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https://www.readbyqxmd.com/read/29785859/apposition-and-positioning-of-the-nellix-endovascular-aneurysm-sealing-system-in-the-infrarenal-aortic-neck
#1
Kim van Noort, Simon P Overeem, Ruben van Veen, Jan M M Heyligers, Michel M P J Reijnen, Richte C L Schuurmann, Cornelis H Slump, Rogier Kropman, Jean-Paul P M de Vries
PURPOSE: To investigate the initial proximal position and seal of the Nellix EndoVascular Aneurysm Sealing (EVAS) system in the aortic neck using a novel methodology. METHODS: Forty-six consecutive patients who underwent elective EVAS for an abdominal aortic aneurysm were retrospectively selected and dichotomized into an early (n = 23) and a late (n = 23) group. The aortic neck morphology and aortic neck surface (ANS) were determined on preoperative computed tomography (CT) scans; the endograft position and nonapposition surface (NAS) were determined on the 1-month CT scans...
May 1, 2018: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/29785552/suppression-of-pupillary-unrest-by-general-anesthesia-and-propofol-sedation
#2
Matthias Behrends, Merlin D Larson, Andrew E Neice, Michael P Bokoch
The pupil undergoes irregular oscillations when exposed to light. These oscillations, known as pupillary unrest in ambient light, originate from oscillatory activity within the Edinger-Westphal nucleus in the midbrain. The midbrain and upper pons also contain nuclei known to be very sensitive to the effects of anesthetics that play a central role in maintaining wakefulness. We hypothesized that anesthetics may display similar effects on wakefulness and pupillary unrest. Repeat measurements of pupillary unrest using infrared pupillometry were performed in 16 patients undergoing general anesthesia and 8 patients undergoing propofol sedation...
May 21, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29785333/acral-lentiginous-melanoma-in-the-turkish-population-and-a-new-dermoscopic-clue-for-the-diagnosis
#3
Fezal Ozdemir, Micol A Errico, Banu Yaman, Isil Karaarslan
Background: The incidence of acral lentiginous melanoma (ALM) in the white population is low. Dermoscopy enhances diagnosis of ALM; however, diagnostic accuracy may sometimes be poor due to the considerable proportion of amelanotic ALM variants. Objectives: To calculate the proportion of ALM among all melanoma subtypes and to determine the frequency of dermoscopic features of ALM in the Turkish population. Methods: Out of 612 melanomas, there were 70 cases of ALM, of which 46 showed sufficient image quality for retrospective study of dermoscopic features...
April 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29785330/dermoscopy-of-a-spark-s-nevus
#4
Giovanni Biondo, Matteo Gnone, Simona Sola, Carlotta Pastorino, Cesare Massone
Spark's nevus is a particular type of melanocytic nevus that on histology shows features of both Spitz's and Clark's nevus. Clinically, it is an asymmetric, irregular, multicolored, pigmented lesion that is not clearly distinguishable from melanoma or dysplastic (Clark's) nevus. Dermoscopic features have not been described yet, and one could speculate that they are similar to those of Clark's nevi because the histopathologic architecture of Spark's nevus is similar to that of a Clark's nevus, resembling Spitz's nevi in the epithelioid morphology of melanocytes...
April 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29785239/blaschko-linear-congenital-mixed-hemato-lymphangio-keratoma-serpiginosum-naeviforme-a-new-hybrid-entity-or-various-morphological-reflections-of-the-two-different-vascular-abnormalities
#5
Betul Tas, Aysel Çağlar, Serdar Altinay
We present the case of a 15-year-old girl who presented with an unusual grouping of lesions on her upper left leg. The lesions had been present since birth. The patient had five different types of lesions: 1) transparent grouped or scattered yellowish vesicles; 2) keratotic-surfaced, grouped dark-yellowish papules; 3) bright-red grouped papules; 4) keratotic-surfaced grouped dark-red papules; and 5) patchy, punctate, and erythematous red macules. All of the lesions were intertwined along the lines of Blaschko and were in the form of irregular serpiginous plaques...
May 2018: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/29785209/acute-suppurative-thyroiditis-caused-by-thyroid-papillary-carcinoma-in-the-right-thyroid-lobe-of-a-healthy-woman
#6
Hazuki Otani, Masakazu Notsu, Sayo Koike, Miwa Morita, Masahiro Yamamoto, Mika Yamauchi, Takahumi Fuchiwaki, Ichiro Morikura, Noriaki Aoi, Hideyuki Kawauchi, Teruaki Iwabashi, Asuka Araki, Noriyoshi Ishikawa, Riruke Maruyama, Toshitsugu Sugimoto
Background: The thyroid gland is resistant to microbial infection, because of its organ characteristics such as encapsulation, iodine content, and rich blood supply. Therefore, acute suppurative thyroiditis (AST), as a bacterial infection of the thyroid gland, is rarely seen. AST typically takes places on the left side the neck region in children, because of the coincidence of the left piriform sinus fistula, as a most common route of infection. AST is also usually seen in immunocompromised hosts...
2018: Thyroid Research
https://www.readbyqxmd.com/read/29784934/investigation-on-the-structures-and-magnetic-properties-of-carbon-or-nitrogen-doped-cobalt-ferrite-nanoparticles
#7
Derang Cao, Lining Pan, Jianan Li, Xiaohong Cheng, Zhong Zhao, Jie Xu, Qiang Li, Xia Wang, Shandong Li, Jianbo Wang, Qingfang Liu
Carbon or nitrogen doped cobalt ferrite nanoparticles were synthesized in the air by a facile calcination process. X-ray diffraction, mapping, X-ray photoelectron spectroscopy, and mössbauer spectra results indicate that the nonmetal elements as the interstitial one are doped into cobalt ferrite nanoparticles. The morphologies of doped cobalt ferrite nanoparticles change from near-spherical to irregular cubelike shapes gradually with the increased carbon or nitrogen concentration, and their particles sizes also increase more than 200 nm...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29783802/-clinicopathologic-and-molecular-features-of-cribriform-morular-variant-of-papillary-thyroid-carcinoma
#8
X J Cui, H O Zhao, P Su, J Chen, R Y Zhang, Y Pan, X M Ouyang, J Liu, J Q Zhang, Y Yang, R Yang, L Ding, Z Y Liu
Objective: To investigate the clinicopathologic and molecular features of the rare cribriform morular variant of papillary thyroid carcinoma (CMV-PTC). Methods: The clinicopathologic data of 10 patients with CMV-PTC were retrospectively reviewed. Immunohistochemical (IHC) staining was done using LSAB method. DNA sequencing for APC were applied using Sanger method. BRAF V600E mutation was examined using ARMS method. The cytological, morphological, IHC and molecular features were analyzed. Results: All patients were female at an average age of 27 years old...
May 8, 2018: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29783704/the-application-of-globular-water-atomized-iron-powders-for-additive-manufacturing-by-a-lens-technique
#9
Tomasz Durejko, Justyna Aniszewska, Michał Ziętala, Anna Antolak-Dudka, Tomasz Czujko, Robert A Varin, Vlad Paserin
The water-atomized ATOMET 28, 1001, 4701, and 4801 powders, manufactured by Rio Tinto Metal Powders, were used for additive manufacturing by a laser engineered net shaping (LENS) technique. Their overall morphology was globular and rounded with a size distribution from about 20 to 200 µm. Only the ATOMET 28 powder was characterized by a strong inhomogeneity of particle size and irregular polyhedral shape of powder particles with sharp edges. The powders were pre-sieved to a size distribution from 40 to 150 µm before LENS processing...
May 18, 2018: Materials
https://www.readbyqxmd.com/read/29782580/magic-circle
#10
Jan Koenderink, Andrea van Doorn, Johan Wagemans
Full-horizon cylindrical projections of the optic array are in common use. One wonders whether the public actually profits from such pictorial information, since the space behind one's back does not exist in visual awareness. In an experiment, a test image included six persons located at the corners of an irregular hexagon centred at the camera. Two persons faced the camera, two turned their back to the camera and two others faced a direction at right angles to the camera. The distances to the camera were unequal and varied from 1 to 2 m...
May 2018: I-Perception
https://www.readbyqxmd.com/read/29782416/acellular-flowable-matrix-in-the-treatment-of-tunneled-or-cavity-ulcers-in-diabetic-feet-a-preliminary-report
#11
Ferdinando Campitiello, Manfredi Mancone, Angela Della Corte, Raffaella Guerniero, Silvestro Canonico
OBJECTIVE: The authors aimed to explore the feasibility and safety of an advanced, acellular, flowable wound matrix (FWM) in patients with diabetes-related cavity or tunnel lesions involving deep structures. METHODS: Patients with diabetic foot ulcers were hospitalized at the General and Geriatric Surgery Unit of the University of Campania in Naples, Italy, between March 2015 and December 2015. Twenty-three patients with tunneled or cavity ulcers were treated. The lesions were filled with the FWM...
June 2018: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/29782304/role-of-in-vivo-reflectance-confocal-microscopy-in-the-analysis-of-melanocytic-lesions
#12
Elena-Daniela Serban, Francesca Farnetani, Giovanni Pellacani, Maria Magdalena Constantin
Worldwide melanoma incidence and mortality are increasing (1). Despite the ongoing research, advanced melanoma is still incurable; therefore, the most appropriate solution seems to be early detection combined with complete surgical excision (2). Since the diagnostic protocol of suspicious lesions includes a complete excision with safety margins (2), the problem of unnecessary scarring is significant. The real challenge in this case is to have a properly formulated diagnosis before acquiring a biopsy. Currently available non-invasive techniques are coherence tomography, digital dermoscopy, and reflectance confocal microscopy...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29782153/temperature-responsive-fluorescent-organoplatinum-ii-metallacycles
#13
Jian-Hong Tang, Yue Sun, Zhong-Liang Gong, Zhong-Yu Li, Zhixuan Zhou, Heng Wang, Xiaopeng Li, Manik Lal Saha, Yu-Wu Zhong, Peter J Stang
The synthesis, characterization, and temperature-responsive properties of two fluorescent organoplatinum(II) metallacycles are reported. Metallacycles M1 and M2 were prepared via the coordination-driven self-assembly of a 120o triarylamine ligand L1 and a 120o diplatinum(II) acceptor Pt-1 or 180o diplatinum(II) acceptor Pt-2, respectively. M1 and M2 are hexagonal metallacycles, comprising of three or six freely rotating anthracene pendants on their periphery, respectively. In response to the temperature variation between 20 and 60 oC, the ligand displays irregular emission changes, whereas both metallacycles show reversible absorption and emission spectral changes in THF...
May 21, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29782142/projection-based-3d-printing-of-cell-patterning-scaffolds-with-multi-scale-channels
#14
Dai Xue, Yancheng Wang, Jiaxin Zhang, Deqing Mei, Yue Wang, Shaochen Chen
To fully actualize artificial, cell-laden biological models in tissue engineering, such as 3D organoids and organs-on-a-chip systems, cells need to be patterned such that they can precisely mimic natural microenvironments in vitro. Despite increasing interest in this area, patterning cells at multiscales (~10 μm - 10 mm) remains a significant challenge in bioengineering. Here we report a projection-based 3D printing system that achieves rapid and high-resolution fabrication of hydrogel scaffolds featuring intricate channels for multi-scale cell patterning...
May 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29781675/axial-sesamoiditis-in-the-horse-a-review
#15
Christelle Le Roux, Ann Carstens
Axial sesamoiditis or osteitis of the proximal sesamoid bones (PSBs) in the horse is described as a rare condition. The cause remains unknown and speculative, with vascular, infectious, and traumatic aetiologies implicated. It is specifically associated with injury of the palmar or plantar ligament (PL), also known as the intersesamoidean ligament. Imaging findings are generally rewarding and radiological changes are typical, if not pathognomonic, for the condition. Lesions consist of bone lysis at the apical to mid-body axial margins of the PSBs, with variable degrees of joint effusion...
March 29, 2018: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/29781669/trajectories-of-irregular-word-reading-ability-as-a-proxy-for-premorbid-intelligence-in-alzheimer-s-disease-mild-cognitive-impairment-and-healthy-aging-a-longitudinal-study
#16
Michael Weinborn, Romola S Bucks, Hamid R Sohrabi, Stephanie R Rainey-Smith, Belinda M Brown, Samantha L Gardener, Aleksandra Gozt, Daniel Christensen, Greg Savage, Simon M Laws, Kevin Taddei, Paul Maruff, Joanne S Robertson, Kathryn A Ellis, David Ames, Colin L Masters, Christopher C Rowe, Ralph N Martins
The ability to read irregularly spelled words is commonly used to estimate premorbid intelligence, as this ability has been thought to be resistant to early effects of neurodegenerative disorders. However, studies evaluating decline of this skill in Alzheimer's disease (AD) have produced conflicting results. Irregular word reading was assessed three times over 36 months in a large (N = 995) sample, including healthy control, AD, and Mild Cognitive Impairment (MCI) groups. At baseline, MCI and AD groups read correctly an average of 3...
May 21, 2018: Psychological Assessment
https://www.readbyqxmd.com/read/29781267/highly-regular-uniform-k-3-scf-6-mn-4-phosphors-facile-synthesis-microstructures-photo-luminescence-properties-and-application-in-led-devices
#17
Hong Ming, Shuifu Liu, Lili Liu, Jiaqing Peng, Junxiang Fu, Fu Du, Xinyu Ye
A new generation of red phosphors of complex fluoride matrices activated with Mn4+ , has gained a broad interest in getting high color rendering index (CRI), low correlated color temperature (CCT) of white light-emitting diodes(WLEDs). However, besides their instability towards moisture, the extremely irregular and nonuniform morphologies of these phosphors have limited their practical industry applications. In the present study, a novel type of K3 ScF6 :Mn4+ red phosphor with highly regular, uniform and high color purity was synthesized successfully via a facile two-step co-precipitation method under mild conditions...
May 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29781093/hippocampal-place-cell-encoding-of-sloping-terrain
#18
Blake S Porter, Robert Schmidt, David K Bilkey
Effective navigation relies on knowledge of one's environment. A challenge to effective navigation is accounting for the time and energy costs of routes. Irregular terrain in ecological environments poses a difficult navigational problem as organisms ought to avoid effortful slopes to minimize travel costs. Route planning and navigation have previously been shown to involve hippocampal place cells and their ability to encode and store information about an organism's environment. However, little is known about how place cells may encode the slope of space and associated energy costs as experiments are traditionally carried out in flat, horizontal environments...
May 21, 2018: Hippocampus
https://www.readbyqxmd.com/read/29780931/case-of-progressive-hyperopia-due-to-flattening-of-cornea
#19
Hiromasa Hirai, Shinji Maruoka, Tadanobu Yoshikawa, Nahoko Ogata
Purpose: To report a case that had a progressive decrease in the visual acuity caused by a progressive increase in the hyperopia due to a flattening of the cornea. Observations: A 50-year-old woman complained of decreased vision in both eyes. Her decimal best-corrected visual acuity was 1.2 in the right and 0.5 in the left eyes, and the refractive error (spherical equivalent) was +3.75 diopters (D) for the right eye and +6.5 D for the left eye. Slit-lamp examinations showed clear corneas but Descemet's folds and fine pigmentations and opacities were present beneath the corneal epithelium in both eyes...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780913/cryptococcal-choroiditis-in-advanced-aids-with-clinicopathologic-correlation
#20
Christopher M Aderman, Ian R Gorovoy, Daniel L Chao, Michele M Bloomer, Anthony Obeid, Jay M Stewart
Purpose: To describe a case of disseminated cryptococcal meningitis with multifocal choroiditis and provide optical coherence tomography (OCT) findings correlated with described histopathology in a patient with advanced acquired immunodeficiency syndrome (AIDS). Observations: The patient was a 54-year-old man with AIDS who presented with dyspnea and headache followed by acute vision loss. OCT demonstrated a lesion with a small area of fluid that was limited by a more prominent and irregular external limiting membrane with underlying nodular choroidal thickening, mild RPE disorganization, and hyperreflectivity of the overlying photoreceptor layer...
June 2018: American Journal of Ophthalmology Case Reports
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