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International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS

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https://www.readbyqxmd.com/read/28719002/eyeslam-real-time-simultaneous-localization-and-mapping-of-retinal-vessels-during-intraocular-microsurgery
#1
Daniel Braun, Sungwook Yang, Joseph N Martel, Cameron N Riviere, Brian C Becker
BACKGROUND: Fast and accurate mapping and localization of the retinal vasculature is critical to increasing the effectiveness and clinical utility of robot-assisted intraocular microsurgery such as laser photocoagulation and retinal vessel cannulation. METHODS: The proposed EyeSLAM algorithm delivers 30 Hz real-time simultaneous localization and mapping of the human retina and vasculature during intraocular surgery, combining fast vessel detection with 2D scan-matching techniques to build and localize a probabilistic map of the vasculature...
July 18, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28714565/mri-compatible-breast-rib-phantom-for-evaluating-ultrasonic-thermal-exposures
#2
Georgios Menikou, Marinos Yiannakou, Christos Yiallouras, Cleanthis Ioannides, Christakis Damianou
INTRODUCTION: The target of this study was the development of a magnetic resonance imaging (MRI) compatible breast phantom for focused ultrasound which includes plastic (ABS) ribs. The objective of the current study was the evaluation of a focused ultrasound procedure using the proposed phantom that eliminates rib heating. MATERIAL AND METHODS: The proposed phantom was evaluated using two different focused ultrasound exposures. The surrounding breast tissue was mimicked using an agar-silica-evaporation milk gel (2% w/v - 2% w/v - 40% v/v)...
July 17, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28660725/automated-robot-assisted-surgical-skill-evaluation-predictive-analytics-approach
#3
Mahtab J Fard, Sattar Ameri, R Darin Ellis, Ratna B Chinnam, Abhilash K Pandya, Michael D Klein
BACKGROUND: Surgical skill assessment has predominantly been a subjective task. Recently, technological advances such as robot-assisted surgery have created great opportunities for objective surgical evaluation. In this paper, we introduce a predictive framework for objective skill assessment based on movement trajectory data. Our aim is to build a classification framework to automatically evaluate the performance of surgeons with different levels of expertise. METHODS: Eight global movement features are extracted from movement trajectory data captured by a da Vinci robot for surgeons with two levels of expertise - novice and expert...
June 29, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28660682/robotic-versus-thoracoscopic-thymectomy-the-current-evidence
#4
Judith Buentzel, Judith Heinz, Marc Hinterthaner, Friedrich A Schöndube, Carmen Straube, Christian Roever, Alexander Emmert
BACKGROUND: The purpose of this study was to analyze all relevant comparative studies comparing robot-assisted minimally invasive thymectomy (RATS) and video-assisted thoracic surgery thymectomy (VATS) in terms of surgical and short-term outcomes. METHODS: A systematic search for articles describing robot-assisted and video-assisted thymectomy and addressing surgical outcomes, operation time, length of hospitalization, intra-operative blood loss, conversion to sternotomy and post-operative complications was performed using the medical databases...
June 29, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28660676/manipulator-driven-selection-of-semi-active-mr-visible-markers
#5
Junmo An, Andrew G Webb, Dipan J Shah, Karen Chin, Nikolaos V Tsekos
BACKGROUND: A method for the identification of semi-active fiducial magnetic resonance (MR) markers is presented based on selectively optically tuning and detuning them. METHODS: Four inductively coupled solenoid coils with photoresistors were connected to light sources. A microcontroller timed the optical tuning/detuning of coils and image collection. The markers were tested on an MR manipulator linking the microcontroller to the manipulator control to visibly select the marker subset according to the actuated joint...
June 29, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28660644/motion-control-skill-assessment-based-on-kinematic-analysis-of-robotic-end-effector-movements
#6
Ke Liang, Yuan Xing, Jianmin Li, Shuxin Wang, Aimin Li, Jinhua Li
BACKGROUND: The performance of robotic end-effector movements can reflect the user's operation skill difference in robot-assisted minimally invasive surgery. This study quantified the trade-off of speed-accuracy-stability by kinematic analysis of robotic end-effector movements to assess the motion control skill of users with different levels of experience. METHODS: Using 'MicroHand S' system, 10 experts, 10 residents and 10 novices performed single-hand test and bimanual coordination test...
June 29, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28618097/accuracy-of-navigated-cam-resection-in-femoroacetabular-impingement-a-randomised-controlled-trial
#7
Jan Van Houcke, Vikas Khanduja, Naoki Nakano, Peter Krekel, Christophe Pattyn, Emmanuel Audenaert
BACKGROUND: The main cause for revision hip arthroscopy surgery is incomplete bony resection of femoroacetabular impingement (FAI). This study aimed to compare the cam resection accuracy via the conventional hip arthroscopy technique with the navigation technique. METHODS: Two prospectively randomized groups were recruited: navigated (n = 15) and conventional (n = 14). A pre-operative CT and post-operative MRI scan were obtained in all cases to compare alpha angle, range of motion simulation and determine a pre-operative 3D surgical resection plan...
June 15, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28568650/robotic-proctectomy-for-rectal-cancer-analysis-of-71-patients-from-a-single-institution
#8
Philip M Spanheimer, John G Armstrong, Sunyang Fu, Junlin Liao, Scott E Regenbogen, John C Byrn
BACKGROUND: Despite increasing use of robotic surgery for rectal cancer, few series have been published from the practice of generalizable US surgeons. METHODS: A retrospective chart review was performed for 71 consecutive patients who underwent robotic low anterior resection (LAR) or abdominoperineal resection (APR) for rectal adenocarcinoma between 2010 and 2014. RESULTS: 46 LARs (65%) and 25 APRs (35%) were identified. Median procedure time was 219 minutes (IQR 184-275) and mean blood loss 164...
June 1, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28568474/the-biomechanical-effect-of-tunnel-placement-on-acl-graft-forces-in-double-bundle-acl-reconstruction-a-3d-computational-simulation
#9
Nathan H Varady, Willem A Kernkamp, Jingsheng Li, Lianxin Wang, Hiroshi Koga, Peter Asnis, Guoan Li
BACKGROUND: The posterolateral (PL) graft experiences a high failure rate in anterior cruciate ligament double-bundle (DB) reconstruction. It is hypothesized that tunnel positions could dramatically affect the graft forces. METHODS: A validated computational model was used to simulate DB reconstruction with various femoral PL tunnel locations (8-11 mm center-center tunnel spacing). Graft fixation was simulated at both 0° and 30°. Knee biomechanics were examined with the knee under a 134 N anterior load and 400 N quadriceps load at 0°, 30°, 60°, and 90° of flexion...
June 1, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28556582/precision-and-accuracy-of-imageless-navigation-versus-freehand-implantation-of-total-hip-arthroplasty-a-systematic-review-and-meta-analysis
#10
REVIEW
Thom Snijders, S M van Gaalen, A de Gast
BACKGROUND: Total hip arthroplasty (THA) is named the most successful surgical procedure of the twentieth century. To remain a success in the twenty-first century THA should meet the higher demands of patients and society with regard to technical and functional outcome, costs and implant survival. To meet these demands optimal acetabular cup positioning is necessary. An imageless navigation system (NAV) might prevent malpositioning of the acetabular cup in THA. The aim of this study has been to compare the precision and accuracy of the anteversion and inclination of the acetabular cup position after NAV implantation and after freehand implantation of THA...
May 29, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28548233/robotic-longitudinal-pancreaticojejunostomy-for-chronic-pancreatitis-comparison-of-clinical-outcomes-and-cost-to-the-open-approach
#11
Russell C Kirks, Patrick D Lorimer, Michael Fruscione, Allyson Cochran, Erin H Baker, David A Iannitti, Dionisios Vrochides, John B Martinie
BACKGROUND: This study compares clinical and cost outcomes of robot-assisted laparoscopic (RAL) and open longitudinal pancreaticojejunostomy (LPJ) for chronic pancreatitis. METHODS: Clinical and cost data were retrospectively compared between open and RAL LPJ performed at a single center from 2008-2015. RESULTS: Twenty-six patients underwent LPJ: 19 open and 7 RAL. Two robot-assisted cases converted to open were included in the open group for analysis...
May 26, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28544676/robotic-distal-locking-of-intramedullary-nailing-technical-description-and-cadaveric-testing
#12
Martin Panzica, Eduardo M Suero, Ralf Westphal, Musa Citak, Emmanouil Liodakis, Nael Hawi, Max Petri, Christian Krettek, Timo Stuebig
Interlocked intramedullary nailing is the treatment of choice for femoral shaft fractures. However, distal locking is a technically challenging part of the procedure that can result in distal femoral malrotation and high radiation exposure. We have tested a robotic procedure for robotic distal locking based on the computation of a drilling trajectory on two calibrated fluoroscopic images. Twenty distal holes were attempted in ten cadaveric femur specimens. Successful screw hole drilling was achieved at the first attempt in each of the ten specimens (20 drill holes in total)...
May 23, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28544316/negating-the-fulcrum-effect-in-manual-laparoscopic-surgery-investigating-skill-acquisition-with-a-haptic-simulator
#13
Adam J Spiers, Sarah Baillie, Tony G Pipe, George Asimakopolous
BACKGROUND: Manual laparoscopic surgery requires extensive training and familiarization. It has been suggested that motion inversion caused by the 'fulcrum effect' is key to motor challenges. We investigate the potential of a conceptual semi-robotic handheld tool that negates natural inversion. METHODS: A custom laparoscopic simulator with haptic feedback was developed to allow interactive evaluation of the conceptual tool via virtual prototyping, prior to fabricating a physical prototype...
May 23, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28544251/robotic-bariatric-surgery-a-general-review-of-the-current-status
#14
REVIEW
Minoa K Jung, Monika E Hagen, Nicolas C Buchs, Leo H Buehler, Philippe Morel
BACKGROUND: While conventional laparoscopy is the gold standard for almost all bariatric procedures, robotic assistance holds promise for facilitating complex surgeries and improving clinical outcomes. Since the report of the first robotic-assisted bariatric procedure in 1999, numerous publications, including those reporting comparative trials and meta-analyses across bariatric procedures with a focus on robotic assistance, can be found. PURPOSE: This article reviews the current literature and portrays the perspectives of robotic bariatric surgery...
May 23, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28544071/a-prospective-randomized-controlled-trial-for-assessment-of-perineal-hydrodissection-technique-for-nervesparing-robot-assisted-radical-prostatectomy
#15
G Hatiboglu, T Simpfendörfer, L Uhlmann, M A Bergero, S Macher-Goeppinger, S Pahernik, B Hadaschik, M Hohenfellner, D Teber
BACKGROUND: This study prospectively evaluated the safety and efficacy of perineal hydrodissection in robot assisted nervesparing prostatectomy. METHODS: Patients were randomized for perineal, ultrasound guided hydrodissection (HD) before radical prostatectomy and compared with standard treatment (ST). Follow-up was done every 3 months, including erectile function (IIEF5-score), reported grade of erection, ability for sexual intercourse, continence, PSA. RESULTS: 21 patients were enrolled to this prospective study, 10 for ST and 11 for HD...
May 23, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28524620/clinical-performance-and-survivorship-of-navigated-floating-platform-mobile-bearing-total-knee-arthroplasty-a-minimum-10-year-follow-up
#16
Sang-Min Kim, Jai-Gon Seo, Seung-Jae Lim, Hyung-Tae Lim, Chang-Ho Cho, Young-Wan Moon
BACKGROUND: The purpose of this study is to report the outcome of navigation-assisted cruciate-retaining total knee arthroplasty (TKA) using one type of cemented, second-generation, floating-platform (FP), mobile-bearing system. METHODS: Forty-two patients who underwent cruciate retaining TKAs using e.motion-FP prostheses under navigational guidance were retrospectively reviewed. The preoperative diagnosis was osteoarthritis in all knees except one rheumatoid arthritis...
May 19, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28524449/technical-feasibility-and-safety-of-image-guided-parieto-occipital-ventricular-catheter-placement-with-the-assistance-of-a-wearable-head-up-display
#17
Jang W Yoon, Robert E Chen, Karim ReFaey, Roberto J Diaz, Ronald Reimer, Ricardo J Komotar, Alfredo Quinones-Hinojosa, Benjamin L Brown, Robert E Wharen
BACKGROUND: Wearable technology is growing in popularity as a result of its ability to interface with normal human movement and function. METHODS: Using proprietary hardware and software, neuronavigation images were captured and transferred wirelessly via a password-encrypted network to the head-up display. The operating surgeon wore a loupe-mounted wearable head-up display during image-guided parieto-occipital ventriculoperitoneal shunt placement in two patients...
May 19, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28513095/research-of-the-master-slave-robot-surgical-system-with-the-function-of-force-feedback
#18
Yunyong Shi, Chaozheng Zhou, Le Xie, Yongjun Chen, Jun Jiang, Zhenfeng Zhang, Ze Deng
BACKGROUND: Surgical robots lack force feedback, which may lead to operation errors. In order to improve surgical outcomes, this research developed a new master-slave surgical robot, which was designed with an integrated force sensor. METHODS: The new structure designed for the master-slave robot employs a force feedback mechanism. A six-dimensional force sensor was mounted on the tip of the slave robot's actuator. Sliding model control was adopted to control the slave robot...
May 17, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28508529/mastery-learning-does-the-method-of-learning-make-a-difference-in-skills-acquisition-for-robotic-surgery
#19
Karen L Siroen, Christopher D W Ward, Abelardo Escoto, Michael D Naish, Yves Bureau, Rajni V Patel, Christopher M Schlachta, Sayra M Cristancho, Ana Luisa Trejos
BACKGROUND: Few studies compare the effectiveness of blocked vs random practice conditions in minimally invasive surgery training, and none have evaluated these in robotic surgery training. METHODS: The dV-Trainer(®) and the da Vinci(®) Surgical System (dVSS) were used to compare practice conditions. Forty-two participants were randomized into blocked and random practice groups. Each participant performed five tasks: Ring Walk, Thread the Rings, Needle Targeting, Suture Sponge and Tubes Level 2...
May 16, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28497536/robotic-guided-waterjet-cutting-technique-for-high-tibial-dome-osteotomy-a-pilot-study
#20
Eduardo M Suero, Ralph Westphal, David Zaremba, Musa Citak, Nael Hawi, Mustafa Citak, Timo Stuebig, Christian Krettek, Emmanouil Liodakis
BACKGROUND: Oscillating saws generate high levels of heat (up to 150°C), which can lead to tissue necrosis, delayed healing and infection. Abrasive waterjet-cutting techniques have been described as a new tool to perform bone cuts, with less heat generation. METHODS: Four lower-limbs of four human alcohol conserved cadavers were tested. Navigation references were attached to the tibia and an intraoperative fluoroscopy-based 3D scan was obtained. A 1.2 mm diameter nozzle was attached to a robotic arm, which was guided to follow a pre-specified path...
May 12, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
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