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Design, development and characterization of a modular end effector for MIS procedures

The Minimally Invasive Surgery (MIS) paradigm is well established in modern surgical procedures. Although MIS is successful from the patient's viewpoint, the use of rigid instruments inserted through small skin incisions leads to dexterity constraints and loss of degree of motion. Robotics has been introduced as support for augmenting dexterity during interventions, restoring hand-eye coordination and providing tools with enhanced degrees of motion. However, surgical robots have high costs and large footprint, pushing the research towards the development of modular robots to be used in Naturally Orifice Trans-luminal Endoscopic Surgery (NOTES) procedures. The main need of having simple and cheap tools able to be interchanged during the surgical procedure became crucial. In this paper an innovative modular end-effector based on a compliant soft actuation system able to provide up to 5.78 N gripping forces is presented.