World's first internally motorized minimally invasive surgical robotic system

A NSRS with surgical robotic arms that are driven by internal micro-motors and capable of up to 10 degrees of freedom in movement has been developed and successfully utilisedin three consecutive animal surgical experiments.

03/08/2016

 
Photo: Asian physician is using a surgical robot

Animal trials using the NSRS prototype were carried out successfully; ©Hong Kong Polytechnic University

Initiated by Prof. Yeung Chung-Kwong, Honorary Clinical Professor, Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong (HKU), a team of experienced engineers led by Prof. Yung Kai-Leung, Professor and Associate Head of the Department of Industrial and Systems Engineering of The Hong Kong Polytechnic University (PolyU) was invited to develop the system as an engineering partner since 2012. Through applying Prof. Yung's expertise in making precision instrument in space, and with important input of expertise in robotic surgery from Prof. Yeung, the team has made the breakthrough possible recently.

A NSRS with surgical robotic arms that are driven by internal micro-motors and capable of up to 10 degrees of freedom in movement has been developed and successfully utilized in three consecutive animal surgical experiments by Prof. Law Wai-Lun, the Anthony and Anne Cheung Professor in Innovative and Minimally Invasive Surgery, Clinical Professor, Director of Surgical Skills Centre, Department of Surgery, and Associate Dean of Li Ka Shing Faculty of Medicine, HKU together with Yeung. This innovative project is funded by NISI (HK) Limited (NISI), a company specializing in non-invasive surgical innovations, and supported by the Innovation and Technology Commission of the Hong Kong SAR Government.

Currently there is only one dominant surgical robotic system on the market. The system is expensive and has many limitations, including the need for multiple incisions, lack of haptic (force or tactile sensation) feedback, and bulkiness. Furthermore, it is not designed for natural orifice (NOTES, or incision-less) robotic surgery. By contrast NSRS, the new robotic system, can be inserted through a single, small incision or even a natural orifice and expanded inside the human body to perform various surgical operations.

Compared with currently available surgical robots, which require multiple (3-6) abdominal incisions, NSRS has fully internally motorized surgical arms which can enter the human body through one tiny incision, or even a natural orifice, for various abdominal or pelvic surgical operations. Since the robotic arms are driven by custom-made micro-motors adjacent to the end-effectors, they can operate with high precision and provide a good sensation of the force applied (haptic feedback). NSRS is the first robotic system in the world with arms having in-vivo motors that are both small enough and able to generate sufficient force to perform various surgical operations inside the human body, paving the way for future non-invasive surgery.

Three consecutive successful animal surgical experiments using the NSRS prototype were carried out at the Surgical Skills Centre, Department of Surgery, Li Ka Shing Faculty of Medicine, HKU since December 2015. In the most recent successful experiment, robotic cholecystectomy was successfully completed within one hour in a live pig with NSRS. "It is our belief that by integrating cutting-edge technologies with the surgical robotic platform we can make future robotic surgery much safer and less invasive, thus providing significantly better care for our patients", said Yeung. Law added, "We will continue to test the new robotic system in animal and cadaver models for more complicated procedures, using a single-incision and natural orifice approach. Our objective is to apply this system to various robotic surgeries in human in the near future."

MEDICA-tradefair.com; Source: The Hong Kong Polytechnic University

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