Chronology

Published Aug 9, 2026

Updated Aug 9, 2026

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Sony publicly announced the Microsurgery Assistance Robot. May 9, 2024.

Proof-of-concept experiments performed at Aichi Medical University using the prototype. Feb 2024.

Overview

The Sony Microsurgery Assistance Robot is a research prototype developed by Sony Group Corporation to assist surgeons performing microsurgery and, particularly, supermicrosurgery (procedures involving extremely small vessels and nerves).

Sony presented the prototype publicly in May 2024, at the IEEE International Conference on Robotics and Automation (ICRA 2024) in Yokohama. Unlike most surgical robots, which are designed primarily for minimally invasive surgery, Sony has focused on a very specific problem: how to make the extremely small movements required in microsurgery more precise, reproducible and accessible.

The system consists essentially of a tabletop surgeon console and a compact robotic manipulator positioned at the operating table. The surgeon’s hand and finger movements are translated into much smaller movements at the tip of the robotic instrument, with approximately 1:2 to 1:10 motion scaling. We have alreagy gone through this with Symani, but let´s review this particular device.

Importantly, this remains an R&D prototype, not a commercially available or clinically approved surgical robot.

Technical concept

The system is built around four particularly interesting technologies.

Finger-controlled manipulation. Instead of using a large conventional robotic master console, Sony has developed a small control device manipulated with the fingertips. This is an important design decision. Microsurgery does not consist exclusively of tiny movements. A surgeon may need to make an extremely small needle movement and then make a considerably larger movement to pull a suture. Increasing motion scaling indiscriminately would make the larger movements inefficient. Sony’s solution is to preserve the surgeon’s natural fingertip dexterity while using motion scaling to reduce the amplitude of the resulting robotic movements. The surgeon can operate with the hand supported on a handrest, aiming for a stable and comfortable posture.

Motion scaling. The surgeon’s movements are reproduced at approximately one-half to one-tenth of their original size at the surgical instrument tip. This provides a fundamental robotic advantage: large, controlled movements of the surgeon translate into extremely small movements of the instrument. The system therefore addresses one of the principal limitations of conventional microsurgery: the difficulty of manually controlling movements at the scale of fractions of a millimetre.

large, controlled movements of the surgeon translate into extremely small movements of the instrument. The system therefore addresses one of the principal limitations of conventional microsurgery: the difficulty of manually controlling movements at the scale of fractions of a millimetre.

Low-friction, low-latency movement. Sony has paid particular attention to the mechanical and electronic response of the robot. The robotic arm incorporates low-friction joints throughout its kinematic chain, including the very small wrist joints near the instrument tip. Sony also describes an electronic control architecture designed for low latency and lightweight mechanical components. The objective is to prevent the characteristic “robotic” feeling of delayed or jerky movement and preserve an intuitive relationship between the surgeon’s fingers and the instrument tip.  For microsurgery, this is particularly important: at this scale, even small delays or discontinuities in movement can interfere with the surgeon’s perception of the task.

Automatic instrument exchange. Perhaps the most unusual feature of the Sony prototype is its automatic instrument exchange system. Conventional robotic surgery generally requires an assistant to change instruments. In microsurgery, where multiple instruments may be required repeatedly, this can interrupt the workflow. Sony miniaturized the surgical instruments and developed a mechanism capable of storing several instruments close to the robotic arms. The instruments can then be exchanged automatically by either arm using small movements, without requiring manual intervention.  This is more than a convenience feature. At microsurgical scale, Sony is attempting to reproduce one of the advantages of conventional surgery: the surgeon can rapidly change instruments without interrupting the procedure.

4K 3D visualization. The prototype incorporates a 4K 3D stereo camera and Sony 1.3-inch 4K OLED microdisplays in the stereoscopic viewer. High-resolution stereoscopic visualization is particularly important in microsurgery because the surgeon must distinguish extremely small differences in tissue texture, colour, depth, vessel walls,  needle position, and instrument position. Sony’s display technology therefore becomes part of the surgical system rather than simply an external visualization component.

Perspective

The system is designed specifically for microsurgery and supermicrosurgery. Sony deliberately exploits the extraordinary dexterity of the human fingertips instead of replacing the surgeon’s natural hand movements with a large master console. The robot is not intended to replace the microsurgeon’s hands. It is intended to make the surgeon’s hands more precise. Therefore, it aims to the market of microsurgical robots.

For now, Sony has demonstrated technical feasibility. The next step is to demonstrate clinical value.

There is currently no commercial system, regulatory authorization or established clinical series demonstrating improved patient outcomes. However, outcomes from the currently available microsurgical robots could help drive the development of emerging systems such as Sony’s.

Prior to commencing my venture into robotic surgery, I had established a firm grounding as an oncologic surgeon. My experience encompassed a wide range of resection and reconstructive procedures, as well as proficiency in minimally invasive surgical techniques and endoscopic surgery. These acquired skills and expertise serve as fundamental pillars for achieving success in robotic surgery.

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