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Sabine Schmidt, Sophie Hubich, Jan Markus Vetter, Christopher Wirbelauer
BACKGROUND: Torsional mode phacoemulsification results in more effective fragmentation of the nucleus due to a different movement of the phacotip. In this clinical study, we investigated the influence of a modified tip design and active fluidics on the efficacy of phacoemulsification and safety for the corneal endothelium. MATERIAL AND METHODS: We conducted a prospective randomized 2 : 1 study in which 40 patients were operated on with the mini-flared Kelman Tip using the Infiniti ® System (group 1), and 20 patients were operated on with the Intrepid ® Balanced Tip and the Centurion ® System...
February 16, 2018: Klinische Monatsblätter Für Augenheilkunde
Chih-Wen Yang, Kwan-Tai Leung, Ren-Feng Ding, Hsien-Chen Ko, Yi-Hsien Lu, Chung-Kai Fang, Ing-Shouh Hwang
Atomic force microscopy is used to conduct single-asperity friction measurements at a water-graphite interface. Local mapping of the frictional force, which is based on the degree of the cantilever twisting, shows nearly friction-free when a tip scans over a nanobubble. Surprisingly, apart from being gapless, the associated friction loop exhibits a tilt in the cantilever twisting versus the tip's lateral displacement with the slope depending on the loading force. The sign of the slope reverses at around zero loading force...
February 15, 2018: Scientific Reports
L El Sayed, F Teboul, G Asmar, J-N Goubier
Neuropathies of digital nerves are an infrequent phenomenon and their causes are most often mechanical. A rare cause of acute neuropathy is hourglass-like fascicular constriction of a nerve due to torsion. Although several cases of hourglass-like constriction have been described in the literature, none to our knowledge involved digital nerves. In this report, we present the first case of hourglass-like constriction of a digital nerve.
February 12, 2018: Hand Surgery and Rehabilitation
Se-Yeon Lee, Taek-Kyun Jung, Hyeon-Woo Son, Sang-Wook Kim, Kwang-Tae Son, Ho-Joon Choi, Sang-Ho Oh, Ji-Woon Lee, Soong-Keun Hyun
The hot deformation behavior of hot-extruded AA7175 was investigated with flow curves and processing maps through hot torsion tests. The flow curves and the deformed microstructures revealed that dynamic recrystallization (DRX) occurred in the hot-extruded AA7175 during hot working. The failure strain was highest at medium temperature. This was mainly influenced by the dynamic precipitation of fine rod-shaped MgZn2. The processing map determined the optimal deformation condition for the alloy during hot working...
March 1, 2018: Journal of Nanoscience and Nanotechnology
Guillermo Panisse, María Celina Digiani
A new species of Heligmonellidae (Trichostrongylina, Heligmosomoidea), Stilestrongylus kaaguyporai n. sp. is described from the small intestine of Euryoryzomys russatus (Rodentia, Cricetidae, Sigmodontinae) from the Argentine Atlantic Forest, in the Misiones province. The new species was found at Campo Anexo Manuel Belgrano, Reserva de Vida Silvestre Urugua-í and Parque Provincial Urugua-í, with a prevalence of 73% in 15 hosts examined. Stilestrongylus includes 24 Neotropical species, all parasitic in rodents, mostly Sigmodontinae...
February 14, 2018: Parasitology Research
Michele Romano, Matteo Mastrantonio
Background: One of the reasons that make scoliosis a disease that scares so much the parents is its specific characteristic of being difficult to detect on its onset.The aim of this paper is to check the possible usefulness of a simple tool (the torsion bottle) that has been developed with the aim to offer an instrument for home use by parents but also for screening purposes in the low-income countries. Methods: Study design: retrospective analysis to evaluate intra-operator reliability of the tools and inter-operator repeatability using the torsion bottle...
2018: Scoliosis and Spinal Disorders
Ashley J Lockwood, Virginia B Sinnott-Stutzman, Pamela J Mouser, Steven L Tsai
This case highlights the management and diagnostic evaluation of a dog with two individually rare conditions (lung lobe torsion and vena cava aneurysm) that ultimately resulted in fatal pulmonary thromboembolism.
February 2018: Clinical Case Reports
Taylor B Lawson, Devon E Scott-Drechsel, Venkat Keshav Chivukula, Sandra Rugonyi, Kent L Thornburg, Monica T Hinds
Congenital heart defects (CHDs) represent the most common form of human birth defects; approximately one-third of heart defects involve malformations of the outflow tract (OFT). Maternal diabetes increases the risk of CHD by 3-5 fold. During heart organogenesis, little is known about the effects of hyperglycemia on hemodynamics, which are critical to normal heart development. Heart development prior to septation in the chick embryo was studied under hyperglycemic conditions. Sustained hyperglycemic conditions were induced, raising the average plasma glucose concentration from 70 mg/dL to 180 mg/dL, akin to the fasting plasma glucose of a patient with diabetes...
February 12, 2018: Journal of Cardiovascular Development and Disease
Gui-Long Liu, Shi-Hong Huang, Che-Si Shi, Bin Zeng, Ke-Shi Zhang, Xian-Ci Zhong
Using copper thin-walled tubular specimens, the subsequent yield surfaces under pre-tension, pre-torsion and pre-combined tension-torsion are measured, where the single-sample and multi-sample methods are applied respectively to determine the yield stresses at specified offset strain. The rule and characteristics of the evolution of the subsequent yield surface are investigated. Under the conditions of different pre-strains, the influence of test point number, test sequence and specified offset strain on the measurement of subsequent yield surface and the concave phenomenon for measured yield surface are studied...
February 10, 2018: Materials
Michael J H Clarke, Samuel Crocker, David G Bartle, John Apsey
A male neonate born after uncomplicated vaginal delivery at 36 weeks' gestation was noted to have large and firm testicles bilaterally on routine examination. A testicular ultrasound scan was subsequently organised that showed detailed appearances consistent with bilateral testicular torsion. This was thought to have taken place antenatally and as such was unfortunately not suitable for intervention. The patient was therefore managed conservatively with the testicles left to involute naturally. He was started on testosterone replacement therapy after follow-up when gonadotrophin levels were found to be raised and testosterone low (suggesting absent testicular function) and will be closely followed up regarding his future development which is normal to this point...
February 7, 2018: BMJ Case Reports
Rajib Ghosh
The effect of acceptor strength variation on ultrafast twisting relaxation dynamics was investigated by comparing the ultrafast relaxation dynamics in a series of dimethylaminochalcone (DMAC) derivatives. Employing femtosecond resolved transient absorption and fluorescence experiments, the twisted intramolecular charge transfer (TICT) relaxation rate is shown to vary from 2.0 picoseconds in a weak electron accepting system to 420 femtoseconds in a strong electron accepting system. The strength of the acceptor, empirically expressed as Hammett's constant, is shown to exhibit a linear free energy relationship (LFER) with the twisting rate...
February 13, 2018: Physical Chemistry Chemical Physics: PCCP
Tameto Naoi, Mitsuya Morita, Tadataka Kawakami, Shigeru Fujimoto
A 67-year-old man with hypertension and type 2 diabetes mellitus was admitted to our hospital because of left hearing loss and vertical diplopia. A neurological examination showed ocular torsion, skew deviation, and sensorineural hearing loss in the left ear. Brainstem and cerebellar neurological signs were not observed. Left middle cerebellar peduncle infarction was evident on magnetic resonance imaging. He was treated with antiplatelet, however, the infarct progressed after this administration. Ocular tilt reaction (OTR) involves the triad of ocular torsion, skew deviation, and head tilt...
February 9, 2018: Internal Medicine
Andres Rodriguez Zorro, Jairo Hernando Vivas Diaz
Acute appendicitis is one of the most common surgical emergencies in paediatrics. However, acute appendicitis in early infancy is an uncommon condition. Furthermore, strangulation of the small intestine through appendicular knotting is described as very unusual in the literature and is generally not well-diagnosed in the clinical context. This article reports the case of a 23-month-old girl who entered the emergency department with a three-day history of abdominal symptoms and who died in less than 24 hours without receiving surgical intervention...
January 1, 2018: Medicine, Science, and the Law
Xiao Shan, David C Clary
The rate constants of the two branches of H-abstractions from CH3OH by the H-atom and the corresponding reactions in the reverse direction are calculated using the one-dimensional semiclassical transition state theory (1D SCTST). In this method, only the reaction mode vibration of the transition state (TS) is treated anharmonically, while the remaining internal degrees of freedom are treated as they would have been in a standard TS theory calculation. A total of eight ab initio single-point energy calculations are performed in addition to the computational cost of a standard TS theory calculation...
March 13, 2018: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
Semih E Bezci, Ananth Eleswarapu, Eric O Klineberg, Grace D O'Connell
Stresses applied to the spinal column are distributed between the intervertebral disc and facet joints. Structural and compositional changes alter stress distributions within the disc and between the disc and facet joints. These changes influence the mechanical properties of the disc joint, including its stiffness, range of motion, and energy absorption under quasi-static and dynamic loads. There have been few studies evaluating the role of facet joints in torsion. Furthermore, the relationship between biochemical composition and torsion mechanics is not well understood...
February 12, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Vadim M Uritsky, Merrill A Roberts, C Richard DeVore, Judith T Karpen
Extreme-ultraviolet and X-ray jets occur frequently in magnetically open coronal holes on the Sun, especially at high solar latitudes. Some of these jets are observed by white-light coronagraphs as they propagate through the outer corona toward the inner heliosphere, and it has been proposed that they give rise to microstreams and torsional Alfvén waves detected in situ in the solar wind. To predict and understand the signatures of coronal-hole jets, we have performed a detailed statistical analysis of such a jet simulated with an adaptively refined magnetohydrodynamics model...
March 10, 2017: Astrophysical Journal
Kazuki Iio, Osamu Nomura, Akiko Kinumaki, Yujiro Aoki, Hiroyuki Satoh, Hiroshi Sakakibara, Hiroshi Hataya
No abstract text is available yet for this article.
February 8, 2018: Journal of Pediatrics
F Longo, T Nicetto, T Banzato, G Savio, M Drigo, R Meneghello, G Concheri, M Isola
The aim of this ex vivo study was to test a novel three-dimensional (3D) automated computer-aided design (CAD) method (aCAD) for the computation of femoral angles in dogs from 3D reconstructions of computed tomography (CT) images. The repeatability and reproducibility of three manual radiography, manual CT reconstructions and the aCAD method for the measurement of three femoral angles were evaluated: (1) anatomical lateral distal femoral angle (aLDFA); (2) femoral neck angle (FNA); and (3) femoral torsion angle (FTA)...
February 2018: Veterinary Journal
Ioannis Chatzipapas, Nikolaos Kathopoulis, Athanasios Protopapas, Dimitrios Loutradis
Laparoscopy has gradually expanded its use in gynecologic surgery over the last three decades. In this report, a new laparoscopic setup is presented using a mobile smartphone that allows for a low-cost, portable laparoscopic viewing system. The setup was created with the coupling of a rigid 0 degrees, 10-mm diameter laparoscope via a commercially available adaptor with a smartphone. The light source used was also a portable and rechargeable light-emitting diode (LED) cold light source. We completed 17 diagnostic laparoscopies for different pathologies such as ectopic pregnancy, ovarian torsion, luteal hemorrhagic cyst, and disseminated ovarian cancer...
February 6, 2018: Journal of Minimally Invasive Gynecology
Fateme Alipour, Fateme Veisi Hampa, Elham Ashrafi, Shima Dehghani
PURPOSE: To determine predictive factors for intra-operative cyclotorsion in photorefractive keratectomy (PRK). METHODS: A retrospective statistical analysis of medical records pertaining to 3,996 eyes undergoing PRK was conducted. Outcome measures of this study were the likely existence of statistically significant relations between diverse and potentially influential factors and the occurrence of intraoperative cyclotorsion. RESULTS: A total of 96% of examined medical records indicated some degree of cyclotorsion with the absolute mean intraoperative value of 1...
February 1, 2018: Journal of Refractive Surgery
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