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https://www.readbyqxmd.com/read/27910450/first-order-reversal-curves-forc-analysis-of-individual-magnetic-nanostructures-using-micro-hall-magnetometry
#1
Merlin Pohlit, Paul Eibisch, Maryam Akbari, Fabrizio Porrati, Michael Huth, Jens Müller
Alongside the development of artificially created magnetic nanostructures, micro-Hall magnetometry has proven to be a versatile tool to obtain high-resolution hysteresis loop data and access dynamical properties. Here we explore the application of First Order Reversal Curves (FORC)-a technique well-established in the field of paleomagnetism for studying grain-size and interaction effects in magnetic rocks-to individual and dipolar-coupled arrays of magnetic nanostructures using micro-Hall sensors. A proof-of-principle experiment performed on a macroscopic piece of a floppy disk as a reference sample well known in the literature demonstrates that the FORC diagrams obtained by magnetic stray field measurements using home-built magnetometers are in good agreement with magnetization data obtained by a commercial vibrating sample magnetometer...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27878578/the-double-guidewire-approach-for-transcoronary-pacing-in-a%C3%A2-porcine-model
#2
K M Heinroth, S Unverzagt, D Mahnkopf, S Frantz, R Prondzinsky
BACKGROUND: Transcoronary pacing is used for treatment of unheralded bradycardias in the setting of percutaneous coronary interventions (PCI). OBJECTIVES: In the present study we introduced a new concept - the double guidewire approach - for transcoronary pacing in a porcine model. METHODS: Transcoronary pacing was applied in 16 adult pigs under general anaesthesia in an animal catheterization laboratory. A special guidewire with electrical insulation by PTFE coating except for the distal part of the guidewire was positioned in the periphery of a coronary artery serving as the cathode...
November 23, 2016: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/27872024/floppy-glans-syndrome-pathogenesis-and-treatment
#3
REVIEW
Michael Bickell, Neil Manimala, Justin Parker, Brian Steixner, Lucas Wiegand, Rafael Carrion
INTRODUCTION: Floppy glans syndrome (FGS) is a potential complication of penile prosthesis placement in patients with erectile dysfunction. FGS affects a very small proportion of these patients, and it can manifest in a ventral, dorsal, or lateral droop of a hypermobile glans, which can cause affected patients to complain of painful, unsatisfying, or otherwise difficult attempts at sexual intercourse. Incorrect cylinder sizing can even result in extreme conditions such as flail penis or S-shaped deformity...
April 2016: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/27811633/wingtip-flap-for-reconstruction-of-full-thickness-upper-and-lower-eyelid-defects
#4
Ivan Vrcek, Eva Chou, Sean Blaydon, John Shore
PURPOSE: Pentagonal wedge resection is a technique used to address a wide variety of eyelid pathology. This procedure frequently results in excess skin at the apex of the wound, commonly known as a "dog ear." A variety of methods have been described to address the cutaneous redundancy, the most classic of which is the Burow's triangle repair. The authors present a technique to address the anterior lamellar excess that avoids placement of a vertical scar traversing the pretarsal and preseptal portion of the affected eyelid...
November 2, 2016: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27811562/outcomes-of-descemet-stripping-automated-endothelial-keratoplasty-in-toxic-anterior-segment-syndrome-after-phacoemulsification
#5
Manpreet Kaur, Jeewan S Titiyal, Ruchita Falera, Tarun Arora, Namrata Sharma
PURPOSE: To evaluate the visual and anatomical outcomes of Descemet stripping automated endothelial keratoplasty (DSAEK) in patients with toxic anterior segment syndrome (TASS). METHODS: Fourteen eyes of 14 patients who underwent clear corneal DSAEK for endothelial decompensation secondary to TASS after phacoemulsification were included in this prospective study. Intraoperative surgical difficulties were noted. Preoperative and postoperative evaluation of visual acuity, slit-lamp examination, intraocular pressure, central corneal thickness, and endothelial count was performed in all cases...
November 2, 2016: Cornea
https://www.readbyqxmd.com/read/27761703/intraoperative-floppy-iris-syndrome-and-its-association-with-various-concurrent-medications-bulbus-length-patient-age-and-gender
#6
Michael Wahl, Saskia M Tipotsch-Maca, Pia V Vecsei-Marlovits
PURPOSE: To evaluate the association between intraoperative floppy iris syndrome (IFIS) and concurrent medications containing selective alpha1A receptor antagonists as well as nonselective alpha1-adrenergic receptor antagonists, bulbus length, patient age and gender. METHODS: We performed a prospective data acquisition of IFIS occurrence and grading, and retrospective evaluation of concurrent medications, bulbus length, patient age and gender of all patients undergoing cataract surgery over a 6-month period...
October 19, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27740787/neurofilaments-function-as-shock-absorbers-compression-response-arising-from-disordered-proteins
#7
Micha Kornreich, Eti Malka-Gibor, Ben Zuker, Adi Laser-Azogui, Roy Beck
What can cells gain by using disordered, rather than folded, proteins in the architecture of their skeleton? Disordered proteins take multiple coexisting conformations, and often contain segments which act as random-walk-shaped polymers. Using x-ray scattering we measure the compression response of disordered protein hydrogels, which are the main stress-responsive component of neuron cells. We find that at high compression their mechanics are dominated by gaslike steric and ionic repulsions. At low compression, specific attractive interactions dominate...
September 30, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27704483/slackline-training-balancing-over-narrow-nylon-ribbons-and-balance-performance-a-meta-analytical-review
#8
Lars Donath, Ralf Roth, Lukas Zahner, Oliver Faude
BACKGROUND: Adequate static and dynamic balance performance is an important prerequisite during daily and sporting life. Various traditional and innovative balance training concepts have been suggested to improve postural control or neuromuscular fall risk profiles over recent years. Whether slackline training (balancing over narrow nylon ribbons) serves as an appropriate training strategy to improve static and dynamic balance performance is as yet unclear. OBJECTIVE: The aim was to examine the occurrence and magnitude of effects of slackline training compared with an inactive control condition on static and dynamic balance performance parameters in children, adults and seniors...
October 4, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27704220/a-review-of-the-safety-of-clozapine-during-pregnancy-and-lactation
#9
Taylor M Mehta, Ryan J Van Lieshout
Clozapine is an antipsychotic used in the management of treatment-resistant schizophrenia. However, little is known about clozapine use during pregnancy and lactation, or its impact on the mother, foetus, and infant. This review aims to summarize the available literature on the safety of clozapine use during the perinatal period. EMBASE, PsycINFO, and MEDLINE were searched from their inceptions through June 2016. The review encompasses 21 studies that have examined clozapine use during pregnancy and lactation...
October 4, 2016: Archives of Women's Mental Health
https://www.readbyqxmd.com/read/27659790/abdominal-pain-due-to-a-wandering-liver
#10
Antoine Bruneau, Giovanni Battista Levi Sandri, Michel Rayar, Laurent Sulpice, Karim Boudjema
Wandering liver syndrome is an extremely rare congenital disorder. It is mainly diagnosed within the first years of life. Herein we report the case of a 40-year-old woman with hepatoptosis due to the absence of anatomical peritoneal attachments of the liver. Surgical treatment consisted in inserting the floppy right lobe of the liver in a subphrenic retroperitoneal pouch. This original technique provided excellent postoperative result.
September 22, 2016: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/27635626/eye-disorders-associated-with-obstructive-sleep-apnoea
#11
Sophie D West, Chris Turnbull
PURPOSE OF REVIEW: Obstructive sleep apnoea (OSA) is increasing in prevalence due to rising obesity. Public awareness is also growing. Although OSA is a disorder primarily of the upper airway during sleep, its physiological impact on other parts of the body is now well recognized. There is increasing interest in the association of OSA with various eye disorders. Work in this field has been directed predominantly to OSA prevalence and association studies, but some authors have tried to elucidate the effect of OSA therapies on eye diseases, including continuous positive airway pressure, upper airway surgery or bariatric surgery...
November 2016: Current Opinion in Pulmonary Medicine
https://www.readbyqxmd.com/read/27621463/the-role-of-rigidity-in-controlling-material-failure
#12
Michelle M Driscoll, Bryan Gin-Ge Chen, Thomas H Beuman, Stephan Ulrich, Sidney R Nagel, Vincenzo Vitelli
We investigate how material rigidity acts as a key control parameter for the failure of solids under stress. In both experiments and simulations, we demonstrate that material failure can be continuously tuned by varying the underlying rigidity of the material while holding the amount of disorder constant. As the rigidity transition is approached, failure due to the application of uniaxial stress evolves from brittle cracking to system-spanning diffuse breaking. This evolution in failure behavior can be parameterized by the width of the crack...
September 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27570388/congenital-muscular-dystrophy-with-inflammation-diagnostic-considerations
#13
Kaumudi Konkay, Meena Angamuthu Kannan, Lokesh Lingappa, Megha S Uppin, Sundaram Challa
BACKGROUND AND PURPOSE: Muscle biopsy features of congenital muscular dystrophies (CMD) vary from usual dystrophic picture to normal or nonspecific myopathic picture or prominent fibrosis or striking inflammatory infiltrate, which may lead to diagnostic errors. A series of patients of CMD with significant inflammatory infiltrates on muscle biopsy were correlated with laminin α2 deficiency on immunohistochemistry (IHC). MATERIAL AND METHODS: Cryostat sections of muscle biopsies from the patients diagnosed as CMD on clinical and muscle biopsy features from 1996 to 2014 were reviewed with hematoxylin and eosin(H&E), enzyme and immunohistochemistry (IHC) with laminin α2...
July 2016: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/27531288/untoward-events-associated-with-aberrant-fluid-infusion-during-cataract-surgery-laboratory-study-with-corroborative-clinical%C3%A2-observations
#14
Richard S Koplin, David C Ritterband, Jack M Dodick, Eric D Donnenfeld, Mark Schafer
PURPOSE: To determine the relationship between untoward events noted during phacoemulsification surgery associated with aberrant infusion misdirection and their causal relationship to current infusion sleeve design. SETTING: The New York Eye & Ear Infirmary of Mt. Sinai, New York, New York, USA. DESIGN: Retrospective case reports and experimental study. METHODS: Observations of live cataract surgery were documented with high-definition videography using 3 commercial phacoemulsification platforms...
August 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/27521670/intraoperative-floppy-iris-syndrome-associated-with-use-of-antipsychotic-drugs
#15
Masato Matsuo, Ichiya Sano, Yoshifumi Ikeda, Etsuko Fujihara, Masaki Tanito
OBJECTIVE: We report 3 cases of intraoperative floppy-iris syndrome (IFIS) during cataract surgery in patients without a history of selective α1-blocker use but with a long-term history of antipsychotic drug use. We reviewed previously reported cases of antipsychotic drug-associated IFIS cases. DESIGN: Observational case series. RESULTS: In case 1, bilateral IFIS developed in a 39-year-old man with chronic angle-closure glaucoma. He had used several classes of antipsychotic drugs to treat schizophrenia, including the first-generation antipsychotic drugs haloperidol and chlorpromazine, the dopamine system stabilizer aripiprazole, the dopamine serotonin antagonists olanzapine and quetiapine, and the serotonin dopamine antagonists risperidone and blonanserin for 7 years...
August 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/27473881/chest-radiograph-as-diagnostic-clue-in-a-floppy-infant
#16
Isabella Schmeh, André Kidszun, Ekkehart Lausch, Oliver Bartsch, Eva Mildenberger
No abstract text is available yet for this article.
October 2016: Journal of Pediatrics
https://www.readbyqxmd.com/read/27464595/critical-behaviour-in-the-nonlinear-elastic-response-of-hydrogels
#17
M Dennison, M Jaspers, P H J Kouwer, C Storm, A E Rowan, F C MacKintosh
In this paper we study the elastic response of synthetic hydrogels to an applied shear stress. The hydrogels studied here have previously been shown to mimic the behaviour of biopolymer networks when they are sufficiently far above the gel point. We show that near the gel point they exhibit an elastic response that is consistent with the predicted critical behaviour of networks near or below the isostatic point of marginal stability. This point separates rigid and floppy states, distinguished by the presence or absence of finite linear elastic moduli...
August 17, 2016: Soft Matter
https://www.readbyqxmd.com/read/27455101/ophthalmic-diseases-in-patients-with-obstructive-sleep-apnea
#18
Leonid Skorin, Rachel Knutson
Symptomatic obstructive sleep apnea (OSA) affects 2% of women and 4% of men, but the prevalence of asymptomatic OSA is significantly higher. Several ophthalmic conditions are associated with OSA, including floppy eyelid syndrome, glaucoma, nonarteritic anterior ischemic optic neuropathy, papilledema, keratoconus, and central serous chorioretinopathy. The purpose of this review is to provide primary care physicians with a general knowledge of the signs, symptoms, and management of the ophthalmic diseases associated with OSA...
August 1, 2016: Journal of the American Osteopathic Association
https://www.readbyqxmd.com/read/27453216/assessment-of-urologists-knowledge-of-intraoperative-floppy-iris-syndrome
#19
Youning Zhang, Neda Shamie, Siamak Daneshmand
OBJECTIVES: To assess urologists' awareness of intraoperative floppy iris syndrome. MATERIALS AND METHODS: A questionnaire composed of 21 questions was emailed to all of the Urology residency programs in the U.S. and all members of the Western section of the American Urological Association. Responses were collected and analyzed using statistical software. RESULTS: A total of 175 responses were collected from residents, fellows, and attending physicians from a wide range of geographic locations, subspecialties, and practice settings...
July 21, 2016: Urology
https://www.readbyqxmd.com/read/27445020/floppy-mitral-valve-fmv-mitral-valve-prolapse-mvp-mitral-valvular-regurgitation-and-fmv-mvp-syndrome
#20
REVIEW
Konstantinos Dean Boudoulas, Antonios A Pitsis, Harisios Boudoulas
Mitral valve prolapse (MVP) results from the systolic movement of a portion(s) or segment(s) of the mitral valve leaflet(s) into the left atrium during left ventricular (LV) systole. It should be emphasised that MVP alone, as defined by imaging techniques, may comprise a non-specific finding because it also depends on the LV volume, myocardial contractility and other LV hemodynamics. Thus, a floppy mitral valve (FMV) should be the basis for the diagnosis of MVP. Two types of symptoms may be defined in these patients...
March 2016: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
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