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Electromagnetic navigator

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https://www.readbyqxmd.com/read/29156147/electromagnetic-navigational-bronchoscopy-versus-ct-guided-percutaneous-sampling-of-peripheral-indeterminate-pulmonary-nodules-a-cohort-study
#1
Kavita M Bhatt, Yasmeen K Tandon, Ruffin Graham, Charles T Lau, Jason K Lempel, Joseph T Azok, Peter J Mazzone, Erika Schneider, Nancy A Obuchowski, Michael A Bolen
Purpose To compare the diagnostic yield and complication rates of electromagnetic navigational bronchoscopic (ENB)-guided and computed tomography (CT)-guided percutaneous tissue sampling of lung nodules. Materials and Methods Retrospectively identified were 149 patients sampled percutaneously with CT guidance and 146 patients who underwent ENB with transbronchial biopsy of a lung lesion between 2013 and 2015. Clinical data, incidence of complications, and nodule pathologic analyses were assessed through electronic medical record review...
November 20, 2017: Radiology
https://www.readbyqxmd.com/read/29144018/navigated-retrograde-endoscopic-myotomy-rem-for-the-treatment-of-therapy-resistant-achalasia
#2
K D Pham, R F Havre, T Langø, E F Hofstad, G A Tangen, R Mårvik, T Pham, O H Gilja, J G Hatlebakk, A Viste
BACKGROUND: In achalasia, muscle spasm may involve the proximal esophagus. When the muscle spasm is located in the proximal esophagus, conventional per oral endoscopic myotomy (POEM) may not be sufficient to relieve symptoms. In this paper, we describe retrograde endoscopic myotomy (REM) as a novel approach to perform myotomy of the proximal esophagus, with the application of a navigation tool for anatomical guidance during REM. We aim to evaluate the feasibility and safety of REM and usefulness of the navigation during REM...
November 16, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29078691/navigational-bronchoscopy-guided-dye-marking-to-assist-resection-of-a-small-lung-nodule
#3
Jennifer L Sullivan, Michael G Martin, Benny Weksler
Electromagnetic navigational bronchoscopy (ENB) can be used to dye mark nodules that are difficult to identify during minimally invasive lung resection thoracic surgery. This case report describes the technique of ENB to identify and resect a suspicious small pulmonary nodule in a patient undergoing resection of lung adenocarcinoma.
2017: J Vis Surg
https://www.readbyqxmd.com/read/29076463/-application-of-intraoperative-electromagnetic-frameless-navigation-in-transcranial-and-endoscopic-neurosurgical-interventions
#4
V A Shurkhay, S A Goryaynov, M A Kutin, S A Eolchiyan, D N Capitanov, D V Fomichev, P L Kalinin, A N Shkarubo, D N Kopachev, A G Melikyan, M V Nersesyan, A M Shkatova, A N Konovalov, A A Potapov
The paper summarizes the experience in using a system of electromagnetic intraoperative frameless navigation in various neurosurgical pathologies of the brain. The electromagnetic navigation technique was used for 102 operations in 98 patients, including 36 transnasal endoscopic interventions. There were no intraoprtative and postoperative complications associated with the use of the system. In the process of using the system, factors influencing the accuracy of navigation and requiring additional control by the surgeon were identified...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/29049613/hybrid-operating-room-dyna-computed-tomography-combined-image-guided-electromagnetic-navigation-bronchoscopy-dye-marking-and-hookwire-localization-video-assisted-thoracic-surgery-metastasectomy
#5
Calvin S H Ng, Cheuk Man Chu, Cheuk Kin Lo, Rainbow W H Lau
Hybrid operating room Dyna-computed tomography imaging is increasingly recognized as an important adjunct for management of small pulmonary lesions, either for biopsy or for localization to guide surgical resection. We describe for the first time the combined hybrid operating room Dyna-computed tomography image-guided electromagnetic navigation bronchoscopy dye marking and hookwire localization approach to localize multiple sub-centimetre nodules for video-assisted thoracic surgery metastasectomy. Furthermore, such complex set of procedures can be safely and effectively performed within one operating environment, maximizing work efficiency and minimizing the potential for complications...
September 27, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28975636/combining-electromagnetic-navigation-and-3-d-mapping-to-reduce-fluoroscopy-time-and-achieve-optimal-crt-response
#6
Umberto Barbero, Carlo Budano, Pier Giorgio Golzio, Davide Castagno, Fiorenzo Gaita
Implantation of cardiac resynchronization therapy (CRT) devices can be challenging, time consuming, and associated with high-dose X-Ray exposure. We present the technique in which an electromagnetic navigation system (MediGuideTM, St. Jude Medical) and an electro-anatomical three-dimensional mapping system (EnSite NavX, St Jude Medical) are usefully combined for implanting ICD-CRT devices with strong reduction of X-ray exposure, and for targeting the most delayed regions in the activation maps avoiding scars for optimal CRT response...
October 4, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28962707/hybrid-theater-and-uniportal-video-assisted-thoracic-surgery-the-perfect-match-for-lung-nodule-localization
#7
REVIEW
Ze-Rui Zhao, Rainbow W H Lau, Calvin S H Ng
Cone-beam computed tomography provides unparalleled real-time imaging of the patient within the hybrid theater, which can be used for simultaneously diagnosing and localizing small pulmonary lesions for resection. Hybrid theater can guide more precise placement of electromagnetic navigation bronchoscopy tools, thereby increasing the diagnostic yield in biopsy procedures while reducing diffusion artifact in dye marking for nodule localization. Furthermore, hook-wires implantation that is widely used to assist in lesion localization for uniportal thoracoscopic surgery can take place in the hybrid suite, eliminating the common complications and discomfort associated with the conventional workflow carried out in the radiology suite...
November 2017: Thoracic Surgery Clinics
https://www.readbyqxmd.com/read/28944129/endoscopic-assisted-ommaya-reservoir-placement-technical-note
#8
Jessica Lane, Brad E Zacharia
Ommaya reservoir placement has been an option for patients requiring cerebrospinal fluid (CSF) access since the 1960s. It is preferred to repeat lumbar punctures, both in terms of patient comfort and the consistency of intrathecal drug concentration. Technological developments have advanced the placement technique, allowing for better accuracy and reduced complications. Freehand placement was first augmented with pneumoencephalograms and intraoperative computerized tomography (CT), then with optical-based navigation, and finally by utilizing electromagnetic neuronavigation...
July 19, 2017: Curēus
https://www.readbyqxmd.com/read/28930582/hypothesis-on-interactions-of-macromolecules-based-on-molecular-vibration-patterns-in-cells-and-tissues
#9
Werner Jaross
The molecular vibration patterns of structure-forming macromolecules in the living cell create very specific electromagnetic frequency patterns which might be used for information on spatial position in the three-dimensional structure as well as the chemical characteristics. Chemical change of a molecule results in a change of the vibration pattern and thus in a change of the emitted electromagnetic frequency pattern. These patterns have to be received by proteins responsible for the necessary interactions and functions...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28889136/electro-navigational-bronchoscopy-for-bilateral-peripheral-lung-lesions-a-case-report
#10
A H Faisal, A W Sopian, H Tidi
Electromagnetic navigational bronchoscopy (ENB), one of the methods of navigational bronchoscopy is an advanced diagnostic tool allowing tissue sampling at the lung peripheries which were previously accessible only by computed tomography (CT) guidance or video-assisted thoracoscopic surgery (VATS). We report a 53-year-old man who presented with a cough and dyspnea with constitutional symptoms for one month. CT thorax revealed multiple bilateral peripheral lung nodules and there were no endobronchial lesions on flexible bronchoscopy...
August 2017: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28880220/real-time-two-dimensional-magnetic-particle-imaging-for-electromagnetic-navigation-in-targeted-drug-delivery
#11
Tuan-Anh Le, Xingming Zhang, Ali Kafash Hoshiar, Jungwon Yoon
Magnetic nanoparticles (MNPs) are effective drug carriers. By using electromagnetic actuated systems, MNPs can be controlled noninvasively in a vascular network for targeted drug delivery (TDD). Although drugs can reach their target location through capturing schemes of MNPs by permanent magnets, drugs delivered to non-target regions can affect healthy tissues and cause undesirable side effects. Real-time monitoring of MNPs can improve the targeting efficiency of TDD systems. In this paper, a two-dimensional (2D) real-time monitoring scheme has been developed for an MNP guidance system...
September 7, 2017: Sensors
https://www.readbyqxmd.com/read/28877801/using-electromagnetic-navigation-bronchoscopy-and-dye-injection-to-aid-in-video-assisted-lung-resection
#12
Jordan Brown, Thomas J Lee, Theresa Joiner, William Wrightson
Small (2 cm) peripheral lung lesions and ground glass opacities remain a difficult subset of lung lesions for the diagnosis and management of lung cancer. Surgical biopsy is more difficult for these lesions because intraoperative localization has to be made without the aid of direct visualization or manual palpation. Electromagnetic navigation bronchoscopy can be used in the operating room to identify a small peripheral lesion and marked using an injection of methylene blue, which can be seen on the visceral pleura of the lung...
November 1, 2016: American Surgeon
https://www.readbyqxmd.com/read/28871368/infected-multilocular-hydrocephalus-treated-by-rigid-and-flexible-endoscopes-with-electromagnetic-guided-neuronavigation-a-case-report
#13
Ryuji Ishizaki, Yuzuru Tashiro
BACKGROUND: Endoscopic surgery assisted by a navigation system has greatly aided treatment of infected multilocular hydrocephalus, especially in children. CASE REPORT: We describe a 2-year-old boy with multilocular hydrocephalus caused by repeated shunt infection, presenting with fever and vomiting. Magnetic resonance images (MRI) showed extraventricular cysts and severe ventricular deformity. There were three ventriculoperitoneal shunts and one residual ventricular catheter...
September 4, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28870648/can-electromagnetic-navigated-maxillary-positioning-replace-occlusional-splints-in-orthognathic-surgery-a-clinical-pilot-study
#14
Moritz Berger, Igor Nova, Sebastian Kallus, Oliver Ristow, Christian Freudlsperger, Urs Eisenmann, Hartmut Dickhaus, Michael Engel, Jürgen Hoffmann, Robin Seeberger
INTRODUCTION: Because of the inaccuracy of intermaxillary splints in orthognathic surgery, intraoperative guidance via a real time navigation system might represent a suitable method for enhancing the precision of maxillary positioning. Therefore, in this clinical trial, maxillary repositioning after Le Fort I osteotomy was guided splintless by an electromagnetic navigation system. MATERIALS AND METHODS: Conservatively planned maxillary reposition in each of 5 patients was transferred to a novel software module of the electromagnetic navigation system...
October 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28821949/electromagnetically-navigated-in-situ-fenestration-of-aortic-stent-grafts-pilot-animal-study-of-a-novel-fenestrated-evar-approach
#15
Tobias Penzkofer, Hong-Sik Na, Peter Isfort, Christoph Wilkmann, Sabine Osterhues, Andreas Besting, Christoph Hänisch, Stefan Bisplinghoff, Johannes Jansing, Sylvie von Werder, Jorge Gooding, Mathias de la Fuente, Andreas H Mahnken, Catherine Disselhorst-Klug, Thomas Schmitz-Rode, Christiane Kuhl, Philipp Bruners
PURPOSE: Assess electromagnetically guided in situ fenestration of juxtarenal aortic stent grafts in an in vivo model. METHODS: Using a newly developed electromagnetic guidance system together with a modified, electromagnetically guidable catheter with steerable tip, an electromagnetically trackable guidewire and a custom in situ fenestrateable stent graft, a series of seven animal experiments was performed. In a swine model, stent grafts were placed juxtarenally, covering the renal arteries...
August 18, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28807088/posterior-translacrimal-approach-to-the-maxillary-sinus
#16
COMPARATIVE STUDY
D Dönmez, E Giotakis, W G Hosemann, T S Kühnel, B Hirt, R K Weber
BACKGROUND: This study aimed to compare the view into the maxillary sinus using the posterior translacrimal approach compared with grade 3 antrostomy. METHODS: Grade 3 antrostomy followed by a posterior translacrimal approach was performed on four cadavers. The maximum intramaxillary view was documented endoscopically guided by electromagnetic navigation. Representative screenshots were evaluated in a blinded manner by three independent sinus surgeons. In addition, a prospective investigation of specific complications in the post-operative course of consecutive patients was performed...
October 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28803481/autonomous-collision-free-navigation-of-microvehicles-in-complex-and-dynamically-changing-environments
#17
Tianlong Li, Xiaocong Chang, Zhiguang Wu, Jinxing Li, Guangbin Shao, Xinghong Deng, Jianbin Qiu, Bin Guo, Guangyu Zhang, Qiang He, Longqiu Li, Joseph Wang
Self-propelled micro- and nanoscale robots represent a rapidly emerging and fascinating robotics research area. However, designing autonomous and adaptive control systems for operating micro/nanorobotics in complex and dynamically changing environments, which is a highly demanding feature, is still an unmet challenge. Here we describe a smart microvehicle for precise autonomous navigation in complicated environments and traffic scenarios. The fully autonomous navigation system of the smart microvehicle is composed of a microscope-coupled CCD camera, an artificial intelligence planner, and a magnetic field generator...
September 26, 2017: ACS Nano
https://www.readbyqxmd.com/read/28777130/electromagnetic-navigational-bronchoscopy-reduces-the-time-required-for-localization-and-resection-of-lung-nodules
#18
William David Bolton, Thomas Cochran, Sharon Ben-Or, James E Stephenson, William Ellis, Allyson L Hale, Andrew P Binks
OBJECTIVE: The aims of the study were to evaluate electromagnetic navigational bronchoscopy (ENB) and computed tomography-guided placement as localization techniques for minimally invasive resection of small pulmonary nodules and determine whether electromagnetic navigational bronchoscopy is a safer and more effective method than computed tomography-guided localization. METHODS: We performed a retrospective review of our thoracic surgery database to identify patients who underwent minimally invasive resection for a pulmonary mass and used either electromagnetic navigational bronchoscopy or computed tomography-guided localization techniques between July 2011 and May 2015...
September 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28770838/observation-of-the-hyperfine-spectrum-of-antihydrogen
#19
M Ahmadi, B X R Alves, C J Baker, W Bertsche, E Butler, A Capra, C Carruth, C L Cesar, M Charlton, S Cohen, R Collister, S Eriksson, A Evans, N Evetts, J Fajans, T Friesen, M C Fujiwara, D R Gill, A Gutierrez, J S Hangst, W N Hardy, M E Hayden, C A Isaac, A Ishida, M A Johnson, S A Jones, S Jonsell, L Kurchaninov, N Madsen, M Mathers, D Maxwell, J T K McKenna, S Menary, J M Michan, T Momose, J J Munich, P Nolan, K Olchanski, A Olin, P Pusa, C Ø Rasmussen, F Robicheaux, R L Sacramento, M Sameed, E Sarid, D M Silveira, S Stracka, G Stutter, C So, T D Tharp, J E Thompson, R I Thompson, D P van der Werf, J S Wurtele
The observation of hyperfine structure in atomic hydrogen by Rabi and co-workers and the measurement of the zero-field ground-state splitting at the level of seven parts in 10(13) are important achievements of mid-twentieth-century physics. The work that led to these achievements also provided the first evidence for the anomalous magnetic moment of the electron, inspired Schwinger's relativistic theory of quantum electrodynamics and gave rise to the hydrogen maser, which is a critical component of modern navigation, geo-positioning and very-long-baseline interferometry systems...
August 2, 2017: Nature
https://www.readbyqxmd.com/read/28758547/design-of-a-sensorized-guiding-catheter-for-in-situ-laser-fenestration-of-endovascular-stent
#20
Roberta Piazza, Sara Condino, Aldo Alberti, Raffaella Nice Berchiolli, Gioachino Coppi, Marco Gesi, Vincenzo Ferrari, Mauro Ferrari
PURPOSE: The in situ fenestration of a standard endograft is currently limited by difficulties in targeting the fenestration site under fluoroscopic control and by the lack of a safe method to perforate the graft. Evidence in the literature suggests the use of a 3 D electromagnetic navigator to accurately guide the endovascular instruments to the target and a laser to selectively perforate the graft. The aim of this work is to provide design guidelines to develop a sensorized catheter to guide the laser tool to the fenestration site and conduct preliminary testing of the feasibility of the proposed solution...
December 2017: Computer Assisted Surgery (Abingdon, England)
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