Advancing Robotic-assisted Microsurgery for Access to Deep Anatomical Structures

The integration of robotic systems into microsurgery represents one of the most promising technological advances in recent years. Emerging systems offer unprecedented precision and tremor filtration. However, their clinical implementation remains limited, in part due to a gap between their perceived potential and practical realities. A realistic understanding of these limitations is crucial to guide their application and, maybe more importantly, their future development. One crucial aspect is the application of currently used systems across all anatomical regions, as users report restricted access and maneuverability in confined or deep surgical fields. Experiences of microsurgeons using microsurgical robots tend to differ from the expectations of nonusers.1 Regarding future indications for robotic microsurgery, Mayrhofer-Schmid et al1 report that, “nonusers significantly overestimated the issue of limited space in the operating field.” As active users of the Symani Surgical System (Medical Microinstruments, MMI, Calci, Italy), we believe that the nonusers’ estimation represents the actual need for improvements desired by users. Users have encountered the limitations of the currently available systems, which may still be seen as early prototypes that need to be adjusted to actual clinical need, including easier and more stable access to deeper anatomical spaces with smaller incisions, where (super)microsurgery with long instruments is particularly challenging. In line with this, users mention the improvement of the range of motion as the most important future improvement after cost reduction. Current robotic microsurgical platforms typically use paired articulated arms positioned at a fixed angle. As previously reported,2 with the patient in a supine position, the arms of the robot are suitable to access anatomical spaces such as the axilla by a limited incision, as the depth of anastomosis is approximately 5–7 cm. However, the angle of the robotic arms is fixed, which may lead to difficulties in positioning the arms in other situations, depending on surgical access, length of incision, and depth of the anastomosis, for example, in the thorax or abdomen. This is in line with the findings of Mayrhofer-Schmid et al,1 as actual users described a limited range of motion and believed narrow spaces to be a less ideal indication for the use of robotic systems. As we have gained experience with central surgical reconstructions, we believe that the benefits of the robotic systems outweigh these limitations in select cases.3,4 In these cases, it may be possible to optimize the positioning of the robot, for instance, through strategic preoperative planning, where the robot is placed in regard to other equipment such as a surgical microscope, or by tilting the operating table to compensate for the fixed angle of the robotic arms. The robotic arms can thus be adjusted within the operating site, making precise (super)microsurgical anastomoses in deeper regions much more accessible. In conclusion, we believe that future upgrades of the robotic microsurgical systems need to provide an improved range of motion, ideally with adjustable positioning of the robotic arms. A continuous dialogue among developers, early users, and the wider microsurgical community remains essential to perfect these promising clinical tools. DISCLOSURES Nicole Lindenblatt acts as consultant and scientific advisor for Medical Microinstruments (MMI). Andrea Weinzierl has no financial interest to declare in relation to the content of this article. The device discussed in this article is the Symani Surgical System (Medical Microinstruments, MMI, Jacksonville, FL).