A new approach to laparoscopic surgery involves placing a robot completely within the patient. These in vivo robots are then able to provide visual feedback and task assistance that would otherwise require additional incisions. Wheeled in vivo robots can provide a mobile platform for cameras, graspers, and other sensory devices that assist in laparoscopy. Development of wheeled in vivo mobile robots was achieved through a design process that included modeling, finite element analysis (FEA), bench top testing, and animal tests. Laboratory testing using a wheel test platform identified a helical wheel design as the best candidate. Finite element simulations were then used to better understand how changing the helical wheel geometric parameters affected drawbar force. Several prototype mobile robots were then developed based on these results. The drawbar forces of these robots were measured in the laboratory to confirm the FEA results. Finally, these robots were successfully tested during animal surgeries.
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October 2007
Research Papers
Mechanical Design of Robotic In Vivo Wheeled Mobility
Mark E. Rentschler,
Mark E. Rentschler
University of Nebraska
, Department of Mechanical Engineering, N104 Walter Scott Engineering Center, Lincoln, NE 68588
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Shane M. Farritor,
Shane M. Farritor
University of Nebraska
, Department of Mechanical Engineering, N104 Walter Scott Engineering Center, Lincoln, NE 68588
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Karl D. Iagnemma
Karl D. Iagnemma
Massachusetts Institute of Technology
, Department of Mechanical Engineering, 77 Massachusetts Avenue, Rm 3–435A Cambridge, MA 02215
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Mark E. Rentschler
University of Nebraska
, Department of Mechanical Engineering, N104 Walter Scott Engineering Center, Lincoln, NE 68588
Shane M. Farritor
University of Nebraska
, Department of Mechanical Engineering, N104 Walter Scott Engineering Center, Lincoln, NE 68588
Karl D. Iagnemma
Massachusetts Institute of Technology
, Department of Mechanical Engineering, 77 Massachusetts Avenue, Rm 3–435A Cambridge, MA 02215J. Mech. Des. Oct 2007, 129(10): 1037-1045 (9 pages)
Published Online: October 21, 2006
Article history
Received:
July 6, 2006
Revised:
October 21, 2006
Citation
Rentschler, M. E., Farritor, S. M., and Iagnemma, K. D. (October 21, 2006). "Mechanical Design of Robotic In Vivo Wheeled Mobility." ASME. J. Mech. Des. October 2007; 129(10): 1037–1045. https://doi.org/10.1115/1.2757189
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