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https://www.readbyqxmd.com/read/28816947/kinematic-analysis-of-the-relationship-between-modic-changes-and-sagittal-balance-parameters-in-the-cervical-spine
#1
Zikun Ma, Peng Liu, Jingpei Liu, Jianhui Mou, Zhaolin Wang, Dong Sun, Jie Cheng, Dengwei Zhang, Jianlin Xiao
The aim of this study is to investigate the relationship between the Modic changes (MCs) and sagittal parameters of the cervical spine.We conducted a retrospective review of 100 outpatients with magnetic resonance imaging (MRI) scans of the cervical spine (50 male and 50 female). MRI parameters were measured, including neck tilt, T1 slope (T1 ), thoracic inlet angle (TIA), and cervical lordosis (CL: Cobb C2-7). Patients were divided into 4 groups according to the presence or absence of MC and T1s, respectively: MC(+) and MC(-) groups, as well as H-T1s (T1s ≥25°) and L-T1s subgroups (T1s <25°)...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28815157/a-levering-technique-using-small-parallel-rods-for-open-reduction-of-high-grade-thoracolumbar-dislocation
#2
Shailesh Hadgaonkar, Kunal Shah, Ketan Khurjekar, Vibhu Krishnan, Ashok Shyam, Parag Sancheti
STUDY DESIGN: Technical report. OBJECTIVE: Dorsolumbar vertebral dislocations, with or without associated fractures, occur secondary to very high velocity trauma. The reduction procedures and techniques, which may be adopted in these situations, have been multifariously discussed in the literature. Our objective was to assess the outcome of a novel reduction maneuver, using parallel rods which we have employed in reduction of high-grade thoracolumbar fractures to achieve precise sagittal balance as well as accurate vertebral alignment with minimal soft tissue damage...
June 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28814050/segmental-contributions-to-sagittal-plane-whole-body-angular-momentum-when-using-powered-compared-to-passive-ankle-foot-prostheses-on-ramps
#3
Nathaniel T Pickle, Anne K Silverman, Jason M Wilken, Nicholas P Fey
Understanding the effects of an assistive device on dynamic balance is crucial, particularly for robotic leg prostheses. Analyses of dynamic balance commonly evaluate the range of whole-body angular momentum (H). However, the contributions of individual body segments to overall H throughout gait may yield futher insights, specifically for people with transtibial amputation using powered prostheses. We evaluated segment contributions to H using Statistical Parametric Mapping to assess the effects of prosthesis type (powered vs passive) and ramp angle on segmental coordination...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28780746/normative-values-for-ct-based-texture-analysis-of-vertebral-bodies-in-dual-x-ray-absorptiometry-confirmed-normally-mineralized-subjects
#4
Manoj Mannil, Matthias Eberhard, Anton S Becker, Denise Schönenberg, Georg Osterhoff, Diana P Frey, Ender Konukoglu, Hatem Alkadhi, Roman Guggenberger
OBJECTIVES: To develop age-, gender-, and regional-specific normative values for texture analysis (TA) of spinal computed tomography (CT) in subjects with normal bone mineral density (BMD), as defined by dual X-ray absorptiometry (DXA), and to determine age-, gender-, and regional-specific differences. MATERIALS AND METHODS: In this retrospective, IRB-approved study, TA was performed on sagittal CT bone images of the thoracic and lumbar spine using dedicated software (MaZda) in 141 individuals with normal DXA BMD findings...
August 6, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28776134/a-randomized-double-blinded-clinical-trial-to-evaluate-the-safety-and-efficacy-of-a-novel-superelastic-nickel-titanium-spinal-rod-in-adolescent-idiopathic-scoliosis-5-year-follow-up
#5
Jason Pui Yin Cheung, Dino Samartzis, Kelvin Yeung, Michael To, Keith Dip Kei Luk, Kenneth Man-Chee Cheung
PURPOSE: To evaluate the safety and efficacy of a superelastic shape-memory alloy (SNT) rod used in the treatment of adolescent idiopathic scoliosis (AIS). METHODS: AIS Patients with Lenke 1 curves undergoing fusion surgery were randomized (1:1) at the time of surgery to receive either the SNT or a conventional titanium alloy (CTA) rod. Radiographs were obtained preoperatively and postoperatively up to 5 years of follow-up. Parameters assessed included coronal and sagittal Cobb angles, and overall truncal and shoulder balance...
August 4, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28774491/does-restoration-of-focal-lumbar-lordosis-for-single-level-degenerative-spondylolisthesis-result-in-better-patient-reported-clinical-outcomes-a-systematic-literature-review
#6
REVIEW
Chanseok Rhee, Sarah Visintini, Cynthia E Dunning, William M Oxner, R Andrew Glennie
It is controversial whether the surgical restoration of sagittal balance and spinopelvic angulation in a single level lumbar degenerative spondylolisthesis results in clinical improvements. The purpose of this study to systematically review the available literature to determine whether the surgical correction of malalignment in lumbar degenerative spondylolisthesis correlates with improvements in patient-reported clinical outcomes. Literature searches were performed via Ovid Medline, Embase, CENTRAL and Web of Science using search terms "lumbar," "degenerative/spondylolisthesis" and "surgery/surgical/surgeries/fusion"...
July 31, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28768786/posterior-spinal-fusion-for-adolescent-idiopathic-scoliosis-using-a-convex-pedicle-screw-technique-a-novel-concept-of-deformity-correction
#7
A I Tsirikos, G Mataliotakis, N Bounakis
AIMS: We present the results of correcting a double or triple curve adolescent idiopathic scoliosis using a convex segmental pedicle screw technique. PATIENTS AND METHODS: We reviewed 191 patients with a mean age at surgery of 15 years (11 to 23.3). Pedicle screws were placed at the convexity of each curve. Concave screws were inserted at one or two cephalad levels and two caudal levels. The mean operating time was 183 minutes (132 to 276) and the mean blood loss 0...
August 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28767630/predictive-findings-of-the-presence-of-stooping-in-patients-with-lumbar-degenerative-kyphosis-by-upright-whole-spine-lateral-radiography
#8
Seung Min Son, Jong Ki Shin, Tae Sik Goh, Kuen Tak Suh, Jung Sub Lee
STUDY DESIGN: Retrospective study. OBJECTIVE: To identify the relationships between radiological findings and the presence of stooping in lumbar degenerative kyphosis (LDK). SUMMARY OF BACKGROUND DATA: Many studies have addressed fixed sagittal imbalances and surgical treatments. However, information regarding the relationship between radiological findings and stooping in LDK is sparse. METHODS: The study included 73 patients with LDK and 44 with normal lumbar lordosis...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28767627/muscle-preserving-selective-laminectomy-maintained-the-compensatory-mechanism-of-cervical-lordosis-after-surgery
#9
Satoshi Nori, Tateru Shiraishi, Ryoma Aoyama, Ken Ninomiya, Junichi Yamane, Kazuya Kitamura, Seiji Ueda
STUDY DESIGN: A retrospective single-center study. OBJECTIVE: To evaluate the compensatory mechanism of cervical lordosis (CL), the changes in cervical sagittal alignment and range of motion (ROM) after muscle-preserving selective laminectomy (SL). SUMMARY OF BACKGROUND DATA: CL increases as a compensatory mechanism for the adjustment of cervical sagittal balance or horizontal gaze. However, laminoplasty invades this mechanism and causes kyphosis in higher T1 (C7) slope patients...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28767624/can-c7-slope-substitute-the-t1-slope-an-analysis-using-cervical-radiographs-and-kinematic-mris
#10
Koji Tamai, Zorica Buser, Permsak Paholpak, Kittipong Seesumpun, Hiroaki Nakamura, Jeffrey C Wang
STUDY DESIGN: Retrospective analysis of consecutive 45 radiographs and 120 kinematic magnetic resonance images (kMRI) OBJECTIVE.: The aim was to assess the visibility of C7 and T1 endplates on radiographs, and to verify the correlation between C7 or T1 slope and cervical balance parameters using kMRI. SUMMARY OF BACKGROUND DATA: Because the T1 slope is not always visible due to the anatomical interference, several studies have used C7 slope instead of T1. However, it is still unclear whether the C7 endplate is more visible on radiographs than T1, and if C7 slope has similarity with T1 slope...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28765807/the-influence-of-lordotic-cages-on-creating-sagittal-balance-in-the-cmis-treatment-of-adult-spinal-deformity
#11
Neel Anand, Ryan B Cohen, Jason Cohen, Babak Kahndehroo, Sheila Kahwaty, Eli Baron
BACKGROUND: CMIS techniques are heavily dependent on placement of lateral interbody cages. Cages with an increased lordotic angle are being advocated to improve segmental lordosis and SVA. We assessed the segmental lordosis achieved with the individual cages. We further studied three variables and the effect each had on segmental lordosis: the lordosis angle of the cage, the position of the cage in the intervertebral space, and the level that it has been placed. METHODS: This is a retrospective study of 66 consecutive patients who underwent lateral interbody fusion using lordotic cages as part of CMIS correction of scoliosis from June 2012 to January 2016...
2017: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/28762503/mechanomyography-based-wearable-monitor-of-quasi-isometric-muscle-fatigue-for-motor-neural-prostheses
#12
Eddy Krueger, Lana Popović-Maneski, Percy Nohama
A motor neural prosthesis based on surface functional electrical stimulation (sFES) can restore functional movement (e.g., standing, walking) in patients with a spinal cord injury (SCI). sFES generates muscle contractions in antigravity muscles and allows balance-assisted standing. This induced standing has several benefits, such as improved cardiovascular function, decreased incidence of urinary infections, reduced joint contractures, and muscle atrophy. The duration of sFES assisted standing is limited due to the quick onset of muscle fatigue...
August 1, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28746140/are-there-3d-changes-in-spine-and-rod-shape-in-the-2-years-after-adolescent-idiopathic-scoliosis-instrumentation
#13
Franck Le Navéaux, Hubert Labelle, Stefan Parent, Peter O Newton, Carl-Eric Aubin
STUDY DESIGN: Retrospective analysis of spine and rods 3D shape in the 2 years after adolescent idiopathic scoliosis (AIS) posterior surgical instrumentation. OBJECTIVE: To evaluate spine and rod shape 3D changes in the 2 years after AIS instrumentation with different rod materials. SUMMARY OF BACKGROUND DATA: Postoperative loss of correction has been reported with modern segmental instrumentation. The postoperative 3D rod shape changes of different rod materials and their implication in postoperative loss of correction have never been studied...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28746123/a-change-in-lumbar-sagittal-alignment-after-single-level-anterior-lumbar-interbody-fusion-for-lumbar-degenerative-spondylolisthesis-with-normal-sagittal-balance
#14
Chi Heon Kim, Chun Kee Chung, Sung Bae Park, Seung Heon Yang, Jung-Hee Kim
STUDY DESIGN: Retrospective analysis. OBJECTIVE: The object is to assess the correlation between whole lumbar lordosis (LL) and the segmental angle (SA) after single-level anterior lumbar interbody fusion for degenerative lumbar spondylolisthesis. SUMMARY OF BACKGROUND DATA: The restoration of the SA at lower lumbar spine is meaningful, considering it contributes approximately 60% of LL, and revision surgery due to flat back or adjacent segment pathology was necessary decades after the initial surgery...
August 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28744036/interrelationship-between-postural-balance-and-body-posture-in-children-and-adolescents
#15
Oliver Ludwig
[Purpose] This study examined possible interrelationships between postural sway and posture parameters in children and adolescents with a particular focus on posture weakness. [Subjects and Methods] 308 healthy children and adolescents (124 girls, 184 boys, aged 12.3 ± 2.5 years) participated in the study. Posture parameters (posture index, head protrusion, trunk inclination) were determined based on posture photos in the sagittal plane. Postural sway was measured during 20 seconds on a force plate. The Pearson's product-moment correlation coefficients between the anthropometric and posture parameters and the sway path length (SPL) were calculated, as well as the coefficient of determination R(2)...
July 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28741218/asymmetric-pedicle-subtractionosteotomy-apso-guided-by-a-3d-printed-model-to-correct-a-combined-fixed-sagittal-and-coronal-imbalance
#16
Pierre-Pascal Girod, S Hartmann, P Kavakebi, J Obernauer, M Verius, C Thomé
Surgical correction of fixed thoracolumbar deformity is usually achieved by estimating the preoperatively planned correction angles during surgery and is therefore prone to inaccuracy. This is particularly problematic in biplanar deformities. To overcome these difficulties, 3D model for planning, preparation, and simulation of an asymmetric pedicle subtraction osteotomy (aPSO) was printed and used to realign coronal and sagittal balance in case of rigid degenerative kyphoscoliosis. A 59-year-old woman presented with severe back pain and spinal claudication and was diagnosed with a rigid kyphoscoliosis with multilevel spinal stenosis...
July 24, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28718522/t2-prepared-balanced-steady-state-free-precession-bssfp-for-quantifying-whole-blood-oxygen-saturation-at-1-5t
#17
Ana E Rodríguez-Soto, Osheiza Abdulmalik, Michael C Langham, Nadav Schwartz, Hyunyeol Lee, Felix W Wehrli
PURPOSE: To establish a calibration equation to convert human blood T2 to the full range of oxygen saturation levels (HbO2 ) and physiologic hematocrit (Hct) values using a T2 -prepared balanced steady-state free precession sequence (T2 -SSFP) at 1.5T. METHODS: Blood drawn from 10 healthy donors (29.1 ± 3.9 years old) was prepared into samples of varying HbO2 and Hct (n = 79), and imaged using T2 -SSFP sequence at 37°C and interrefocusing interval τ180  = 12 ms...
July 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28709947/combination-of-whole-spine-lateral-radiograph-and-lateral-scanogram-in-the-assessment-of-global-sagittal-balance
#18
Chang-Hoon Jeon, Kyu-Sung Kwack, Sunghoon Park, Han-Dong Lee, Nam-Su Chung
BACKGROUND CONTEXT: Global balance of human standing is analyzed as the geometric sum of the individual alignments extending from the spinal column to the pelvis, and to the lower limbs. The innovative EOS system has opened new perspectives for the global analysis of whole-body alignment, but its use is very limited because of its high cost. An alternative may be to combine the whole-spine lateral radiograph and the lateral scanogram in the global sagittal analysis of whole-body alignment...
July 12, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28700454/posterior-only-hemivertebra-resection-for-congenital-cervicothoracic-scoliosis-correcting-neck-tilt-and-balancing-the-shoulders
#19
Zhonghui Chen, Yong Qiu, Zezhang Zhu, Song Li, Xi Chen, Liang Xu, Xu Sun
STUDY DESIGN: A retrospective study. OBJECTIVE: To evaluate radiographic and cosmetic outcomes following posterior-only cervicothoracic hemivertebra resection and instrumentation. SUMMARY OF BACKGROUND DATA: Cervicothoracic hemivertebra is a rare congenital deformity. It locates between the mobile cervical spine and the fixed thoracic spine, leading to rapid curve progression, shoulder imbalance, fixed torticollis and facial asymmetry. METHODS: This study reviewed a consecutive series of 18 patients with cervicothoracic hemivertebra...
July 11, 2017: Spine
https://www.readbyqxmd.com/read/28698940/radiological-outcome-of-postoperative-sagittal-balance-on-standing-radiographs-in-comparison-to-intraoperative-radiographs-in-prone-position-when-performing-lumbar-spinal-fusion
#20
Felix Greimel, Stefanie Wolkerstorfer, Jan-Frederik Spörrer, Florian Zeman, Patrick Hoffstetter, Joachim Grifka, Achim Benditz
PURPOSE: Aim of this study is to show the outcome of postoperatively measured lumbar lordosis in upright position in comparison to the intraoperatively estimated lumbar lordosis in prone position, as the lumbar lordosis is one of the most important factors for the clinical outcome after spinal fusion. MATERIALS AND METHODS: Eighty-two patients, receiving lumbar fusion were included in this retrospective study. Intraoperative radiographs were scanned. Then radiographs of the whole spine pre- and postoperatively, as well as 1 year after surgery were measured by a spine surgeon and a radiologist...
July 11, 2017: Archives of Orthopaedic and Trauma Surgery
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