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https://www.readbyqxmd.com/read/28821974/mri-histogram-analysis-enables-objective-and-continuous-classification-of-intervertebral-disc-degeneration
#1
Christian Waldenberg, Hanna Hebelka, Helena Brisby, Kerstin Magdalena Lagerstrand
PURPOSE: Magnetic resonance imaging (MRI) is the best diagnostic imaging method for low back pain. However, the technique is currently not utilized in its full capacity, often failing to depict painful intervertebral discs (IVDs), potentially due to the rough degeneration classification system used clinically today. MR image histograms, which reflect the IVD heterogeneity, may offer sensitive imaging biomarkers for IVD degeneration classification. This study investigates the feasibility of using histogram analysis as means of objective and continuous grading of IVD degeneration...
August 18, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28821774/pre-coincidence-brain-activity-predicts-the-perceptual-outcome-of-streaming-bouncing-motion-display
#2
Song Zhao, Yajie Wang, Lina Jia, Chengzhi Feng, Yu Liao, Wenfeng Feng
When two identical visual discs move toward each other on a two-dimensional visual display, they can be perceived as either "streaming through" or "bouncing off" each other after their coincidence. Previous studies have observed a strong bias toward the streaming percept. Additionally, the incidence of the bouncing percept in this ambiguous display could be increased by various factors, such as a brief sound at the moment of coincidence and a momentary pause of the two discs. The streaming/bouncing bistable motion phenomenon has been studied intensively since its discovery...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821444/circumferential-fusion-a-comparative-analysis-between-anterior-lumbar-interbody-fusion-with-posterior-pedicle-screw-fixation-and-transforaminal-lumbar-interbody-fusion-for-l5-s1-isthmic-spondylolisthesis
#3
Erik Y Tye, Joseph E Tanenbaum, Andrea S Alonso, Roy Xiao, Michael P Steinmetz, Thomas E Mroz, Jason W Savage
BACKGROUND CONTEXT: Transforaminal lumbar interbody fusion (TLIF) or anterior lumbar interbody fusion with percutaneous pedicle screws (ALIFPS) offer significantly higher radiographic fusion rates than other fusion techniques for L5-S1 isthmic spondylolisthesis (IS). As it stands, there is a relative paucity of comparative data of the two techniques. PURPOSE: To define the clinical, radiographic, and financial differences between TLIF and ALIFPS for L5-S1 IS. STUDY DESIGN/SETTING: A retrospective cohort study conducted at a single-tertiary care center...
August 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28820687/identification-of-subsets-of-enteroaggregative-escherichia-coli-associated-with-diarrheal-disease-among-under-5-year-old-children-from-rural-gambia
#4
Usman N Ikumapayi, Nadia Boisen, Mohammad J Hossain, Modupeh Betts, Modou Lamin, Debasish Saha, Brenda Kwambana-Adams, Michel Dione, Richard A Adegbola, Anna Roca, James P Nataro, Martin Antonio
Enteroaggregative Escherichia coli (EAEC) cause acute and persistent diarrhea, mostly in children worldwide. Outbreaks of diarrhea caused by EAEC have been described, including a large outbreak caused by a Shiga toxin expressing strain. This study investigated the association of EAEC virulence factors with diarrhea in children less than 5 years. We characterized 428 EAEC strains isolated from stool samples obtained from moderate-to-severe diarrhea cases (157) and healthy controls (217) children aged 0-59 months recruited over 3 years as part of the Global Enteric Multicenter Study (GEMS) in The Gambia...
August 7, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28820168/therapeutic-surprise-photodynamic-therapy-for-cavernous-haemangioma-of-the-disc
#5
Mahesh P Shanmugam, Rajesh Ramanjulu, Shyamal Dwivedi, Aditya Barigali, Ajith Havanje
PURPOSE: To report the response of cavernous haemangioma of the disc to PDT. METHODS AND PATIENTS: A 32 years old lady presented to us with complaints of sudden onset of blurry vision in her right eye. What seemed initially as polypoidal choroidal vasculopathy turned out as cavernous haemangioma of the disc after pneumatic displacement of the sub-retinal haeme. She was treated with PDT as she was prone to recurrent haemorrhage from the lesion due to her low platelet count...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28819712/optical-coherence-tomography-to-differentiate-papilledema-from-pseudopapilledema
#6
REVIEW
Gema Rebolleda, Aki Kawasaki, Victoria de Juan, Noelia Oblanca, Francisco Jose Muñoz-Negrete
PURPOSE OF REVIEW: Mild papilledema may be difficult to distinguish by clinical observation from pseudopapilledema. An accurate diagnosis is critical to avoid invasive workup and unwarranted treatment. In this review, we focus on the development and subsequent role of optical coherence tomography (OCT) in detecting and differentiating optic nerve head drusen (ONHD) from papilledema and other causes of acquired swelling of the optic disc. RECENT FINDINGS: Newer OCT technologies which permit deeper penetration to improve detection of ONHD were also reviewed...
August 17, 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28819650/wear-behavior-of-al-7-si-0-3-mg-melon-shell-ash-particulate-composites
#7
M Abdulwahab, R M Dodo, I Y Suleiman, A I Gebi, I Umar
The present study examined wear characteristics of A356/melon shell ash particulate composites. Dry-sliding the stainless steel ball against specimen disc revealed the abrasive wear behavior of the composites under loads of 2 and 5N. The composite showed lower wear rate of 2.182 × 10(-4) mm(3)/Nm at 20 wt% reinforced material under load of 5N. Results showed that wear rate decreased significantly with increasing weight percentage of melon shell ash particles. Microstructural analyses of worn surfaces of the composites reveal evidence of plastic deformation of matrix phase...
August 2017: Heliyon
https://www.readbyqxmd.com/read/28819180/egfr-is-a-pivotal-regulator-of-thrombin-mediated-inflammation-in-primary-human-nucleus-pulposus-culture
#8
Bor-Ren Huang, Tzu-Sheng Chen, Da-Tian Bau, I-Chen Chuang, Cheng-Fang Tsai, Pei-Chun Chang, Dah-Yuu Lu
We found that the coagulation and cytokine pathways were important mechanisms involve in the degeneration of intervertebral discs (IVD) using a microarray approach to analyze gene expression in different grades of specimens. Furthermore, using a cytokine/chemokine array, a significant increase in CXCL8 expression was observed in human nucleus pulposus (NP) cells after thrombin treatment. The enhancement of CXCL8 expression by thrombin was activated by the PAR1 receptor. Importantly, analysis of degenerated human NP tissue samples showed that EGFR expression positively correlated with the grade of tissue degeneration...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818575/beta-lactam-resistance-among-haemophilus-influenzae-isolates-in-poland
#9
Marlena Kiedrowska, Alicja Kuch, Dorota Żabicka, Izabela Waśko, Patrycja Ronkiewicz, Katarzyna Wasiak, Katarzyna Bojarska, Waleria Hryniewicz, Anna Skoczyńska
OBJECTIVES: Haemophilus influenzae is a human-specific Gram-negative coccobacillus responsible for a significant number of respiratory tract infections and severe invasive infections such as meningitis and sepsis. The purpose of the study was to characterize the mechanisms of β-lactam resistance among Polish H. influenzae isolates and to evaluate the methods applied. METHODS: The study was conducted on 117 Polish H. influenzae isolates collected in 2012. Minimal inhibitory concentrations (MICs) were assessed by the broth microdilution method...
August 14, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28818544/trends-in-antimicrobial-resistance-in-bloodstream-infection-isolates-at-a-large-urban-hospital-in-malawi-1998-2016-a-surveillance-study
#10
Patrick Musicha, Jennifer E Cornick, Naor Bar-Zeev, Neil French, Clemens Masesa, Brigitte Denis, Neil Kennedy, Jane Mallewa, Melita A Gordon, Chisomo L Msefula, Robert S Heyderman, Dean B Everett, Nicholas A Feasey
BACKGROUND: Bacterial bloodstream infection is a common cause of morbidity and mortality in sub-Saharan Africa, yet few facilities are able to maintain long-term surveillance. The Malawi-Liverpool-Wellcome Trust Clinical Research Programme has done sentinel surveillance of bacteraemia since 1998. We report long-term trends in bloodstream infection and antimicrobial resistance from this surveillance. METHODS: In this surveillance study, we analysed blood cultures that were routinely taken from adult and paediatric patients with fever or suspicion of sepsis admitted to Queen Elizabeth Central Hospital, Blantyre, Malawi from 1998 to 2016...
August 14, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28818339/impact-of-machining-on-the-flexural-fatigue-strength-of-glass-and-polycrystalline-cad-cam-ceramics
#11
Sara Fraga, Marina Amaral, Marco Antônio Bottino, Luiz Felipe Valandro, Cornelis Johannes Kleverlaan, Liliana Gressler May
OBJECTIVES: To assess the effect of machining on the flexural fatigue strength and on the surface roughness of different computer-aided design, computer-aided manufacturing (CAD/CAM) ceramics by comparing machined and polished after machining specimens. METHODS: Disc-shaped specimens of yttria-stabilized polycrystalline tetragonal zirconia (Y-TZP), leucite-, and lithium disilicate-based glass ceramics were prepared by CAD/CAM machining, and divided into two groups: machining (M) and machining followed by polishing (MP)...
August 14, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28817711/on-chip-detection-of-gel-transition-temperature-using-a-novel-micro-thermomechanical-method
#12
Tsenguun Byambadorj, Erfan Dashtimoghadam, Mohamadali Malakoutian, Benyamin Davaji, Lobat Tayebi, James E Richie, Chung Hoon Lee
We present a new thermomechanical method and a platform to measure the phase transition temperature at microscale. A thin film metal sensor on a membrane simultaneously measures both temperature and mechanical strain of the sample during heating and cooling cycles. This thermomechanical principle of operation is described in detail. Physical hydrogel samples are prepared as a disc-shaped gels (200 μm thick and 1 mm diameter) and placed between an on-chip heater and sensor devices. The sol-gel transition temperature of gelatin solution at various concentrations, used as a model physical hydrogel, shows less than 3% deviation from in-depth rheological results...
2017: PloS One
https://www.readbyqxmd.com/read/28817389/congenital-anomalies-of-the-optic-disc-insights-from-optical-coherence-tomography-imaging
#13
Karen W Jeng-Miller, Dean M Cestari, Eric D Gaier
PURPOSE OF REVIEW: Congenital anomalies of the optic nerve are rare but significant causes of visual dysfunction in children and adults. Accurate diagnosis is dependent on a thorough funduscopic examination, but can be enhanced by imaging information garnered from optical coherence tomography (OCT). We review common congenital optic nerve anomalies, including optic disc pit, optic nerve coloboma, morning glory disc anomaly, and hypoplasia of the optic nerve, review their systemic associations, and discuss insights from OCT imaging...
August 16, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28816828/coronal-decompensation-after-posterior-only-thoracolumbar-hemivertebra-resection-and-short-fusion-in-young-children-with-congenital-scoliosis
#14
Song Li, Zhong-Hui Chen, Yong Qiu, Liang Xu, Xi Chen, Chang-Zhi Du, Ze-Zhang Zhu, Xu Sun
STUDY DESIGN: A retrospective study. OBJECTIVE: To determine the incidence and risk factors of coronal decompensation after posterior-only thoracolumbar hemivertebra (HV) resection and short fusion in patients younger than 5 years old. SUMMARY OF BACKGROUND DATA: Postoperative coronal decompensation may occur in operated patients during the follow-up. However, there is a paucity of valid data regarding this complication in very young patients with thoracolumbar HV...
August 14, 2017: Spine
https://www.readbyqxmd.com/read/28816825/is-two-level-cervical-disc-replacement-more-cost-effective-than-anterior-cervical-discectomy-and-fusion-at-7-years
#15
Robert K Merrill, Steven J McAnany, Todd J Albert, Sheeraz A Qureshi
STUDY DESIGN: Cost-effectiveness analysis. OBJECTIVE: Investigate the 7-year cost-effectiveness of two-level cervical disc replacement (CDR) and anterior cervical discectomy and fusion (ACDF). SUMMARY OF BACKGROUND DATA: CDR and ACDF are both effective treatment strategies for managing degenerative conditions of the cervical spine. CDR has been shown to be a more-cost effective intervention in the short term, but the long-term cost-effectiveness has not been established...
August 14, 2017: Spine
https://www.readbyqxmd.com/read/28816821/adjacent-segment-disease-after-cervical-spine-fusion-evaluation-of-a-70-patient-long-term-follow-up
#16
Mohamed Alhashash, Mootaz Shousha, Heinrich Boehm
STUDY DESIGN: A retrospective study of 70 patients undergoing surgical treatment for adjacent segment disease (ASD) after anterior cervical decompression and fusion (ACDF). OBJECTIVES: To analyze the risk factors for the development of ASD in patients who underwent ACDF. SUMMARY OF BACKGROUND DATA: ACDF has provided a high rate of clinical success for the cervical degenerative disc disease; nevertheless, adjacent segment degeneration has been reported as a complication at the adjacent level secondary to the rigid fixation...
August 14, 2017: Spine
https://www.readbyqxmd.com/read/28816527/use-of-whey-as-a-culture-medium-for-bacillus-clausii-for-the-production-of-protein-hydrolysates-with-antimicrobial-and-antioxidant-activity
#17
Jesús J Rochín-Medina, Hilda K Ramírez-Medina, Jesús G Rangel-Peraza, Karen V Pineda-Hidalgo, Pablo Iribe-Arellano
The use of whey as a natural culture medium to produce hydrolysates with antimicrobial from Bacillus clausii is the objective of this research. The fermentation process was carried out at 25 ℃ for five days, where proteolytic activity, soluble peptides quantification, and antimicrobial activity using the disc diffusion method were determined every day. The fermented whey reached values ​​of proteolytic activity between 90 and 260 U ml(-1) and a production of soluble peptides between 100 and 2070 µg ml(-1)...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28815502/flping-genes-on-and-off-in-drosophila
#18
Bonnie M Weasner, Jinjin Zhu, Justin P Kumar
The fruit fly, Drosophila melanogaster, has been a favorite experimental system of developmental biologists for more than a century. One of the most attractive features of this model system is the clarity by which one can analyze mutant phenotypes. Most genes are found in single copies, and loss-of-function mutants often have obvious phenotypes that can be analyzed during development and in adulthood. As with all metazoans, a significant fraction of Drosophila genes are used during both embryonic and postembryonic development, and null mutants often die during embryogenesis thereby precluding the analysis of postembryonic tissues...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28815393/pattern-noise-pano-a-new-automated-functional-glaucoma-test
#19
Sylvain El-Khoury, Thomas Hannen, Diana Carmen Dragnea, Faustin Ngounou, Paul-Rolf Preußner
PURPOSE: To present a newly developed visual field device (pattern noise: PANO) designed to be sensitive to glaucoma defects, cost-effective, material-practical and easy to repair and therefore particularly suited for low-income countries, where glaucoma can be highly prevalent (e.g. sub-Saharan Africa). METHODS: This is primarily a descriptive paper, but it also includes a prospective matched case-control pilot study. Hardware, stimulus, target configuration, testing strategy and result sheet are described...
August 16, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28815167/response-to-objective-functional-testing-in-patients-with-lumbar-degenerative-disc-disease
#20
Kevin Phan, Ralph J Mobbs
No abstract text is available yet for this article.
June 2017: Global Spine Journal
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