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https://www.readbyqxmd.com/read/28068277/initial-experience-with-o-arm-navigated-spinal-surgery-report-on-two-cases
#1
Ivo I Kehayov, Christo B Zhelyazkov, Borislav M Kalnev, Atanas N Davarski, Borislav D Kitov, Stefan D Raykov
Image-guided spinal surgery is becoming increasingly popular because it allows surgeons to achieve minimal invasiveness and maximum precision in the performed procedures. We present our initial experience with two cases operated on using O-arm-based spinal navigation at the Clinic of Neurosurgery in St George University Hospital, Plovdiv, Bulgaria. In the first case, we performed removal of extradural spinal tumor of the sixth thoracic vertebra and O-arm-navigated pedicle screw fixation. In the second case, we performed O-arm-navigated corpectomy of the fifth cervical vertebra and anterior spinal reconstruction and fusion with titanium expandable mesh and cervical plate in connection with degenerative narrowing of the cervical spinal canal that lead to clinically manifested myelopathy...
December 1, 2016: Folia Medica
https://www.readbyqxmd.com/read/28047736/su-f-p-42-to-navigate-or-not-to-navigate-hdr-bt-in-recurrent-spine-lesions
#2
L Voros, G Cohen, M Zaider, Y Yamada
PURPOSE: We compare the accuracy of HDR catheter placement for paraspinal lesions using O-arm CBCT imaging combined with StealthStation navigation and traditional fluoroscopically guided catheter placement. METHODS: CT and MRI scans were acquired pre-treatment to outline the lesions and design treatment plans (pre-plans) to meet dosimetric constrains. The pre-planned catheter trajectories were transferred into the StealthStation Navigation system prior to the surgery...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27965053/the-spinal-cord-shows-the-way-how-axons-navigate-intermediate-targets
#3
REVIEW
Gemma de Ramon Francàs, Nikole R Zuñiga, Esther T Stoeckli
Functional neural circuits depend on the establishment of specific connections between neurons and their target cells. To this end, many axons have to travel long distances to reach their target cells during development. Studies addressing the molecular mechanisms of axon guidance have to overcome the complexity of subpopulation-specific requirements with respect to pathways, guidance cues, and target recognition. Compared to the brain, the relatively simple structure of the spinal cord provides an advantage for experimental studies of axon guidance mechanisms...
December 10, 2016: Developmental Biology
https://www.readbyqxmd.com/read/27955617/planar-cell-polarity-genes-frizzled3a-vangl2-and-scribble-are-required-for-spinal-commissural-axon-guidance
#4
Simon D Sun, Ashley M Purdy, Gregory S Walsh
BACKGROUND: A fundamental feature of early nervous system development is the guidance of axonal projections to their targets in order to assemble neural circuits that control behavior. Spinal commissural neurons are an attractive model to investigate the multiple guidance cues that control growth cone navigation both pre- and post-midline crossing, as well as along both the dorsal-ventral (D-V) and anterior-posterior (A-P) axes. Accumulating evidence suggests that guidance of spinal commissural axons along the A-P axis is dependent on components of the planar cell polarity (PCP) signaling pathway...
December 12, 2016: BMC Neuroscience
https://www.readbyqxmd.com/read/27847133/c1-lateral-mass-screw-insertion-caudally-from-c2-nerve-root-an-alternate-method-for-insertion-of-c1-screws-a-technical-note-and-preliminary-clinical-results
#5
Keiji Wada, Ryo Tamaki, Mitsuru Yui, Daisuke Numaguchi, Yasuaki Murata
BACKGROUND: C1 lateral mass screw was widely used for fixation of the upper cervical spine. However, massive bleeding from the C1-2 venous plexus is sometimes encountered. In this study, we proposed an alternate method for C1 lateral mass screw insertion, which involves insertion of the screws caudally from the C2 nerve root to reduce bleeding from C1-2 venous plexus. METHODS: Seven patients with atlantoaxial lesions were included in this study. The mean age at surgery was 65...
November 12, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27846359/-o-arm-navigation-in-spinal-surgery-for-complex-cases
#6
D Pescador, D Rendón, J Blanco, R González, J M Martín, C Cano-Gala, D Pescador
The intraoperative computer-assisted navigation technique has evolved and changed the way we approach certain complex cases in the vertebral pathologies. The main advantages of this technique are that it increases the accuracy of the procedure, reduces its morbidity and invasiveness, diminishes the radiation dose and improves surgical protocols. In addition to the transpedicular fixation, the navigation system is useful in a high variety of pathologies such as spinal decompression or tumor resection. In the present study, we show several cases where navigation is used intraoperatively in different pathologies and their clinical outcomes...
March 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/27832013/surgical-resection-of-osteoid-osteoma-and-osteoblastoma-of-the-spine
#7
Muayad Kadhim, Odion Binitie, Patrick O'Toole, Emmanouil Grigoriou, Camila B De Mattos, John P Dormans
: Intraoperative radiographic guidance has traditionally been utilized in orthopedic surgery through 2-D navigation with the C-arm and recently with 3-D navigation with the O-arm. The aim of this study was to describe the outcome of surgical treatment of spinal osteoblastoma and osteoid osteoma with the utilization of the O-arm and conventional C-arm guidance. This is a retrospective cohort study of patients with spinal osteoid osteoma and or osteoblastoma who were treated at our institution between 2002 and 2011...
November 9, 2016: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/27779161/three-dimensional-fluoroscopy-based-navigation-for-the-pedicle-screw-placement-in-patients-with-primary-invasive-spinal-tumors
#8
Bo Jin, Yi-Bing Su, Ji-Zong Zhao
BACKGROUND: Although pedicle screw placement (PSP) is a well-established technique for spine surgery, the treatment of patients with primary invasive spinal tumor (PIST) has high surgical risks secondary to destroyed pedicles. Intraoperative three-dimensional fluoroscopy-based navigation (ITFN) system permits safe and accurate instrumentation of the spine with the advantage of obtaining intraoperative real-time three-dimensional images and automatic registration. The aim of this study is to evaluate the feasibility and accuracy of PSP using ITFN system for patients afflicted with PIST in the thoracic spine...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27777052/spinal-intra-operative-three-dimensional-navigation-correlation-between-clinical-and-absolute-engineering-accuracy
#9
Daipayan Guha, Raphael Jakubovic, Shaurya Gupta, Naif M Alotaibi, David Cadotte, Leodante B da Costa, Rajeesh George, Chris Heyn, Peter Howard, Anish Kapadia, Jesse M Klostranec, Nicolas Phan, Gamaliel Tan, Todd G Mainprize, Albert Yee, Victor X D Yang
BACKGROUND CONTEXT: Spinal intra-operative computer-assisted navigation (CAN) may guide pedicle screw placement. CAN techniques have been reported to reduce pedicle screw breach rates across all spinal levels. However, definitions of screw breach vary widely across studies, if reported at all. The absolute quantitative error of spinal navigation systems is theoretically a more precise and generalizable metric of navigation accuracy. It has also been computed variably, and reported in fewer than a quarter of clinical studies of CAN-guided pedicle screw accuracy...
October 21, 2016: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/27743248/use-of-the-brainlab-disposable-stylet-for-endoscope-and-peel-away-navigation
#10
Jane Halliday, Ian Kamaly
BACKGROUND: Neuronavigation, the ability to perform real-time intra-operative guidance during cranial and/or spinal surgery, has increased both accuracy and safety in neurosurgery [2]. Cranial navigation of existing surgical instruments using Brainlab requires the use of an instrument adapter and clamp, which in our experience renders an endoscope 'top-heavy', difficult to manipulate, and the process of registration of the adapter quite time-consuming. METHODS: A Brainlab Disposable Stylet was used to navigate fenestration of an entrapped temporal horn in a pediatric case...
October 14, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27699203/control-of-pedicle-screw-placement-with-an-electrical-conductivity-measurement-device-initial-evaluation-in-the-thoracic-and-lumbar-spine
#11
Olaf Suess, Markus Schomacher
Aim. Transpedicular screw fixation is widely used in spinal surgery. But the insertion of pedicle screws can sometimes be challenging because of the variability in pedicle size and the proximity of nerve roots. Methods. We detected intraoperatively the sensitivity for iatrogenic pedicel perforation with a hand-held electronic conductivity measurement device (ECD) that measures electrical conductivity of tissue-medium surrounding the instrument tip. ECD was used to guide the placement of 84 pedicle screws in 15 patients undergoing surgery for tumor or degenerative spinal disease at various spinal levels from T8 to L5...
2016: Advances in Medicine
https://www.readbyqxmd.com/read/27649314/evaluation-of-the-rosa%C3%A2-spine-robot-for-minimally-invasive-surgical-procedures
#12
M Lefranc, J Peltier
The ROSA® robot (Medtech, Montpellier, France) is a new medical device designed to assist the surgeon during minimally invasive spine procedures. The device comprises a patient-side cart (bearing the robotic arm and a workstation) and an optical navigation camera. The ROSA® Spine robot enables accurate pedicle screw placement. Thanks to its robotic arm and navigation abilities, the robot monitors movements of the spine throughout the entire surgical procedure and thus enables accurate, safe arthrodesis for the treatment of degenerative lumbar disc diseases, exactly as planned by the surgeon...
October 2016: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/27646696/-intraoperative-3d-imaging-in-spinal-surgery
#13
O Gonschorek, S Hauck, V Bühren
BACKGROUND: Intraoperative imaging during spinal interventions has experienced significant developments over the last two decades. By the introduction of flat screen detectors, 3D imaging has been made possible and easier and by developing compact and mobile systems computed tomography can even be used in the operating theater. OBJECTIVE: Presentation of modern intraoperative 3D imaging and navigation in spinal surgery. MATERIAL AND METHODS: The techniques of intraoperative 3D imaging and navigation during spinal procedures are presented based on the currently available literature and own experiences at a German national spine and trauma center...
October 2016: Der Unfallchirurg
https://www.readbyqxmd.com/read/27591770/navigation-improves-the-learning-curve-of-transforamimal-percutaneous-endoscopic-lumbar-discectomy
#14
Guoxin Fan, Ruoshuang Han, Xin Gu, Hailong Zhang, Xiaofei Guan, Yunshan Fan, Teng Wang, Shisheng He
PURPOSE: Beginners usually need increased punctures and dozens of fluoroscopy in learning transforamimal percutaneous endoscopic lumbar discectomy (tPELD). Navigator-assisted spinal surgery (NASS) is a novel technique that could induce a definite trajectory. The retrospective study aimed to investigate the impact of a definite trajectory on the learning curve of tPELD. METHODS: A total of 120 patients with symptomatic lumbar disc herniation who received tPELD between 2012 and 2014...
September 3, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27584732/augmented-endoscopic-images-overlaying-shape-changes-in-bone-cutting-procedures
#15
Megumi Nakao, Shota Endo, Shinichi Nakao, Munehito Yoshida, Tetsuya Matsuda
In microendoscopic discectomy for spinal disorders, bone cutting procedures are performed in tight spaces while observing a small portion of the target structures. Although optical tracking systems are able to measure the tip of the surgical tool during surgery, the poor shape information available during surgery makes accurate cutting difficult, even if preoperative computed tomography and magnetic resonance images are used for reference. Shape estimation and visualization of the target structures are essential for accurate cutting...
2016: PloS One
https://www.readbyqxmd.com/read/27570904/-assessing-motor-cognition-interaction-of-patients-with-cognitive-disorders-clinical-aspects
#16
R Schniepp, M Wuehr, F Schöberl, A Zwergal
BACKGROUND: Difficulties of walking and deficits of cognitive functions appear to be associated in the elderly. Thus, clinical assessment in geriatry and neurology should focus on: (1) diagnostic approaches covering both domains of everyday functioning; (2) therapeutic interventions that take into account possible interactions and synergies of both domains. DISCUSSION: In order to assess the capability for motor-cognitive interactions in the elderly it is recommended to investigate walking patterns during dual-tasks (e...
August 2016: Fortschritte der Neurologie-Psychiatrie
https://www.readbyqxmd.com/read/27535635/a-low-cost-passive-navigation-training-system-for-image-guided-spinal-intervention
#17
Daniel Lorias-Espinoza, Vicente González Carranza, Fernando Chico-Ponce de León, Fernando Pérez Escamirosa, Arturo Minor Martinez
BACKGROUND: Navigation technology is used for training in various medical specialties, not least image-guided spinal interventions. Navigation practice is an important educational component that allows residents to understand how surgical instruments interact with complex anatomy and to learn basic surgical skills such as the tridimensional mental interpretation of bidimensional data. Inexpensive surgical simulators for spinal surgery, however, are lacking. We therefore designed a low-cost spinal surgery simulator (Spine MovDigSys 01) to allow 3-dimensional navigation via 2-dimensional images without altering or limiting the surgeon's natural movement...
November 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27532244/commissural-axon-navigation-control-of-midline-crossing-in-the-vertebrate-spinal-cord-by-the-semaphorin-3b-signaling
#18
Aurora Pignata, Hugo Ducuing, Valérie Castellani
The mechanisms governing the navigation of commissural axons during embryonic development have been extensively investigated in the past years, often using the drosophila ventral nerve cord and the spinal cord as model systems. Similarities but also specificities in the general strategies, the molecular signals as well as in the regulatory pathways controlling the response of commissural axons to the guidance cues have been found between species. Whether the semaphorin signaling contributes to midline crossing in the fly nervous system remains unknown, while in contrast, it does play a prominent contribution in vertebrates...
November 2016: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/27513224/ct-radiation-dose-reduction-in-robot-assisted-pediatric-spinal-surgery
#19
William F Sensakovic, Matthew Cody O'Dell, Ali Agha, Raymund Woo, Laura Varich
STUDY DESIGN: Retrospective Consecutive Cohort Series OBJECTIVE.: To develop a low-dose computed tomography (CT) protocol for use in robot-assisted pediatric spinal surgery. SUMMARY OF BACKGROUND DATA: CT scans are utilized preoperatively for preoperative planning, by navigation software during robot-assisted surgery, and postoperatively to assess surgical implant placement. Traditionally high radiation doses produced by CT scanning are a concern in the highly radiosensitive pediatric population...
August 10, 2016: Spine
https://www.readbyqxmd.com/read/27513166/surgical-navigation-technology-based-on-augmented-reality-and-integrated-3d-intraoperative-imaging-a-spine-cadaveric-feasibility-and-accuracy-study
#20
Adrian Elmi-Terander, Halldor Skulason, Michael Söderman, John Racadio, Robert Homan, Drazenko Babic, Nijs van der Vaart, Rami Nachabe
STUDY DESIGN: Cadaveric laboratory study. OBJECTIVE: To assess the feasibility and accuracy of thoracic pedicle screw placement using augmented reality surgical navigation (ARSN). SUMMARY OF BACKGROUND DATA: Recent advances in spinal navigation have shown improved accuracy in lumbosacral pedicle screw placement but limited benefits in the thoracic spine. 3D intraoperative imaging and instrument navigation may allow improved accuracy in pedicle screw placement, without the use of X-ray fluoroscopy, and thus opens the route to image-guided minimally invasive therapy in the thoracic spine...
August 4, 2016: Spine
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