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https://www.readbyqxmd.com/read/28822311/lingular-segment-torsion-following-a-left-upper-division-segmentectomy
#1
Naohiro Taira, Hidenori Kawasaki, Sayako Takahara, Tomonori Furugen, Takaharu Ichi, Kazuaki Kushi, Tomofumi Yohena, Tsutomu Kawabata
INTRODUCTION: Numerous publications regarding lung torsion have reported lobar torsion after lobectomy. On the other hand, torsion of the remaining segment after segmentectomy is extremely rare. We herein report a rare case of lingular segment torsion following a left upper division segmentectomy. CASE: A 68-year old female underwent thoracoscopic segmentectomy of the left upper division. She underwent chest radiography immediately after the initial surgery, which revealed complete expansion on the operated side...
August 4, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28818338/spinal-anesthesia-for-pediatric-urological-surgery-reducing-the-theoretic-neurotoxic-effects-of-general-anesthesia
#2
Emmett E Whitaker, Brianne Z Wiemann, Daniel G DaJusta, Seth A Alpert, Christina B Ching, Daryl J McLeod, Joseph D Tobias, Venkata R Jayanthi
BACKGROUND: Spinal anesthesia (SA) is an effective technique that has been used in children for years. With growing concern with regard to the risks of general anesthesia (GA), we developed a SA program to provide an alternative option. We present our initial experience with this program. OBJECTIVE: To implement a SA program at a large tertiary care pediatric center and assess the safety and efficacy of the technique as an alternative to GA for urologic surgery...
July 14, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28817161/biomechanical-evaluation-of-unicortical-stress-risers-of-the-proximal-humerus-associated-with-pectoralis-major-repair
#3
David J Wilson, Brian P Milam, William F Scully, Todd P Balog, Kyong S Min, Christopher S Chen, Bryant G Marchant, Edward D Arrington
Proximal humerus fracture after pectoralis major tendon repair has been recently reported. Although this complication is rare, it may be possible to decrease such risk using newer techniques for myotenodesis. This study was designed to evaluate various unicortical stress risers created at the proximal humeral metadiaphysis during myotenodesis for repair of pectoralis major ruptures. A simulated pectoralis major myotenodesis was performed using fourth-generation Sawbones (N=30). Using previously described anatomic landmarks for the tendinous insertion, 3 repair techniques were compared: bone trough, tenodesis screws, and suture anchors (N=10 each)...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28816771/primary-omental-torsion-in-a-pediatric-patient-case-report-and-review-of-the-literature
#4
Emad S Madha, Timothy D Kane, Mioara D Manole
Primary omental torsion is a rare cause of acute abdominal pain with a clinical presentation resembling acute appendicitis. Here, we report the case of a 7-year-old child presenting with right lower quadrant pain. Primary omental torsion was discovered upon laparoscopy, and the torsed omentum was excised without postoperative complications. Potential causes, contributing factors, diagnosis, and treatment are discussed.
July 3, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28815237/induced-polarization-restricts-the-conformational-distribution-of-a-light-harvesting-molecular-triad-in-the-ground-state
#5
Oleg N Starovoytov, Pengzhi Zhang, Piotr Cieplak, Margaret S Cheung
The light-harvesting molecular triad consisting of carotenoid polyene (C), diaryl-porphyrin (P) and pyrrole-fullerene (C60) is a donor-acceptor molecule capable of absorbing incident light in the visible range. Its ability to convert solar energy to electrical excitation and charge separation energy suggests a great potential in real-world applications. The ensemble of its conformations under ambient conditions varies widely according to its electronic state. In previous work, we applied a non-polarizable model to study the conformational distribution of the molecular triad in the ground and charge separated states...
August 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28814404/adaptive-spatiotemporal-changes-in-morphology-anatomy-and-mechanics-during-the-ontogeny-of-subshrubs-with-square-shaped-stems
#6
Ruwen Kaminski, Thomas Speck, Olga Speck
PREMISE OF THE STUDY: Plant stems can be regarded as fiber-reinforced structures characterized by anatomical heterogeneity, mechanical anisotropy, and adaptability to changing internal and external constraints. Our study focused on adaptive spatiotemporal changes in morphology, anatomy, and mechanical properties during the ontogeny of Leonurus cardiaca L. (Lamiaceae) internodes, proving considerable functional adaptability. METHODS: Four-point bending tests and torsional tests were carried out on the same internodes to measure flexural and torsional stiffness...
August 16, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28812465/melanotic-neuroectodermal-tumor-of-infancy-presenting-with-fast-growing-scrotal-swelling-a-case-report-and-literature-review
#7
Corinthia Fabien-Dupuis, Benjamin Niver, Nick Shillingford, Larry Wang, Paul J Kokorowski, Shengmei Zhou
Testicular melanotic neuroectodermal tumor of infancy (MNTI) is extremely rare, with 2 cases reported in the literature. Its rarity and rapid and infiltrative growth pattern pose a diagnostic challenge. A previously healthy 3-month-old male, presented with a history of worsening left hemiscrotal swelling for 1 week. An outside ultrasound was suggestive of testicular torsion. Left orchiectomy demonstrated a mass occupying almost entire testicle with a variegated cut surface, with areas of pigmentation, necrosis, and hemorrhage...
September 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28808835/carbazole-substituted-bodipys-synthesis-computational-electrochemical-and-dssc-studies
#8
Praseetha E Kesavan, Raghu Nath Behera, Shigeki Mori, Iti Gupta
Carbazole and p-anisyl substituted BODIPY dyes with a cyanoacetic acid anchoring group have been prepared and their spectral, electrochemical properties and photosensitizing potential in DSSC have been evaluated. X-ray structure of N-phenylcarbazole substituted BODIPY revealed lower torsion angle between BODIPY plane and carbazole plane, suggesting increased communication between the two units. DFT studies indicated effective electronic interactions between the BODIPY unit and carbazole substituents. The N-butylcarbazole and N-phenylcarbazole substituted BODIPYs showed anodic shifts in their reduction potentials, indicating facile reduction process...
August 14, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28808753/segmental-torsion-assessment-is-a-reliable-method-for-in-depth-analysis-of-femoral-alignment-in-computer-tomography
#9
Peter Wilhelm Ferlic, Armin Runer, Christopher Seeber, Maria Thöni, Gerd Seitlinger, Michael Christian Liebensteiner
PURPOSE: De-rotational osteotomies are indicated in patients with pathologic femoral torsion. However, there is disagreement whether an osteotomy should be performed proximally or distally. Conventionally only the total torsion is measured, which does not allow differentiation between a torsional deformity located in the proximal or distal metaphysis or the diaphysis. The aim of this study is to validate a new multi-level measurement protocol for evaluation of the magnitude of torsion of the respective femoral segments in CT...
August 14, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28808638/effect-of-surface-treatment-on-the-mechanical-properties-of-nickel-titanium-files-with-a-similar-cross-section
#10
Sang Won Kwak, Joo Yeong Lee, Hye-Jin Goo, Hyeon-Cheol Kim
OBJECTIVES: The aim of this study was to compare the mechanical properties of various nickel-titanium (NiTi) files with similar tapers and cross-sectional areas depending on whether they were surface-treated. MATERIALS AND METHODS: Three NiTi file systems with a similar convex triangular cross-section and the same ISO #25 tip size were selected for this study: G6 (G6), ProTaper Universal (PTU), and Dia-PT (DPT). To test torsional resistance, 5 mm of the straightened file's tip was fixed between polycarbonate blocks (n = 15/group) and continuous clockwise rotation until fracture was conducted using a customized device...
August 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28808372/cardiac-herniation-with-torsion-after-right-pneumonectomy
#11
Wolfram Schummer
No abstract text is available yet for this article.
July 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28808217/electromyography-and-fos-immunostaining-study-establish-a-possible-functional-link-between-trigeminal-proprioception-and-the-oculomotor-system-in-rats
#12
Houcheng Liang, Jingdong Zhang, Pifu Luo, Hongna Zhu, Ying Qiao, Anle Su, Ting Zhang
The objective of this study was to explore whether there was a functional link between trigeminal proprioception and the oculomotor system mediated through jaw muscle afferents. Electromyography (EMG) was undertaken of the levator palpebrae (LP) and superior rectus (SR), and Fos expression was detected in the brainstem following consecutive down-stretching of the lower jaw at 2-4 Hz in rats. Retrograde tracing was undertaken of the interstitial nucleus of Cajal and Darkschewitsch nucleus (INC/DN) pre-oculomotor neurons...
January 19, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28807513/second-generation-prototype-of-a-variable-stiffness-transverse-plane-adapter-for-a-lower-limb-prosthesis
#13
Corey Pew, Glenn K Klute
The prescription and fitting of a traditional lower limb prosthesis often focuses on straight walking, neglecting maneuvers such as turning and pivoting that require flexibility in the transverse plane. Current devices that allow transverse plane movement only offer a fixed stiffness and are incapable of adapting to varying daily activities. Pilot testing of a first-generation variable stiffness torsion adapter (VSTA I) showed a benefit for individuals with lower limb amputation by reducing peak transverse plane moments at the residual limb which could lead to increased comfort, but testing was limited due to excessive device height and mass...
August 11, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28805861/site-dependent-effects-of-methylation-on-the-electronic-spectra-of-jet-cooled-methylated-xanthine-compounds
#14
Doory Kim, Key Young Yang, Hyung Min Kim, Tae-Rae Kim, Nam Joon Kim, Seokmin Shin, Seong Keun Kim
We obtained the electronic spectra of various methylated xanthine compounds including caffeine in a supersonic jet by resonant two-photon ionization spectroscopy. The methyl group in the tested methylated xanthine compounds has a distinct, site-dependent effect on the electronic spectrum. Methylation at the N3 position causes a significant red shift of the ππ* state, whereas methylation at the N1 position has only minimal effects on the electronic spectrum. The notably broad spectra of theobromine and caffeine result from methyl substitution at the N7 position, which causes a large displacement between the potential energy surfaces of the S0 and S1 states, and a strong vibronic coupling...
August 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28802483/left-ventricular-systolic-myocardial-deformation-a%C3%A2-comparison-of-two-and-three-dimensional-echocardiography-in-children
#15
Sowmya Balasubramanian, Rajesh Punn, Shea N Smith, Helene Houle, Theresa A Tacy
BACKGROUND: The clinical applicability and reliability of three-dimensional (3D) speckle-tracking echocardiography has not been well studied in pediatric patients. The aim of this study was to compare two-dimensional (2D) echocardiography and 3DE real-time full-volume-derived strain and rotation indices in healthy children and patients with dilated cardiomyopathy (DCM). METHODS: Children with either normal function or DCM were prospectively recruited in an outpatient setting, and deformation indices, including circumferential, radial, and longitudinal strain and torsion, were measured by 2D and 3D echocardiography...
August 9, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28802221/in-vivo-mechanical-behaviour-of-the-anterior-cruciate-ligament-a-study-of-six-daily-and-high-impact-activities
#16
Elisa Roldán, Neil D Reeves, Glen Cooper, Kirstie Andrews
The anterior cruciate ligament (ACL) plays a key role in the stability of the knee joint restricting the rotation and anterior tibial translation. However, there is a lack of knowledge of the in vivo ACL mechanical behaviour during high impact manoeuvres. The motion of 12 young participants with healthy knees was captured while they performed the following activities: walking, running, cross-over cutting, sidestep cutting, jumping and jumping with one leg. The in vivo ACL length and strain were estimated using experimental kinematic data and three degree of freedom (DOF) knee model...
August 1, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28800742/an-intramedullary-echidna-pin-for-fixation-of-comminuted-clavicle-fractures-a-biomechanical-study
#17
David Ackland, Ian Griggs, Patrick Hislop, Wen Wu, Minoo Patel, Martin Richardson
BACKGROUND: Intramedullary fixation of comminuted mid-shaft clavicle fractures has traditionally been employed with satisfactory clinical outcomes; however, pins with smooth surfaces may protrude from the bone and are prone to migration, while some threaded pins are difficult to remove post-operatively. The aim of this proof-of-concept study was to develop and evaluate the biomechanical strength of a novel intramedullary Echidna pin device designed to maintain fracture reduction, resist migration and facilitate ease of post-operative removal...
August 11, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28799201/new-experimental-reference-data-for-hexafluorinated-propanol-by-exploring-an-unusual-intermolecular-torsional-balance
#18
Sönke Oswald, Martin A Suhm
The hydrogen-bonded dimer of 1,1,1,3,3,3-hexafluoro-2-propanol forms an intermolecular -OH...O- torsional balance, in which the acceptor OH group can point away from or towards the fluorines of the donor. It prefers the former arrangement in the free dimer, but dinitrogen coordination of the acceptor OH favors the latter, as FTIR spectroscopy in supersonic jets suggests. A multi-step divide-and-conquer strategy was employed to rule out density functional and other inexpensive quantum chemical methods within the harmonic approximation...
August 11, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28798372/multi-level-quantum-mechanics-and-molecular-mechanics-study-of-ring-opening-process-of-guanine-damage-by-hydroxyl-radical-in-aqueous-solution
#19
Peng Liu, Qiong Wang, Meixing Niu, Dunyou Wang
Combining multi-level quantum mechanics theories and molecular mechanics with an explicit water model, we investigated the ring opening process of guanine damage by hydroxyl radical in aqueous solution. The detailed, atomic-level ring-opening mechanism along the reaction pathway was revealed in aqueous solution at the CCSD(T)/MM levels of theory. The potentials of mean force in aqueous solution were calculated at both the DFT/MM and CCSD(T)/MM levels of the theory. Our study found that the aqueous solution has a significant effect on this reaction in solution...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28795163/a-reformulation-of-mechanics-and-electrodynamics
#20
Mario J Pinheiro
Classical mechanics, as commonly taught in engineering and science, are confined to the conventional Newtonian theory. But classical mechanics has not really changed in substance since Newton formulation, describing simultaneous rotation and translation of objects with somewhat complicate drawbacks, risking interpretation of forces in non-inertial frames. In this work we introduce a new variational principle for out-of-equilibrium, rotating systems, obtaining a set of two first order differential equations that introduces a thermodynamic-mechanistic time into Newton's dynamical equation, and revealing the same formal symplectic structure shared by classical mechanics, fluid mechanics and thermodynamics...
July 2017: Heliyon
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