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https://www.readbyqxmd.com/read/29453729/perioperative-outcomes-of-robotic-hysterectomy-with-mini-laparotomy-versus-open-hysterectomy-for-uterus-weighing-more-than-250-g
#1
Natasha Gupta, Shanti Mohling, Rebecca Mckendrick, Rayan Elkattah, Jenny Holcombe, Robert S Furr, Todd Boren, Stephen DePasquale
To compare perioperative outcomes in patients undergoing robotic hysterectomy and extraction of specimen via mini-laparotomy (RHML) versus open hysterectomy (OH) when uterus weighs more than 250 g. To study the factors determining the length of hospital stay in 2 groups. A retrospective analysis of all hysterectomies performed for uterus weighing more than 250 g from the year 2012 to 2015 was conducted. A total of 140 patients were divided into 2 groups based on the type of surgery; RHML (n = 82) and OH (n = 58)...
February 16, 2018: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/29453652/significance-of-the-nonneoplastic-renal-parenchymal-findings-in-robotic-partial-nephrectomy-series
#2
Ercan Malkoç, Matthew J Maurice, Oktay Akça, Önder Kara, Homayoun Zargar, Hiury Andrade, Daniel Ramirez, Peter Caputo, Robert Stein, Demirjian Sevag, Jihad H Kaouk
AIM: To describe the pathological characteristics of the peritumoral non-neoplastic renal parenchyma (NNRP) and to investigate their impact on long-term renal function after partial nephrectomy. MATERIALS AND METHODS: In our institutional robotic partial nephrectomy database, we identified 394 cases with pathological assessment of the NNRP and long-term postoperative renal functional follow-up. The NNRP was classified as normal (healthy renal parenchyma) or abnormal, based on the presence of arteriosclerosis, glomerulosclerosis, interstitial fibrosis, interstitial inflammation, and/or tubulopapillary hyperplasia...
February 16, 2018: Journal of Nephrology
https://www.readbyqxmd.com/read/29453171/finger-strength-individuation-and-their-interaction-relationship-to-hand-function-and-corticospinal-tract-injury-after-stroke
#3
Eric T Wolbrecht, Justin B Rowe, Vicky Chan, Morgan L Ingemanson, Steven C Cramer, David J Reinkensmeyer
OBJECTIVE: The goal of this study was to determine the relative contributions of finger weakness and reduced finger individuation to reduced hand function after stroke, and their association with corticospinal tract (CST) injury. METHODS: We measured individuated and synergistic maximum voluntary contractions (MVCs) of the index and middle fingers, in both flexion and extension, of 26 individuals with a chronic stroke using a robotic exoskeleton. We quantified finger strength and individuation, and defined a novel metric that combines them - "multifinger capacity"...
February 3, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29451446/improving-patient-safety-during-introduction-of-novel-medical-devices-through-cumulative-summation-analysis
#4
Vejay N Vakharia, Roman Rodionov, Andrew W McEvoy, Anna Miserocchi, Rachel Sparks, Aidan G O'Keeffe, Sebastien Ourselin, John S Duncan
OBJECTIVE The aim of this study was to implement cumulative summation (CUSUM) analysis as an early-warning detection and quality assurance system for preclinical testing of the iSYS1 novel robotic trajectory guidance system. METHODS Anatomically accurate 3D-printed skull phantoms were created for 3 patients who underwent implantation of 21 stereoelectroencephalography electrodes by surgeons using the current standard of care (frameless technique). Implantation schema were recreated using the iSYS1 system, and paired accuracy measures were compared with the previous frameless implantations...
February 16, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29450567/coronal-tibial-anteromedial-tunnel-location-has-minimal-effect-on-knee-biomechanics
#5
Shigehiro Asai, Donghwi Kim, Yuichi Hoshino, Chan-Woong Moon, Akira Maeyama, Monica Linde, Patrick Smolinski, Freddie H Fu
PURPOSE: Studies have found anatomic variation in the coronal position of the insertion site of anteromedial (AM) bundle of the anterior cruciate ligament (ACL) on the tibia, which can lead to questions about tunnel placement during ACL reconstruction. The purpose of this study was to determine how mediolateral placement of the tibial AM graft tunnel in double-bundle ACL reconstructions affects knee biomechanics. METHODS: Two different types of double-bundle ACL reconstructions were performed...
February 15, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29449761/active-localization-and-tracking-of-needle-and-target-in-robotic-image-guided-intervention-systems
#6
Mark Renfrew, Mark Griswold, M Cenk Çavuşoğlu
This paper describes a framework of algorithms for the active localization and tracking of flexible needles and targets during image-guided percutaneous interventions. The needle and target configurations are tracked by Bayesian filters employing models of the needle and target motions and measurements of the current system state obtained from an intra-operative imaging system which is controlled by an entropy-minimizing active localization algorithm. Versions of the system were built using particle and unscented Kalman filters and their performance was measured using both simulations and hardware experiments with real magnetic resonance imaging data of needle insertions into gel phantoms...
January 2018: Autonomous Robots
https://www.readbyqxmd.com/read/29448659/development-of-a-spoke-type-torque-sensor-using-painting-carbon-nanotube-strain-sensors
#7
Sung Yong Kim, Se Hoon Park, Baek Gyu Choi, In Hyuk Kang, Sang Wook Park, Jeong Woo Shin, Jin Ho Kim, Woon Kyung Baek, Kwon Taek Lim, Young-Ju Kim, Jae-Bok Song, Inpil Kang
This study reports a hub-spoke type joint torque sensor involving strain gauges made of multiwalled carbon nanotubes (MWCNT). We developed the novel joint torque sensor for robots by means of MWCNT/epoxy strain sensors (0.8 wt%, gauge factor 2) to overcome the limits of conventional foil strain gauges. Solution mixing process was hired to fabricate a liquid strain sensor that can easily be installed on any complicated surfaces. We painted the MWCNT/epoxy mixing liquid on the hub-spoke type joint torque sensor to form the piezoresistive strain gauges...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448653/self-powered-sensors-and-flexible-triboelectric-nanogenerator-for-powering-portable-electronics
#8
Piyush Kanti Sarkar, Subrata Maji, Somobrata Acharya
We report on a flexible triboelectric nanogenerator (FTENG) designed using polydimethylsiloxane (PDMS) and aluminium (Al) combinations to convert ambient mechanical energy into electrical outputs. An open-circuit output voltage of ~40 V and short-circuit current density of ~63.6 mA m-2 with power density 0.62 W m-2 was easily obtained from the FTENG. The harvested mechanical energy is used for lighting ~100 light emitting diodes and to operate seven segment display enabling prospects for carbon-emission free environment friendly source for powering portable electronic devices...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29446620/polydopamine-coated-main-chain-liquid-crystal-elastomer-as-optically-driven-artificial-muscle
#9
Hongmiao Tian, Zhijian Wang, Yilong Chen, Jinyou Shao, Tong Gao, Shengqiang Cai
Optically-driven active materials have received much attention because their deformation and motion can be controlled remotely, instantly and precisely in a contactless way. In this article, we investigated an optically-actuated elastomer with rapid response: polydopamine (PDA)-coated liquid crystal elastomer (LCE). Due to the photothermal effect of PDA coating and thermal responsiveness of LCE, the elastomer film contracted significantly with near infrared (NIR) irradiation. With a fixed strain, light-induced actuating stress in the film could be as large as 1...
February 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29445608/robotic-surgery
#10
Robert J Cerfolio
No abstract text is available yet for this article.
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29445599/robotic-vascular-resections-during-whipple-procedure
#11
REVIEW
Bassan J Allan, Stephanie M Novak, Melissa E Hogg, Herbert J Zeh
Indications for resection of pancreatic cancers have evolved to include selected patients with involvement of peri-pancreatic vascular structures. Open Whipple procedures have been the standard approach for patients requiring reconstruction of the portal vein (PV) or superior mesenteric vein (SMV). Recently, high-volume centers are performing minimally invasive Whipple procedures with portovenous resections. Our institution has performed seventy robotic Whipple procedures with concomitant vascular resections...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29445036/transition-by-head-on-collision-mechanically-mediated-manoeuvres-in-cockroaches-and-small-robots
#12
Kaushik Jayaram, Jean-Michel Mongeau, Anand Mohapatra, Paul Birkmeyer, Ronald S Fearing, Robert J Full
Exceptional performance is often considered to be elegant and free of 'errors' or missteps. During the most extreme escape behaviours, neural control can approach or exceed its operating limits in response time and bandwidth. Here we show that small, rapid running cockroaches with robust exoskeletons select head-on collisions with obstacles to maintain the fastest escape speeds possible to transition up a vertical wall. Instead of avoidance, animals use their passive body shape and compliance to negotiate challenging environments...
February 2018: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29444354/clothing-as-a-transport-vector-for-airborne-particles-chamber-study
#13
Dusan Licina, William W Nazaroff
Strong evidence suggests that clothing serves as a reservoir of chemical pollutants and particles, including bioaerosols, which may have health significance. However, little is known about the role that clothing may play as a transport vector for inhaled airborne particles. Here we contribute toward bridging the knowledge gap by conducting experiments to investigate clothing release fraction (CRF), determined as the size-dependent ratio of released to deposited particulate matter in the diameter range 0.5-10 μm...
February 14, 2018: Indoor Air
https://www.readbyqxmd.com/read/29443916/mexican-hat-like-response-in-a-flexible-tactile-sensor-using-a-magnetorheological-elastomer
#14
Takumi Kawasetsu, Takato Horii, Hisashi Ishihara, Minoru Asada
A significant challenge in robotics is providing a sense of touch to robots. Even though several types of flexible tactile sensors have been proposed, they still have various technical issues such as a large amount of deformation that fractures the sensing elements, a poor maintainability and a deterioration in the sensitivity caused by the presence of a thick and soft covering. As one solution for these issues, we proposed a flexible tactile sensor composed of a magnet, magnetic transducer and dual-layer elastomer, which consists of a magnetorheological and nonmagnetic elastomer sheet...
February 14, 2018: Sensors
https://www.readbyqxmd.com/read/29443906/a-single-rf-emitter-based-indoor-navigation-method-for-autonomous-service-robots
#15
Tyrone Sherwin, Mikala Easte, Andrew Tzer-Yeu Chen, Kevin I-Kai Wang, Wenbin Dai
Location-aware services are one of the key elements of modern intelligent applications. Numerous real-world applications such as factory automation, indoor delivery, and even search and rescue scenarios require autonomous robots to have the ability to navigate in an unknown environment and reach mobile targets with minimal or no prior infrastructure deployment. This research investigates and proposes a novel approach of dynamic target localisation using a single RF emitter, which will be used as the basis of allowing autonomous robots to navigate towards and reach a target...
February 14, 2018: Sensors
https://www.readbyqxmd.com/read/29443897/structured-kernel-subspace-learning-for-autonomous-robot-navigation
#16
Eunwoo Kim, Sungjoon Choi, Songhwai Oh
This paper considers two important problems for autonomous robot navigation in a dynamic environment, where the goal is to predict pedestrian motion and control a robot with the prediction for safe navigation. While there are several methods for predicting the motion of a pedestrian and controlling a robot to avoid incoming pedestrians, it is still difficult to safely navigate in a dynamic environment due to challenges, such as the varying quality and complexity of training data with unwanted noises. This paper addresses these challenges simultaneously by proposing a robust kernel subspace learning algorithm based on the recent advances in nuclear-norm and l 1 -norm minimization...
February 14, 2018: Sensors
https://www.readbyqxmd.com/read/29443430/small-scale-machines-driven-by-external-power-sources
#17
REVIEW
Xiang-Zhong Chen, Bumjin Jang, Daniel Ahmed, Chengzhi Hu, Carmela De Marco, Marcus Hoop, Fajer Mushtaq, Bradley J Nelson, Salvador Pané
Micro- and nanorobots have shown great potential for applications in various fields, including minimally invasive surgery, targeted therapy, cell manipulation, environmental monitoring, and water remediation. Recent progress in the design, fabrication, and operation of these miniaturized devices has greatly enhanced their versatility. In this report, the most recent progress on the manipulation of small-scale robots based on power sources, such as magnetic fields, light, acoustic waves, electric fields, thermal energy, or combinations of these, is surveyed...
February 14, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29442518/large-area-high-performance-flexible-pressure-sensor-with-carbon-nanotube-active-matrix-for-electronic-skin
#18
Luca Nela, Jianshi Tang, Qing Cao, George S Tulevski, Shu-Jen Han
Artificial "electronic skin" is of great interest for mimicking the functionality of human skin, such as tactile pressure sensing. Several important performance metrics include mechanical flexibility, operation voltage, sensitivity and accuracy, as well as response speed. In this paper, we demonstrate a large-area high-performance flexible pressure sensor built on an active matrix of 16×16 carbon nanotube thin-film transistors (CNT TFTs). Made from highly-purified solution tubes, the active matrix exhibits superior flexible TFT performance with high mobility and large current density, along with a high device yield of nearly 99% over 4-inch sample area...
February 14, 2018: Nano Letters
https://www.readbyqxmd.com/read/29442240/review-of-emerging-surgical-robotic-technology
#19
REVIEW
Brian S Peters, Priscila R Armijo, Crystal Krause, Songita A Choudhury, Dmitry Oleynikov
BACKGROUND: The use of laparoscopic and robotic procedures has increased in general surgery. Minimally invasive robotic surgery has made tremendous progress in a relatively short period of time, realizing improvements for both the patient and surgeon. This has led to an increase in the use and development of robotic devices and platforms for general surgery. The purpose of this review is to explore current and emerging surgical robotic technologies in a growing and dynamic environment of research and development...
February 13, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29442156/ventral-rectopexy-with-biological-mesh-short-term-functional-results
#20
M Brunner, H Roth, K Günther, R Grützmann, K E Matzel
PURPOSE: Ventral mesh rectopexy (VMR) is an established, minimally invasive, nerve-sparing procedure for the treatment of various symptomatic morphological changes in the posterior pelvic compartment. We present the short-term functional outcome and patient satisfaction after laparoscopic and robotic VMR with biological mesh. METHODS: We analyzed data from 123 patients who underwent laparoscopic ventral mesh rectopexy (LVMR) or robotic ventral mesh rectopexy (RVMR) from August 2012 to January 2017...
February 13, 2018: International Journal of Colorectal Disease
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