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  • Microsurgical Robotic System (MM-3) for Super-micro-anastomosis: Development and experiments

    Final Number:

    Akio Morita MD PhD; Mamoru Mitsuishi PHD; Naohiko Sugita D Eng.; Kanako Harada D Eng.; Shigeo Sora MD

    Study Design:
    Laboratory Investigation

    Subject Category:

    Meeting: Congress of Neurological Surgeons 2012 Annual Meeting

    Introduction: Medical robotics and engineering have great potential in improving future medical technology. In performing super-micro-anastomosis, there are potential technical limits due to tremor and dexterity in human hands. In our laboratory, we have developed microsurgery robotic system which enabled anastomosis even smaller than 0.3mm vessels.

    Methods: In our medic-engineering laboratory, we have developed 3rd prototype of microsurgical robotic system1). This system consists of master-slave control system. Slave system includes 2 micromanipulator 13cm long and with 6degrees of freedom. Forceps part can be sterilized and attached to the motorized portion. Surgical view is captured with high vision camera and presented in 3-dimensional viewer to the operator. Using this system, micro-anastomosis of artificial vessels 0.3~1mm was performed and the result was compared to microsurgery with 2 experienced neurosurgeons who had performed more than 50 actual microsurgical anastomosis. Learning curve of the system was explored with 3 engineer students who never experienced micro-anastomosis.

    Results: Our robotic system made possible for operators to place 4 stitches to 0.3mm artificial vessels constantly and was superior to the ability of experienced surgeons while the robotic system required much longer to place one stitch (5 minutes). The learning curve was very quick (<1hour) to learn micro-anastomosis.

    Conclusions: Medical engineering has great potential in improving future care including surgical education. Our prototype microsurgical robotic system enabled super-micro-anastomosis constantly which will improve results and future education in neurosurgery, plastic surgery and other microsurgical specialty requiring high level dexterity.

    Patient Care: To know the possibility of futre advance in surgical technique. FOr tpatients, this system enables very difficulut surgery safe and secure in future.

    Learning Objectives: To know the future possibility of neurosurgical technique.

    References: 30. Morita A, Sora S, Mitsuishi M, Warisawa S, Surman K, Asai D, Baba S. Mochizuki R, Kirino T: Microsurgery robotic system for the deep surgical field. Development and feasibility study in animal and cadaveric models. J Neurosurg 103:320-327,2005 55. Yonemura,T., Kozuka,Y., Baek,Y.M., Sugita,N., Morita,A., Sora,S., Mochizuki,R., Mitsuishi,M.:Comparison of pose correspondence methods of master-slave manipulators for neurosurgical robotic system, , International Journal of Automation Technology, Vol.5, No.5, pp.738-745, 2011.

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