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Tests and Measures Spine

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https://www.readbyqxmd.com/read/28809631/-comparison-between-the-range-of-movement-canine-real-cervical-spine-and-numerical-simulation-computer-model-validation
#1
R Srnec, Z Horák, R Sedláček, M Sedlinská, M Krbec, A Nečas
PURPOSE OF THE STUDY In developing new or modifying the existing surgical treatment methods of spine conditions an integral part of ex vivo experiments is the assessment of mechanical, kinematic and dynamic properties of created constructions. The aim of the study is to create an appropriately validated numerical model of canine cervical spine in order to obtain a tool for basic research to be applied in cervical spine surgeries. For this purpose, canine is a suitable model due to the occurrence of similar cervical spine conditions in some breeds of dogs and in humans...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28793888/does-structural-leg-length-discrepancy-affect-postural-control-preliminary-study
#2
Małgorzata Eliks, Wioleta Ostiak-Tomaszewska, Przemysław Lisiński, Paweł Koczewski
BACKGROUND: Leg-length inequality results in an altered position of the spine and pelvis. Previous studies on the influence of leg asymmetry on postural control have been inconclusive. The purpose of this paper was to investigate the effect of structural leg-length discrepancy (LLD) on the control of posture. METHODS: We studied 38 individuals (19 patients with structural LLD, 19 healthy subjects). The examination included measurement of the length of the lower limbs and weight distribution as well as a static posturography...
August 9, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28777063/comprehensive-biomechanical-analysis-of-three-reconstruction-techniques-following-total-sacrectomy-an-in-vitro-human-cadaveric-model
#3
Mohamed Macki, Rafael De la Garza-Ramos, Ashley A Murgatroyd, Kenneth P Mullinix, Xiaolei Sun, Bryan W Cunningham, Brandon A McCutcheon, Mohamad Bydon, Ziya L Gokaslan
OBJECTIVE Aggressive sacral tumors often require en bloc resection and lumbopelvic reconstruction. Instrumentation failure and pseudarthrosis remain a clinical concern to be addressed. The objective in this study was to compare the biomechanical stability of 3 distinct techniques for sacral reconstruction in vitro. METHODS In a human cadaveric model study, 8 intact human lumbopelvic specimens (L2-pelvis) were tested for flexion-extension range of motion (ROM), lateral bending, and axial rotation with a custom-designed 6-df spine simulator as well as axial compression stiffness with the MTS 858 Bionix Test System...
August 4, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28770402/kinematic-efficacy-of-supplemental-anterior-lumbar-interbody-fusion-at-lumbosacral-levels-in-thoracolumbosacral-deformity-correction-with-and-without-pedicle-subtraction-osteotomy-at-l3-an-in-vitro-cadaveric-study
#4
Benny T Dahl, Jonathan A Harris, Manasa Gudipally, Mark Moldavsky, Saif Khalil, Brandon S Bucklen
PURPOSE: Pedicle subtraction osteotomy (PSO) is performed to treat rigid, sagittal spinal deformities, but high rates of implant failure are reported. Anterior lumbar interbody fusion has been proposed to reduce this risk, but biomechanical investigation is lacking. The goal of this study was to quantify the (1) destabilizing effects of a lumbar osteotomy and (2) contribution of anterior lumbar interbody fusion (ALIF) at the lumbosacral junction as recommended in literature. METHODS: Fourteen fresh human thoracolumbosacral spines (T12-S1) were tested in flexion-extension (FE), lateral bending (LB), and axial rotation (AR)...
August 2, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28770254/3d-correction-of-ais-in-braces-designed-using-cad-cam-and-fem-a-randomized-controlled-trial
#5
Nikita Cobetto, Carl-Éric Aubin, Stefan Parent, Soraya Barchi, Isabelle Turgeon, Hubert Labelle
BACKGROUND: Recent studies showed that finite element model (FEM) combined to CAD/CAM improves the design of braces for the conservative treatment of adolescent idiopathic scoliosis (AIS), using 2D measurements from in-brace radiographs. We aim to assess the immediate effectiveness on curve correction in all three planes of braces designed using CAD/CAM and numerical simulation compared to braces designed with CAD/CAM only. METHODS: SRS standardized criteria for bracing were followed to recruit 48 AIS patients who were randomized into two groups...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28767625/patient-reported-outcomes-and-costs-associated-with-revision-surgery-for-degenerative-cervical-spine-diseases
#6
Elliott J Kim, Silky Chotai, Joseph B Wick, David P Stonko, Ahilan Sivaganesan, Clinton J Devin
STUDY DESIGN: Retrospective review of a prospective database. OBJECTIVE: Determine cost and outcomes of revision cervical spine surgery. SUMMARY OF BACKGROUND DATA: Revision rates for cervical spine surgery are steadily increasing. It is important to counsel patients on expected results following a revision procedure. However, outcomes and cost of these procedures are poorly defined in the literature. METHODS: Patients undergoing revision cervical spine surgery at a single institution were included between October 2010 and January 2016 in a prospective registry database...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28766159/what-is-the-difference-in-morphologic-features-of-the-thoracic-pedicle-between-patients-with-adolescent-idiopathic-scoliosis-and-healthy-subjects-a-ct-based-case-control-study
#7
Bo Gao, Wenjie Gao, Chong Chen, Qinghua Wang, Shaochun Lin, Caixia Xu, Dongsheng Huang, Peiqiang Su
BACKGROUND: Describing the morphologic features of the thoracic pedicle in patients with adolescent idiopathic scoliosis is necessary for placement of pedicle screws. Previous studies showed inadequate reliability owing to small sample size and heterogeneity of the patients surveyed. QUESTIONS/PURPOSES: To use CT scans (1) to describe the morphologic features of 2718 thoracic pedicles from 60 female patients with Lenke Type 1 adolescent idiopathic scoliosis and 60 age-, sex-, and height-matched controls; and (2) to classify the pedicles in three types based on pedicle width and analyze the distribution of each type...
August 1, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28759478/the-effects-of-orientation-of-lumbar-facet-joints-on-the-facet-joint-contact-forces-an-in-vitro-biomechanical-study
#8
Xiang Liu, Zhiping Huang, Ruozhou Zhou, Qingan Zhu, Wei Ji, Yaowu Long, Jixing Wang
STUDY DESIGN: A biomechanical human cadaveric study. OBJECTIVE: The aim of this study was to measure L2-L3 facet joint contact forces in a flexibility test using thin film electroresistive sensors, and facet joint orientation on CT scan images, to examine the effects of orientation of lumbar facet joint on the facet joint contact forces. SUMMARY OF BACKGROUND DATA: Biomechanically the bilateral facet joints play a critical role in maintaining stability of the lumbar spine by sharing load...
July 28, 2017: Spine
https://www.readbyqxmd.com/read/28756222/role-of-lncrna-tug1-in-intervertebral-disc-degeneration-and-nucleus-pulposus-cells-via-regulating-wnt-%C3%AE-catenin-signaling-pathway
#9
Jiang Chen, Yu-Song Jia, Gen-Zhe Liu, Qi Sun, Fan Zhang, Sheng Ma, Yong-Jun Wang
OBJECTIVE: To investigate the role of TUG1 in intervertebral disc degeneration (IDD) and human nucleus pulposus cells (NPCs) via regulating Wnt/β-catenin pathway. METHODS: The study collected nucleus pulposus (NP) tissue samples from 30 patients with lumbar disc herniation (LDH) (Case group) and 18 patients with lumbar spine trauma (Control group). NPCs induced by TNF-α in vitro were divided into Blank, Vector, TUG1, TUG1-siRNA, XAV-939, TUG1 + XAV-939 groups...
July 26, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28755383/solid-bone-tumors-of-the-spine-diagnostic-performance-of-apparent-diffusion-coefficient-measured-using-diffusion-weighted-mri-using-histology-as-a-reference-standard
#10
Grazia Pozzi, Domenico Albano, Carmelo Messina, Salvatore Alessio Angileri, Asma'a Al-Mnayyis, Fabio Galbusera, Alessandro Luzzati, Giuseppe Perrucchini, Gennaro Scotto, Antonina Parafioriti, Alberto Zerbi, Luca Maria Sconfienza
PURPOSE: To assess the diagnostic performance of mean apparent diffusion coefficient (mADC) in differentiating benign from malignant bone spine tumors, using histology as a reference standard. Conventional magnetic resonance imaging (MRI) sequences have good reliability in evaluating spinal bone tumors, although some features of benign and malignant cancers may overlap, making the differential diagnosis challenging. MATERIALS AND METHODS: In all, 116 patients (62 males, 54 females; mean age 59...
July 29, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28746128/does-the-position-of-the-aorta-change-with-the-altered-body-position-in-ankylosing-spondylitis-patients-with-thoracolumbar-kyphosis-a-magnetic-resonance-imaging-investigation
#11
Zhe Qu, Qian Bang-Ping, Yong Qiu, Ben-Long Shi, Ming-Liang Ji, Bin Wang, Yang Yu, Ze-Zhang Zhu
STUDY DESIGN: A prospective magnetic resonance imaging study. OBJECTIVE: To quantitatively explore the differences in the anatomic position of the aorta relative to the spine between supine and prone positions in ankylosing spondylitis (AS) patients with thoracolumbar kyphosis. SUMMARY OF BACKGROUND DATA: Aortic complications may occur during the lumbar spine osteotomy in correcting thoracolumbar kyphosis secondary to AS, and a clear understanding of the spatial relationship between the aorta and the vertebrae is essential to prevent these iatrogenic complications...
August 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28743448/chronic-cb1-cannabinoid-receptor-antagonism-persistently-increases-dendritic-spine-densities-in-brain-regions-important-to-zebra-finch-vocal-learning-and-production-in-an-antidepressant-sensitive-manner
#12
Tessa L Holland, Ken Soderstrom
During typical late-postnatal CNS development, net reductions in dendritic spine densities are associated with activity-dependent learning. Prior results showed agonist exposure in young animals increased spine densities in a subset of song regions while adult exposures did not, suggesting endocannabinoid signaling regulates dendritic spine dynamics important to vocal development. Here we addressed this question using the CB1 receptor-selective antagonist SR141716A (SR) to disrupt endocannabinoid signaling both during and after vocal learning...
July 22, 2017: Brain Research
https://www.readbyqxmd.com/read/28742736/comparative-analysis-of-perioperative-outcomes-using-nationally-derived-hospital-discharge-data-relative-to-a-prospective-multicenter-surgical-database-of-adult-spinal-deformity-surgery
#13
Gregory W Poorman, Peter G Passias, Aaron J Buckland, Cyrus M Jalai, Michael Kelly, Daniel M Sciubba, Brian J Neuman, D Kojo Hamilton, Amit Jain, Bassel Diebo, Virginie Lafage, Shay Bess, Eric O Klineberg
STUDY DESIGN: Retrospective analysis of three prospectively collected databases. OBJECTIVE: To compare perioperative outcomes in Adult Spinal Deformity (ASD) surgeries in a surgeon-run (SR-ASD) and two national databases: the Nationwide Inpatient Sample (NIS) and the National Surgical Quality Improvement Program (NSQIP). SUMMARY OF BACKGROUND DATA: Much has been learned on the treatment of ASD in the last decade with prospective multicenter collaborative research focusing on this specific condition...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28739479/emergency-department-visits-after-lumbar-spine-surgery-are-associated-with-lower-hcahps-scores
#14
Jay M Levin, Robert D Winkelman, Gabriel A Smith, Joseph E Tanenbaum, Roy Xiao, Thomas E Mroz, Michael P Steinmetz
BACKGROUND: Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) surveys are used to assess the quality of the patient experience following an inpatient stay. HCAHPS scores are used to determine reimbursement for hospital systems and incentivize spine surgeons nationwide. There are conflicting data detailing whether early readmission or other post-discharge complications are associated with patient responses on the HCAHPS survey. Currently, the association between post-discharge ED visits and HCAHPS scores following lumbar spine surgery is unknown...
July 21, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28738168/role-of-age-and-injury-mechanism-in-cervical-spine-injury-tolerance-under-head-contact-loading
#15
Narayan Yoganandan, Sajal Chirvi, Liming Voo, Frank A Pintar, Anjishnu Banerjee
OBJECTIVE: To determine the influence of age on cervical spine tolerance to injury from head contact loading using survival analysis. METHODS: This study analyzed data from previously conducted experiments using Post Mortem Human Subject specimens (PMHS). Group A tests used the upright intact head-cervical column experimental model. The inferior end of the specimen was fixed, head was balanced by a mechanical system, and natural lordosis was removed. Specimens were placed on a testing device via a load cell...
July 24, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28716636/a-simplified-clinical-prediction-rule-for-prognosticating-independent-walking-after-spinal-cord-injury-a-prospective-study-from-a-canadian-multicenter-spinal-cord-injury-registry
#16
Katharine E Hicks, Yichen Zhao, Nader Fallah, Carly Rivers, Vanessa Noonan, Tova Plashkes, Eugene K Wai, Darren M Roffey, Eve Tsai, Jerome Paquet, Najmedden Attabib, Travis Marion, Henry Ahn, Philippe Phan
BACKGROUND: Context: Traumatic spinal cord injury (SCI) is a debilitating condition with limited treatment options for neurological or functional recovery. The ability to predict the prognosis of walking post-injury with emerging prediction models could aid in rehabilitation strategies and reintegration into the community. PURPOSE: To re-validate an existing clinical prediction model for independent ambulation (van Middendorp et al. 2011) utilising acute and long-term post-injury follow-up data, and to investigate the accuracy of a simplified model using prospectively collected data from a Canadian multicenter SCI database, the Rick Hansen Spinal Cord Injury Registry (RHSCIR)...
July 14, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28715299/test-retest-reliability-of-measurements-of-abdominal-and-multifidus-muscles-using-ultrasound-imaging-in-adults-aged-50-79-years
#17
W A Cuellar, L Blizzard, M L Callisaya, J A Hides, G Jones, C Ding, T M Winzenberg
Test-retest reliability of the combined process of ultrasound imaging (USI) and image measurement of thickness of abdominal and upper lumbar multifidus (MF) muscles and MF cross sectional area (CSA) of older adults has not been established. Imaging muscles of older adults can be challenging due to age-related changes in the spine and skeletal muscle so establishing test-retest reliability in this population is important. This study aimed to evaluate test-retest reliability of USI of abdominal and MF muscle thickness and MF CSA for adults aged 50-79 years...
April 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28714773/impact-of-martial-arts-judo-karate-and-kung-fu-on-bone-mineral-density-gains-in-adolescents-of-both-genders-9-month-follow-up-martial-arts-and-bone-density
#18
Igor H Ito, Han C G Kemper, Ricardo R Agostinete, Kyle R Lynch, Diego G D Christofaro, Enio R Ronque, Rômulo A Fernandes
PURPOSE: To compare bone mineral density gains in adolescents of both genders stratified according to different martial art styles in a 9-month follow-up study. METHODS: The longitudinal study consisted of 29 adolescents of both genders and age between 11 and 17 years stratified into control group ([CG] not engaged in any sport) and 50 fighters (Kung-fu / karate-KF / KT, n = 29; Judo, n = 21). All 79 subjects underwent anthropometric measures (weight, height, leg length and height set), dual energy x-ray absorptiometry (Bone Mineral Density [BMD], in g/cm(2)) at two moments, baseline and nine months later...
July 17, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28714657/women-with-late-whiplash-syndrome-have-greatly-reduced-load-bearing-of-the-cervical-spine-in-vivo-biomechanical-cross-sectional-lateral-radiographic-study
#19
Eythor Kristjansson, Magnus K Gislason
BACKGROUND: No study has been conducted to ascertain whether the load-bearing capacity of the cervical spine is reduced in vivo in late whiplash syndrome (LWS). AIM: To compare the segmental cervical angular values across C0-C6, between two conditions: without versus with external axial load upon the head in three groups of women. DESIGN: A single-blind, age-Body Mass Index (BMI) matched, radiographic, cross-sectional study. SETTING: Radiographic Department at a University Hospital...
July 17, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28712980/association-of-selective-serotonin-reuptake-inhibitors-and-bone-mineral-density-in-elderly-women
#20
Smita Saraykar, Vineeth John, Bo Cao, Matthew Hnatow, Catherine G Ambrose, Nahid Rianon
Depression and osteoporosis are 2 common comorbidities in geriatric patients. There are concerns about the deleterious effects of selective serotonin reuptake inhibitor (SSRI) antidepressant use on bone mineral density (BMD). We examined the association between SSRI use and BMD in elderly women (≥65 yr) referred to a geriatric osteoporosis clinic for bone health evaluation. Cross-sectional analyses using the general linear model were performed on data collected retrospectively from August 2010 to April 2015...
July 13, 2017: Journal of Clinical Densitometry
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