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21 Current and Future Platforms for Robotic Colorectal Surgery
Fig. 21.7 Telelap ALF-X reusable instruments
303
surgeries and might require a larger operating room spatial footprint, limiting the areas of its use. Furthermore, laparoscopic stapling devices are needed, but may be easier for assistants to use with increased access to the surgical field. Currently, the Telelap ALF-X platform is only marketed in the European Union, but there are plans to apply for FDA clearance and market in the United States in the near future. SOFAR S.p.A may integrate with TransEnterix to accomplish this goal.

Telesurgery

The technological advancements in robotic surgery have made the idea of telesurgery a reality. With telesurgery, patients can acquire unique surgical expertise despite being great distances from highly specialized surgeons. The military has envisioned the use of telesurgery in forward operating bases near combat zones with limited medical staff. If telesurgery could be employed in civilian life, it could allow advanced surgi­cal care in any region with limited resources including rural communities, third world countries, and even the international space station. However, implementation of tele­surgery has been limited due to data transmission latency. Once cables are no longer used to connect the surgical console to the robot, the data must be compressed, trans­mitted, and then uncompressed at the receiving location. This creates a latency period, which can degrade surgical performance. Studies have revealed that basic tasks can be satisfactorily performed with up to a 600-ms time delay, but complex procedures have a significant increase in errors with delays greater than 300 ms [15–17]. Despite the issue with latency, Jacques Marescaux of Strasbourg, France performed the first trans­atlantic cholecystectomy on a patient in Strasbourg while sitting on a surgical console
304
J.N. Harr and D. Nagle
in New York City in 2001 [18]. Currently, telementoring is being employed allowing for colorectal surgeons to provide real-time intraoperative feedback during complex cases, but latency times and medical–legal factors have dissuaded telesurgery use in the United States. Although still limited, telesurgery continues to be explored.
Stanford Research International (SRI), who has helped pioneer robotic surgery platforms from the 1980s under contract to the U.S. Army and funding from the NIH, developed the M7 surgical robot in 1998 [19]. The current version has two anthropomorphic robotic arms, which move through 7 degrees of freedom, and in which conventional surgical tools can be swapped rapidly by a technician. The advantage of the M7 not offered by other platforms is the incorporation of auditory, visual, and tactile sensations, as well as haptic feedback. Additionally, the robotic platform software compensates for jarring or turbulence on a moving platforms (such as in vehicles, aircraft, or in space) virtually eliminating tremor. In 2006, the M7 successfully completed a real-time abdominal surgery on a patient simulator remotely in the Aquarius Underwater Laboratory 60 ft underwater off the coast of Key Largo, Florida as part of the ninth NASA Extreme Environment Mission Operations [20]. Similarly, in 2007, the M7 was used to complete basic exercises aboard a NASA C-9 aircraft simulating the microgravity of space [21]. The M7 was also used to perform the first automated ultrasound-guided tumor biopsy [20].
Another robotic platform focusing on telesurgery is the Raven, developed by physicians and scientists at the BioRobotics Laboratory affiliated with the University of Washington in 2005, and is sponsored by the Department of Defense [22]. The current version of the robot (Raven II) weighs 22 kg, and has two articulated, tendon- driven arms in which different surgical instruments can be easily exchanged. It can be easily disassembled/assembled for transport by nonengineers, and the communication links have been designed for long-distance remote control. The unique feature of this platform is that the Robot Operating System software contains a popular open-source robotics code, allowing other labs and researchers to connect the Raven II to other devices and share ideas. Other robotic labs including Harvard, Johns Hopkins University, the University of Nebraska-Lincoln, UCLA, and UC Berkeley have also received Raven II robots to further research and problem-solve the current limitations of robotic surgery. The Raven II has also been tested in underwater NASA training habitats, remote desert locations, unmanned aerial vehi­cles, as well as zero-gravity astronaut training drills [23–26].

Robotic Endoscopy

The gold standard for the diagnosis of colon and rectal disease is video- colonoscopy. This allows for direct visualization, tissue sampling for diagnosis, and interventions. However, the invasiveness of this technique, as well as patient discomfort requiring sedation, poses limitations. Subsequently, robotic platforms for colonoscopies have been proposed to address these limitations. These platforms reduce pain and possi­bly the risk of perforation by minimizing excessive stretching of the bowel, by
21 Current and Future Platforms for Robotic Colorectal Surgery
limiting air insufflation and reducing the pushing action exerted by the endoscopist. These devices also are more flexible, which decreases the distortion of the colon and also allows for a more comfortable and safer procedure. Present devices are cur­rently not employed clinically in the US, and have limited, if any, interventional capabilities. However, the next step in technological advancement is the addition of interventional capabilities, as well as with adding its concurrent use into laparo­scopic/robotic colorectal operations since current standard intraoperative colonosco­pies are burdensome due to excessive insufflation and colonic distortion.
305

Soft Colonoscopy Robotic Platform

The Vanderbilt STORM (Science and Technology of Robotics in Medicine) Lab has further developed the magnetic air capsule system first introduced by Dr. Valdastri [27]. This platform navigates an endoscopic capsule through magnetic coupling, which pulls the capsule through the colon, as opposed to a traditionally pushed endo­scope, which stretches the colonic wall generating pain [28, 29]. This device is a tethered capsule that contains an endoscopic camera, white light LEDs, a therapeutic tool channel, and air/water channels for insufflation and cleaning. The camera has a 550 × 582 pixel resolution and a 120° field of view. The small size of the capsule and the soft, flexible tether increases patient comfort, minimizing sedation. The robotic platform uses an external permanent magnet connected to a 6 degrees of freedom robotic arm with a 7th custom-degree of freedom at the end-effector increasing dex­terity to maneuver the endoscopic capsule. The robotic arm is controlled by an input device and joystick, which interacts with a real-time motion control system and pro­vides haptic feedback. This technology theoretically can reduce the physical demands of performing the procedure, expand the pool of medical personnel able to operate the system, and may allow for tele-endoscopy in rural areas or for military personnel overseas. Currently, this device is not on the market, but preclinical studies have dem­onstrated feasibility and accuracy compared to conventional colonoscopy [29].

Endotics

The Endotics (Era Endoscopy S.r.I) robotic platform was developed in Italy and uses a computer-assisted propulsion system with locomotion similar to that of an earthworm [30]. The Endotics system is composed of a sterile, disposable probe and a workstation (Fig. 21.8). The head of the probe contains a steerable tip, a vision system with a CMOS camera and LED light source, and channels for a water jet and air, as well as an instrument channel (Fig. 21.9). The body of the probe is highly flexible, conforms to the shape of the colon, and contains two vacuum­mechanical clampers that are located in the proximal and distal part of the probe. The locomotion is achieved by the coordinated adherence and release of the
306
Fig. 21.8 Endotics workstation
Fig. 21.9 Endotics disposable probe
J.N. Harr and D. Nagle
clampers to the colon mucosa and is operated by a handheld controller similar to those seen with home gaming systems. For locomotion, the operator can steer the head of the probe 180° in every direction, and then activate the forward or backward motion through an automated series of steps: the proximal clamper adheres to the mucosa and the central part of the body is elongated; the distal clamper adheres to the mucosa and the proximal clamper is released; the central part of the body is contracted so that the proximal clamper may adhere to the mucosa; and finally, the distal clamper is released. This sequence is repeated several times allowing the
21 Current and Future Platforms for Robotic Colorectal Surgery
307
probe to move in a worm-like fashion [31]. This clamping mechanism is safe and does not produce bowel wall lesions or mucosal lacerations. Early clinical studies have shown an equivalent diagnostic accuracy to the standard colonoscope, with a sensitivity of 93.3 %, and a specificity of 100 %, and no patients requested or required sedation [32, 33]. Benefits of this system are that it is safe with the dispos­able probe, eliminating the risk of cross-infection, and that it is cost effective since it eliminates costs related to perforation, cross-contamination, work-related inju­ries, sterilization and sedation, and decreases room turnover time. Furthermore, the company touts a fast learning curve with the intuitive handheld controller. However, the main limitation currently is increased colonoscopy times.

GI View Ltd.

The Aer-O-Scope™, introduced by the Israeli company GI View Ltd., uses a self­propelled pneumatic intubation system by employing balloons and low-pressure CO2 gas, and exerts ten times less pressure on the colonic wall than the standard colono­scope [34]. The Aer-O-Scope™ consists of disposable scanner, which contains an imagining capsule with a CMOS camera, and a soft, flexible cable containing channels for air, suction, and a water jet (Fig. 21.10). The imaging system provides two simulta­neous views for visualization of the colon, including a standard forward-looking view, as well as a 360° “omni-view” providing visualization ahead of the capsule, behind the
Fig. 21.10 Aer-O­Scope™ disposable probe and optical head
308
Fig. 21.11 Aer-O- Scope™ workstation
J.N. Harr and D. Nagle
capsule, and of all sides of the capsule, increasing visualization behind haustral folds, and subsequently, polyp detection rates. The disposable scanner connects to a PC-based workstation, which is equipped with an ergonomic joystick that controls navigation, insufflation, irrigation, and suction (Fig. 21.11). The computer-assisted platform receives and processes transmitted pneumatic controls and pressure measurements within the camera and scanner to safely advance and withdraw the Aer-O-Scope™ within the colon lumen. The Aer- O- Scope™ has recently received FDA 510(k) clear­ance and is expected to be introduced in the United States in 2016. The advantages of this system are with the single-use endoscope preventing cross-contamination, the low­pressure pneumatic propulsion, and the 360° visualization of the colon. The handheld joystick has an intuitive design, decreasing the learning curve, and allowing physicians to be trained in half a day [34]. Currently, there is no published data on the cost of the system or the cost effectiveness compared to traditional colonoscopy, but is expected to reduce costs by decreasing complications, allowing for quicker room turnover, and increasing polyp detection. Also, there is no published data on sedation requirements. Another limitation is the lack of a working instrument channel for biopsies and inter­ventions. However, the low-pressure CO
propulsion system and visualization capa-
2
bilities would offer several advantages for intraoperative colonoscopies.

Conclusions

Robotic surgery is a rapidly evolving field, driven by technological advances and end user enthusiasm. It is not yet clear whether the proposed advantages of robotic sur­gery are durable and meaningful. Thoughtful clinical analysis, best answered with
21 Current and Future Platforms for Robotic Colorectal Surgery
309
randomized clinical trials, is difficult to structure into practice prior to technical advances. Therefore, the real benefits of robotic surgery, whether to patient, surgeon, or both, are not yet clearly identified. As always, well-designed studies, ideally ran­domized, will hopefully clarify these issues but may not be performed prior to wide­spread adoption of the technology.

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J.N. Harr and D. Nagle

Acknowledgements

I would like to thank God, first and foremost, for providing me the opportunity to edit and help guide this incredible group of authors. I have been blessed with my parents, Vicente and Teodora Obias—thank you for all of your unconditional love and support. Throughout this endeavor, there are many more individuals whose efforts I would like to thank, but the person most central in this has been my beauti­ful wife, Sharon. Without her guidance (and help), this textbook would never have been finished.
To all of the authors and coauthors, thank you again for spending your hard­earned time writing chapters for this inaugural textbook. I have thanked many of you in person and do so again. I would also like to thank Maria Smilios who helped start this textbook and Colton Coreschi who helped finish it.
From the bottom of my heart, thank you all.
Vincent Obias
© Springer International Publishing Switzerland 2017 V. Obias (ed.), Robotic Colon and Rectal Surgery, DOI 10.1007/978-3-319-43256-4
311

Index

A
Abdominal air insufflation, 4 Additional experience phase, 13 Adhesions, 289 Aer-O-Scope™, 307 Alexis™, 34 American College of Surgeons National Surgical
Quality Improvement Program Database (ACS-NSQIP), 282
American Society of Colon and Rectal Surgeons
Young Surgeons group, 195
American Society of Reproductive Medicine
(ASRM), 244 Aminosalicylates (5-ASA), 154 Anastomotic leak rate, 200 Anesthesia, 132 Anterior mesh fixation, 136–137 Aromatase inhibitors, 249 Articulated instruments, 176
B
Bilateral salpingo-oophorectomy, 144–147 BioRobotics laboratory, 304
CO
embolism, 264
2
Colon Cancer Laparoscopic or Open
Combined oral contraceptives (COCs), 248 Concluding phase, 13 Concomitant rectopexy, 148 Conscious inhibition/gentleness, 178 Conventional laparoscopy, 59 Cost analysis, 42 Credentialing and privileges in robotics, 18 Crohn’s disease
Cumulative sum analysis (CUSUM), 214 Cystocele, 142
Resection study (COLOR II) trial, 8, 210
da Vinci assisted single port
colectomies, 166 diagnosis, 165 genetic susceptibility, 164 hemicolectomy, 166 ileocecal resection, stricturoplasty, 165 medical therapy, 165 nonspecific symptoms, 165 robot, 166 transmural inflammatory process, 164
C
Capnothorax, 263, 264 Cardiopulmonary complications, 263 Cardiovascular, 117 Charge-coupled device camera (CCD), 107 Cholecystectomy, 5–6 Circumferential margins (CRM), 8 Clinical Outcomes of Surgical Therapy
(COST) study, 7, 209
© Springer International Publishing Switzerland 2017 V. Obias (ed.), Robotic Colon and Rectal Surgery, DOI 10.1007/978-3-319-43256-4
D
da Vinci Firefly Imaging System, 105,
da Vinci robot, 42 da Vinci surgical systems (dVSS), 17, 18, 43,
da Vinci Xi patient cart, 297 da Vinci Xi system, 137
107–108
51, 191, 195 master-slave configuration, 19
313