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https://www.readbyqxmd.com/read/29786824/intramedullary-nail-with-integrated-cephalocervical-screws-in-the-intertrochanteric-fractures-treatment-position-of-screws-in-fracture-stability
#1
Gökhan Kaynak, Mehmet Can Ünlü, Mehmet Fatih Güven, Ozan Ali Erdal, Okan Tok, Hüseyin Botanlıoğlu, Önder Aydıngöz
BACKGROUND: Stable fracture fixation is important in the treatment of intertrochanteric femur (ITF) fractures in the elderly population to prevent the loss of reduction, achieve early mobility, and restore independence. The aim of this study was to present the results of surgical treatment of stable and unstable ITF fractures using a trochanteric antegrade intramedullary nail with two cephalocervical screws in an integrated mechanism (Intertan®; Smith & Nephew, Memphis, TN) and evaluate the relationship between the loss of reduction and screw position in the femoral neck in two planes...
May 2018: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29786783/a-xenograft-model-for-venous-malformation
#2
Jillian Goines, Xian Li, Yuqi Cai, Paula Mobberley-Schuman, Megan Metcalf, Steven J Fishman, Denise M Adams, Adrienne M Hammill, Elisa Boscolo
Vascular malformations are defects caused by the abnormal growth of the vasculature. Among them, venous malformation (VM) is an anomaly characterized by slow-flow vascular lesions with abnormally shaped veins, typically in sponge-like configuration. VMs can expand over years causing disfigurement, obstruction of vital structures, thrombosis, bleeding, and pain. Treatments have been very limited and primarily based on supportive care, compression garments, sclerotherapy, and/or surgical resection. Sirolimus treatment has recently shown efficacy in some patients with complicated vascular anomalies, including VMs...
May 21, 2018: Angiogenesis
https://www.readbyqxmd.com/read/29786777/the-biomechanics-of-the-inter-lamellar-matrix-and-the-lamellae-during-progression-to-lumbar-disc-herniation-which-is-the-weakest-structure
#3
Javad Tavakoli, Dhara B Amin, Brian J C Freeman, John J Costi
While microstructural observations have improved our understanding of possible pathways of herniation progression, no studies have measured the mechanical failure properties of the inter-lamellar matrix (ILM), nor of the adjacent lamellae during progression to herniation. The aim of this study was to employ multiscale, biomechanical and microstructural techniques to evaluate the effects of progressive induced herniation on the ILM and lamellae in control, pre-herniated and herniated discs (N = 7), using 2 year-old ovine spines...
May 21, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29786740/shear-density-coupling-for-a-compressible-single-component-yield-stress-fluid
#4
Markus Gross, Fathollah Varnik
Flow behavior of a single-component yield stress fluid is addressed on the hydrodynamic level. A basic ingredient of the model is a coupling between fluctuations of density and velocity gradient via a Herschel-Bulkley-type constitutive model. Focusing on the limit of low shear rates and high densities, the model approximates well-but is not limited to-gently sheared hard sphere colloidal glasses, where solvent effects are negligible. A detailed analysis of the linearized hydrodynamic equations for fluctuations and the resulting cubic dispersion relation reveals the existence of a range of densities and shear rates with growing flow heterogeneity...
May 22, 2018: Soft Matter
https://www.readbyqxmd.com/read/29786600/shock-synthesis-and-characterization-of-titanium-dioxide-with-%C3%AE-pbo-sub-2-sub-structure
#5
Zhen Tan, Pengwan Chen, Qiang Zhou, Jianjun Liu, Xiaofeng Mei, Bi Wang, Naifu Cui
The phase transformation behavior of anatase and rutile titanium dioxide with particle sizes of 60 nm and 150 nm under shock compression have been investigated. To increase the shock pressure and reduce the shock temperature, copper powder and a small amount of paraffin were mixed with the TiO2 powder. The shock recovered samples were characterized by X-ray diffraction, Raman spectroscopy, and transmission electron microscope. The results indicate that both anatase and rutile TiO2 can transform to α-PbO2 phase TiO2 through shock-induced phase transition...
May 22, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29785464/contribution-of-cochlear-compression-to-discrimination-of-rippled-spectra-in-on-and-low-frequency-noise
#6
Olga N Milekhina, Dmitry I Nechaev, Alexander Ya Supin
The goal of the study was to assess cochlear compression when rippled-spectrum signals are perceived in noise assuming that the noise might produce both masking and confounding effects. In normal listeners, discrimination between rippled signals with and without ripple phase reversals was assessed in background noise. The signals were band-limited (0.5 oct at a - 6-dB level) rippled noise centered at 2 kHz, with a ripple density of 3.5 oct-1 . The noise (masker) was band-limited nonrippled noise centered at either 2 kHz (on-frequency masker) or 1 kHz (low-frequency masker)...
May 21, 2018: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/29785314/osteochondroma-of-the-scapula-with-accessory-nerve-xi-compression
#7
Philippe Beauchamp-Chalifour, Stéphane Pelet
Osteochondroma is the most common benign bone tumor and is characterized as a cartilage-capped bony stalk. This lesion usually develops from the growth plate of long bones. Most osteochondromas are asymptomatic. Neurovascular compressions or cosmetic issues can occur in specific locations. Malignant transformation is extremely rare, and MRI can help evaluate these lesions. Symptomatic mass and malignancy features are the main surgical indications. Uncommonly, an osteochondroma can develop from flat bones. We present the case of a 25-year-old patient with a right scapula osteochondroma causing an accessory nerve compression...
2018: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/29785238/intralesional-injection-of-triamcinolone-acetonide-for-subcutaneous-lipoma-causing-musculoskeletal-and-neurologic-symptoms
#8
William A Hayward, Wilmer L Sibbitt, Randy R Sibbitt, Maheswari Muruganandam, Noelle A Rolle, Monthida Fangtham, N Suzanne Emil, Scarlett K Kettwich
Objective: Benign subcutaneous lipomas can cause musculoskeletal pain and nerve impingement. We hypothesized that the potent lipolytic and atrophic effect of 40mg/mL triamcinolone acetonide would atrophy symptomatic lipomas so surgical excision could be avoided. Design: This was a cohort study. Setting: This study took place in an ultrasound injection clinic. Participants: Eight subjects with painful symptomatic lipoma were included. Measurements: Preprocedurally, the margins of the lipomas were palpated and marked with ink, then measured in centimeters (cm)...
May 2018: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/29785225/bipolar-dislocation-of-the-arm-shoulder-and-elbow-about-one-case-in-an-african-teaching-hospital
#9
D A Songahir Christophe, Korsaga Alexandre, Tinto Sayouba, Sawadogo Mamoudou, Kafando Hamado, Ouedraogo Anatole Jean Innocent, Zeida Charles, Keita Namori, Tall Mohamed
We report an exceptional clinical case of an ipsilateral dislocation fracture of the shoulder and right elbow, realizing a "swinging arm". Following a violent road accident, patient S.I, a 43-year-old left-handed sports educator, presented with an antero-medial shoulder dislocation fracture and a posterolateral ipsilateral elbow fracture-dislocation. The reduction in urgency, followed by the orthopedic compression by Mayo Clinic and functional rehabilitation, allowed obtaining a good result after seven months...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29785178/functionally-graded-bone-and-tendon-like-polyurethane-for-rotator-cuff-repair
#10
Dai Fei Elmer Ker, Dan Wang, Anthony William Behn, Evelyna Tsi Hsin Wang, Xu Zhang, Benjamin Yamin Zhou, Ángel Enrique Mercado-Pagán, Sungwoo Kim, John Kleimeyer, Burhan Gharaibeh, Yaser Shanjani, Drew Nelson, Marc Safran, Emilie Cheung, Phil Campbell, Yunzhi Peter Yang
Critical considerations in engineering biomaterials for rotator cuff repair include bone-tendon-like mechanical properties to support physiological loading and biophysicochemical attributes that stabilize the repair site over the long-term. In this study, UV-crosslinkable polyurethane based on quadrol (Q), hexamethylene diisocyante (H), and methacrylic anhydride (M; QHM polymers), which are free of solvent, catalyst, and photoinitiator, is developed. Mechanical characterization studies demonstrate that QHM polymers possesses phototunable bone- and tendon-like tensile and compressive properties (12-74 MPa tensile strength, 0...
May 2018: Advanced Functional Materials
https://www.readbyqxmd.com/read/29785099/comparison-of-the-effectiveness-of-complex-decongestive-therapy-and-compression-bandaging-as-a-method-of-treatment-of-lymphedema-in-the-elderly
#11
Ewa Zasadzka, Tomasz Trzmiel, Maria Kleczewska, Mariola Pawlaczyk
Background: Lymphedema is a chronic condition which significantly lowers the quality of patient life, particularly among elderly populations, whose mobility and physical function are often reduced. Objectives: The aim of the study was to compare the effectiveness of multi-layer compression bandaging (MCB) and complex decongestive therapy (CDT), and to show that MCB is a cheaper, more accessible and less labor intensive method of treating lymphedema in elderly patients...
2018: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29785032/solvents-can-control-solute-molecular-identity
#12
Devon R Widmer, Benjamin J Schwartz
For solution-phase chemical reactions, the solvent is often considered simply as a medium to allow the reactants to encounter each other by diffusion. Although examples of direct solvent effects on molecular solutes exist, such as the compression of solute bonding electrons due to Pauli repulsion interactions, the solvent is not usually considered a part of the chemical species of interest. We show, using quantum simulations of Na2 , that when there are local specific interactions between a solute and solvent that are energetically on the same order as a hydrogen bond, the solvent controls not only the bond dynamics but also the chemical identity of the solute...
May 21, 2018: Nature Chemistry
https://www.readbyqxmd.com/read/29784799/amorphous-boron-oxide-at-megabar-pressures-via-inelastic-x-ray-scattering
#13
Sung Keun Lee, Yong-Hyun Kim, Paul Chow, Yunming Xiao, Cheng Ji, Guoyin Shen
Structural transition in amorphous oxides, including glasses, under extreme compression above megabar pressures (>1 million atmospheric pressure, 100 GPa) results in unique densification paths that differ from those in crystals. Experimentally verifying the atomistic origins of such densifications beyond 100 GPa remains unknown. Progress in inelastic X-ray scattering (IXS) provided insights into the pressure-induced bonding changes in oxide glasses; however, IXS has a signal intensity several orders of magnitude smaller than that of elastic X-rays, posing challenges for probing glass structures above 100 GPa near the Earth's core-mantle boundary...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29784454/hyaluronidase-to-reduce-a-prolapsed-incontinent-ischemic-ileovesicostomy
#14
Patrick T Gomella, Hans G Pohl, Aaron J Krill
Stomal prolapse is a known late complication of urinary diversions commonly used in urology. While rare, it can lead to ischemia, necrosis, and obstruction of the stoma, requiring urgent reduction before formal revision can be undertaken. Several measures can be attempted to reduce the prolapse including manual pressure and topical osmotic agents. One method that has not been reported in the urologic literature is the use of hyaluronidase. Herein, we report the first case in the literature of hyaluronidase usage to assist in reduction of an ischemic and obstructed prolapsed incontinent ileovesicostomy after manual compression failed...
May 12, 2018: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/29784438/accuracy-and-reproducibility-of-sonoelastography-for-the-assessment-of-fibroids-and-adenomyosis-with-magnetic-resonance-imaging-as-reference-standard
#15
Barbara Stoelinga, Wouter J K Hehenkamp, Lotte L Nieuwenhuis, Mandy M A Conijn, JanHein H T M van Waesberghe, Hans A M Brölmann, Judith A F Huirne
The aims of this prospective diagnostic evaluation study were (i) to estimate the inter-observer agreement and reproducibility of real-time sonoelastography and real-time gray-scale ultrasound in the measurement of uterine and fibroid volumes; (ii) to evaluate the agreement between real-time gray-scale ultrasound, sonoelastography and magnetic resonance imaging with respect to these outcomes; and (iii) to evaluate the diagnostic accuracy of sonoelastography in the diagnosis of uterine pathology on stored sonoelastography and gray-scale cine loops...
May 18, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29784430/microvascular-decompression-for-hemifacial-spasm-surgical-techniques-and-intraoperative-monitoring
#16
M Sindou, P Mercier
Primary hemifacial spasm with few exceptions is due to the vascular compression of the facial nerve that can be evidenced with high resolution MRI. Microvascular decompression is the only curative treatment for this pathology. According to literature review detailed in chapter "conflicting vessels", the compression is located at the facial Root Exit Zone (REZ) in 95% of the cases, and in 5% distally at the cisternal or the intrameatal portion of the root as the sole conflict or in addition to one at brainstem/REZ...
May 18, 2018: Neuro-Chirurgie
https://www.readbyqxmd.com/read/29784084/perception-of-social-interaction-compresses-subjective-duration-in-an-oxytocin-dependent-manner
#17
Rui Liu, Xiangyong Yuan, Kepu Chen, Yi Jiang, Wen Zhou
Communication through body gestures permeates our daily life. Efficient perception of the message therein reflects one's social cognitive competency. Here we report that such competency is manifested temporally as shortened subjective duration of social interactions: motion sequences showing agents acting communicatively are perceived to be significantly shorter in duration as compared with those acting noncommunicatively. The strength of this effect is negatively correlated with one's autistic-like tendency...
May 22, 2018: ELife
https://www.readbyqxmd.com/read/29783914/early-application-of-an-intermittent-pneumatic-compression-device-is-safe-and-results-in-proximal-arteriovenous-fistula-enlargement
#18
Sanjay Desai, Amit Mitra, Ed Arkans, Tej M Singh
INTRODUCTION: Delays in arteriovenous fistula maturation can cause care delays and increased costs. Increased distention pressure and intermittent wall shear stress may dilate veins based on prior research. Early use of non-invasive devices may help assist clinical arteriovenous fistula dilation. METHODS: This was an Institutional Review Board approved study. After arteriovenous fistula creation, a novel, intermittent pneumatic compression device (Fist Assist® ) was applied 15 cm proximal to arteriovenous fistula enabling 60 mmHg of cyclic compression for 6 h daily for 30 days...
May 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29783902/optimal-plate-fixation-of-distal-femoral-fractures-in-the-presence-of-a-well-fixed-cemented-hip-arthroplasty-femoral-stem
#19
Josh Kempthorne, David C Kieser, Cameron G Walker
INTRODUCTION: The requirement for lateral plate fixation in the presence of a hip arthroplasty stem is increasing, yet the optimal plate construct necessary to reduce inter-prosthetic strain and prevent subsequent fractures is unknown. Therefore, the purpose of this study was to determine the optimal position of a lateral femoral plate in relation to a femoral stem. METHODS: We used 4th Generation Composite Sawbones® , a collarless polished cemented femoral stem and a broad Peri-loc™ plate with varying overlap of the stem...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29783695/application-of-a-novel-anti-adhesive-membrane-e8002-in-a-rat-laminectomy-model
#20
Kiyoshi Kikuchi, Kentaro Setoyama, Takuto Terashi, Megumi Sumizono, Salunya Tancharoen, Shotaro Otsuka, Seiya Takada, Kazuki Nakanishi, Koki Ueda, Harutoshi Sakakima, Ko-Ichi Kawahara, Ikuro Maruyama, Gohsuke Hattori, Motohiro Morioka, Eiichiro Tanaka, Hisaaki Uchikado
Neuropathic pain after spinal surgery, so-called failed back surgery syndrome, is a frequently observed common complication. One cause of the pain is scar tissue formation, observed as post-surgical epidural adhesions. These adhesions may compress surrounding spinal nerves, resulting in pain, even after successful spinal surgery. E8002 is an anti-adhesive membrane. In Japan, a clinical trial of E8002 is currently ongoing in patients undergoing abdominal surgery. However, animal experiments have not been performed for E8002 in spinal surgery...
May 18, 2018: International Journal of Molecular Sciences
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