera rotation: a conceptual solution to improve hand-eye coordination in minimally-invasive surgery

Wentink, M.; Breedveld, Paul; Meijer, Daniëlle; Stassen, H.G.

doi:10.3109/13645700009063059

Cited by 24 publications

(18 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2). An earlier study [20] with inexperienced subjects and a similar task yielded the same result; a 90°misorientation decreased task performance as compared to a condition in which the endoscopic camera was rotated to compensate for the misorientation. Cresswell et al [3] found that 50% of the participating surgeons were unable to complete the experimental task (knot tying) under 180°misorienta-tion (i.e., reverse alignment, in which the surgeon operates ahead of the camera).…”

Section: Discussionsupporting

confidence: 78%

“…Hanna et al [8] found that task performance increases when the monitor is positioned at the level of the surgeon's hands. However, this eect was not found by Wentink et al [20].…”

mentioning

confidence: 87%

“…Depth perception is reduced due to the use of monocular, rigid endoscopes [4,6,7,9,13,14,17,18]. Hand±eye coordination is impaired due to misorientation of instrument movements and mislocation of the monitor image [1,3,7,10,20]. Misorientation is caused by a misaligned viewing perspective of the endoscope on the instruments, as a result of which instrument movements in the monitor image are dicult to control eciently (especially for novice surgeons).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Quantitative evaluation of three advanced laparoscopic viewing technologies: a stereo endoscope, an image projection display, and a TFT display

et al. 2002

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 78%

“…Hanna et al [8] found that task performance increases when the monitor is positioned at the level of the surgeon's hands. However, this eect was not found by Wentink et al [20].…”

mentioning

confidence: 87%

mentioning

confidence: 99%

See 1 more Smart Citation

Quantitative evaluation of three advanced laparoscopic viewing technologies: a stereo endoscope, an image projection display, and a TFT display

et al. 2002

Self Cite

View full text Add to dashboard Cite

show abstract

“…Changing the endoscope position introduces misalignment between the displayed and actual operative field, and hence has a negative effect on task performance [9]. Again, the benefit associated with the hand level display was more appreciable as the misalignment severity, and hence task complexity, increased.…”

Section: Discussionmentioning

confidence: 96%

Assessing the benefits of ?gaze-down? display location in complex tasks

et al. 2004

View full text Add to dashboard Cite

show abstract

“…In the literature, these effects are known to disturb the surgeon's spatial perception 1,3 and hand-eye coordination. [4][5][6] This study reports an additional effect that disturbs the visual information from the operating area: the perspective effect, which results from the use of wide-angle lenses in laparoscopes. Its possible consequences on hand-eye coordination during endoscopic manipulation are evaluated.…”

mentioning

confidence: 99%

The Perspective Effect of Wide-Angle Lenses in Laparoscopes

Wentink

Fischer²,

Dankelman³

et al. 2002

Journal of Laparoendoscopic & Advanced Surgical Techniques

Self Cite

View full text Add to dashboard Cite

INTRODUCTION IN MINIMALLY INVASIVE SURGERY (MIS), the use of small incisions to provide access and the use of an endoscope for visualization result in some limitations for the surgeon. 1,2 For example, instrument motion is mirrored because the incision acts as a pivoting point. Furthermore, in comparison with natural vision, endoscopic vision is monocular and usually presents the operating area from an unnatural viewpoint. In the literature, these effects are known to disturb the surgeon's spatial perception 1,3 and hand-eye coordination. [4][5][6] This study reports an additional effect that disturbs the visual information from the operating area: the perspective effect, which results from the use of wide-angle lenses in laparoscopes. Its possible consequences on hand-eye coordination during endoscopic manipulation are evaluated. Perspective effect definedTo provide a large field-of-view inside the abdomen, laparoscopes are equipped with a wide-angle lens. Typically, the angle of view (a in Fig. 1) is about 70 degrees. An inherent characteristic of wide-angle lenses is that they show extreme perspective; in comparison with objects farther away, objects close to the lens appear much larger than would be expected from the difference in distance. As a result, movements of an instrument in a plane not parallel to the endoscope lens (b , 90 degrees in Fig. 1) appear distorted on the monitor. Rotations of the instrument around the incision can appear as translations perpendicular to the shaft on the monitor. This effect is visualized in Figures 1 and 2 and is what we define as the perspective effect. The effect increases when the angle b decreases and when the distance between the lens Methods:Sixteen subjects repeatedly performed a standardized positioning task in a pelvi-trainer under two conditions. The subjects had no prior experience with endoscopic manipulation. In one condition, a wide-angle lens with considerable perspective distortion was used; in the other, a telephoto lens without perspective distortion was used. Task time and number of errors were measured.Results: Task time and the number of errors did not significantly increase in the condition with a wide-angle lens.Conclusions: The perspective effect did not influence task performance in endoscopic manipulation in this experiment. Subjects indicated that they even preferred the wide-angle lens because its extreme perspective improved their perception of depth.

show abstract

Endoscopic camera rotation: a conceptual solution to improve hand-eye coordination in minimally-invasive surgery

Cited by 24 publications

References 7 publications

Quantitative evaluation of three advanced laparoscopic viewing technologies: a stereo endoscope, an image projection display, and a TFT display

Quantitative evaluation of three advanced laparoscopic viewing technologies: a stereo endoscope, an image projection display, and a TFT display

Assessing the benefits of ?gaze-down? display location in complex tasks

The Perspective Effect of Wide-Angle Lenses in Laparoscopes

Contact Info

Product

Resources

About