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https://www.readbyqxmd.com/read/29879775/factors-associated-with-the-symptoms-of-young-adults-with-l5-spondylolysis
#1
Min-Woo Kim, Kyu Yeol Lee, Seunghyun Lee
STUDY DESIGN: A retrospective cohort study. PURPOSE: To investigate the factors affecting symptoms in young adults with L5 spondylolysis. OVERVIEW OF LITERATURE: L5 spondylolysis is a common disease. However, not all patients diagnosed with L5 spondylolysis exhibit symptoms. This study examined the factors associated with the symptoms of young adults with L5 spondylolysis. METHODS: The medical records of 70 young adults (mean age, 31...
June 2018: Asian Spine Journal
https://www.readbyqxmd.com/read/29866146/correlations-between-the-sagittal-plane-parameters-of-the-spine-and-pelvis-and-lumbar-disc-degeneration
#2
Xu Wei, Li Gengwu, Chen Chao, Li Yifan, Sang Shang, Hu Ruixi, Ji Yunhan, Zhu Xiaodong, Li Zhikun
BACKGROUND: Studies have shown that lumbar disc herniation, degenerative lumbar instability, and other degenerative lumbar spinal diseases are often secondary to disc degeneration. By studying the intervertebral disc, researchers have clarified the pathological changes involved in intervertebral disc degeneration but have ignored the roles of biomechanical factors in the development of disc degeneration. This study aims to investigate the relationships among the location, scope, and extent of lumbar disc degeneration and sagittal spinal-pelvic parameters...
June 4, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29859144/microstructure-of-parapapillary-atrophy-is-associated-with-parapapillary-microvasculature-in-myopic-eyes
#3
Mi Sun Sung, Hwan Heo, Sang Woo Park
PURPOSE: To evaluate the clinical characteristics of β-PPA in myopic eyes and determine whether the microstructure of β-PPA is associated with parapapillary microvasculature by using optical coherence tomography (OCT) angiography. DESIGN: Cross-sectional study METHODS: This study included 80 subjects with myopia with β-PPA. Spherical equivalent (SE) refractive error, axial length, horizontal tilt angle, and the width of β-PPA were evaluated. The microstructure of β-PPA and subfoveal choroidal thickness were evaluated using enhanced-depth imaging OCT and eyes were classified into 3 groups based on the presence of Bruch's membrane (BM), a PPA+BM only group, a PPA+BM and PPA-BM group, and a PPA-BM only group...
May 30, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29805394/comparison-of-lumbosacral-alignment-in-geriatric-and-non-geriatric-patients-suffering-low-back-pain
#4
Burhan Fatih Kocyigit, Ejder Berk
Objective: Lumbosacral alignment is a crucial factor for an appropriate spinal function. Changes in spinal alignment lead to diminished body biomechanics. Additionally, lumbosacral alignment may affect quality of life, sagittal balance and fall risk in elderly. In this study, we aimed to compare lumbosacral alignment in geriatric and non-geriatric patients suffering from low back pain. Methods: A total of 202 (120 male and 82 female) patients who visited to physical medicine and rehabilitation clinic with low back pain between January 2017 and August 2017 were enrolled in this study...
March 2018: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29783102/strain-analysis-from-nano-beam-electron-diffraction-influence-of-specimen-tilt-and-beam-convergence
#5
Tim Grieb, Florian F Krause, Marco Schowalter, Dennis Zillmann, Roman Sellin, Knut Müller-Caspary, Christoph Mahr, Thorsten Mehrtens, Dieter Bimberg, Andreas Rosenauer
Strain analyses from experimental series of nano-beam electron diffraction (NBED) patterns in scanning transmission electron microscopy are performed for different specimen tilts. Simulations of NBED series are presented for which strain analysis gives results that are in accordance with experiment. This consequently allows to study the relation between measured strain and actual underlying strain. A two-tilt method which can be seen as lowest-order electron beam precession is suggested and experimentally implemented...
April 12, 2018: Ultramicroscopy
https://www.readbyqxmd.com/read/29780957/optic-nerve-compression-as-a-late-complication-of-a-hydrogel-explant-with-silicone-encircling-band
#6
Niels Crama, Leo Kluijtmans, B Jeroen Klevering
Purpose: To present a complication of compressive optic neuropathy caused by a swollen hydrogel explant and posteriorly displaced silicone encircling band. Observations: A 72-year-old female patient presented with progressive visual loss and a tilted optic disc. Her medical history included a retinal detachment in 1993 that was treated with a hydrogel explant under a solid silicone encircling band. Visual acuity had decreased from 6/10 to 6/20 and perimetry showed a scotoma in the temporal superior quadrant...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29772956/lumbar-muscle-structure-predicts-operational-postures-in-active-duty-marines
#7
David B Berry, Bahar Shahidi, Ana E Rodríguez-Soto, Jan M Hughes-Austin, Karen R Kelly, Samuel R Ward
Study Design Cross-sectional. Background The relationship between lumbar spine posture and muscle structure is not well understood. Objectives Investigate the predictive capacity of muscle structure on lumbar spine posture in active duty Marines. Methods Fouty-three Marines were scanned using an upright magnetic resonance imaging (MRI) scanner while standing unloaded and standing, sitting, and prone on elbows with body armor. Cobb, horizontal, and sacral angles were measured. Marines were then scanned unloaded in supine using a supine MRI scanner...
May 17, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29771733/haemodilution-and-head-down-tilting-induce-functional-injury-in-the-rat-optic-nerve-a-model-for-peri-operative-ischemic-optic-neuropathy
#8
Steven Roth, John Dreixler, Nancy J Newman
BACKGROUND: Mechanisms of peri-operative ischaemic optic neuropathy remain poorly understood. Both specific pre-operative and intra-operative factors have been examined by retrospective studies, but no animal model currently exists. OBJECTIVES: To develop a rodent model of peri-operative ischaemic optic neuropathy. In rats, we performed head-down tilt and/or haemodilution, theorising that the combination damages the optic nerve. DESIGN: Animal study...
May 15, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29763470/the-influence-of-spinal-pelvic-parameters-on-the-prevalence-of-endplate-modic-changes-in-degenerative-thoracolumbar-lumbar-kyphosis-patients
#9
Weiwei Xia, Chenjun Liu, Shuo Duan, Shuai Xu, Kaifeng Wang, Zhenqi Zhu, Haiying Liu
BACKGROUND: The typical degeneration of the vertebral endplate shown in MRI imaging is Modic change. The aim of this study was to observe the distribution of the Modic changes of vertebral endplate in degenerative thoracolumbar/lumbar kyphosis (DTK/LK) patients and analyse the correlation between spinal-pelvic parameters and Modic changes. METHODS: The imaging data of 58 patients diagnosed with DTK/LK (coronal Cobb angle<10°with sagittal imbalance) in our hospital from March 2016 to May 2017 were reviewed retrospectively...
2018: PloS One
https://www.readbyqxmd.com/read/29757809/applicability-of-isnt-rule-using-bmo-mrw-to-differentiate-between-healthy-and-glaucomatous-eyes
#10
Do Young Park, Eun Jung Lee, Jong Chul Han, Changwon Kee
PURPOSE: We evaluated the applicability of the ISNT rule using Bruch's membrane opening minimum rim width (BMO-MRW) in healthy eyes and eyes with normal tension glaucoma (NTG). METHODS: 124 healthy eyes and 136 NTG eyes were analyzed. Using two-dimensional disc photographs, neuroretinal rim (NRR) thickness was measured at the superior, inferior, nasal, and temporal sides of the optic disc. Using spectral domain-optical coherence tomography (SD-OCT), BMO-MRW was measured at the same regions...
May 11, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29750755/predicting-factors-at-skeletal-maturity-for-curve-progression-and-low-back-pain-in-adult-patients-treated-non-operatively-for-adolescent-idiopathic-scoliosis-with-thoracolumbar-lumbar-curves-a-mean-25-year-follow-up
#11
Masayuki Ohashi, Kei Watanabe, Toru Hirano, Kazuhiro Hasegawa, Keiichi Katsumi, Hirokazu Shoji, Mizouchi Tatsuki, Naoto Endo
STUDY DESIGN: A retrospective, long-term follow-up study. OBJECTIVE: We aimed to clarify the predicting factors at skeletal maturity for future curve progression and low back pain (LBP) in adolescent idiopathic scoliosis (AIS) with thoracolumbar/lumbar (TL/L) curve. SUMMARY OF BACKGROUND DATA: TL/L curves are likely to progress after skeletal maturity and cause LBP. METHODS: Of 147 patients treated non-operatively for AIS with TL/L curve, 56 (55 females; average age at the time of survey, 39...
May 10, 2018: Spine
https://www.readbyqxmd.com/read/29732092/impact-of-the-lipid-bilayer-on-energy-transfer-kinetics-in-the-photosynthetic-protein-lh2
#12
John I Ogren, Ashley L Tong, Samuel C Gordon, Aurélia Chenu, Yue Lu, Robert E Blankenship, Jianshu Cao, Gabriela S Schlau-Cohen
Photosynthetic purple bacteria convert solar energy to chemical energy with near unity quantum efficiency. The light-harvesting process begins with absorption of solar energy by an antenna protein called Light-Harvesting Complex 2 (LH2). Energy is subsequently transferred within LH2 and then through a network of additional light-harvesting proteins to a central location, termed the reaction center, where charge separation occurs. The energy transfer dynamics of LH2 are highly sensitive to intermolecular distances and relative organizations...
March 28, 2018: Chemical Science
https://www.readbyqxmd.com/read/29730457/anterior-posterior-length-discrepancy-of-the-spinal-column-in-adolescent-idiopathic-scoliosis-a-3d-ct-study
#13
Rob C Brink, Tom P C Schlösser, Marijn van Stralen, Koen L Vincken, Moyo C Kruyt, Steve C N Hui, Max A Viergever, Winnie C W Chu, Jack C Y Cheng, René M Castelein
BACKGROUND CONTEXT: One of the characteristics of reported observations in adolescent idiopathic scoliosis (AIS) is that the thoracic spine is longer anteriorly than posteriorly, more pronounced around the apex than the transitional zones. This reversal of the normal kyphotic anatomy of the thoracic spine is related to questions of etiopathogenesis of AIS. The changes in the anatomy of the anterior column have been described rather in detail, however, the role of the posterior spinal column and the laminae has so far not been elucidated...
May 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29680510/srs-schwab-grade-4-osteotomy-for-congenital-thoracolumbar-kyphosis-a-minimum-of-2-years-follow-up-study
#14
Benlong Shi, Qinghua Zhao, Liang Xu, Zhen Liu, Xu Sun, Zezhang Zhu, Yong Qiu
BACKGROUND CONTEXT: Several osteotomy techniques including pedicle subtraction osteotomy and vertebral column resection have been employed in the correction of congenital kyphosis (CK) and satisfying outcomes have been demonstrated. However, the Scoliosis Research Society (SRS)-Schwab Grade 4 osteotomy, defined as resection of posterior elements, partial vertebral body, and superior adjacent disc, is rarely reported in the treatment of CK. PURPOSE: The present study aimed to evaluate the efficiency and safety of SRS-Schwab Grade 4 osteotomy in patients with CK, and to propose its optimal indication...
April 20, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29609565/the-clinical-relevance-of-the-presence-of-bridging-syndesmophytes-on-kyphosis-correction-and-maintenance-following-pedicle-subtraction-osteotomy-for-thoracolumbar-kyphotic-deformity-in-ankylosing-spondylitis-a-comparative-cohort-study
#15
Sai-Hu Mao, Zong-Xian Feng, Bang-Ping Qian, Yong Qiu
BACKGROUND: The presence of bridging syndesmophytes (BS) in spinal osteotomy region serves traditionally as one critical determinant for selection of osteotomy techniques. While nowadays the proportion of kyphotic ankylosing spondylitis (AS) patients receiving pedicle subtraction osteotomy (PSO) with yet mobile neighboring disc has seen a substantial increase. Literatures investigating the clinical relevance of the presence of BS on kyphosis correction and maintenance following PSO are scarce...
April 2, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29567792/prevalence-of-the-optic-disc-anomalies-in-the-adult-south-indian-population
#16
Shikha Talwar Bassi, Ronnie George, Swarnali Sen, Rashima Asokan, Vijaya Lingam
PURPOSE: To determine the prevalence of congenitally abnormal disc (all anomalies) in an adult population in southern India. METHODS: Subjects aged ≥40 years (n=6013) underwent a complete ophthalmic examination. Optic disc anomalies were diagnosed according to the definitions given in the article. RESULTS: Optic disc anomalies were found in 81 eyes of 66 (1.1%, 95% CIs 0.00834 to 0.01361) patients. The prevalence of each anomaly in the descending order was peripapillary myelinated nerve fibre (0...
March 22, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29561500/optic-disc-features-in-highly-myopic-eyes-the-zoc-bhvi-high-myopia-cohort-study
#17
Zhixi Li, Xinxing Guo, Ou Xiao, Pei Ying Lee, Ran Liu, Decai Wang, Padmaja Sankaridurg, Mingguang He
SIGNIFICANCE: Some studies reported that optic disc tilt and rotation might be risk factors for the susceptibility of high myopic eyes to develop glaucoma. However, data regarding optic disc manifestations in high myopia participants are few. It is crucial to characterize the features of optic disc manifestations among high myopes. PURPOSE: To describe optic disc characteristics of Chinese highly myopic eyes and to investigate associated factors. METHODS: This cross-sectional, observational study included 890 Chinese with bilateral high myopia (defined as ≤-6...
April 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29533036/-difference-of-spino-pelvic-sagittal-alignment-between-lumbar-disc-herniation-and-lumbar-canal-stenosis-in-adults
#18
Feng Xie, Jun Bian, Zhi-Wei Wang, Wei-Shan Chen
OBJECTIVE: To study the difference of spino-pelvic sagittal alignment between lumbar disc herniation(LDH) and lumbar canal stenosis(LCS) in adults. METHODS: The integrated imaging data of 88 patients with lumbar disc herniation (42 cases) or lumbar canal stenosis(46 cases) were searched from January 1, 2015 to September 10, 2016 in our hospital.Twenty-two cases were excluded because of age factor, 36 cases of LDH (LDH group) and 30 cases of LCS (LCS group) were internalized in the study...
January 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29516048/the-importance-of-ganglion-cell-complex-investigation-in-myopic-patients
#19
Maria Veronica Strehaianu, Dana Dascalescu, Catalina Ionescu, Miruna Burcel, Vasile Potop, Catalina Corbu
Glaucoma is an optic neuropathy that affects the ganglion cell complex in all its components: cell bodies, dendrites, and axons, the dendritic arbor being the first one damaged. This is the reason why the thickness of the ganglion cell and internal plexiform layers can be taken into account as an early predictor of the glaucomatous changes, along with the retinal nerve fiber layer (RNFL) thickness. However, due to disc tilting and peripapillary atrophy, the RNFL evaluation may be prone to errors in myopic patients...
October 2017: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29501748/a-novel-preoperative-trajectory-evaluation-method-for-l5-s1-transforaminal-percutaneous-endoscopic-lumbar-discectomy
#20
Sang Soo Eun, Sang-Ho Lee, Wei Chiang Liu, H Yener Erken
BACKGROUND CONTEXT: L5-S1 transforaminal percutaneous endoscopic lumbar discectomy (PELD) is a demanding procedure because of structures such as iliac crest, L5 transverse process, hypertrophic L5-S1 facet joint, and sacral ala. There has been no definite preoperative evaluation method to evaluate the surgical validity of L5-S1 transforaminal PELD. PURPOSE: The authors report a new preoperative trajectory evaluation method for L5-S1 transforaminal PELD using magnetic resonance imaging (MRI) or computed tomography (CT) examinations...
February 28, 2018: Spine Journal: Official Journal of the North American Spine Society
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