A history of robots: from science fiction to surgical robotics
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Surgical robotics is an evolving field with great advances having been made over the last decade. The origin of robotics was in the science-fiction literature and from there industrial applications, and more recently commercially available, surgical robotic devices have been realized. In this review, we examine the field of robotics from its roots in literature to its development for clinical surgical use. Surgical mills and telerobotic devices are discussed, as are potential future developments.
KeywordsRobot Robotics Robotic surgery Minimally invasive surgery daVinci Zeus
At the dawn of the 20th century, robots were not yet a part of popular science fiction. It was not until 1917 when Joseph Capek wrote the short story Opilec describing automats and 1921 when his brother Karel Capek wrote the play Rossum’s Univeral Robots (RUR) that the concept of robotics entered the popular consciousness [1, 2]. Which brother originally coined the term robot is a matter of debate in the Czech literary world. The term robot is derived from the Czech word, robota, meaning serf or laborer. Karl Capek intended for his play, RUR, to protest the rapid growth of modern technology and thus he described an evolution of the robots with increasing capabilities and the eventual revolt of these robots against their human counterparts . Inadvertantly, the Capek brothers introduced the term robot into modern language and sparked public fascination with their creations.
A robot may not injure a human being or through inaction allow a human to come to harm.
A robot must obey orders given it by humans except when doing so conflicts with the first law.
A robot must protect its own existence as long as this does not conflict with the first or second law.
The transition from science fiction to reality occurred in 1958 when General Motors introduced the Unimate to assist in automobile production. Since Unimate’s first use on the assembly line in 1961, the application of robotics to industry has exploded . Robots have since been used in a variety of applications including deep sea and space exploration, military use, and for search and rescue missions. In all cases, robotics has the aim of duplicating or improving upon human function or serving in roles too hazardous for direct human work.
A variety of classifications for different types of robots help to describe these heterogeneous devices. Robots can be characterized as automated arms, mobile devices, mills, or telerobotic devices. Additionally, they can be active, semiactive, or passive. Active devices are totally programmable and carry out tasks independently. One can imagine a physician entering three-dimensional (3D) computed tomography data into a computer and then programming the computer to direct a mill to remove particular areas of bone. Semiactive devices and passive robotic devices translate movements from an operator’s or surgeon’s hands into powered or unpowered movements of the robot end-effector arms. Surgical robots in use or research today include both active mills and semiactive telerobotic devices.
Active surgical robotics
The concept of remote robotic operation has long been recognized to have benefits in several different fields. Defusing bombs, surveying space and the deep sea, and treating patients on the battlefield from a safe haven behind the front include just a few potential applications. Telepresence, or the insertion of the robot operator, into a virtual-reality display emerged from these visions of potential benefit. In the 1980s the National Aeronautics and Space Administration (NASA) joined with the Ames Research Center (Palo Alto, CA, USA) to begin the development of a head-mounted virtual-reality display to allow users to immerse themselves in the large data sets that were transmitted from aerospace missions. By coupling 3D stereoscopic vision with the DataGlove (VPL Research, Inc, Redwood City, CA, USA), users could see their own interactions with a virtual world [5, 13].
The potential advantages that telepresence could provide surgeons were recognized by Scott Fisher, Ph.D. (a NASA scientist) and Joe Rosen, MD (a Stanford University, Palo Alto, CA plastic surgeon). They envisioned telepresence surgery to involve the virtual insertion of the surgeon into the operative field with the manipulation of remote robotic arms. Fisher and Rosen collaborated with Phil Green, Ph.D. of the Stanford Research Institute (now SRI International, Menlo Park, CA, USA) to develop a robotic arm. Over the next decade, the field of telerobotic surgery grew and the concept of integrating this technology into the burgeoning field of laparascopic surgery was fully realized . The concept was introduced to the Pentagon’s Defense Advanced Research Projects Agency (DARPA) with the goal of allowing a surgeon to treat a wounded soldier on the battlefield from a remote safe haven—with the surgeon’s hands controlling robotic arms on the battlefield [5, 14, 15].
Initially funded by DARPA, Computer Motion, Inc. (acquired in 2003 by Intuitive Surgical, Sunnyvale, CA, USA) developed the automated endoscopic system for optimal positioning (AESOP) system, a robotic arm for endoscopic camera control. AESOP, designed to replace a surgical assistant in laparoscopic surgery, was coupled with the Hermes voice-activation system to allow endoscope control by voice command . These devices achieved FDA approval in 1994. While the AESOP/Hermes platform was the first actively marketed telerobotic manipulators system, the devices’ most significant function was serving as the groundwork for the surgical robotic devices currently integrated into clinical practice.
The Zeus surgical system was used in 2001 for the first telepresence surgical procedure. The military’s vision for telepresence surgery was realized when the first transatlantic surgical procedure, a laparoscopic cholecystectomy, was performed on a patient in Strasbourg, France by a surgeon seated at a console 3,800 miles away in New York, United States. Utilizing a 155 ms bandwidth, the time delay between the operating surgeon’s movements and the remote instrument movement was minimized.
Since the original introduction of the daVinci surgical system, there have been several modifications. A fourth robotic arm has been added which allows the surgeon to toggle between three instruments. An increasing number of both 8 and 5 mm surgical instruments are available and the new daVinci S (Intuitive Surgical) adds an interactive video displays and more streamlined setup.
The daVinci surgical system has now been FDA approved for a variety of general, cardiac, gynecologic, and urologic procedures. Clinical data measures document equal or improved surgical outcomes with improved post-operative function, decreased blood loss, shorter hospital stays, and a favorable learning curve for newly trained robotic surgeons [16, 17, 18, 19]. Over 500 daVinci surgical systems have been installed worldwide and device use continues to increase. Procedure development in the thoracic and abdomino-pelvic surgery continues as does clinical research into applications in the upper aerodigestive tract, skull base, and soft tissues of the neck [20, 21, 22, 23].
The currently available surgical robots, in both clinical use and clinical trials offer potential advantages to truly recognize the concept of minimally invasive surgery. Robotic devices with more-streamlined platforms, smaller instrumentation, and remote telementoring will all likely be a reality in the foreseeable future.
Current and previously marketed telerobotic devices lack haptic or sensory feedback. While this technology has been the source of a great deal of research and funding, with numerous patents having been granted, it has not been applied clinically . Arguments against the need for haptic feedback include: (1) the substitution of improved optics that offer visual cues to the force-response relationships between the surgeon and the tissues, and (2) the lack of haptics in conventional endoscopic surgery, which uses long rigid instrumentation. However, the potential to improve upon current technology by the addition of haptic feedback exists and will likely continue to be a source of additional research.
While the concept of robotics began as science fiction, today robots play important roles in modern life. In the healthcare industry, surgical robotic promise to play a more integral role in the years to come. From the original concept of battlefield surgery by DARPA to the transatlantic laparoscopic cholecystectomy, great advances have been made. Following the tenets of modern and ancient medicine including clinical outcomes research and “do[ing] no harm”, robotic surgery, both with active surgical robotic mills and telerobotic manipulators, has the potential to offer patients the opportunity to optimize minimally invasive surgery.
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