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https://www.readbyqxmd.com/read/29457744/optimal-safe-implantation-corridors-in-feline-cervical-vertebrae-c2-t1-ct-study-in-16-domestic-shorthair-cats
#1
Irene Espadas, Thomas W Maddox, Felipe de Vicente
Objectives The objective of this study was to define safe corridors for the optimal placement of bicortical implants in the feline cervical spine (C2-T1) using CT. Methods CT images of feline cervical spines (n = 16) were reviewed retrospectively. Multiplanar reconstructions were used to define the optimal safe corridors. Safe corridors were defined by their angle of insertion, width and length. The insertion point within the vertebral body was also described. Vertebral measurements were compared between vertebrae using multilevel linear regression, and left and right measurements within vertebrae were compared with the paired samples Wilcoxon signed-rank test...
February 1, 2018: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/29457438/-ct-and-mri-manifestation-of-primary-spinal-large-b-cell-lymphoma
#2
Ping Tian, Kai Jiang, Zhi-Qiang Cai, Yong-Tao Wang, Sheng-de Deng
OBJECTIVE: To investigate CT and MRI characteristics of primary spinal large B cell lymphoma. METHODS: CT and MRI data of 23 patients with primary spinal large B cell lymphoma confirmed by histopathology were retrospectively analyzed from March 2011 to August 2015. Among them, including 14 males and 9 females aged from 28 to 70 years old with an average of 53.4 years old. The clinical manifestation mainly focus on pain around spinal and minority peripheral nerve symptom...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29457433/-effect-of-50-hz-1-8-mt-sinusoidal-electromagnetic-fields-on-bone-mineral-density-in-growing-rats
#3
Yu-Hai Gao, Yan-Feng Zhou, Shao-Feng Li, Wen-Yuan Li, Hui-Rong Xi, Fang-Fang Yang, Ke-Ming Chen
OBJECTIVE: To study effects of 50 Hz 1.8 mT sinusoidal electromagnetic fields (SEMFs) on bone mineral density (BMD) in SD rats. METHODS: Thirty SD rats weighted(110±10) and aged 1 month were randomly divided into control group and electromagnetic field group, 15 in each group. Normal control group of 50 Hz 0 mT density and sinusoidal electromagnetic field group of 50 Hz 1.8 mT were performed respectively with 1.5 h/d and weighted weight once a week, and observed food-intake...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29457415/-preliminary-study-of-intervention-in-effect-of-bushen-huoxue-recipe-on-calcification-of-lumbar-vertebra-cartilage-endplate-of-the-aging-gerbils
#4
Li-Guo Zhu, Ping Zhang, Qing-Hui Song, Wan-Qiang Zhang, Hong-Wei Zhu, Li-Ping Yang, Yan Zhu, Yuan Wang, Ling-Hui Li
OBJECTIVE: To study the effect of Bushen Huoxue decoction on calcification of cartilage endplate in lumbar vertebrae. METHODS: Six healthy male gerbils with 2-month-old were selected as normal control group, and 24 7-month-old healthy male gerbils were fed to 12-month-old to establish the aged gerbil model. Thirty gerbils were randomly divided into five groups as follow: the normal control group ( n =6), model group ( n =6, normal saline 4 ml/kg, intragastric 30 d), Bushen Huoxue low dose group( n =6, 1...
October 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29456892/under-the-armor-x-ray-computed-tomographic-reconstruction-of-the-internal-skeleton-of-coahomasuchus-chathamensis-archosauria-aetosauria-from-the-upper-triassic-of-north-carolina-usa-and-a-phylogenetic-analysis-of-aetosauria
#5
Devin K Hoffman, Andrew B Heckert, Lindsay E Zanno
Aetosauria is a clade of heavily armored, quadrupedal omnivorous to herbivorous archosaurs known from the Late Triassic across what was the supercontinent of Pangea. Their abundance in many deposits relative to the paucity of other Triassic herbivores indicates that they were key components of Late Triassic ecosystems. However, their evolutionary relationships remain contentious due, in large part, to their extensive dermal armor, which often obstructs observation of internal skeletal anatomy and limits access to potentially informative characters...
2018: PeerJ
https://www.readbyqxmd.com/read/29456172/effect-of-pediatric-growth-on-cervical-spine-kinematics-and-deformations-in-automotive-crashes
#6
Victor S Alvarez, Svein Kleiven
Finite element (FE) models are a powerful tool that can be used to understand injury mechanisms and develop better safety systems. This study aims to extend the understanding of pediatric spine biomechanics, where there is a paucity of studies available. A newly developed and continuously scalable FE model was validated and scaled to 1.5-, 3-, 6-, 10-, 14- and 18-year-old using a non-linear scaling technique, accounting for local topological changes. The oldest and youngest ages were also scaled using homogeneous geometric scaling...
February 8, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29455480/-application-of-guide-combined-with-probing-the-internal-wall-of-pedicle-screw-trajectory-for-subaxial-cervical-pedicle-screw-placement
#7
Bi-Hua Lai, Jian-Bin Wu, Hong Ye, Sen Luo
OBJECTIVE: To investigate the skill and evaluate the accuracy for application of guide combined with probing the internal wall of pedicle screw trajectory for subaxial cervical pedicle screw placement. METHODS: Subaxial cervical pedicle screw was inserted in 11 patients by the guide combined with probing the internal wall of pedicle screw trajectory from January 2014 to October 2016, including 7 males and 4 females with an average age of 48.1 years(ranged 32 to 63 years)...
September 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29455293/variations-of-transverse-foramina-in-cervical-vertebrae-what-happens-to-the-vertebral-artery
#8
Aristeidis Zibis, Vasileios Mitrousias, Nikolaos Galanakis, Nikoletta Chalampalaki, Dimitrios Arvanitis, Apostolos Karantanas
PURPOSE: The purpose of this study is to examine variations of the foramen transversarium and the vertebral artery in computed tomography angiographies (CTa) of the cervical spine, investigate their coexistence, and present possible considerations regarding such variations in spine surgical procedures. METHODS: Fifty CTa of the neck were retrospectively reviewed. Transverse and anteroposterior diameter of the foramen and diameter of the vertebral artery were measured...
February 17, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29455204/low-skeletal-muscle-density-is-associated-with-early-death-in-patients-with-perihilar-cholangiocarcinoma-regardless-of-subsequent-treatment
#9
Jeroen L A van Vugt, Marcia P Gaspersz, Jaynee Vugts, Stefan Buettner, Stef Levolger, Ron W F de Bruin, Wojciech G Polak, Jeroen de Jonge, François E J A Willemssen, Bas Groot Koerkamp, Jan N M IJzermans
BACKGROUND: Low skeletal muscle mass is associated with increased postoperative morbidity and worse survival following resection for perihilar cholangiocarcinoma (PHC). We investigated the predictive value of skeletal muscle mass and density for overall survival (OS) of all patients with suspected PHC, regardless of treatment. METHODS: Baseline characteristics and parameters regarding disease and treatment were collected from all patients with PHC from 2002 to 2014...
February 16, 2018: Digestive Surgery
https://www.readbyqxmd.com/read/29454129/delayed-post-traumatic-subacute-lumbar-subarachnoid-hematoma-case-report-and-review-of-the-literature
#10
Thiébaud Picart, Timothée Jacquesson, Emmanuel Jouanneau, Moncef Berhouma
BACKGROUND: Traumatic spinal subarachnoid hematoma, associated or not to a concurrent subdural hematoma has rarely been described. The evolution of such hematomas is heterogeneous. This study aims at defining the most accurate management which is currently not standardized. CASE DESCRIPTION: A 20-year-old man, victim of a high kinetic road accident five days before, suffering from several non-neurologic non-surgical vertebral fractures, complained of a sudden dorso-lumbar pain irradiating to his lower limbs...
February 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29453618/lumbosacral-transitional-vertebrae-significance-of-local-bone-marrow-edema-at-the-transverse-processes
#11
Mika T Nevalainen, Eoghan McCarthy, William B Morrison, Adam C Zoga, Johannes B Roedl
OBJECTIVE: To evaluate the association between low back pain and bone marrow edema in lumbosacral transitional vertebra (LSTV) transverse processes, and to assess the prevalence of LSTV in a physically active population. MATERIALS AND METHODS: Individuals with LSTV on coronal MRI studies were identified in a retrospective review by keyword search from PACS. In total, 140 cases were reviewed by two fellowship-trained musculoskeletal radiologists. Data on associated low back pain were collected from patient records at the time of the imaging...
February 16, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29452755/machine-learning-algorithms-based-on-signals-from-a-single-wearable-inertial-sensor-can-detect-surface-and-age-related-differences-in-walking
#12
B Hu, P C Dixon, J V Jacobs, J T Dennerlein, J M Schiffman
The aim of this study was to investigate if a machine learning algorithm utilizing triaxial accelerometer, gyroscope, and magnetometer data from an inertial motion unit (IMU) could detect surface- and age-related differences in walking. Seventeen older (71.5 ± 4.2 years) and eighteen young (27.0 ± 4.7 years) healthy adults walked over flat and uneven brick surfaces wearing an inertial measurement unit (IMU) over the L5 vertebra. IMU data were binned into smaller data segments using 4-s sliding windows with 1-s step lengths...
January 12, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29450848/automated-pathogenesis-based-diagnosis-of-lumbar-neural-foraminal-stenosis-via-deep-multiscale-multitask-learning
#13
Zhongyi Han, Benzheng Wei, Stephanie Leung, Ilanit Ben Nachum, David Laidley, Shuo Li
Pathogenesis-based diagnosis is a key step to prevent and control lumbar neural foraminal stenosis (LNFS). It conducts both early diagnosis and comprehensive assessment by drawing crucial pathological links between pathogenic factors and LNFS. Automated pathogenesis-based diagnosis would simultaneously localize and grade multiple spinal organs (neural foramina, vertebrae, intervertebral discs) to diagnose LNFS and discover pathogenic factors. The automated way facilitates planning optimal therapeutic schedules and relieving clinicians from laborious workloads...
February 15, 2018: Neuroinformatics
https://www.readbyqxmd.com/read/29446706/a-3d-finite-element-model-of-prophylactic-vertebroplasty-in-the-metastatic-spine-vertebral-stability-and-stress-distribution-on-adjacent-vertebrae
#14
Alessandra Berton, Giuseppe Salvatore, Hugo Giambini, Mauro Ciuffreda, Umile Giuseppe Longo, Vincenzo Denaro, Andrew Thoreson, Kai-Nan An
Background and Objective Patients with metastatically compromised vertebra can experience pathologic fracture with relevant neurological complications. Vertebroplasty is a low cost procedure and it can potentially prevent neurologic impairment if performed at an early stage. The aim of this study is to evaluate the effects of prophylactic vertebroplasty on stability of the metastatic spine and analyze load distribution at adjacent vertebrae. Setting A 3D finite element model of two spinal motion segments (L3-L5) was developed...
February 15, 2018: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29446467/morphological-integration-in-the-gorilla-chimpanzee-and-human-neck
#15
Mikel Arlegi, Aida Gómez-Robles, Asier Gómez-Olivencia
OBJECTIVES: Although integration studies are important to understand the evolution of organisms' traits across phylogenies, vertebral integration in primates is still largely unexplored. Here we describe and quantify patterns of morphological integration and modularity in the subaxial cervical vertebrae (C3-C7) in extant hominines incorporating the potential influence of size. MATERIALS AND METHODS: Three-dimensional landmarks were digitized on 546 subaxial cervical vertebrae from 141 adult individuals of Gorilla gorilla, Pan troglodytes, and Homo sapiens...
February 15, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29444669/effects-of-multilevel-posterior-ligament-dissection-after-spinal-instrumentation-on-adjacent-segment-biomechanics-as-a-potential-risk-factor-for-proximal-junctional-kyphosis-a-biomechanical-study
#16
Tobias Lange, Tobias L Schulte, Georg Gosheger, Albert Schulze Boevingloh, Raul Mayr, Werner Schmoelz
BACKGROUND: Spinous processes and posterior ligaments, such as inter- and supraspinous ligaments are often sacrificed either deliberately to harvest osseous material for final spondylodesis e.g. in deformity corrective surgery or accidentally after posterior spinal instrumentation. This biomechanical study evaluates the potential destabilizing effect of a progressive dissection of the posterior ligaments (PL) after instrumented spinal fusion as a potential risk factor for proximal junctional kyphosis (PJK)...
February 14, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29443957/bone-cement-augmented-short-segment-pedicle-screw-fixation-for-k%C3%A3-mmell-disease-with-spinal-canal-stenosis
#17
Yan-Sheng Huang, Chao-Yuan Ge, Hang Feng, Hai-Ping Zhang, Xing-Bang Niu, Shao-Yan Shi, Zi-Qi Zhu, Ding-Jun Hao
BACKGROUND This study aimed to explore the feasibility and efficacy of bone cement-augmented short-segmental pedicle screw fixation in treating Kümmell disease. MATERIAL AND METHODS From June 2012 to June 2015, 18 patients with Kümmell disease with spinal canal stenosis were enrolled in this study. Each patient was treated with bone cement-augmented short-segment fixation and posterolateral bone grafting, and posterior decompression was performed when needed. All patients were followed up for 12-36 months...
February 14, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29443765/clinical-significance-of-superior-articular-process-as-a-reference-point-for-free-hand-pedicle-screw-insertion-in-thoracic-spine
#18
Tae Hoon Kim, Suk Ha Lee, Jae Hyuk Yang, Jae Young Hong, Seung Woo Suh
The trajectory of the pedicle screw perpendicular to the SAP (superior articular process) is consistent with the universal trajectory presented in the previous study of the entry point using computed tomography. The ideal entry point and trajectory of pedicle screw insertion have been a matter of considerable debate. We attempted to find the relationship between SAP and entry point and trajectory of the pedicle screw.Thoracic spine CT (computed tomography) scans of 9 volunteers were studied. A safe zone for the trajectory of the screw in the axial (MarginAx) and sagittal (MarginSag) was defined as the zone between lines perpendicular to the SAP along the medial and lateral cortex of the pedicle in the axial section, and the superior and inferior cortex in the sagittal section without violation of the pedicle walls...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29443548/sex-and-bone-specific-responses-in-bone-structure-to-exogenous-leptin-and-leptin-receptor-antagonism-in-the-ovine-fetus
#19
Miles J De Blasio, Stuart A Lanham, Dominique Blache, Richard Oc Oreffo, Abigail L Fowden, Alison J Forhead
Widespread expression of leptin and its receptor in developing cartilage and bone suggests that leptin may regulate bone growth and development in the fetus. Using micro-computed tomography, this study investigated the effects of exogenous leptin and leptin receptor antagonism on aspects of bone structure in the sheep fetus during late gestation. From 125-130 days of gestation (term ~145 days), chronically-catheterised singleton sheep fetuses were infused intravenously for five days with either saline (0.9% saline, n=13), recombinant ovine leptin at two doses (0...
February 14, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29439863/towards-the-enhancement-of-body-standing-balance-recovery-by-means-of-a-wireless-audio-biofeedback-system
#20
Giovanni Costantini, Daniele Casali, Fabio Paolizzo, Marco Alessandrini, Alessandro Micarelli, Andrea Viziano, Giovanni Saggio
Human maintain their body balance by sensorimotor controls mainly based on information gathered from vision, proprioception and vestibular systems. When there is a lack of information, caused by pathologies, diseases or aging, the subject may fall. In this context, we developed a system to augment information gathering, providing the subject with warning audio-feedback signals related to his/her equilibrium. The system comprises an inertial measurement unit (IMU), a data processing unit, a headphone audio device and a software application...
February 10, 2018: Medical Engineering & Physics
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