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https://www.readbyqxmd.com/read/28819597/case-report-oblique-fracture-of-the-ulnar-sesamoid-bone-of-the-metacarpophalangeal-joint-a-rare-pathology
#1
Dauwe Jan, Van der Cruyssen Fréderic, De Smet Luc
INTRODUCTION: Fractures of the sesamoid bones of the metacarpophalangeal joint (MCPJ) are a rare pathology in hand trauma. Only a few case reports and case series were found in literature. The diagnosis of an ulnar sesamoid bone fracture of the MCPJ is difficult and can pose a differential diagnostic problem with Stener lesions or ulnar collateral ligament (UCL) instability. This pathology is frequently missed with subsequent poor functional outcomes. Correct and early diagnosis is important as this will allow for correct treatment with full recovery of function without sequelae...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28805873/emission-color-tuning-of-core-shell-upconversion-nanoparticles-through-modulation-of-laser-power-or-temperature
#2
Qiyue Shao, Gongtuo Zhang, Lilai Ouyang, Yanqing Hu, Yan Dong, Jianqing Jiang
Upconversion nanoparticles (UCNPs) are an excellent choice to construct security features against counterfeiting, owing to their unique NIR-to-VIS upconversion luminescence (UCL) characteristics. However, the application of upconversion materials is limited, due to their single and invariant emission colors. Herein, the temperature-dependent UCL properties of NaGdF4:Yb/Ho (or Tm) UCNPs in the solid state have been investigated. An anomalous UCL enhancement at higher temperatures has been demonstrated for these small-sized (<10 nm) UCNPs and the underlying mechanism is discussed herein...
August 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/28783235/tuning-plasmonic-enhancement-of-single-nanocrystal-upconversion-luminescence-by-varying-gold-nanorod-diameter
#3
Yingxian Xue, Chengjie Ding, Youying Rong, Qiang Ma, Chengda Pan, E Wu, Botao Wu, Heping Zeng
Plasmonic enhancement induced by metallic nanostructures is an effective strategy to improve the upconversion efficiency of lanthanide-doped nanocrystals. It is demonstrated that plasmonic enhancement of the upconversion luminescence (UCL) of single NaYF4 :Yb(3+) /Er(3+) /Mn(2+) nanocrystal can be tuned by tailoring scattering and absorption cross sections of gold nanorods, which is synthesized wet chemically. The assembly of the single gold nanorod and single upconversion nanocrystal is achieved by the atomic force microscope probe manipulation...
August 7, 2017: Small
https://www.readbyqxmd.com/read/28774254/can-physical-examination-create-a-stener-lesion
#4
Manesha Lankachandra, John P Eggers, James W Bogener, Richard L Hutchison
BACKGROUND: The purpose of this study is to determine whether a Stener lesion can be created while testing stability of the ulnar collateral ligament (UCL) of the thumb. Testing was performed in a manner that reproduced clinical examination. METHODS: Six fresh frozen hand and forearm specimens underwent sequential sectioning of the accessory UCL, the proper UCL, and the ulnar sagittal band. Measurements of radial deviation of the metacarpophalangeal (MCP) joint were taken with the thumb in neutral rotation, pronation and supination, both with 0 degrees and with 30 degrees of flexion of the MCP joint...
September 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28774189/variation-in-the-rate-of-surgery-for-ulnar-collateral-ligament-injury-of-the-metacarpophalangeal-joint-of-the-thumb
#5
Nicky Stoop, Teun Teunis, David Ring, Kyle R Eberlin
BACKGROUND: The indications for repair of rupture of the ulnar collateral ligament (UCL) of the metacarpophalangeal (MP) joint of the thumb are debated. We studied factors predictive of operative treatment. METHODS: In this retrospective study, we queried the research database from 3 affiliated urban hospitals in a single city in the United States and identified 383 patients with a thumb MP UCL injury. We recorded age, sex, treating surgeon, and whether or not a magnetic resonance imaging (MRI) was ordered...
November 1, 2016: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28751970/service-evaluation-of-the-implementation-of-a-digitally-enabled-care-pathway-for-the-recognition-and-management-of-acute-kidney-injury
#6
Alistair Connell, Hugh Montgomery, Stephen Morris, Claire Nightingale, Sarah Stanley, Mary Emerson, Gareth Jones, Omid Sadeghi-Alavijeh, Charles Merrick, Dominic King, Alan Karthikesalingam, Cian Hughes, Joseph Ledsam, Trevor Back, Geraint Rees, Rosalind Raine, Christopher Laing
Acute Kidney Injury (AKI), an abrupt deterioration in kidney function, is defined by changes in urine output or serum creatinine. AKI is common (affecting up to 20% of acute hospital admissions in the United Kingdom), associated with significant morbidity and mortality, and expensive (excess costs to the National Health Service in England alone may exceed £1 billion per year). NHS England has mandated the implementation of an automated algorithm to detect AKI based on changes in serum creatinine, and to alert clinicians...
2017: F1000Research
https://www.readbyqxmd.com/read/28738648/matrix-interference-evaluation-employing-gc-and-lc-coupled-to-triple-quadrupole-tandem-mass-spectrometry
#7
S Uclés, A Lozano, A Sosa, P Parrilla Vázquez, A Valverde, A R Fernández-Alba
Gas and liquid chromatography coupled to triple quadrupole tandem mass spectrometry are currently the most powerful tools employed for the routine analysis of pesticide residues in food control laboratories. However, whatever the multiresidue extraction method, there will be a residual matrix effect making it difficult to identify/quantify some specific compounds in certain cases. Two main effects stand out: (i) co-elution with isobaric matrix interferents, which can be a major drawback for unequivocal identification, and therefore false negative detections, and (ii) signal suppression/enhancement, commonly called the "matrix effect", which may cause serious problems including inaccurate quantitation, low analyte detectability and increased method uncertainty...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738083/the-influence-of-sex-and-trauma-impact-on-the-rupture-site-of-the-ulnar-collateral-ligament-of-the-thumb
#8
Sandra Boesmueller, Wolfgang Huf, Gregor Rettl, Falko Dahm, Alexander Meznik, Gabriela Muschitz, Hugo Kitzinger, Adam Bukaty, Christian Fialka, Martin Vierhapper
PURPOSE AND HYPOTHESIS: Although sex- and gender-specific analyses have been gaining more attention during the last years they have rarely been performed in orthopaedic literature. The primary purpose of this study was to investigate whether for injuries of the UCL the specific location of the rupture is influenced by sex. A secondary study question addressed the sex-independent effect of trauma intensity on the rupture site of the UCL. METHODS: This study is a retrospective analysis of all patients with either a proximal or distal bony avulsion or with a mid-substance tear or ligament avulsion of the UCL treated surgically between 1992 and 2015 at two level-I trauma centres...
2017: PloS One
https://www.readbyqxmd.com/read/28735845/anterior-and-posterior-bands-of-the-anterior-bundle-in-the-elbow-ulnar-collateral-ligament-ultrasound-anatomy
#9
Masahito Yoshida, Hideyuki Goto, Tetsuya Takenaga, Atsushi Tsuchiya, Katsumasa Sugimoto, Volker Musahl, Freddie Fu, Takanobu Otsuka
BACKGROUND: The anterior oblique bundle (AOL) of the ulnar collateral ligament (UCL) is composed of anterior and posterior bands. This study evaluated the anatomy of the anterior and posterior bands in the AOL of the UCL for their separate visualization with ultrasound (US). METHODS: We dissected 18 cadaveric elbow joints and recorded the direction of each band from the lateral view to determine the proper position for the US transducer. To determine the proper inclination of the transducer, we measured the inclinations of each band at the proximal and distal insertions from the transverse view...
July 20, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28734533/changes-in-pitching-mechanics-after-ulnar-collateral-ligament-reconstruction-in-major-league-baseball-pitchers
#10
Daniel A Portney, Jake M Lazaroff, Lucas T Buchler, Stephen M Gryzlo, Matthew D Saltzman
BACKGROUND: Medial ulnar collateral ligament (UCL) reconstruction is a common procedure performed on Major League Baseball pitchers. Variations in pitching mechanics before and after UCL reconstructive surgery are not well understood. METHODS: Publicly available pitch tracking data (PITCHf/x) were compared for all Major League Baseball pitchers who underwent UCL reconstruction between 2008 and 2013. Specific parameters analyzed were fastball percentage, release location, velocity, and movement of each pitch type...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28730863/non-operative-management-of-ulnar-collateral-ligament-injuries-in-the-throwing-athlete
#11
Mia Smucny, Robert W Westermann, Matthew Winters, Mark S Schickendantz
Medial ulnar collateral ligament (UCL) injuries have become increasingly prevalent in overhead athletes. The orthopaedic literature contains a wealth of information on operative management of these injuries. However, there are few high-quality longitudinal studies on non-operative care of UCL injuries. The purpose of this review is to describe the non-operative approach to managing UCL injuries, including recommended rehabilitation strategies and predictors of successful non-operative treatment.
July 21, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28692505/presurgical-orthopedic-treatment-using-modified-nostril-retainers-in-patients-with-unilateral-cleft-lip-with-or-without-cleft-palate
#12
Serap Titiz, Aynur Aras
This study aimed to present a new technique for presurgical orthopedic treatment of patients with unilateral cleft lip with or without cleft palate (UCL±P) by means of modified nostril retainers manufactured using a special mold with soft acrylic or orthodontic acrylics material. Nasal molding with the modified nostril retainer is considerably effective and comfortable for the patient.
July 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28686275/power-dependent-upconversion-quantum-yield-of-nayf4-yb-3-er-3-nano-and-micrometer-sized-particles-measurements-and-simulations
#13
Martin Kaiser, Christian Würth, Marco Kraft, Iko Hyppänen, Tero Soukka, Ute Resch-Genger
Photophysical studies of nonlinear lanthanide-doped photon upconverting nanoparticles (UCNPs) increasingly used in biophotonics and photovoltaics require absolute measurements of the excitation power density (P)-dependent upconversion luminescence (UCL) and luminescence quantum yields (ΦUC) for quantifying the material performance, UCL deactivation pathways, and possible enhancement factors. We present here the P-dependence of the UCL spectra, ΦUC, and slope factors of the different emission bands of representative 25 nm-sized oleate-capped β-NaYF4:17% Yb(3+), 3% Er(3+) UCNPs dispersed in toluene and as powder as well as ΦUC of 3 μm-sized upconversion particles (UCμP), all measured with a newly designed integrating sphere setup, enabling controlled variation of P over four orders of magnitude...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28666051/multimodality-approach-to-a-stener-lesion-radiographic-ultrasound-magnetic-resonance-imaging-and-surgical-correlation
#14
Jonathan Tresley, Adam D Singer, Elizabeth A Ouellette, Jason Blaichman, Paul D Clifford
The ulnar collateral ligament (UCL) of the thumb metacarpophalangeal joint is a static stabilizer that may rupture from a hyperabduction injury. Although some UCL tears may heal with immobilization, outcomes are worse for Stener lesions, in which the proximal ligament stump slips out from beneath the adductor pollicis aponeurosis and is entrapped proximal and superficial to the aponeurosis, preventing primary healing. We report the case of a patient with a Stener lesion with radiographic, ultrasound, and magnetic resonance imaging correlation, subsequently confirmed with intraoperative photographs...
May 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28662927/endovascular-treatment-of-abdominal-aortic-aneurysms-with-narrow-aortic-bifurcation-using-excluder-bifurcated-stent-grafts
#15
Pablo Marques De Marino, Isaac Martinez Lopez, Ferran Pla Sanchez, Iñaki Cernuda Artero, Maday Cabrero Fernandez, Oscar Ucles Cabeza, Francisco Javier Serrano Hernando
OBJECTIVE: This study investigated the influence of the aortic bifurcation anatomy on the endovascular treatment of abdominal aortic aneurysms using Excluder (W. L. Gore & Associates, Flagstaff, Ariz) bifurcated stent grafts. METHODS: This was a retrospective single-center study of patients treated with the Excluder stent graft. Analysis included anatomical factors of the aortic bifurcation (aortic bifurcation diameter [ABD], calcification, thrombus), characteristics of the stent graft limbs (sum of stent graft limbs diameters [SLD]), and the SLD/ABD ratio...
June 26, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28657091/depleted-upconversion-luminescence-in-nayf4-yb-3-tm-3-nanoparticles-via-simultaneous-two-wavelength-excitation
#16
Hongxin Zhang, Tianqing Jia, Long Chen, Yuchan Zhang, Shian Zhang, Donghai Feng, Zhenrong Sun, Jianrong Qiu
We report optical depletion of upconversion luminescence (UCL) in NaYF4:Yb(3+),Tm(3+) nanoparticles excited simultaneously by 980 nm and 1550 nm lasers. The UCL intensity is greatly depleted, while the downshifted emission at 1210 nm is obviously enhanced. The disturbances of 1550 nm photons on energy transfer between Yb(3+) and Tm(3+), cross relaxation (CR), the thermal effect and the stimulated emission depletion (STED) process are qualitatively evaluated. Our investigations verify that the unexpected depletion phenomena are governed by the STED process...
July 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28656192/nd-3-sensitized-multicolor-upconversion-luminescence-from-a-sandwiched-core-shell-shell-nanostructure
#17
Shuwei Hao, Guanying Chen, Chunhui Yang, Wei Shao, Wei Wei, Yang Liu, Paras N Prasad
Lanthanide-doped upconversion nanoparticles (UCNPs) have attracted interest for use in bioimaging, biosensing, and therapeutic applications. These motivations are empowered by multicolor upconversion luminescence (UCL) under single near infrared wavelength excitation at ∼980 nm. However, this wavelength overlaps with the absorption peak of water that is dominant in the biological environment, eliciting a serious biological heating problem. This study reports tailored multicolor UCL from a Nd(3+)-sensitized sandwich-structure of core/shell/shell UCNPs of NaYbF4:0...
August 3, 2017: Nanoscale
https://www.readbyqxmd.com/read/28654765/a-traffic-light-grading-system-of-hip-dysplasia-to-predict-the-success-of-arthroscopic-hip-surgery
#18
George Grammatopoulos, Owain L I Davies, Ahmed El-Bakoury, Harinderjit S Gill, Tom C B Pollard, Antonio J Andrade
BACKGROUND: The role of hip arthroscopic surgery in dysplasia is controversial. PURPOSE: To determine the 7-year joint preservation rate after hip arthroscopic surgery in hip dysplasia and identify anatomic and intraoperative features that predict the success of hip preservation with arthroscopic surgery, allowing the formulation of an evidence-based classification system. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: Between 2008 and 2013, 111 hips with dysplastic features (acetabular index [AI] >10° and/or lateral center-edge angle [LCEA] <25°) that underwent arthroscopic surgery were identified...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28650053/in-situ-crystal-growth-of-gold-nanocrystals-on-upconversion-nanoparticles-for-synergistic-chemo-photothermal-therapy
#19
Ruoyan Wei, Wensong Xi, Haifang Wang, Jinliang Liu, Torsten Mayr, Liyi Shi, Lining Sun
A multifunctional cancer therapy nanocomposite was proposed and synthesized by linking the pH-responsive SH-PEG-DOX prodrug onto gold nanocrystals that were grown in situ on the surface of upconversion nanoparticles (UCNPs). In the structure of the SH-PEG-DOX prodrug, a hydrazone bond was utilized for subsequent pH-responsive drug release in the intracellular acidic microenvironment of cancer cells. This innovative assembly method is facile and mild, and can be used to obtain nanocomposites of UCNPs and gold, which show excellent photostability and biocompatibility...
June 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28637740/tablet-computers-versus-optical-aids-to-support-education-and-learning-in-children-and-young-people-with-low-vision-protocol-for-a-pilot-randomised-controlled-trial-create-children-reading-with-electronic-assistance-to-educate
#20
Michael D Crossland, Rachel Thomas, Hilary Unwin, Seelam Bharani, Vijaya K Gothwal, Ana Quartilho, Catey Bunce, Annegret Dahlmann-Noor
INTRODUCTION: Low vision and blindness adversely affect education and independence of children and young people. New 'assistive' technologies such as tablet computers can display text in enlarged font, read text out to the user, allow speech input and conversion into typed text, offer document and spreadsheet processing and give access to wide sources of information such as the internet. Research on these devices in low vision has been limited to case series. METHODS AND ANALYSIS: We will carry out a pilot randomised controlled trial (RCT) to assess the feasibility of a full RCT of assistive technologies for children/young people with low vision...
June 21, 2017: BMJ Open
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