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https://www.readbyqxmd.com/read/28229355/femoral-shaft-osteotomy-for-obligate-outward-rotation-due-to-scfe
#1
Peter M Stevens, Lucas Anderson, Bruce A MacWilliams
Slipped capital femoral epiphysis (SCFE) is an adolescent disease that leads to retroversion of the femoral neck and shaft, relative to the head. Observing that patients with SCFE must walk with an outward foot progression angle and externally rotate the leg in order to flex the hip, we have been performing a femoral shaft rotational osteotomy wherein we rotate the lower femur 45° inward, relative to the upper femur. By correcting retroversion, our goal is to improve functional hip and knee motion, thereby mitigating the effects of SCFE impingement...
February 22, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28226348/-the-key-points-of-prevention-for-special-surgical-complications-after-radical-operation-of-gastric-cancer
#2
Hao Xu, Weizhi Wang, Panyuan Li, Diancai Zhang, Li Yang, Zekuan Xu
Incidence of gastric cancer is high in China and standard radical operation is currently the main treatment for gastric cancer. Postoperative complications, especially some special complications, can directly affect the prognosis of patients, even result in the increase of mortality. But the incidences of these special complications are low, so these complications are often misdiagnosed and delayed in treatment owing to insufficient recognition of medical staff. These special complications include (1) Peterson hernia: It is an abdominal hernia developed in the space between Roux loop and transverse colon mesentery after Roux-Y reconstruction of digestive tract...
February 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28222504/bimanual-gesture-imitation-in-alzheimer-s-disease
#3
G Nter Sanin, Thomas Benke
BACKGROUND/OBJECTIVE: Unimanual gesture production or imitation has often been studied in Alzheimer's disease (AD) during apraxia testing. In the present study, it was hypothesized that bimanual motor tasks may be a sensitive method to detect impairments of motor cognition in AD due to increased demands on the cognitive system. METHODS: We investigated bimanual, meaningless gesture imitation in 45 AD outpatients, 38 subjects with mild cognitive impairment (MCI), and 50 normal controls (NC) attending a memory clinic...
February 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28202370/to-evaluate-the-role-of-platelet-rich-plasma-in-healing-of-acute-diaphyseal-fractures-of-the-femur
#4
Roop Singh, Rajesh Rohilla, Jeetesh Gawande, Paramjit Kumar Sehgal
PURPOSE: New research is focusing on the use of autologous growth factors to increase the effect of bone fracture healing while decreasing the amount of healing time for the patient. Platelets have been demonstrated to be the natural storage vessel for several growth factors and cytokines that promote blood coagulation, tissue repair, and the process of bone mineralization. The present study aims to evaluate the role of platelet-rich plasma (PRP) in healing of acute femoral shaft fractures radiologically...
January 20, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28198793/proximity-and-risks-of-the-anterior-neurovascular-and-tendinous-anatomy-of-the-distal-leg-relative-to-anteriorly-applied-distal-locking-screws-for-tibia-nailing-a-plea-for-open-insertion
#5
Phillip M Mitchell, Cory A Collinge, Eric Barcak, Edward Perez, Kostas Triantafillou
PURPOSE: To determine the proximity and potential risks to distal leg anatomy from anterior to posteriorly (A-P) applied distal tibia locking screws for tibial nailing. DESIGN: Retrospective. SETTING: ACS level I trauma center. PATIENTS/PARTICIPANTS: Twenty consecutive adult patients undergoing computed tomograms with intravenous contrast (CTAs) on uninjured legs. MAIN OUTCOME MEASUREMENTS: Simulated 5 mm distal interlocking screws placed in the A-P axis of an ideally placed tibial nail at 10 mm increments from the tibial plafond (10 to 40mm) were studied in relation to the distal leg's anterior anatomy...
February 14, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28193138/removal-of-interlocking-intramedullary-nail-for-relieve-of-knee-pain-after-tibial-fracture-repair
#6
Shaodong Zhang, Xiaotao Wu, Lei Liu, Chen Wang
OBJECTIVE: To investigate the effects of intramedullary nail removal after tibial fracture repair. METHODS: Sixty patients at our hospital were enrolled in a prospective study and divided into moderate/severe knee pain (visual analog scale (VAS) ≥ 4) and mild/no knee pain (VAS < 4) groups after interlocking intramedullary nailing. Variables studied included the distance from the tip of the nail to the tibial plateau and the front of the tibia on a normalized lateral X-ray, the VAS score of knee and ankle pain, the range of motion of the knee and ankle, and Johner-Wruhs criteria before, 6 weeks after operation, and at the last follow-up...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28186871/augmentation-of-proximal-femoral-nail-in-unstable-trochanteric-fractures
#7
Wasudeo M Gadegone, Bhaskaran Shivashankar, Vijayanad Lokhande, Yogesh Salphale
INTRODUCTION: Biomechanically proximal femoral nail (PFN) is a better choice of implant, still it is associated with screw breakage, cut out of screw through femoral head, Z effect, reverse Z effect, and lateral migration of screws. The purpose of this study is to evaluate the results of augmented PFN in terms of prevention of postoperative complications and failure rates in unstable trochanteric fractures. MATERIAL AND METHODS: We carried out a prospective study of 82 cases with unstable trochanteric femoral fractures from April 2010 to December 2015...
2017: SICOT-J
https://www.readbyqxmd.com/read/28184249/atlantoaxial-rotatory-fixation-as-a-rare-complication-from-head-positioning-in-otologic-surgery-report-of-two-cases-in-young-children
#8
Hiroshi Sakaida, Koji Akeda, Akihiro Sudo, Kazuhiko Takeuchi
BACKGROUND: Atlantoaxial rotatory fixation is a condition in which the first and second vertebrae of the cervical spine become interlocked in a rotated position. This condition can result in serious consequences and thus have a significant impact on patients, especially when diagnosis and treatment are delayed. Some cases of atlantoaxial rotatory fixation have been described in association with otologic surgery or plastic surgery involving the ear. We present the cases of two pediatric patients who developed atlantoaxial rotatory fixation following otologic surgery and we review the relevant literature...
2017: Patient Safety in Surgery
https://www.readbyqxmd.com/read/28177931/two-component-spin-coated-ag-cnt-composite-films-based-on-a-silver-heterogeneous-nucleation-mechanism-adhesion-enhanced-by-mechanical-interlocking-and-chemical-grafting
#9
Yang Zhang, Zhixin Kang, Takeshi Bessho
In this paper, a new method for the synthesis of silver carbon nanotube (Ag/CNT) composite films as conductive connection units for flexible electronic devices is presented. This method is about a two-component solution process by spin coating with an after-treatment annealing process. In this method, multi-walled carbon nanotubes (MWCNTs) act as the core of silver heterogeneous nucleation, which can be observed and analyzed by a field-emission scanning electron microscope. With the effects of mechanical interlocking, chemical grafting, and annealing, the interfacial adhesive strength between films and PET sheets was enhanced to 12 N cm(-1)...
March 10, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28176770/metal-centred-azaphosphatriptycene-gear-with-a-photo-and-thermally-driven-mechanical-switching-function-based-on-coordination-isomerism
#10
Hitoshi Ube, Yoshihiro Yasuda, Hiroyasu Sato, Mitsuhiko Shionoya
Metal ions can serve as a centre of molecular motions due to their coordination geometry, reversible bonding nature and external stimuli responsiveness. Such essential features of metal ions have been utilized for metal-mediated molecular machines with the ability to motion switch via metallation/demetallation or coordination number variation at the metal centre; however, motion switching based on the change in coordination geometry remain largely unexplored. Herein, we report a Pt(II)-centred molecular gear that demonstrates control of rotor engagement and disengagement based on photo- and thermally driven cis-trans isomerization at the Pt(II) centre...
February 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28176597/the-risk-of-iatrogenic-injury-to-anterior-tibial-artery-variations-during-tibial-nail-distal-interlocking
#11
Nathan J Fanter, Sandra E Inouye, Christopher W Beiser
INTRODUCTION: Tibial intramedullary nailing remains a common tibial fracture fixation method. Tibial nailing indications continue to expand. Neurovascular complications from tibial nailing have been described; however, the proximity of distal tibial locking bolts to the anterior tibial artery (ATA) variants has not. MATERIALS AND METHODS: 52 cadaveric legs were dissected identifying three common ATA variants. Each ATA variant received an intraluminal wire to facilitate fluoroscopic identification...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28171813/effect-of-honeybee-stinger-and-its-microstructured-barbs-on-insertion-and-pull-force
#12
Jintian Ling, Zhenhua Song, Jiarui Wang, Keyun Chen, Jiyu Li, Shujia Xu, Lei Ren, Zhipeng Chen, Dianwen Jin, Lelun Jiang
Worker honeybee is well-known for its stinger with microscopic backward-facing barbs for self-defense. The natural geometry of the stinger enables painless penetration and adhesion in the human skin to deliver poison. In this study, Apis cerana worker honeybee stinger and acupuncture microneedle (as a barbless stinger) were characterized by Scanning Electron Microscope (SEM). The insertion and pull process of honeybee stinger into rabbit skin was performed by a self-developed mechanical loading equipment in comparison with acupuncture needle...
January 25, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28170008/metal-organic-frameworks-utilising-an-interlocked-hexadentate-linker-containing-a-tetra-carboxylate-axle-and-a-bis-pyridine-wheel
#13
Ghazale Gholami, Giorgio Baggi, Kelong Zhu, Stephen J Loeb
A [2]rotaxane linker was synthesized which combines an H-shaped axle containing four 3-carboxyphenyl groups and a macrocyclic wheel with two 4-pyridyl groups. Metal-organic framework materials were prepared with Cu(II) and Zn(II) ions X-ray structures show that the materials contain unique frameworks that are threaded solely due to the interpenetrated nature of the linker.
February 7, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28160507/strong-and-selective-halide-anion-binding-by-neutral-halogen-bonding-2-rotaxanes-in-wet-organic-solvents
#14
Jason Y C Lim, Thanthapatra Bunchuay, Paul D Beer
The design and construction of neutral interlocked host molecules for anion recognition are rare. Using an active-metal template approach, the preparation of a family of neutral halogen bonding rotaxanes containing two, three and four iodotriazole groups integrated into the macrocycle and axle components is achieved. In spite of the interlocked hosts' neutrality, such rotaxane systems are capable of binding halide anions strongly and selectively in wet organic solvent mixtures. Importantly, halide binding strength and selectivity can be modulated by varying the number and position of the halogen bond-donor iodotriazole groups within the interlocked cavity; the rotaxane containing the largest number of halogen bond donor groups exhibits the highest halide anion binding affinities...
February 4, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28157238/resealable-optically-accessible-pdms-free-fluidic-platform-for-ex-vivo-interrogation-of-pancreatic-islets
#15
Giovanni Lenguito, Deborah Chaimov, Jonathan R Weitz, Rayner Rodriguez-Diaz, Siddarth A K Rawal, Alejandro Tamayo-Garcia, Alejandro Caicedo, Cherie L Stabler, Peter Buchwald, Ashutosh Agarwal
We report the design and fabrication of a robust fluidic platform built out of inert plastic materials and micromachined features that promote optimized convective fluid transport. The platform is tested for perfusion interrogation of rodent and human pancreatic islets, dynamic secretion of hormones, concomitant live-cell imaging, and optogenetic stimulation of genetically engineered islets. A coupled quantitative fluid dynamics computational model of glucose stimulated insulin secretion and fluid dynamics was first utilized to design device geometries that are optimal for complete perfusion of three-dimensional islets, effective collection of secreted insulin, and minimization of system volumes and associated delays...
February 3, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28153482/climbing-upstream-multi-scale-structural-characterization-and-underwater-adhesion-of-the-pulin-river-loach-sinogastromyzon-puliensis
#16
Yung-Chieh Chuang, Haw-Kai Chang, Guan-Lin Liu, Po-Yu Chen
Hillstream fishes live in the current with high flow velocity and strong water impact. To survive in such environments, they evolved various adhesive apparatus and attachment mechanisms. In this study, we investigated the Pulin river loach (Sinogatromyzon puliensis) known for its ability to climb vertically against rapid torrent. The whole body forms a suction system, consisting of lips, overlapped pectoral and fused pelvic fins. The hierarchical structure of lips and fins was characterized by Scanning Electron Microscopy...
January 23, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28153480/radiographic-predictors-of-symptomatic-screw-removal-after-retrograde-femoral-nail-insertion
#17
Max Hamaker, Nathan N O'Hara, W Andrew Eglseder, Marcus F Sciadini, Jason W Nascone, Robert V O'Toole
INTRODUCTION: Removal of symptomatic implants is a common procedure performed by orthopaedic trauma surgeons. No guidance is available regarding which factors contribute to the likelihood of an implant becoming symptomatic. Our objective was to determine whether radiographic parameters associated with distal interlocks in retrograde femoral nails are associated with the rate of symptomatic screw removal. PATIENTS AND METHODS: We conducted a retrospective review at a Level I trauma center...
January 6, 2017: Injury
https://www.readbyqxmd.com/read/28141833/anthropogenically-driven-environmental-changes-shift-the-ecological-dynamics-of-hemorrhagic-fever-with-renal-syndrome
#18
Huaiyu Tian, Pengbo Yu, Ottar N Bjørnstad, Bernard Cazelles, Jing Yang, Hua Tan, Shanqian Huang, Yujun Cui, Lu Dong, Chaofeng Ma, Changan Ma, Sen Zhou, Marko Laine, Xiaoxu Wu, Yanyun Zhang, Jingjun Wang, Ruifu Yang, Nils Chr Stenseth, Bing Xu
Zoonoses are increasingly recognized as an important burden on global public health in the 21st century. High-resolution, long-term field studies are critical for assessing both the baseline and future risk scenarios in a world of rapid changes. We have used a three-decade-long field study on hantavirus, a rodent-borne zoonotic pathogen distributed worldwide, coupled with epidemiological data from an endemic area of China, and show that the shift in the ecological dynamics of Hantaan virus was closely linked to environmental fluctuations at the human-wildlife interface...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28140582/chalcogen-bonding-macrocycles-and-2-rotaxanes-for-anion-recognition
#19
Jason Y C Lim, Igor Marques, Amber L Thompson, Kirsten E Christensen, Vitor Felix, Paul D Beer
Electron-deficient heavy chalcogen atoms contain Lewis acidic σ-holes which are able to form attractive supramolecular interactions, known as chalcogen bonding (ChB), with Lewis bases. However, their potential in solution-phase anion binding applications is only just beginning to be realized in simple acyclic systems. Herein, we explore the 5-(methylchalcogeno)-1,2,3-triazole (chalcogen = Se, Te) motif as a novel ChB donor for anion binding. Other than being chemically-robust enough to be in-corporated into macrocyclic structures, thereby significantly expanding the scope and complexity of ChB host systems, we also demonstrate, by 1H NMR and DFT calculations, that the chalcogen atoms oriented within the macrocycle cavity are able to chelate copper(I) endotopically...
January 31, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28135373/elution-profiles-of-two-methods-of-antibiotic-tibial-nail-preparations
#20
Matthew R Karek, Nancy M Jackson, Jeffrey C Flynn, Rahul Vaidya, David C Markel
Interlocking nails coated with antibiotic-supplemented cement provide effective treatment of infected long bone nonunion, but the thicker coating on guidewires may provide greater antibacterial activity. This study compared the properties of cement cured on each construct by evaluating 2-cm segments of 8-mm interlocking nails and 3.5-mm guidewires coated with antibiotic-supplemented cement. Each construct (n=7 for each group) was coated with polymethylmethacrylate cement (Simplex; Stryker Orthopaedics, Mahwah, New Jersey) containing either 1 g tobramycin or 1 g vancomycin powder plus 2...
January 30, 2017: Orthopedics
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