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https://www.readbyqxmd.com/read/28813969/prediction-of-user-preference-over-shared-control-paradigms-for-a-robotic-wheelchair
#1
Ahmetcan Erdogan, Brenna D Argall
The design of intelligent powered wheelchairs has traditionally focused heavily on providing effective and efficient navigation assistance. Significantly less attention has been given to the end-user's preference between different assistance paradigms. It is possible to include these subjective evaluations in the design process, for example by soliciting feedback in post-experiment questionnaires. However, constantly querying the user for feedback during real-world operation is not practical. In this paper, we present a model that correlates objective performance metrics and subjective evaluations of autonomous wheelchair control paradigms...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28808622/radiation-exposure-and-reduction-in-the-operating-room-perspectives-and-future-directions-in-spine-surgery
#2
REVIEW
Ankur S Narain, Fady Y Hijji, Kelly H Yom, Krishna T Kudaravalli, Brittany E Haws, Kern Singh
Intraoperative imaging is vital for accurate placement of instrumentation in spine surgery. However, the use of biplanar fluoroscopy and other intraoperative imaging modalities is associated with the risk of significant radiation exposure in the patient, surgeon, and surgical staff. Radiation exposure in the form of ionizing radiation can lead to cellular damage via the induction of DNA lesions and the production of reactive oxygen species. These effects often result in cell death or genomic instability, leading to various radiation-associated pathologies including an increased risk of malignancy...
July 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28797980/can-fan-beam-ict-accurately-predict-indirect-decompression-in-miss-fusion-procedures
#3
Insa Janssen, Gernot Lang, Rodrigo Navarro-Ramirez, Ajit Jada, Connor Berlin, Aaron Hilis, Micaella Zubkov, Lena Gandevia, Roger Härtl
BACKGROUND: Recently, a novel mobile intraoperative fan-beam CT (iFBCT) was introduced, allowing for real time navigation and immediate intraoperative evaluation of neural decompression in spine surgery. This study sought to investigate whether intraoperatively assessed neural decompression during minimally invasive spine surgery (MISS) has a predictive value for clinical and radiographic outcome. METHODS: A retrospective study of patients undergoing iCT-guided extreme lateral interbody fusion (XLIF) or transforaminal lumbar interbody fusion (TLIF) was conducted...
August 7, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28790477/pediatric-lumbar-pedicle-screw-placement-using-navigation-templates-a-cadaveric-study
#4
Xing Wang, Jun Shi, Shojie Zhang, Zhifeng Zhang, Xiaohe Li, Zhijun Li
BACKGROUND: Pedicle screw technique is commonly used treatment of adult spinal trauma, tumor, degeneration. The application of pedicle screws is very challenging in children because children have a fast growing spine and spinal pedicle morphology of children and adult has large difference. 3 D reconstruction individual navigation templates improve the success rate of pediatric pedicle screw system. This study is aimed to provide a precise method for lumbar spine pedicle screw placement in children using computer-aided design and rapid prototyping technology...
July 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28790007/targeted-epidural-blood-patch-under-o-arm-guided-stereotactic-navigation-in-patients-with-intracranial-hypotension-associated-with-a-spinal-csf-leak-and-ventral-dural-defect
#5
Keisuke Takai, Makoto Taniguchi
OBJECTIVE: Targeted epidural blood patch (EBP) at the site of a presumed cerebrospinal fluid leak reportedly has better outcomes than non-targeted EBP; however, it is associated with a higher risk of wrong-site injection such as iatrogenic subarachnoid or intramuscular injections, which lead to reintervention due to the insufficient coverage of injected blood. METHODS: Eight patients with intracranial hypotension due to a CSF leak diagnosed by myelographic CT and thin-cut MRI received an epidural blood patch under O-arm-guided stereotactic navigation...
August 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28789957/mini-open-spinal-column-shortening-for-the-treatment-of-adult-tethered-cord-syndrome
#6
Michael M Safaee, Ethan A Winkler, Dean Chou
Tethered cord syndrome (TCS) is a challenging entity characterized by adhesions at the caudal spinal cord that prevent upward movement during growth and result in stretching of the cord with a concomitant constellation of neurologic symptoms. Although growth in height stops in adulthood, some patients still develop progressive symptoms; many underwent detethering as a child or adolescent, resulting in significant scar tissue and re-tethering. Recent strategies have focused on spinal column shortening to reduce tension on the spinal cord without exposing the previous de-tethering site...
August 5, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28766023/how-i-do-it-optimizing-radiofrequency-ablation-in-spinal-metastases-using-ict-and-navigation
#7
Pujan Kavakebi, C F Freyschlag, C Thomé
BACKGROUND: Exact positioning of the radiofrequency ablation (RFA) probe for tumor treatment under fluoroscopic guidance can be difficult because of potentially small inaccessible lesions and the radiation dose to the medical staff in RFA. In addition, vertebroplasty (VP) can be significantly high. METHOD: Description and workflow of RFA in spinal metastasis using iCT (intraoperative computed tomography) and 3D-navigation-based probe placement followed by VP. CONCLUSION: RFA and VP can be successfully combined with iCT-based navigation, which leads to a reduction of radiation to the staff and optimal probe positioning due to 3D navigation...
August 1, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28760033/minimally-invasive-guidewireless-navigated-pedicle-screw-placement-a-technical-report-and-case-series
#8
Brandon W Smith, Jacob R Joseph, Michael Kirsch, Mary Oakley Strasser, Jacob Smith, Paul Park
OBJECTIVE Percutaneous pedicle screw insertion (PPSI) is a mainstay of minimally invasive spinal surgery. Traditionally, PPSI is a fluoroscopy-guided, multistep process involving traversing the pedicle with a Jamshidi needle, placement of a Kirschner wire (K-wire), placement of a soft-tissue dilator, pedicle tract tapping, and screw insertion over the K-wire. This study evaluates the accuracy and safety of PPSI with a simplified 2-step process using a navigated awl-tap followed by navigated screw insertion without use of a K-wire or fluoroscopy...
August 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28747385/spinal-racgap-%C3%AE-chimaerin-is-required-to-establish-the-midline-barrier-for-proper-corticospinal-axon-guidance
#9
Shota Katori, Yukiko Noguchi-Katori, Shigeyoshi Itohara, Takuji Iwasato
In the developing central nervous system, the midline barrier, which comprises guidance molecule-expressing midline glial somata and processes, plays a pivotal role in midline axon guidance. Accumulating evidence has revealed the molecular mechanisms by which the midline barrier ensures proper midline guidance for axons. In contrast, the mechanisms for establishing the midline barrier remain obscure. Here we report that RacGAP α-chimaerin (α-chimerin) is required for both axonal repulsion at and establishment of the midline barrier in the spinal cord...
July 26, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28746132/three-dimensional-cross-platform-planning-for-complex-spinal-procedures-a-new-method-adaptive-to-different-navigation-systems
#10
Michael Kosterhon, Angelika Gutenberg, Sven R Kantelhardt, Jens Conrad, Amr Nimer Amr, Joachim Gawehn, Alf Giese
STUDY DESIGN: A feasibility study. OBJECTIVE: To develop a method based on the DICOM standard which transfers complex 3-dimensional (3D) trajectories and objects from external planning software to any navigation system for planning and intraoperative guidance of complex spinal procedures. SUMMARY OF BACKGROUND DATA: There have been many reports about navigation systems with embedded planning solutions but only few on how to transfer planning data generated in external software...
August 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28743881/wnt-signaling-controls-pro-regenerative-collagen-xii-in-functional-spinal-cord-regeneration-in-zebrafish
#11
Daniel Wehner, Themistoklis M Tsarouchas, Andria Michael, Christa Haase, Gilbert Weidinger, Michell M Reimer, Thomas Becker, Catherina G Becker
The inhibitory extracellular matrix in a spinal lesion site is a major impediment to axonal regeneration in mammals. In contrast, the extracellular matrix in zebrafish allows substantial axon re-growth, leading to recovery of movement. However, little is known about regulation and composition of the growth-promoting extracellular matrix. Here we demonstrate that activity of the Wnt/β-catenin pathway in fibroblast-like cells in the lesion site is pivotal for axon re-growth and functional recovery. Wnt/β-catenin signaling induces expression of col12a1a/b and deposition of Collagen XII, which is necessary for axons to actively navigate the non-neural lesion site environment...
July 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28741148/simultaneous-navigated-cervico-thoracic-and-thoraco-lumbar-fixation
#12
Krunal Patel, Tamara Tajsic, Karol P Budohoski, Mathew R Guilfoyle, Rikin A Trivedi
STUDY DESIGN: Case report. OBJECTIVE: To investigate the feasibility of using two independent image guidance systems to simultaneously fix multiple segment spine fractures. Image guidance is increasingly used to aid spinal fixation. We describe the first use of multiple navigation systems during a single procedure allowing for multi-segment spinal fixations to be performed simultaneously and capitalizing the advantages of navigation. METHOD: Two Medtronic Stealth Station S7™ systems with O-arm image capture were used to guide fixation of C6 and T12, unstable, AO A4, three-column fractures, in a patient with ankylosing spondylitis...
July 24, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28735464/radiation-dose-reduction-in-thoracic-and-lumbar-spine-instrumentation-using-navigation-based-on-an-intraoperative-cone-beam-ct-imaging-system-a-prospective-randomized-clinical-trial
#13
Nathalie Pireau, Virginie Cordemans, Xavier Banse, Nadia Irda, Sébastien Lichtherte, Ludovic Kaminski
PURPOSE: Spine surgery still remains a challenge for every spine surgeon, aware of the potential serious outcomes of misplaced instrumentation. Though many studies have highlighted that using intraoperative cone beam CT imaging and navigation systems provides higher accuracy than conventional freehand methods for placement of pedicle screws in spine surgery, few studies are concerned about how to reduce radiation exposure for patients with the use of such technology. One of the main focuses of this study is based on the ALARA principle (as low as reasonably achievable)...
July 22, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28728206/-subaxial-cervical-spine-injuries-treatment-recommendations-of-the-german-orthopedic-and-trauma-society
#14
Philipp Schleicher, Matti Scholz, Frank Kandziora, Andreas Badke, Florian Hans Brakopp, Helmut Klaus Friedrich Ekkerlein, Erol Gercek, Rene Hartensuer, Philipp Hartung, Jan-Sven Gilbert Jarvers, Philipp Kobbe, Stefan Matschke, Robert Morrison, Christian W Müller, Miguel Pishnamaz, Maximilian Reinhold, Klaus John Schnake, Gregor Schmeiser, Gregor Stein, Bernhard Ullrich, Thomas Weiß, Volker Zimmermann
In a consensus process during four sessions in 2016, the working group "lower cervical spine" of the German Society for Orthopedic and Trauma Surgery (DGOU), formulated "Therapeutic Recommendations for the Lower Cervical Spine", taking into consideration the current literature. Therapeutic goals are a permanently stable, painless cervical spine and the protection against secondary neurologic damage while retaining the greatest possible amount of motion and spinal profile. Due to its ease of use and its proven good reliability, the AOSpine classification for subaxial cervical injuries should be used...
July 20, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28715331/the-importance-of-haptics-in-generating-exoskeleton-gait-trajectory-using-alternate-motor-inputs
#15
Kiran K Karunakaran, Kevin M Abbruzzese, Hao Xu, Richard A Foulds
Human gait requires both haptic and visual feedback to generate and control rhythmic movements, and navigate environmental obstacles. Current lower extremity wearable exoskeletons that restore gait to individuals with paraplegia due to spinal cord injury rely completely on visual feedback to generate limited pre-programmed gait-variations, and generally provide little control by the user over the gait cycle. As an alternative to this limitation, we propose user control of gait in real time using healthy upper extremities...
July 13, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28710046/image-guidance-to-aid-pedicle-screw-fixation-of-a-lumbar-fracture-dislocation-injury-in-a-toddler
#16
John K Houten, Jonathan Nahkla, Shashank Ghandi
BACKGROUND: Pedicle screw fixation of the lumbar spine in children less than two years of age is particularly challenging, as successful cannulation of the small pedicle dimensions require a high level of precision and there are no implants specifically designed for the infantile spine. Image-guided navigation is commonly used in adult spinal surgery and may be particularly helpful for placement of spinal screws where the bony anatomy is small and/or anatomically complex as in the upper cervical area...
July 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28710043/minimally-invasive-computer-navigation-assisted-endoscopic-transforaminal-interbody-fusion-with-bilateral-decompression-via-a-unilateral-approach-initial-clinical-experience-at-one-year-follow-up
#17
Yaqing Zhang, Chuang Xu, Yue Zhou, Bo Huang
OBJECTIVE: The purpose of this study was to assess the feasibility of minimally invasive transforaminal lumbar interbody fusion (TLIF) and bilateral decompression via a unilateral approach that was performed with a novel working retractor with an endoscopic system for degenerative lumbar spondylolisthesis associated with spinal stenosis, to minimize surgical trauma without compromising the quality of the treatment outcome. METHODS: In this case series, the procedure was performed in 17 patients...
July 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28673199/accuracy-of-pedicle-screw-placement-based-on-preoperative-computed-tomography-versus-intraoperative-data-set-acquisition-for-spinal-navigation-system
#18
Hao Liu, Weikai Chen, Tao Liu, Bin Meng, Huilin Yang
AIM: To investigate the accuracy of pedicle screw placement based on preoperative computed tomography in comparison with intraoperative data set acquisition for spinal navigation system. METHODS: The PubMed (MEDLINE), EMBASE, and Web of Science were systematically searched for the literature published up to September 2015. This review followed the Preferred Reporting Items for Systematic Reviews and Meta-analysis guidelines. Statistical analysis was performed using the Review Manager 5...
May 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28656505/videoexoscopic-real-time-intraoperative-navigation-for-spinal-neurosurgery-a-novel-co-adaptation-of-two-existing-technology-platforms-technical-note
#19
Meng Huang, Sean Michael Barber, William James Steele, Zain Boghani, Viren Rajendrakumar Desai, Gavin Wayne Britz, George Alexander West, Todd Wilson Trask, Paul Joseph Holman
Image-guided approaches to spinal instrumentation and interbody fusion have been widely popularized in the last decade [1-5]. Navigated pedicle screws are significantly less likely to breach [2, 3, 5, 6]. Navigation otherwise remains a point reference tool because the projection is off-axis to the surgeon's inline loupe or microscope view. The Synaptive robotic brightmatter drive videoexoscope monitor system represents a new paradigm for off-axis high-definition (HD) surgical visualization. It has many advantages over the traditional microscope and loupes, which have already been demonstrated in a cadaveric study [7]...
June 27, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28634552/inherited-paediatric-motor-neuron-disorders-beyond-spinal-muscular-atrophy
#20
REVIEW
Hooi Ling Teoh, Kate Carey, Hugo Sampaio, David Mowat, Tony Roscioli, Michelle Farrar
Paediatric motor neuron diseases encompass a group of neurodegenerative diseases characterised by the onset of muscle weakness and atrophy before the age of 18 years, attributable to motor neuron loss across various neuronal networks in the brain and spinal cord. While the genetic underpinnings are diverse, advances in next generation sequencing have transformed diagnostic paradigms. This has reinforced the clinical phenotyping and molecular genetic expertise required to navigate the complexities of such diagnoses...
2017: Neural Plasticity
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