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https://www.readbyqxmd.com/read/29051885/the-reversed-less-invasive-stabilisation-system-distal-femur-technique-application-in-an-adult-patient-with-osteogenesis-imperfecta-sustaining-a-femoral-fracture
#1
Markus S Hanke, Marius Johann Keel, Inga A Todorski, Johannes Dominik Bastian
INTRODUCTION: The aim of this study was to report the surgical management and to discuss the options for fracture fixation in an adult patient with osteogenesis imperfecta (OI) who sustained a trochanteric femoral fracture after a simple fall from standing position. CASE REPORT: As a result of multiple fractures during childhood, this adult patient with OI presented with a short stature. The radiographs revealed a displaced, intertrochanteric fracture with subtrochanteric extension of the left femur...
May 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29047468/spectral-measurement-and-modeling-of-natural-rainbows
#2
Raymond L Lee
Although quantitative observations of rainbow spectra, colors, and luminances are needed for any comprehensive analysis of rainbow scattering theory, very little such data has been published. But new remote sensing tools now make possible the detailed spectral and colorimetric measurement of natural rainbows, which here are defined as bows seen in sunlit rain or water-drop sprays. To measure these often short-lived phenomena, both multispectral tools (colorimetrically calibrated RGB cameras) and hyperspectral tools (imaging spectrometers) are used to examine the spectral and angular fine structure of natural rainbows...
July 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29047465/transmission-bows-of-radially-inhomogeneous-spheres
#3
James A Lock, Philip Laven
We consider transmission scattering of a plane wave by a radially inhomogeneous sphere containing a localized region of refractive index decrease. In ray theory, the boundary conditions on the deflection angle at axial and grazing incidence determine that transmission scattering gives rise to an even number of bows, half of them being relative maximum bows and half being relative minimum bows. For a model refractive index profile, we determine the conditions under which different numbers of bows occur, and we suggest physical mechanisms responsible for producing them...
July 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28993894/the-association-of-lumbar-intervertebral-disc-calcification-on-plain-radiographs-with-the-ute-disc-sign-on-mri
#4
Uruj Zehra, Cora Bow, Jason Pui Yin Cheung, Henry Pang, William Lu, Dino Samartzis
PURPOSE: The pathogenesis and the clinical impact of disc calcification are not well known. Utilizing ultra-short time-to-echo (UTE) magnetic resonance imaging, the UTE Disc Sign (UDS) (i.e., hypo/hyper-intense disc band) was developed and found to be more significantly related to pain and disability than the conventional T2-weighted (T2W) MRI. It has been hypothesized that the UDS may represent mineralized deposits in the disc. The following study addressed the relationship between disc calcification on plain radiographs to that of the UDS on MRI...
October 9, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28967762/the-relative-importance-of-perceptual-and-memory-sampling-processes-in-determining-the-time-course-of-absolute-identification
#5
Duncan Guest, Christopher Kent, James S Adelman
In absolute identification, the extended generalized context model (EGCM; Kent & Lamberts, 2005, 2016) proposes that perceptual processing determines systematic response time (RT) variability; all other models of RT emphasize response selection processes. In the EGCM-RT the bow effect in RTs (longer responses for stimuli in the middle of the range) occurs because these middle stimuli are less isolated, and as perceptual information is accumulated, the evidence supporting a correct response grows more slowly than for stimuli at the ends of the range...
October 2, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28960740/predicting-aggressive-behaviour-in-acute-forensic-mental-health-units-a-re-examination-of-the-dynamic-appraisal-of-situational-aggression-s-predictive-validity
#6
Tessa Maguire, Michael Daffern, Steven J Bowe, Brian McKenna
In the present study, we explored the predictive validity of the Dynamic Appraisal of Situational Aggression (DASA) assessment tool in male (n = 30) and female (n = 30) patients admitted to the acute units of a forensic mental health hospital. We also tested the psychometric properties of the original DASA bands and novel risk bands. The first 60 days of each patient's file was reviewed to identify daily DASA scores and subsequent risk-related nursing interventions and aggressive behaviour within the following 24 hours...
October 2017: International Journal of Mental Health Nursing
https://www.readbyqxmd.com/read/28901617/dual-rotation-c-arm-cone-beam-computed-tomography-to-increase-low-contrast-detection
#7
Aymeric Reshef, Cyril Riddell, Yves Trousset, Saïd Ladjal, Isabelle Bloch
PURPOSE: This paper investigates the capabilities of a dual-rotation C-arm cone-beam computed tomography (CBCT) framework to improve non-contrast-enhanced low-contrast detection for full volume or volume-of-interest (VOI) brain imaging. METHOD: The idea is to associate two C-arm short-scan rotational acquisitions (spins): one over the full detector field of view (FOV) at low dose, and one collimated to deliver a higher dose to the central densest parts of the head...
September 2017: Medical Physics
https://www.readbyqxmd.com/read/28841612/implications-of-facial-asymmetry-in-rhinoplasty
#8
Rod J Rohrich, Nathaniel L Villanueva, Kevin H Small, Ronnie A Pezeshk
Many rhinoplasty patients present with a chief complaint of nasal deviation and are unaware of any inherent facial asymmetries; however, recognizing and discussing the interrelation between the deviated nose and facial asymmetry is an important consideration in surgical planning. The objective of this study was to evaluate whether a surgeon's subjective assessment of facial analysis in the setting of nasal deviation correlates with objective anthropometric measurements. In addition, this study sought to further quantify the frequency of facial asymmetry associated with nasal deviation to highlight important anatomical trends for the rhinoplasty surgeon...
September 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28791060/outcome-of-single-piece-intraocular-lens-sulcus-implantation-following-posterior-capsular-rupture-during-phacoemulsification
#9
Masomeh Mohebbi, Seyed Ali Bashiri, Seyed Farzad Mohammadi, Behnaz Samet, Fariba Ghassemi, Elham Ashrafi, Fatemeh Bazvand
PURPOSE: To assess the safety and outcome of single-piece posterior chamber intraocular lens (PC-IOL) implantation in the ciliary sulcus following posterior capsular rupture during cataract surgery. METHODS: Patients with posterior capsular rupture during cataract surgery with a single-piece acrylic IOL implanted into the ciliary sulcus were studied. Complete ocular examinations were performed after 6 months postoperatively. RESULTS: Twenty-four eyes were included...
July 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28767621/the-ute-disc-sign-on-mri-a-novel-imaging-biomarker-associated-with-degenerative-spine-changes-low-back-pain-and-disability
#10
Henry Pang, Cora Bow, Jason Pui Yin Cheung, Uruj Zehra, Arijitt Borthakur, Jaro Karppinen, Nozomu Inoue, Hai-Qiang Wang, Keith D K Luk, Kenneth M C Cheung, Dino Samartzis
STUDY DESIGN: Cross-sectional. OBJECTIVE: To assess the distribution of the ultra-short time-to-echo (UTE) Disc Sign (UDS).and its association with disc degeneration, other MRI phenotypes, pain and disability profiles. SUMMARY OF BACKGROUND DATA: Disc degeneration has been conventionally assessed by T2-weighted (T2W) signal intensity on MRI; however, its clinical utility has been questionable. UTE MRI assesses short T2 components. The authors have identified a new imaging biomarker on UTE - the UDS...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28610214/revised-morphology-of-i-pycnonemosaurus-i-i-nevesi-i-kellner-amp-campos-2002-theropoda-abelisauridae-and-its-phylogenetic-relationships
#11
Rafael Delcourt
Abelisaurid theropods were most abundant in the Gondwana during the Cretaceous Period. Pycnonemosaurus nevesi Kellner & Campos, 2002 was the first abelisaurid dinosaur described from the Bauru Group (Brazil, Upper Cretaceous). Nevertheless, its initial description was based on the comparison of a restricted number of remains with other abelisaurids. In this paper, I present a new description of the morphology of Pycnonemosaurus nevesi, including three new caudal transverse processes and a discussion of several new characteristics based on perspectives derived from recently described abelisauroids...
June 9, 2017: Zootaxa
https://www.readbyqxmd.com/read/28513695/surface-passivation-and-self-regulated-shell-growth-in-selective-area-grown-gan-al-ga-n-core-shell-nanowires
#12
Martin Hetzl, Julia Winnerl, Luca Francaviglia, Max Kraut, Markus Döblinger, Sonja Matich, Anna Fontcuberta I Morral, Martin Stutzmann
The large surface-to-volume ratio of GaN nanowires implicates sensitivity of the optical and electrical properties of the nanowires to their surroundings. The implementation of an (Al,Ga)N shell with a larger band gap around the GaN nanowire core is a promising geometry to seal the GaN surface. We investigate the luminescence and structural properties of selective area-grown GaN-(Al,Ga)N core-shell nanowires grown on Si and diamond substrates. While the (Al,Ga)N shell allows a suppression of yellow defect luminescence from the GaN core, an overall intensity loss due to Si-related defects at the GaN/(Al,Ga)N interface has been observed in the case of Si substrates...
June 1, 2017: Nanoscale
https://www.readbyqxmd.com/read/28448170/mechanical-circulatory-support-devices-methods-to-optimize-hemodynamics-during-use
#13
Ben Bow Chung, Gabriel Sayer, Nir Uriel
Introduction Mechanical circulatory support (MCS) is an increasingly utilized mode of therapy in the management of advanced heart failure, both as bridge to heart transplantation and destination therapy. As MCS becomes more prevalent, it is ever more important to understand the complex hemodynamics of these devices, as well as the strategies for hemodynamic optimization. Areas Covered This review provides an overview of hemodynamics in the normal human heart and the failing heart. We discuss the various short-term mechanical circulatory support devices and their hemodynamic consequences...
April 27, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28344721/examining-the-impact-of-early-longitudinal-patient-exposure-on-medical-students-career-choices
#14
Jason Kwok, Vincent Wu, Anthony Sanfilippo, Kathryn Bowes, Sheila Pinchin
BACKGROUND: Medical schools include career direction experiences to help students make informed career decisions. Most experiences are short, precluding students from attaining adequate exposure to long-term encounters within medicine. We investigated the impact of the First Patient Program (FPP), which fosters longitudinal patient exposure by pairing junior medical students with chronically ill patients through their healthcare journey, in instilling career direction. METHODS: Medical students who completed at least 6-months in the FPP participated in a cross-sectional survey...
February 2017: Canadian Medical Education Journal
https://www.readbyqxmd.com/read/28130634/x-linked-hypophosphatemia-and-growth
#15
REVIEW
R Fuente, H Gil-Peña, D Claramunt-Taberner, O Hernández, A Fernández-Iglesias, L Alonso-Durán, E Rodríguez-Rubio, F Santos
X-Linked hypophosphatemia (XLH) is the most common form of hereditary rickets caused by loss-of function mutations in the PHEX gene. XLH is characterized by hypophosphatemia secondary to renal phosphate wasting, inappropriately low concentrations of 1,25 dihydroxyvitamin D and high circulating levels of fibroblast growth factor 23 (FGF23). Short stature and rachitic osseous lesions are characteristic phenotypic findings of XLH although the severity of these manifestations is highly variable among patients. The degree of growth impairment is not dependent on the magnitude of hypophosphatemia or the extent of legs´ bowing and height is not normalized by chronic administration of phosphate supplements and 1α hydroxyvitamin D derivatives...
March 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28114059/improving-large-scale-image-retrieval-through-robust-aggregation-of-local-descriptors
#16
Syed Sameed Husain, Miroslaw Bober
Visual search and image retrieval underpin numerous applications, however the task is still challenging predominantly due to the variability of object appearance and ever increasing size of the databases, often exceeding billions of images. Prior art methods rely on aggregation of local scale-invariant descriptors, such as SIFT, via mechanisms including Bag of Visual Words (BoW), Vector of Locally Aggregated Descriptors (VLAD) and Fisher Vectors (FV). However, their performance is still short of what is required...
September 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28024779/early-orthodontic-treatment-for-class-iii-malocclusion-a-systematic-review-and-meta-analysis
#17
REVIEW
See Choong Woon, Badri Thiruvenkatachari
INTRODUCTION: Class III malocclusion affects between 5% and 15% of our population. The 2 most common dilemmas surrounding Class III treatment are the timing of treatment and the type of appliance. A number of appliances have been used to correct a Class III skeletal discrepancy, but there is little evidence available on their effectiveness in the long term. Similarly, early treatment of Class III malocclusion has been practiced with increasing interest. However, there has been no solid evidence on the benefits in the long term...
January 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27973546/effect-of-regulatory-element-dna-methylation-on-tissue-type-plasminogen-activator-gene-expression
#18
Sylvie Dunoyer-Geindre, Anne-Sophie Rivier-Cordey, Carlos Caetano, Richard J Fish, Egbert K O Kruithof
Expression of the tissue-type plasminogen activator gene (t-PA; gene name PLAT) is regulated, in part, by epigenetic mechanisms. We investigated the relationship between PLAT methylation and PLAT expression in five primary human cell types and six transformed cell lines. CpG methylation was analyzed in the proximal PLAT gene promoter and near the multihormone responsive enhancer (MHRE) -7.3 kilobase pairs upstream of the PLAT transcriptional start site (TSS, -7.3 kb). In Bowes melanoma cells, the PLAT promoter and the MHRE were fully unmethylated and t-PA secretion was extremely high...
2016: PloS One
https://www.readbyqxmd.com/read/27909144/bone-area-provides-a-responsive-outcome-measure-for-bone-changes-in-short-term-knee-osteoarthritis-studies
#19
Michael A Bowes, Rose A Maciewicz, John C Waterton, David J Hunter, Philip G Conaghan
OBJECTIVE: To analyze the 3-D bone area from an osteoarthritis (OA) cohort demonstrating no change in cartilage thickness. METHODS: Twenty-seven women with painful medial knee OA had magnetic resonance images at 0, 3, and 6 months. Images were analyzed using active appearance models. RESULTS: At 3 and 6 months, the mean change in medial femoral bone area was 0.34% (95% CI 0.04-0.64) and 0.61% (95% CI 0.32-0.90), respectively. Forty-one percent of the subjects had progression greater than the smallest detectable difference at 6 months...
December 2016: Journal of Rheumatology
https://www.readbyqxmd.com/read/27833291/a-case-report-of-acampomelic-campomelic-dysplasia-and-operative-difficulties-in-cleft-palate-reconstruction
#20
M Pasupathy, Vasant Radhakrishnan, Hirji Sorab Adenwalla, Puthucode V Narayanan
Acampomelic campomelic dysplasia (CD) is a type of CD (CD; OMIM #114290), a rare form of congenital short-limbed dwarfism and is due to mutations in SOX9 gene family. Characteristic phenotypes of CD include bowing of the lower limbs, a narrow thoracic cage, 11 pairs of ribs, hypoplastic scapulae, macrocephaly, flattened supraorbital ridges and nasal bridge, cleft palate and micrognathia. The bending of the long bones is not an obligatory feature and is absent in about 10% of cases, referred to as acampomelic CD...
May 2016: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
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