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https://www.readbyqxmd.com/read/28222402/impact-of-anchor-type-on-porcine-lumbar-biomechanics-finite-element-modelling-and-in-vitro-validation
#1
Martin Brummund, Vladimir Brailovski, Yvan Petit, Yann Facchinello, Jean-Marc Mac-Thiong
BACKGROUND: Rigid posterior implants used for spinal stabilization can be anchored to the vertebrae using pedicle screws or screws combined with transverse process hooks. In the present study, a finite element model of a porcine lumbar spine instrumented with screws and hooks is presented and validated. METHODS: The porcine lumbar spine model was validated using in-vitro measurements on six porcine specimens. Validation metrics included intervertebral rotations (L1 to L6) and nucleus pressure in the topmost cranial instrumented disc...
February 14, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28220821/satisfaction-with-upper-limb-reconstructive-surgery-in-individuals-with-tetraplegia-the-development-and-reliability-of-a-swedish-self-reported-satisfaction-questionnaire
#2
L Bunketorp-Käll, J Wangdell, C Reinholdt, J Fridén
STUDY DESIGN: A questionnaire-based survey. OBJECTIVES: To assess satisfaction after upper limb reconstructive surgery in individuals with tetraplegia and to determine the reliability of a Swedish satisfaction questionnaire. SETTING: A center for advanced reconstruction of extremities, Gothenburg, Sweden. METHODS: Seventy-eight individuals with tetraplegia were invited to participate in the survey assessing satisfaction with the result of surgery across various domains...
February 21, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28216748/comparison-of-occipitocervical-and-atlantoaxial-fusion-in-treatment-of-unstable-jefferson-fractures
#3
Yong Hu, Zhen-Shan Yuan, Christopher K Kepler, Wei-Xin Dong, Xiao-Yang Sun, Jiao Zhang
BACKGROUND: Controversy exists regarding the management of unstable Jefferson fractures, with some surgeons performing reduction and immobilization of the patient in a halo vest and others performing open reduction and internal fixation. This study compares the clinical and radiological outcome parameters between posterior atlantoaxial fusion (AAF) and occipitocervical fusion (OCF) constructs in the treatment of the unstable atlas fracture. MATERIALS AND METHODS: 68 consecutive patients with unstable Jefferson fractures treated by AAF or OCF between October 2004 and March 2011 were included in this retrospective evaluation from institutional databases...
January 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28216705/comparison-of-fractionated-dose-versus-bolus-dose-injection-in-spinal-anaesthesia-for-patients-undergoing-elective-caesarean-section-a-randomised-double-blind-study
#4
Jigisha Prahaladray Badheka, Vrinda Pravinbhai Oza, Ashutosh Vyas, Deepika Baria, Poonam Nehra, Thomas Babu
BACKGROUND AND AIMS: Spinal anaesthesia (SA) with bolus dose has rapid onset but may precipitate hypotension. When we inject local anaesthetic in fractions with a time gap, it provides a dense block with haemodynamic stability and also prolongs the duration of analgesia. We aimed to compare fractionated dose with bolus dose in SA for haemodynamic stability and duration of analgesia in patients undergoing elective lower segment caesarean section (LSCS). METHODS: After clearance from the Institutional Ethics Committee, the study was carried out in sixty patients undergoing elective LSCS...
January 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28210635/combined-spinal-epidural-for-vaginal-delivery-in-a-parturient-with-takayasu-s-arteritis
#5
Sean Patrick Clifford, Paul Brian Mick, Brian Matthew Derhake
Takayasu's arteritis is a rare, progressive panendarteritis involving all layers of the arterial wall. This disease includes variable involvement of the aorta and its major branches. The most common complication with this condition is severe, uncontrolled hypertension, often leading to end organ dysfunction. We describe the management of a 27-year-old woman diagnosed with Takayasu's arteritis that presented in labor with intense pain and underwent a combined spinal-epidural for anesthetic management. Per literature review, a combined spinal-epidural technique for planned vaginal delivery has not been described for a laboring Takayasu patient...
October 2016: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28210045/a-kinematic-analysis-of-the-lower-limb-with-regard-to-restricted-spinal-motion-during-gait
#6
Hyeon-Nam Song, Young Mi Kim, Kyoung Kim
[Purpose] The purpose of this study was to investigate the effect of restricted spinal motion on kinematic changes in the lower extremities using a rigid thoracolumbosacral orthosis. [Subjects and Methods] Forty healthy males in their 20s were selected as the sample, which was randomly and evenly divided into two groups: (1) the WT group (with a thoracolumbosacral orthosis) and (2) the WOT group (without a thoracolumbosacral orthosis). The spinal orthosis used in this study was a thoracolumbosacral orthosis called a plastic body jacket...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28207656/biomechanical-evaluation-of-transpedicular-nucleotomy-with-intact-annulus-fibrosus
#7
Fabrizio Russo, Robert A Hartman, Kevin M Bell, Nam Vo, Gwendolyn A Sowa, James D Kang, Gianluca Vadalà, Vincenzo Denaro
STUDY DESIGN: Biomechanical testing of partially nucleotomized ovine cadaveric spines. OBJECTIVE: To explore how the nucleus pulposus (NP) affects the biomechanical behavior of the intervertebral disc (IVD) by performing a partial nucleotomy via the transpedicular approach. SUMMARY OF BACKGROUND DATA: Mechanical loading represents a crucial part of IVD homeostasis. However, traditional regenerative strategies require violation of the annulus fibrosus (AF) resulting in significant alteration of joint mechanics...
February 15, 2017: Spine
https://www.readbyqxmd.com/read/28207621/mri-based-decision-making-of-implant-removal-in-deep-wound-infection-after-instrumented-lumbar-fusion
#8
Masahiro Kanayama, Tomoyuki Hashimoto, Keiichi Shigenobu, Fumihiro Oha, Akira Iwata, Masaru Tanaka
STUDY DESIGN: A retrospective study. OBJECTIVE: The aim of the study was to review the treatment of deep wound infection after posterior instrumented lumbar fusion, and thereby to optimize the decision-making process of implant removal or retention on the basis of magnetic resonance imaging (MRI) assessment. SUMMARY OF BACKGROUND DATA: Biofilm formed on the surface of the spinal implant prevents infiltration of antibiotics and makes the infection treatment more complicated...
March 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28207536/cervical-plexus-anesthesia-versus-general-anesthesia-for-anterior-cervical-discectomy-and-fusion-surgery-a-randomized-clinical-trial
#9
Hui Wang, Lei Ma, Dalong Yang, Tao Wang, Qian Wang, Lijun Zhang, Wenyuan Ding
Both general anesthesia (GA) and cervical plexus anesthesia (CPA) can be used for anterior cervical discectomy and fusion (ACDF) surgery. The aim of this study was to evaluate the influence of anesthetic techniques on perioperative mortality and morbidity in patients undergoing cervical surgery.From January 2008 to December 2015, 356 patients who underwent 1-level ACDF for cervical spinal myelopathy were prospectively reviewed. They were assigned to receive GA (group A) and CPA (group B). The analgesic efficacy of the block was assessed by anesthesia preparation time, the maximum heart rate, and mean arterial blood pressure changes compared with the baseline, time of postoperative revival, and duration of recovery stay...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28204925/circumferential-fusion-for-degenerative-lumbar-spondylolisthesis-complicated-by-distal-junctional-grade-4-spondylolisthesis-in-the-sub-acute-post-operative-setting
#10
Alexander A Theologis, Deeptee Jain, Christopher P Ames, Murat Pekmezci
INTRODUCTION: Surgical management for lumbar stenosis is generally safe and provides significant improvements in pain, disability, and function. Successful lumbar decompression hinges on removing an appropriate amount of lamina and other compressive pathology in the lateral recess. Too little bony decompression can result in persistent pain and disability, while over resection of the pars and/or facets may jeopardize spinal stability. CASE REPORT: In this unique report, we present for the first time an acute iatrogenic grade 4 L5-S1 spondylolisthesis distal to a L3-5 laminectomy and circumferential instrumented fusion due to bilateral iatrogenic L5 pars fractures and its management and clinical outcomes after revision operation...
February 15, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28196468/posterior-pedicle-screw-fixation-to-treat-lower-cervical-fractures-associated-with-ankylosing-spondylitis-a-retrospective-study-of-35-cases
#11
Liang Yan, Zhenguo Luo, Baorong He, Jijun Liu, Dingjun Hao
BACKGROUND: The most common site of fractures in patients with ankylosing spondylitis (AS) is the cervical spine, especially the lower cervical spine and cervicothoracic junction. The optimal treatment for cervical spine fractures secondary to AS is controversial. This study aimed to explore the effects of posterior pedicle screw fixation alone on fractures of the lower cervical spine in patients with AS. METHODS: From January 2006 to January 2013, a total of 35 patients with AS and a lower cervical spine fracture were treated using only posterior cervical/thoracic pedicle screw fixation...
February 14, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28190488/effect-of-a-titanium-cage-as-a-stand-alone-device-on-biomechanical-stability-in-the-lumbosacral-spine-of-canine-cadavers
#12
M Teunissen, A J van der Veen, T H Smit, M A Tryfonidou, B P Meij
Degenerative lumbosacral stenosis is a common disease in dogs characterised by intervertebral disc herniation, loss of disc height and stenosis. Decompressive dorsal laminectomy and partial discectomy can cause spinal instability and worsen foraminal stenosis. Pedicle screw and rod fixation (PSRF) with an intervertebral body cage allows for distraction and restoration of disc height and restores foraminal apertures. The aim of this study was to evaluate the ex vivo biomechanical properties of a titanium intervertebral cage alone and in combination with PSRF in the lumbosacral spine of dogs...
February 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28187803/management-of-acute-traumatic-spinal-cord-injuries
#13
C D Shank, B C Walters, M N Hadley
Acute traumatic spinal cord injury (SCI) is a devastating disease process affecting tens of thousands of people across the USA each year. Despite the increase in primary prevention measures, such as educational programs, motor vehicle speed limits, automobile running lights, and safety technology that includes automobile passive restraint systems and airbags, SCIs continue to carry substantial permanent morbidity and mortality. Medical measures implemented following the initial injury are designed to limit secondary insult to the spinal cord and to stabilize the spinal column in an attempt to decrease devastating sequelae...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28187072/predictors-of-blood-transfusion-in-posterior-lumbar-spinal-fusion-a-canadian-spine-outcome-and-research-network-csorn-study
#14
Mina W Morcos, Fan Jiang, Greg McIntosh, Michael Johnson, Sean Christie, Eugene Wai, Jean Ouellet, Chris Bailey, Henry Ahn, Jerome Paquet, Neil Manson, Charles Fisher, Raja Rampersaud, Ken Thomas, Hamilton Hall, Michael Weber
STUDY DESIGN: Retrospective cohort study. OBJECTIVE: To identify patient or procedure related predictors of postoperative blood transfusions in posterior lumbar fusion (PSF). SUMMARY OF BACKGROUND DATA: The rate of PSF surgery has increased significantly. It remains the most common surgical procedure used to stabilize the spine; however, the impact of blood loss requiring blood transfusions remains a significant concern. METHODS: Analysis of data from the Canadian Spine Outcomes and Research Network...
February 9, 2017: Spine
https://www.readbyqxmd.com/read/28186932/descriptive-analysis-of-a-1-1-physiotherapy-outpatient-intervention-post-primary-lumbar-discectomy-one-arm-of-a-small-scale-parallel-randomised-controlled-trial-across-two-uk-sites
#15
A Rushton, A Calcutt, N Heneghan, A Heap, L White, M Calvert, P Goodwin
OBJECTIVE: There is a lack of high-quality evidence for physiotherapy post lumbar discectomy. Substantial heterogeneity in treatment effects may be explained by variation in quality, administration and components of interventions. An optimised physiotherapy intervention may reduce heterogeneity and improve patient benefit. The objective was to describe, analyse and evaluate an optimised 1:1 physiotherapy outpatient intervention for patients following primary lumbar discectomy, to provide preliminary insights...
November 9, 2016: BMJ Open
https://www.readbyqxmd.com/read/28185981/analysis-of-the-s2-alar-iliac-screw-as-compared-with-the-traditional-iliac-screw-does-it-increase-stability-with-sacroiliac-fixation-of-the-spine
#16
Daniel G Hoernschemeyer, Troy D Pashuck, Ferris M Pfeiffer
BACKGROUND CONTEXT: Arthrodesis of the lumbosacral junction continues to be a challenge in pediatric and adult spinal deformity surgery. PURPOSE: To evaluate the biomechanical rigidity of two types of lumbosacral fixation. Our hypothesis was that the use of S2 alar-iliac (S2AI) fixation will result in statistically similar biomechanical fixation as compared with use of an iliac screw with a 95% confidence interval. STUDY SETTING: Controlled biomechanical laboratory METHODS: Ten human cadaveric lumbosacral specimens were separated into two test groups: (1) S2AI (n=5) and (2) iliac screw (n=5)...
February 6, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28185615/clinical-study-of-neuroregen-scaffold-combined-with-human-mesenchymal-stem-cells-for-the-repair-of-chronic-complete-spinal-cord-injury
#17
Yannan Zhao, Fengwu Tang, Guang Han, Nuo Wang, Na Yin, Bing Chen, Xianfeng Jiang, Chen Yun, Wanjun Han, Changyu Zhao, Shixiang Cheng, Zhifeng Xiao, Sai Zhang, Jianwu Dai
Regeneration of damaged neurons and recovery of sensation and motor function after complete spinal cord injury (SCI) are challenging. We previously developed a collagen scaffold, NeuroRegen scaffold, to promote axonal growth along collagen fibers and inhibit glial scar formation after SCI. When functionalized with multiple biomolecules, this scaffold promoted neurological regeneration and functional recovery in animals with SCI. In this study, eight patients with chronic complete SCI were enrolled to examine the safety and efficacy of implanting NeuroRegen scaffold with human umbilical cord mesenchymal stem cells (MSCs)...
February 9, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28181797/a-thermosensitive-heparin-poloxamer-hydrogel-bridges-afgf-to-treat-spinal-cord-injury
#18
Qingqing Wang, Yan He, Yingzheng Zhao, Huixu Xie, Qian Lin, Zili He, Xiaoyan Wang, Jiawei Li, Hongyu Zhang, Chenggui Wang, Fanghua Gong, Xiaokun Li, Huazi Xu, Qingsong Ye, Jian Xiao
Acidic fibroblast growth factor (aFGF) exerts a protective effect on spinal cord injury (SCI) but is limited by the lack of physicochemical stability and the ability to cross the blood spinal cord barrier (BSCB). As promising biomaterials, hydrogels contain substantial amounts of water and a three-dimensional porous structure and are commonly used to load and deliver growth factors. Heparin can not only enhance growth factor loading onto hydrogels but also can stabilize the structure and control the release behavior...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28176970/percutaneous-vertebroplasty-and-interventional-tumor-removal-for-malignant-vertebral-compression-fractures-and-or-spinal-metastatic-tumor-with-epidural-involvement-a-prospective-pilot-study
#19
Yi-Feng Gu, Qing-Hua Tian, Yong-Dong Li, Chun-Gen Wu, Yan Su, Hong-Mei Song, Cheng-Jian He, Dong Chen
OBJECTIVE: The aim of this study was to compare the efficacy of percutaneous vertebroplasty (PVP) and interventional tumor removal (ITR), with PVP alone for malignant vertebral compression fractures and/or spinal metastatic tumor with epidural involvement. PATIENTS AND METHODS: A total of 124 patients were selected for PVP and ITR (n = 71, group A) and PVP alone (n = 53, group B). A 14 G needle and guide wire were inserted into the vertebral body, followed by sequential dilatation of the tract until the last cannula reached the anterior portion of the pedicle...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28174456/the-effects-of-forced-breathing-exercise-on-the-lumbar-stabilization-in-chronic-low-back-pain-patients
#20
Chul Ki, Myoung Heo, Hwang-Yong Kim, Eun-Jeong Kim
[Purpose] This study was conducted to investigate the effects of forced breathing exercise on the trunk functions of chronic low back pain patients. [Subjects and Methods] Twenty-four patients with chronic low back pain were randomly divided into groups of respiratory effort and trunk stabilization exercises. The exercises were performed for 45 minutes, 3 times per week for 6 weeks. Spinal stabilization was measured as the compensation of thesagittal angle joint in relation to the lumbar external load. [Results] After the intervention, the forced breathing and stabilization exercise groups showed a significant difference in lumbar spine stabilization between the first and second stress tests and the control group also showed a significant difference after the intervention...
December 2016: Journal of Physical Therapy Science
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