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https://www.readbyqxmd.com/read/28626162/intervention-of-the-nuss-procedure-on-the-mental-health-of-pectus-excavatum-patients
#1
Li Luo, Bo Xu, Xinling Wang, Bo Tan, Jing Zhao
Pectus excavatum (PE) is the most common congenital chest wall deformity, but little is known about the influence of the Nuss surgical procedure on mental health of patients with PE. In this study, we aimed to evaluate the influence of the PE Nuss surgical procedure on mental health in Chinese patients and identify the predictors of psychological status for PE. Patients with PE (n = 266) underwent a standard surgical procedure by the same surgeon and did the Symptom Checklist 90 (SCL-90) and the Self-rating Depression Scale (SDS) questionnaires before and 1 year after surgery...
June 16, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28624480/evaluation-of-thoracic-vertebrae-rotation-in-patients-with-pectus-excavatum
#2
Ryszard Tomaszewski, Łukasz Wiktor, Ludwina Machała
PURPOSE: The aim of our study was to evaluate thoracic vertebrae rotation in patients with pectus excavatum. Moreover, we wanted to assess the prevalence, the severity and relationship between pectus excavatum and adolescent idiopathic scoliosis (AIS). METHODS: We performed retrospective analysis of 82 preoperative chest CT in children with pectus excavatum performed between January 2008 and December 2011. For each patient Haller Index and Cobb angle was measured...
June 14, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28620745/strain-imaging-using-cardiac-magnetic-resonance
#3
REVIEW
A Scatteia, A Baritussio, C Bucciarelli-Ducci
The objective assessments of left ventricular (LV) and right ventricular (RV) ejection fractions (EFs) are the main important tasks of routine cardiovascular magnetic resonance (CMR). Over the years, CMR has emerged as the reference standard for the evaluation of biventricular morphology and function. However, changes in EF may occur in the late stages of the majority of cardiac diseases, and being a measure of global function, it has limited sensitivity for identifying regional myocardial impairment. On the other hand, current wall motion evaluation is done on a subjective basis and subjective, qualitative analysis has a substantial error rate...
June 15, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28618768/psychosocial-functioning-in-pediatric-patients-with-pectus-excavatum-and-pectus-carinatum
#4
Aliye Tuğba Bahadir, Pınar Kuru Bektaşoğlu, Aylin Çakiroğlu Eser, Ceyda Afacan, Mustafa Yüksel
BACKGROUND/AIM: Pectus excavatum and pectus carinatum are the most commonly seen anterior chest wall deformities. Recent studies reveal that minimal invasive repair of pectus deformities improves the quality of life. Our aim is to assess the psychosocial functioning and sociodemographic characteristics of pediatric patients with pectus deformities and evaluate the differences between patients operated on with minimal invasive repair techniques and nonoperated patients. MATERIALS AND METHODS:  Thirty-two patients with pectus deformities who were operated on 6 months or more before and 31 nonoperated patients participated in the study...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28618477/stability-of-viscous-film-flow-coating-the-interior-of-a-vertical-tube-with-a-porous-wall
#5
Rong Liu, Zijing Ding
The stability of the gravity-driven flow of a viscous film coating the inside of a tube with a porous wall is studied theoretically. We used Darcy's law to describe the motion of fluids in a porous medium. The Beaver-Joseph condition is used to describe the discontinuity of velocity at the porous-fluid interface. We derived an evolution equation for the film thickness using a long-wave approximation. The effect of velocity slip at the porous wall is identified by a parameter β. We examine the effect of β on the temporal stability, the absolute-convective instability (AI-CI), and the nonlinear evolution of the interface deformation...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28616762/a-systematic-comparison-of-cardiovascular-magnetic-resonance-and-high-resolution-histological-fibrosis-quantification-in-a-chronic-porcine-infarct-model
#6
Johannes M I H Gho, René van Es, Frebus J van Slochteren, Sanne J Jansen Of Lorkeers, Allard J Hauer, Joep W M van Oorschot, Pieter A Doevendans, Tim Leiner, Aryan Vink, Folkert W Asselbergs, Steven A J Chamuleau
The noninvasive reference standard for myocardial fibrosis detection on cardiovascular magnetic resonance imaging (CMR) is late gadolinium enhancement (LGE). Currently there is no consensus on the preferred method for LGE quantification. Moreover myocardial wall thickening (WT) and strain are measures of regional deformation and function. The aim of this research was to systematically compare in vivo CMR parameters, such as LGE, WT and strain, with histological fibrosis quantification. Eight weeks after 90 min ischemia/reperfusion of the LAD artery, 16 pigs underwent in vivo Cine and LGE CMR...
June 14, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28615652/development-of-a-computer-aided-design-and-finite-element-analysis-combined-method-for-customized-nuss-bar-in-pectus-excavatum-surgery
#7
Longhan Xie, Siqi Cai, Liang Xie, Gang Chen, Haiyu Zhou
Pectus excavatum (PEX) is the most common chest deformity in children, which is usually corrected by using the minimally invasive Nuss method. The orthopedic effect of the Nuss operation is mainly evaluated by both the Haller index and the appearance of the chest wall configuration, which is dependent on the operator's clinical experience to a great extent. To improve the orthopedic effect, we proposed a novel method to individually design and optimize the shape of the Nuss bar and to advise its location as well as the incisions...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28608799/in-vitro-and-in-vivo-studies-of-alar-nasal-cartilage-using-autologous-micro-grafts-the-use-of-the-rigenera-%C3%A2-protocol-in-the-treatment-of-an-osteochondral-lesion-of-the-nose
#8
Gabriele Ceccarelli, Pietro Gentile, Marco Marcarelli, Martina Balli, Flavio Lorenzo Ronzoni, Laura Benedetti, Maria Gabriella Cusella De Angelis
Cartilage defects represent a serious problem due to the poor regenerative properties of this tissue. Regarding the nose, nasal valve collapse is associated with nasal blockage and persistent airway obstruction associated with a significant drop in the quality of life for patients. In addition to surgical techniques, several cell-based tissue-engineering strategies are studied to improve cartilage support in the nasal wall, that is, to ameliorate wall insufficiency. Nevertheless, there are no congruent data available on the benefit for patients during the follow-up time...
June 13, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28603707/maxillary-resection-for-cancer-zygomatic-implants-insertion-and-palatal-repair-as-single-stage-procedure-report-of-three-cases
#9
Pietro Salvatori, Antonio Mincione, Lucio Rizzi, Fabrizio Costantini, Alessandro Bianchi, Emma Grecchi, Umberto Garagiola, Francesco Grecchi
BACKGROUND: Oronasal/antral communication, loss of teeth and/or tooth-supporting bone, and facial contour deformity may occur as a consequence of maxillectomy for cancer. As a result, speaking, chewing, swallowing, and appearance are variably affected. The restoration is focused on rebuilding the oronasal wall, using either flaps (local or free) for primary closure, either prosthetic obturator. Postoperative radiotherapy surely postpones every dental procedure aimed to set fixed devices, often makes it difficult and risky, even unfeasible...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28603565/current-concepts-congenital-scoliosis
#10
Agnivesh Tikoo, Manish K Kothari, Kunal Shah, Abhay Nene
BACKGROUND: Congenital scoliosis is one of the 'difficult to treat' scenarios which a spine surgeon has to face. Multiple factors including the age of child at presentation, no definite pattern of deformity and associated anomalies hinder the execution of the ideal treatment plan. All patients of congenital scoliosis need to be investigated in detail. X rays and MRI of spine is usually ordered first. Screening investigations to rule out VACTERL (Visceral, Anorectal, Cardiac, Tracheo-esophageal fistula, Renal and Lung) abnormalities are required...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28592962/how-to-detect-atrial-fibrosis
#11
REVIEW
Juan Lacalzada-Almeida, Javier García-Niebla
In the last twenty years, new imaging techniques to assess atrial function and to predict the risk of recurrence of atrial fibrillation after treatment have been developed. The present review deals with the role of these techniques in the detection of structural and functional changes of the atrium and diagnosis of atrial remodeling, particularly atrial fibrosis. Echocardiography allows the detection of anatomical, functional changes and deformation of the atrial wall during the phases of the cardiac cycle...
March 2017: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/28592791/dimensionless-number-is-central-to-stress-relaxation-and-expansive-growth-of-the-cell-wall
#12
Joseph K E Ortega
Experiments demonstrate that both plastic and elastic deformation of the cell wall are necessary for wall stress relaxation and expansive growth of walled cells. A biophysical equation (Augmented Growth Equation) was previously shown to accurately model the experimentally observed wall stress relaxation and expansive growth rate. Here, dimensional analysis is used to obtain a dimensionless Augmented Growth Equation with dimensionless coefficients (groups of variables, or Π parameters). It is shown that a single Π parameter controls the wall stress relaxation rate...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28592727/temporal-sequential-pattern-of-right-ventricular-free-wall-contraction-in-normal-children
#13
Yasunobu Hayabuchi, Akemi Ono, Yukako Homma, Shoji Kagami
BACKGROUND: The temporal sequence of right ventricular (RV) deformation is related to RV dysfunction. The sequence of RV free wall contraction was investigated.Methods and Results:In this prospective study, strain profiles using speckle-tracking echocardiography and tissue Doppler-derived pulmonary and tricuspid annular motion were assessed in 60 normal children. Circumferential RV free wall strain of 3 individual segments (anterior, lateral, and inferior) was evaluated. Longitudinal strain was assessed in 3 individual segments (RV outflow tract [RVOT], apical, and RV inflow tract [RVIT])...
June 6, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28590755/morphology-evolution-of-polymer-blends-under-intense-shear-during-high-speed-thin-wall-injection-molding
#14
Yi Zhou, Feilong Yu, Hua Deng, Yajiang Huang, Guangxian Li, Qiang Fu
The morphology evolution under shear during different processing is indeed an important issue regarding the phase morphology control as well as final physical properties of immiscible polymer blends. High-speed thin wall injection molding (HSTWIM) has recently been demonstrated as an effective method to prepare alternating multilayered structure. To understand the formation mechanism better and explore possible phase morphology for different blends under HSTWIM, the relationship between the morphology evolution of polymer blends based on polypropylene (PP) under HSTWIM and some intrinsic properties of polymer blends, including viscosity ratio, interfacial tension, and melt elasticity, is systematically investigated in this study...
June 16, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28590449/development-of-laser-scanner-for-full-cross-sectional-deformation-monitoring-of-underground-gateroads
#15
Qianlong Yang, Zhenyu Zhang, Xiaoqian Liu, Shuqi Ma
The deformation of underground gateroads tends to be asymmetric and complex. Traditional instrumentation fails to accurately and conveniently monitor the full cross-sectional deformation of underground gateroads. Here, a full cross-sectional laser scanner was developed, together with a visualization software package. The developed system used a polar coordinate measuring method and the full cross-sectional measurement was shown by 360° rotation of a laser sensor driven by an electrical motor. Later on, the potential impact of gateroad wall flatness, roughness, and geometrical profile, as well as coal dust environment on the performance of the developed laser scanner will be evaluated...
June 7, 2017: Sensors
https://www.readbyqxmd.com/read/28589126/myocardial-architecture-mechanics-and-fibrosis-in-congenital-heart-disease
#16
REVIEW
Sarah Ghonim, Inga Voges, Peter D Gatehouse, Jennifer Keegan, Michael A Gatzoulis, Philip J Kilner, Sonya V Babu-Narayan
Congenital heart disease (CHD) is the most common category of birth defect, affecting 1% of the population and requiring cardiovascular surgery in the first months of life in many patients. Due to advances in congenital cardiovascular surgery and patient management, most children with CHD now survive into adulthood. However, residual and postoperative defects are common resulting in abnormal hemodynamics, which may interact further with scar formation related to surgical procedures. Cardiovascular magnetic resonance (CMR) has become an important diagnostic imaging modality in the long-term management of CHD patients...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28588399/from-arteries-to-boreholes-steady-state-response-of-a-poroelastic-cylinder-to-fluid-injection
#17
L C Auton, C W MacMinn
The radially outward flow of fluid into a porous medium occurs in many practical problems, from transport across vascular walls to the pressurization of boreholes. As the driving pressure becomes non-negligible relative to the stiffness of the solid structure, the poromechanical coupling between the fluid and the solid has an increasingly strong impact on the flow. For very large pressures or very soft materials, as is the case for hydraulic fracturing and arterial flows, this coupling can lead to large deformations and, hence, to strong deviations from a classical, linear-poroelastic response...
May 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28577265/on-the-injectability-of-free-standing-magnetic-nanofilms
#18
Silvia Taccola, Virginia Pensabene, Toshinori Fujie, Shinji Takeoka, Nicola M Pugno, Virgilio Mattoli
Free-standing films with sub-micrometric thickness, composed of soft polymers and functional nanostructures are promising candidates for many potential applications in the biomedical field, such as reduced port abdominal surgery. In this work, freely suspended poly(L-lactic acid) nanofilms with controlled morphology embedding superparamagnetic iron oxide nanoparticles were fabricated by spin-coating deposition. The mechanical properties of magnetic nanofilms were investigated by Strain-Induced Elastic Buckling Instability for Mechanical Measurements (SIEBIMM) test...
September 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28575817/terahertz-acoustic-phonon-detection-from-a-compact-surface-layer-of-spherical-nanoparticles-powder-mixture-of-aluminum-alumina-and-multi-walled-carbon-nanotube
#19
A Abouelsayed, M R Ebrahim, W El Hotaby, S A Hassan, Emad Al-Ashkar
We present terahertz spectroscopy study on spherical nanoparticles powder mixture of aluminum, alumina, and MWCNTs induced by surface mechanical attrition treatment (SMAT) of aluminum substrates. Surface alloying of AL, Al2O3 0.95% and MWCNTs 0.05% powder mixture was produced during SMAT process, where a compact surface layer of about 200 μm due to ball bombardment was produced from the mixture. Al2O3 alumina powder played a significant role in MWCNTs distribution on surface, those were held in deformation surface cites of micro-cavities due to SMAT process of Al...
May 25, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28574389/-radical-reconstructive-toracoplasty-a-new-method-of-treatment-of-patients-with-choanoid-deformation-of-breast
#20
N Dvaladze
Objective - development of a new method of surgery correction of choanoid deformation of breast, leading to significant improvement of the treatment results of the patients with this pathotology. The new method is being developed based on the analysis of the own long experience of treatment of the patients with choanoid deformation of breast. In total, over than 70 patients have been surged, with the age ranging from 5 to 35. The surgeries have been implemented in Leningrad Pediatric Medical Institute clinic as well as clinics in Georgia...
April 2017: Georgian Medical News
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