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https://www.readbyqxmd.com/read/29458084/severe-pulmonary-embolism-secondary-to-cement-embolism-in-the-inferior-vena-cava-after-percutaneous-vertebroplasty
#1
Zhaoshun Yuan, Yangzhao Zhou, Xinmin Zhou, Xiaobo Liao
Cement pulmonary embolism (cPE) and inferior vena cava embolism (cIE) are rare but potentially life-threatening complications of percutaneous vertebroplasty (PVP). Most cPE and cIE occur simultaneously. In this case, a 65-year-old woman complained of dyspnea after PVP for 4 days. The patient's symptom and image tests manifested that the cPE was secondary to cIE. Even though the cIE was found on the first day after PVP, local surgeons treated the patient with a regular anticoagulant instead of more effective therapeutic measures...
February 16, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29457963/3-t-mr-imaging-of-proximal-femur-microarchitecture-in-subjects-with-and-without-fragility-fracture-and-nonosteoporotic-proximal-femur-bone-mineral-density
#2
Gregory Chang, Chamith S Rajapakse, Cheng Chen, Arakua Welbeck, Kenneth Egol, Ravinder R Regatte, Punam K Saha, Stephen Honig
Purpose To determine if 3-T magnetic resonance (MR) imaging of proximal femur microarchitecture can allow discrimination of subjects with and without fragility fracture who do not have osteoporotic proximal femur bone mineral density (BMD). Materials and Methods Sixty postmenopausal women (30 with and 30 without fragility fracture) who had BMD T scores of greater than -2.5 in the hip were recruited. All subjects underwent dual-energy x-ray absorptiometry to assess BMD and 3-T MR imaging of the same hip to assess bone microarchitecture...
February 19, 2018: Radiology
https://www.readbyqxmd.com/read/29457744/optimal-safe-implantation-corridors-in-feline-cervical-vertebrae-c2-t1-ct-study-in-16-domestic-shorthair-cats
#3
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/29457676/subthalamic-nucleus-pathology-contributes-to-repetitive-behavior-expression-and-is-reversed-by-environmental-enrichment
#4
Mark H Lewis, Zsuzsa Buchwald, Kathryn Boswell, Gabriella Edington, Michael A King, Amber M Muehlmann
Repetitive motor behaviors are common in neurodevelopmental, psychiatric, and neurological disorders. Despite their prevalence in certain clinical populations, our understanding of the neurobiological cause of repetitive behavior is lacking. Likewise, not knowing the pathophysiology has precluded efforts to find effective drug treatments. Our comparisons between mouse strains that differ in their expression of repetitive behavior revealed an important role of the subthalamic nucleus. In mice with high rates of repetitive behavior, we found significant differences in dendritic spine density, gene expression, and neuronal activation in the subthalamic nucleus...
February 19, 2018: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29457442/-development-and-application-of-artificial-vertebral-body
#5
REVIEW
Jian-Tao Liu, Feng Zhang, Zheng-Chao Gao, Bin-Bin Niu, Yu-Huan Li, Xi-Jing He
Artificial vertebral body has achieved good results in treating spinal tumors, tuberculosis, fracture and other diseases. Currently, artificial vertebral body with variety of kinds and pros and cons, is generally divided into two types: fusion type and movable type. The former according to whether the height could be adjusted and strength of self-stability is divided into three types: support-fixed type, adjust-fixed type and self-fixed type. Whether the height of self-fixed type could be adjusted is dependent on structure of collar thread rotation...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29457345/robot-assisted-vs-freehand-pedicle-screw-fixation-in-spine-surgery-a-systematic-review-and-a-meta-analysis-of-comparative-studies
#6
Lingjia Yu, Xi Chen, Adam Margalit, Huiming Peng, Guixing Qiu, Wenwei Qian
BACKGROUND: Medical robotics has progressively become more compelling in modern orthopaedic surgery. Several studies comparing robot-assisted (RA) and freehand (FH) conventional techniques for pedicle screw fixation have been published, but the results are unclear. Here, we assessed current evidence regarding the efficiency, safety and accuracy of RA compared with FH techniques. METHODS: A literature search of PubMed, Embase, the Cochrane Library and Web of Science was performed to compare the differences between RA and FH in spine surgery...
February 19, 2018: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29456936/bone-metastases-in-follicular-carcinoma-of-thyroid
#7
Pooja Pal, Bikramjit Singh, Shubhada Kane, Pankaj Chaturvedi
Though the association between follicular carcinoma and bone metastasis is well established, the site-wise distribution is not known. One hundred seventy-three patients of follicular carcinoma presenting between 2003 and 2011 were selected from 1093 patients of follicular lesions presenting at a single institution. Of these, 59 (34%) with bone metastasis were included in the study. Fifty of the 59 patients (84.7%) had metastasis at presentation, while 9 developed bone metastasis during follow-up. Sixty-one percent had solitary metastasis, 15 (25...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456918/cervical-disc-arthroplasty-a-comprehensive-review-of-single-level-multilevel-and-hybrid-procedures
#8
REVIEW
Joseph L Laratta, Jamal N Shillingford, Comron Saifi, K Daniel Riew
Study Design: Systematic review. Objectives: Degenerative disc disease and spondylosis resulting in radiculopathy and retrodiscal myelopathy are among the most frequently encountered cervical spinal disorders. Traditionally, anterior cervical discectomy and fusion (ACDF) has successfully achieved neural decompression and restored intradiscal height in these conditions. Unfortunately, nonunion and iatrogenic adjacent segment pathology associated with fusion procedures in the cervical spine has led to an interest in motion-preserving procedures...
February 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29456916/spine-degenerative-conditions-and-their-treatments-national-trends-in-the-united-states-of-america
#9
Zorica Buser, Brandon Ortega, Anthony D'Oro, William Pannell, Jeremiah R Cohen, Justin Wang, Ray Golish, Michael Reed, Jeffrey C Wang
Study Design: Retrospective database study. Objective: Low back and neck pain are among the top leading causes of disability worldwide. The aim of our study was to report the current trends on spine degenerative disorders and their treatments. Methods: Patients diagnosed with lumbar or cervical spine conditions within the orthopedic subset of Medicare and Humana databases (PearlDiver). From the initial cohorts we identified subgroups based on the treatment: fusion or nonoperative within 1 year from diagnosis...
February 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29456914/is-cervical-bracing-necessary-after-one-and-two-level-instrumented-anterior-cervical-discectomy-and-fusion-a-prospective-randomized-study
#10
Samuel C Overley, Robert K Merrill, Evan O Baird, Joshua J Meaike, Samuel K Cho, Andrew C Hecht, Sheeraz A Qureshi
Study Design: Prospective randomized control trial. Objective: To investigate the role of cervical collars in postoperative care following 1- and 2-level instrumented anterior cervical discectomy and fusion (ACDF). Methods: The Cervical Spine Research Society Resident Fellow Grant funded this project. Fifty consecutive patients undergoing 1- or 2-level ACDF surgery were randomized into groups receiving either no brace or a cervical brace for 6 weeks postoperatively...
February 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29456913/investigating-the-7-year-cost-effectiveness-of-single-level-cervical-disc-replacement-compared-to-anterior-cervical-discectomy-and-fusion
#11
Steven J McAnany, Robert K Merrill, Samuel C Overley, Jun S Kim, Robert L Brochin, Sheeraz A Qureshi
Study Design: Cost-effectiveness analysis. Objectives: To determine the 7-year cost-effectiveness of cervical disc replacement (CDR) and anterior cervical discectomy and fusion (ACDF). Methods: We analyzed 7-year Short Form-36 Health Survey data collected from the Prestige Cervical Disc investigational device exemption study (IDE). The SF-6D algorithm was used to convert this data into health state utilities. Costs were calculated from the payer perspective, and quality adjusted life years (QALYs) were used to represent effectiveness...
February 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29456912/dural-tears-in-adult-deformity-surgery-incidence-risk-factors-and-outcomes
#12
Sravisht Iyer, Eric O Klineberg, Lukas P Zebala, Michael P Kelly, Robert A Hart, Munish C Gupta, D Kojo Hamilton, Gregory M Mundis, Daniel Sciubba, Christopher P Ames, Justin S Smith, Virginie Lafage, Douglas Burton, Han Jo Kim
Study Design: Retrospective cohort study. Objectives: Describe the rate of dural tears (DTs) in adult spinal deformity (ASD) surgery. Describe the risk factors for DT and the impact of this complication on clinical outcomes. Methods: Patients with ASD undergoing surgery between 2008 and 2014 were separated into DT and non-DT cohorts; demographics, operative details, radiographic, and clinical outcomes were compared. Statistical analysis included t tests or χ2 tests as appropriate and a multivariate analysis...
February 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29456909/comparing-the-5-year-health-state-utility-value-of-cervical-disc-replacement-and-anterior-cervical-discectomy-and-fusion
#13
Steven J McAnany, Robert K Merrill, Robert L Brochin, Samuel C Overley, Jun S Kim, Sheeraz A Qureshi
Study Design: Health utility analysis. Objectives: To determine the health state utility (HSU) of 1- and 2-level anterior cervical discectomy and fusion (ACDF) and cervical disc replacement (CDR). Methods: Data from the Medtronic Prestige Cervical Disc investigational device exemption studies was used. Four groups were defined: 1-level ACDF, 1-level CDR, 2-level ACDF, and 2-level CDR. The 36-item Short Form Health Survey (SF-36) was collected at baseline, 12 months, 24 months, 36 months, and 60 months postoperatively and converted into utility scores for each time point...
February 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29456756/relationship-between-thoracic-kyphosis-and-neural-axis-abnormalities-in-patients-with-adolescent-idiopathic-scoliosis
#14
I Swarup, P Derman, E Sheha, J Nguyen, J Blanco, R Widmann
Purpose: Previous studies have suggested an association between increased thoracic kyphosis and neural axis abnormalities in patients with adolescent idiopathic scoliosis (AIS). However, the basis for this finding is unclear, and this association has been mainly noted in retrospective studies on a non-consecutive series of patients. The purpose of this study was to assess the relationship between thoracic kyphosis and neural axis abnormalities in patients with AIS. Methods: We studied a consecutive series of AIS patients treated with spinal fusion...
February 1, 2018: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/29456442/the-effect-of-direction-specific-thoracic-spine-manipulation-on-the-cervical-spine-a-randomized-controlled-trial
#15
Steve Karas, Megan J Olson Hunt, Bill Temes, Martin Thiel, Trenton Swoverland, Brett Windsor
Objectives: To determine the difference on neck outcomes with directional manipulation to the thoracic spine. There is evidence that thoracic spine manipulation is effective in treating patients with neck pain. However, there is no research that determines if the assessment of directional hypomobility and the selection of thrust direction offer improved outcomes. Methods: A total of 69 patients with cervical spine pain were randomly assigned to receive either a manipulation that was consistent with their thoracic spine motion loss (matched) or opposite their motion loss (unmatched)...
February 2018: Journal of Manual & Manipulative Therapy
https://www.readbyqxmd.com/read/29456361/upper-cervical-bronchogenic-cyst-a-rare-condition-at-a-rare-location
#16
Ranjeet Kumar Jha, Chandan B Mohanty, Chandrashekhar E Deopujari, Salman Tehran Shaikh
Intraspinal bronchogenic cyst (SBC) is a rare but important cause of spinal cord compression, commonly seen in the cervicothoracic spine. We report a case of a 43-year-old male, presenting with complaints of neck pain, radiating to right shoulder, with numbness of right hand and fingers. Magnetic resonance imaging of the cervical spine revealed an intradural extramedullary, ventral cystic lesion extending from C2 to C4 vertebral levels. Complete surgical excision was performed, and the patient had a complete relief of symptoms postoperatively...
January 2018: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/29456358/surgically-treated-primary-spinal-cord-neoplasms-in-southeastern-nigeria
#17
Mark Chukwunweike Chikani, Okwuoma Okwunodulu, Mathew Mesi, Wilfred C Mezue, Samuel C Ohaegbulam, Chika C Ndubuisi
Background: Primary spinal cord tumors are not as frequently encountered as their cranial counterparts. They could present in such an indolent manner that requires a reasonable index of suspicion for their diagnosis to be considered. Objective: The objective of this study is to analyze the incidence and pattern of primary spinal cord and appendage neoplasms in patients surgically treated in our institution over a decade of practice. Materials and Methods: A retrospective review of clinical, radiological, and histopathology profiles of patients surgically treated for primary spinal cord tumor from 2006 to 2016 was carried out...
January 2018: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/29456259/improvement-of-electromagnetic-field-distributions-using-high-dielectric-constant-hdc-materials-for-ctl-spine-mri-numerical-simulations-and-experiments
#18
Bu S Park, Brent McCright, Leonardo M Angelone, Amir Razjouyan, Sunder S Rajan
This study investigates the use of pads with high dielectric constant (HDC) materials to alter electromagnetic field distributions in patients during magnetic resonance imaging (MRI). The study was performed with numerical simulations and phantom measurements. An initial proof-of-concept and validation was performed using a phantom at 64 MHz, showing increases of up to 10% in electromagnetic field when using distilled water as the high dielectric material. Additionally, numerical simulations with computational models of human anatomy were performed at 128 MHz...
October 2017: IEEE Transactions on Electromagnetic Compatibility
https://www.readbyqxmd.com/read/29456172/effect-of-pediatric-growth-on-cervical-spine-kinematics-and-deformations-in-automotive-crashes
#19
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/29456171/a-magnetic-resonance-imaging-framework-for-quantifying-intervertebral-disc-deformation-in-vivo-reliability-and-application-to-diurnal-variations-in-lumbar-disc-shape
#20
John T Martin, Alexander B Oldweiler, Charles E Spritzer, Brian J Soher, Melissa M Erickson, Adam P Goode, Louis E DeFrate
Low back pain is a significant socioeconomic burden in the United States and lumbar intervertebral disc degeneration is frequently implicated as a cause. The discs play an important mechanical role in the spine, yet the relationship between disc function and back pain is poorly defined. The objective of this work was to develop a technique using magnetic resonance imaging (MRI) and three-dimensional modeling to measure in vivo disc deformations. Using this method, we found that disc geometry was measurable with precision less than the in-plane dimensions of a voxel (≈100 µm, 10% of the MRI pixel size)...
February 9, 2018: Journal of Biomechanics
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