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https://www.readbyqxmd.com/read/29135883/an-analysis-of-the-incidence-and-outcomes-of-major-vs-minor-neurological-decline-after-complex-adult-spinal-deformity-surgery-a-sub-analysis-of-scoli-risk-1-study
#1
So Kato, Michael G Fehlings, Stephen J Lewis, Lawrence G Lenke, Christopher I Shaffrey, Kenneth M C Cheung, Leah Carreon, Mark B Dekutoski, Frank J Schwab, Oheneba Boachie-Adjei, Khaled M Kebaish, Christopher P Ames, Yong Qiu, Yukihiro Matsuyama, Benny T Dahl, Hossein Mehdian, Ferran Pellisé, Sigurd H Berven
STUDY DESIGN: A sub-analysis from a prospective, multicenter, international cohort study in 15 sites (Scoli-RISK-1). OBJECTIVE: To report detailed information regarding the severity of neurological decline related to complex adult spine deformity (ASD) surgery and to examine outcomes based on severity. SUMMARY OF BACKGROUND DATA: The basis of post-operative neurological decline after ASD surgeries can occur due to nerve root(s) or spinal cord dysfunction...
November 10, 2017: Spine
https://www.readbyqxmd.com/read/29102872/shoulder-balance-in-lenke-type-2-adolescent-idiopathic-scoliosis-should-we-fuse-to-the-second-thoracic-vertebra
#2
Huiliang Yang, Gi Hye Im, Bowen Hu, Lei Wang, Chunguang Zhou, Limin Liu, Yueming Song
OBJECTIVES: There are many different systems recommending upper instrumented vertebra (UIV) for Lenke type 2 adolescent idiopathic scoliosis (AIS), several of which suggest that all Lenke type 2 AIS patients should be fused to the second thoracic vertebra (T2). However, all previously proposed UIV selecting systems do not accurately predict postoperative shoulder balance. We investigated whether fusing to T2 could prevent postoperative shoulder imbalance and identified circumstances under which to fuse up to T2...
October 31, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29093788/normal-age-adjusted-sagittal-spinal-alignment-is-achieved-with-surgical-correction-in-adolescent-idiopathic-scoliosis
#3
Subaraman Ramchandran, Norah Foster, Akhila Sure, Thomas J Errico, Aaron J Buckland
Study Design: Retrospective analysis. Purpose: Our hypothesis is that the surgical correction of adolescent idiopathic scoliosis (AIS) maintains normal sagittal alignment as compared to age-matched normative adolescent population. Overview of Literature: Sagittal spino-pelvic alignment in AIS has been reported, however, whether corrective spinal fusion surgery re-establishes normal alignment remains unverified. Methods: Sagittal profiles and spino-pelvic parameters of thirty-eight postsurgical correction AIS patients ≤21 years old without prior fusion from a single institution database were compared to previously published normative age-matched data...
October 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/29059123/implant-density-at-the-apex-is-more-important-than-overall-implant-density-for-3d-correction-in-thoracic-adolescent-idiopathic-scoliosis-using-rod-derotation-and-en-bloc-vertebral-derotation-technique
#4
Alexandre Delikaris, Xiaoyu Wang, Laure Boyer, A Noelle Larson, Charles G T Ledonio, Carl-Eric Aubin
STUDY DESIGN: Biomechanical analysis of 3D correction and bone-screw forces through numerical simulations of scoliosis instrumentation with different pedicle screw patterns. OBJECTIVE: To analyze the effect of different screw densities and distributions on 3D correction and bone-screw forces in adolescent idiopathic scoliosis (AIS) instrumentation. SUMMARY OF BACKGROUND DATA: Instrumentation constructs with various numbers of pedicle screws and patterns have been proposed for thoracic AIS instrumentation...
October 20, 2017: Spine
https://www.readbyqxmd.com/read/29057344/utilization-of-vertebroplasty-and-kyphoplasty-procedures-throughout-the-united-states-over-a-recent-decade-an-analysis-of-the-nationwide-inpatient-sample
#5
Joseph L Laratta, Jamal N Shillingford, Joseph M Lombardi, John D Mueller, Hemant Reddy, Comron Saifi, Charla R Fischer, Steven C Ludwig, Lawrence G Lenke, Ronald A Lehman
BACKGROUND: Given the increasing societal focus on health care utilization and value-based care, it is essential to understand the demographic and economic data surrounding percutaneous vertebral augmentation procedures performed in the United States. Double-blinded prospective randomized controlled trials have shown no benefit to the use of vertebroplasty over a sham procedure in the treatment of vertebral fractures. Contrastingly, kyphoplasty may be beneficial when appropriately indicated...
September 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29050718/timing-of-changes-in-three-dimensional-spinal-parameters-after-selective-thoracic-fusion-in-lenke-1-adolescent-idiopathic-scoliosis-two-year-follow-up
#6
Saba Pasha, John M Flynn, Paul D Sponseller, Giuseppe Orlando, Peter O Newton, Patrick J Cahill
STUDY DESIGN: Retrospective analysis of the prospectively collected data. OBJECTIVE: To investigate the relationship between the axial rotation of the unfused lumbar spine and the parameters of the instrumented thoracic spine at varying time points after selective thoracic fusion (STF) in Lenke 1B and 1C adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA: The impact of STF on the spontaneous lumbar curve correction in AIS has been studied mainly in the frontal planes...
November 2017: Spine Deformity
https://www.readbyqxmd.com/read/29049196/three-dimensional-reduction-and-finite-element-analysis-improves-the-treatment-of-pelvic-malunion-reconstructive-surgery-a-case-report
#7
Sascha Kurz, Philipp Pieroh, Maximilian Lenk, Christoph Josten, Jörg Böhme
RATIONALE: Pelvic malunion is a rare complication and is technically challenging to correct owing to the complex three-dimensional (3D) geometry of the pelvic girdle. Hence, precise preoperative planning is required to ensure appropriate correction. Reconstructive surgery is generally a 2- or 3-stage procedure, with transiliac osteotomy serving as an alternative to address limb length discrepancy. PATIENT CONCERNS: A 38-year-old female patient with a Mears type IV pelvic malunion with previous failed reconstructive surgery was admitted to our department due to progressive immobilization, increasing pain especially at the posterior pelvic arch and a leg length discrepancy...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29047523/simulation-of-small-and-wide-angle-scattering-properties-of-glass-bead-retroreflectors
#8
D Héricz, T Sarkadi, G Erdei, T Lazuech, S Lenk, P Koppa
Retroreflective materials are extensively used as traffic signs and security patterns. These goods are often realized by spherical glass-beads attached to some reflective substrate. New applications, especially 3D projection, require the precise evaluation and design of the characteristics of light backscattered from retroreflective screens. Simulation of such materials is not straightforward due to the different optical processes taking place: direct retroreflection involving small-angle diffraction effects, and multiple scattering resulting in wide-angle diffuse light...
May 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28965450/improved-restoration-of-thoracic-kyphosis-using-a-rod-construct-with-differentiated-rigidity-in-the-surgical-treatment-of-adolescent-idiopathic-scoliosis
#9
Søren Ohrt-Nissen, Casper Dragsted, Benny Dahl, John A I Ferguson, Martin Gehrchen
OBJECTIVE The objective of this study was to compare postoperative sagittal alignment among 3 rod constructs with different rigidity profiles. METHODS This was a dual-center retrospective cohort study involving 2 consecutive cohorts in which patients were surgically treated for adolescent idiopathic scoliosis. Lenke Type 5 curves were excluded. Patients were operated on with all-pedicle screw instrumentation using 3 different rod constructs. The first group was operated on using a hybrid construct (HC) consisting of a normal circular rod on the convex side and a beam-like rod (BR) on the concave side...
October 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28965445/temporary-occipital-fixation-in-young-children-with-severe-cervical-thoracic-spinal-deformity
#10
Brian J Kelley, Anas A Minkara, Peter D Angevine, Michael G Vitale, Lawrence G Lenke, Richard C E Anderson
OBJECTIVE The long-term effects of instrumentation and fusion of the occipital-cervical-thoracic spine on spinal growth in young children are poorly understood. To mitigate the effects of this surgery on the growing pediatric spine, the authors report a novel technique used in 4 children with severe cervical-thoracic instability. These patients underwent instrumentation from the occiput to the upper thoracic region for stabilization, but without bone graft at the craniovertebral junction (CVJ). Subsequent surgery was then performed to remove the occipital instrumentation, thereby allowing further growth and increased motion across the CVJ...
October 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28953709/differential-rod-contouring-is-essential-for-improving-vertebral-rotation-in-patients-with-adolescent-idiopathic-scoliosis-thoracic-curves-assessed-with-intraoperative-ct
#11
Shoji Seki, Peter O Newton, Yasuhito Yahara, Hiroto Makino, Masato Nakano, Norikazu Hirano, Yoshiharu Kawaguchi, Tomoatsu Kimura
STUDY DESIGN: Case series. OBJECTIVE: We investigated the contributions of rod contouring and of differential rod contouring (DRC) to the reduction of apical axial vertebral body rotation in patients with adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA: DRC is used for posterior spinal correction and fusion. The contribution of DRC to vertebral body derotation is unclear. METHODS: We analyzed the results of intraoperative computed tomography (CT) in 40 consecutive AIS patients with thoracic curves (Lenke type I or II, 35; type III or IV, 5)...
September 26, 2017: Spine
https://www.readbyqxmd.com/read/28944939/there-is-no-remarkable-differences-between-the-pedicle-screw-and-hybrid-construct-about-the-correction-of-lenke-type-i-curves
#12
Ulaş Serarslan, Emin Alici, Ömer Akçali, Can Koşay, Meriç Unal, Alper Gultekin
AIM: Lenke type-1, primary main thoracic curve pattern, is the most common spinal deformity pattern in adolescent idiopathic scoliosis (AIS). Posterior spinal fusion with all screw instrumentation or hybrid type instrumentation has been shown to achieve reliable deformity correction. The aim of this study is to compare deformity correction success of segmental pedicle screw and hybrid instrumentation for the treatment of Lenke type-1 AIS curves. MATERIAL AND METHODS: Surgically treated Lenke type-1 scoliosis patients were retrospectively evaluated and data of 26 patients that treated with hybrid instrumentation were included into first group...
July 12, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28943143/can-surgery-for-adolescent-idiopathic-scoliosis-of-less-than-50-degrees-of-main-thoracic-curve-achieve-good-results
#13
Tetsuhiko Mimura, Jun Takahashi, Shota Ikegami, Shugo Kuraishi, Masayuki Shimizu, Toshimasa Futatsugi, Masashi Uehara, Hiroki Oba, Michihiko Koseki, Hiroyuki Kato
BACKGROUND: It is generally recognized that the main thoracic curve Cobb angle threshold for surgical correction is approximately 50 degrees in patients with adolescent idiopathic scoliosis (AIS). Although AIS with a Cobb angle of <50 degrees is sometimes treated surgically to improve cosmesis, the precise outcomes are unclear. This study analyzed the postoperative results for AIS with a main thoracic curve of 50 degrees. METHODS: Thirty-nine consecutive patients with Lenke type 1-2 curves underwent posterior spinal fusion for AIS...
September 21, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28937532/prevalence-risk-factors-and-characteristics-of-the-adding-on-phenomenon-in-idiopathic-scoliosis-after-correction-surgery-a-systematic-review-and-meta-analysis
#14
Mingyuan Yang, Yuechao Zhao, Xin Yin, Ziqiang Chen, Changwei Yang, Li Li, Ming Li
STUDY DESIGN: A systematic review and meta-analysis OBJECTIVE.: To discuss the prevalence, risk factors and characteristics of the 'adding-on' phenomenon in idiopathic scoliosis (IS). SUMMARY OF BACKGROUND DATA: There are controversies on the prevalence and risk factors of the 'adding-on' phenomenon. In addition, there is no comprehensive study to describe the characteristics of 'adding-on' in IS patients. METHODS: We performed a systematic online search using PubMed, EMBASE, Web of Science, the Cochrane Library and China WeiPu Library to identify eligible studies...
September 20, 2017: Spine
https://www.readbyqxmd.com/read/28930855/distal-adding-on-phenomenon-in-adolescent-idiopathic-scoliosis-patients-with-thoracolumbar-vertebra-fusion-a-case-control-study
#15
Wei Xu, Chao Chen, Yifan Li, Changwei Yang, Ming Li, Zhikun Li, Xiaodong Zhu
The adding-on phenomenon is a common complication in adolescent idiopathic scoliosis (AIS) patients after correction surgery. However, the risk factors of previous studies and the optimal treatment strategies remain controversial. The aim of this study was to identify new risk factors for the adding-on phenomenon after posterior correction surgery in AIS patients and compare different treatment strategies to guide the selection of the lowest instrumented vertebra (LIV).All types of Lenke AIS patients who received correction surgery at our center from January 2009 to July 2014 were analyzed...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28922278/defining-the-critical-elements-for-the-most-common-procedures-in-spine-surgery-a-consensus-of-orthopaedic-and-neurosurgical-surgeons
#16
Joseph L Laratta, Samuel Cohen-Tanugi, Jamal N Shillingford, Joseph M Lombardi, Lawrence G Lenke, K Daniel Riew, Ronald A Lehman, Steven C Ludwig
STUDY DESIGN: Survey. OBJECTIVE: To define the critical elements of common spine surgeries. SUMMARY OF BACKGROUND DATA: Despite significant relevance to the field of spine surgery, the term "critical element" of surgery has not been clearly defined. Every surgical procedure involves numerous steps, each with its own potential for complications and harm to the patient. Despite its crucial role in surgical training, billing, and the ethicality of concurrent surgery, the term "critical element" of surgery has not been defined...
September 15, 2017: Spine
https://www.readbyqxmd.com/read/28889983/analysing-the-change-of-sagittal-balance-in-patients-with-lenke-5-idiopathic-scoliosis
#17
Okan Ozkunt, Gökhan Karademir, Kerim Sariyilmaz, Halil Can Gemalmaz, Fatih Dikici, Unsal Domanic
OBJECTIVE: The aim of this study was to evaluate preoperative and postoperative spinopelvic parameters and the influence of lowest instrumented vertebrae on sagittal parameters in Lenke 5 Adolescent Idiopathic Scoliosis (AIS) patients. METHODS: A total of 42 patients (37 females, 5 males; mean age: 16.71 ± 3.46 years) were included in the study. Preoperative and postoperative last follow up lumbar lordosis (LL), thoracic kyphosis (TK), pelvic tilt (PT), pelvic incidence (PI) and sacral slope (SS) angles measured...
September 7, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28889339/incidence-and-risk-factors-for-postoperative-shoulder-imbalance-in-scoliosis-a-systematic-review-and-meta-analysis
#18
ShengFei Zhang, Liang Zhang, XinMin Feng, HuiLin Yang
PURPOSE: This is the first systematic review and meta-analysis to detect the incidence and risk factors for postoperative shoulder imbalance (PSI) in scoliosis. METHODS: A systematic online search was conducted to identify eligible studies. ES, OR and WMD with 95% CI were used to assess the incidence and risk factors associated with PSI. RESULTS: Twenty-six studies were recruited. The pooled incidence of PSI was 25% (95% CI 20-31%). The incidence in Lenke 1 AIS, Lenke 2 AIS, Lenke 5 AIS and mixed AIS was 20% (9-31%), 26% (15-37%), 31% (17-45%) and 27% (19-35%), respectively...
September 9, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28881527/-factors-correlated-with-height-gain-after-posterior-spinal-correction-surgery-in-lenke-1-adolescent-idiopathic-scoliosis
#19
B L Shi, L Xu, S H Mao, L L Xu, X Sun, Z Liu, J Qiao, Z Z Zhu, Y Qiu
Objective: To investigate the correlated factors of height gain (ΔSH) after posterior spinal correction surgery in Lenke 1 adolescent idiopathic scoliosis (AIS), and to propose the predictive model of ΔSH. Methods: From 2013 to 2015, a total of 150 Lenke 1 AIS patients undergoing posterior spinal correction surgery were included in the study, with the age of (14.3±2.9) years. The Cobb angle of major curve, thoracic kyphosis (TK) and lumbar lordosis (LL) were measured on both pre-op and post-op standing whole spine x-rays...
September 5, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28838992/the-role-of-constitutive-activation-of-fms-related-tyrosine-kinase-3-and-nras-kras-mutational-status-in-infants-with-kmt2a-rearranged-acute-lymphoblastic-leukemia
#20
LETTER
Henning Fedders, Ameera Alsadeq, Juliane Schmäh, Fotini Vogiatzi, Martin Zimmermann, Anja Möricke, Lennart Lenk, Udo Zur Stadt, Martin A Horstmann, Rob Pieters, Martin Schrappe, Martin Stanulla, Gunnar Cario, Denis M Schewe
No abstract text is available yet for this article.
November 2017: Haematologica
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