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A novel flexible hyper-redundant surgical robot: prototype evaluation using a single incision flexible access pelvic application as a clinical exemplar

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Abstract

Introduction

The flexible endoscope is increasingly being considered as a surgical tool to enable innovative natural orifice or flexible access techniques. These experiences have exposed unique advantages but also significant challenges. Major current technical drawbacks in this setting relate to uncontrolled flexibility, inaccurate sustained target localization, unreliable navigation and overall platform instability. In striving to address existing technical limitations, this paper introduces a novel flexible hyper-redundant surgical robot and evaluates its clinical potential using a focused clinical application.

Method

To assess utility of the device within tight confines of the human pelvis or peritoneal cavity, detailed laboratory workspace analysis experiments were undertaken using a computer-simulated model that incorporated anatomical data obtained via pelvic magnetic resonance images of eight women. Ten participants executed ninety usability and reliability trials on an ex vivo simulator, before the robot was repeatedly trialled in an in vivo porcine model.

Results

The robot demonstrated capability of targeting >90 % of the anatomic region of interest. All 90 user trials were successfully performed without interruption or malfunction. Significant improvements in performance, time and motion were observed between first and last sets of trials (p = 0.001). In vivo feasibility testing affirmed robustness of the device when deployed within the physiological demands of a live scale appropriate model.

Conclusion

Technologically advanced flexible operative platforms are needed to fulfil aspirations for an introductory era of flexible access surgery. This prototype is proposed as a potential future platform for robot-assisted flexible endoscopic surgery. Encouraging pre-clinical feasibility results are demonstrated for diagnostic and therapeutic applications within the pelvis.

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Acknowledgments

This work was funded by a Wellcome Trust Strategic Translation Award (083689). We gratefully acknowledge the assistance of Northwick Park Institute for Medical Research (NPIMR) for trial arrangement.

Diaclosures

James Clark, David P Noonan, Valentina Vitiello, Mikael H Sodergren, Christopher J Payne, Thomas P Cundy, and Ara Darzi have no conflicts of interest or financial ties to disclose.

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Authors and Affiliations

  1. Department of Surgery and Cancer, The Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation, Imperial College London, 3rd Floor Paterson Centre, South Wharf Road, Paddington, London, W2 1PF, UK

    James Clark, David P. Noonan, Valentina Vitiello, Mikael H. Sodergren, Jianzhong Shang, Christopher J. Payne, Thomas P. Cundy, Guang-Zhong Yang & Ara Darzi

Authors
  1. James Clark
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  2. David P. Noonan
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  3. Valentina Vitiello
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  4. Mikael H. Sodergren
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  5. Jianzhong Shang
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  6. Christopher J. Payne
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  7. Thomas P. Cundy
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  8. Guang-Zhong Yang
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  9. Ara Darzi
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Corresponding author

Correspondence to James Clark.

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Clark, J., Noonan, D.P., Vitiello, V. et al. A novel flexible hyper-redundant surgical robot: prototype evaluation using a single incision flexible access pelvic application as a clinical exemplar. Surg Endosc 29, 658–667 (2015). https://doi.org/10.1007/s00464-014-3716-2

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  • DOI: https://doi.org/10.1007/s00464-014-3716-2

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