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Journal of Robotic Surgery

, Volume 13, Issue 3, pp 413–421 | Cite as

Evaluation of a pneumatic surgical robot with dynamic force feedback

  • Dimitrios KarponisEmail author
  • Yokota Koya
  • Ryoken Miyazaki
  • Takahiro Kanno
  • Kenji Kawashima
Original Article
  • 125 Downloads

Abstract

Robot-assisted surgery is limited by the lack of haptic feedback and increased operating times. Force scaling adjusts feedback transmitted to the operator through the use of scaling factors. Herein, we investigate how force scaling affects forces exerted in robotic surgery during simple and complex tasks, using a pneumatic surgical robot, IBIS VI. Secondary objectives were to test the effects of force scaling on operating time, depth of needle insertion and user satisfaction. Two novice males performed simple (modified block transfer) and complex (needle insertion) tasks under four scaling factors: 0.0, 0.5, 1.0 and 2.0. Single-blind experiments were repeated five times, with alternating scaling factors in random order. Increasing the scaling factor from 0.0 to 2.0 reduces forces in block transfer (p = 0.04). All feedback conditions reduce forces in needle insertion compared to baseline (0.5: p < 0.001, 1.0: p = 0.001, 2.0: p = 0.001). Time to complete block transfer is shorter for scaling factor 0.5 (p = 0.02), but not for 1.0 (p = 0.05) or 2.0 (p = 0.48), compared to baseline. Depth of needle insertion decreases consistently with incremental scaling factors (p < 0.001). Further reductions are observed upon augmenting feedback (0.5–2.0: p = 0.02). User satisfaction in block transfer is highest for intermediate scaling factors (0.0–1.0: p = 0.01), but no change is observed in needle insertion (p = 0.99). Increments in scaling factor reduce forces exerted, particularly in tasks requiring precision. Depth of needle insertion follows a similar pattern, but operating time and user satisfaction are improved by intermediate scaling factors. In summary, dynamic adjustment of force feedback can improve operative outcomes and advance surgical automation.

Keywords

Robot-assisted surgery Force feedback Force scaling Pneumatic surgical robot Block transfer Needle insertion 

Notes

Acknowledgements

The authors thank Riverfield inc. for providing the infrastructure to conduct this research.

Funding

Part of this research is based on the Cooperative Research Project of the Research Centre for Biomedical Engineering. Author-DK was supported by the JASSO scholarship.

Compliance with ethical standards

Conflict of interest

Authors DK, YK, RM, TK and KK declare that they have no conflict of interest.

Supplementary material

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Supplementary material 1 (DOCX 185 KB)
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Supplementary material 6 (DOCX 47 KB)

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Biomaterials and BioengineeringTokyo Medical and Dental UniversityTokyoJapan
  2. 2.School of MedicineImperial College LondonLondonUK

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