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https://www.readbyqxmd.com/read/28815717/partial-inferior-turbinectomy-in-rhinoseptoplasty-has-no-effect-in-quality-of-life-outcomes-a-randomized-clinical-trial
#1
Bianca H de Moura, Raphaella O Migliavacca, Rafaela K Lima, José E L Dolci, Martina Becker, Cássia Feijó, Elisa Brauwers, Michelle Lavinsky-Wolff
OBJECTIVE: Evaluate the impact of endoscopic partial inferior turbinectomy (EPIT) associated with primary rhinoseptoplasty on quality-of-life outcomes (QOL), complications, and surgical duration. STUDY DESIGN: Randomized clinical trial. METHODS: Individuals with nasal obstruction aged ≥ 16 years who were candidates for functional and aesthetics primary rhinoseptoplasty were evaluated from March 2014 through May 2015. Eligible participants were randomly allocated to rhinoseptoplasty with or without EPIT (excision of one-third of the inferior turbinates)...
August 16, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28812933/use-of-bilayer-matrix-wound-dressing-in-the-exenterated-socket
#2
Leon Rafailov, Roger E Turbin, Paul D Langer
To describe the novel use of a bilayer dermal substitute to reconstruct exenterated orbits. A retrospective chart review was performed in the practices of two surgeons (RET and PDL) of all patients who had undergone orbital exenteration between April 2014 and June 2016 and whose subsequent reconstruction included lining the socket with Integra bilayer. Patient demographics, pathologic diagnoses, surgical and post-operative complications, graft integrity, and patient acceptance were recorded. The charts of 7 patients (4 men and 3 women, ages 60-87 years) were reviewed...
August 16, 2017: Orbit
https://www.readbyqxmd.com/read/28809842/noninvasive-sampling-of-mucosal-lining-fluid-for-the-quantification-of-in-vivo-upper-airway-immune-mediator-levels
#3
Helene M Wolsk, Bo L Chawes, Jonathan Thorsen, Jakob Stokholm, Klaus Bønnelykke, Susanne Brix, Hans Bisgaard
This protocol describes noninvasive sampling of undisturbed upper airway mucosal lining fluid. It also details the extraction procedure used prior to the analysis of immune mediators in fluid eluates for the study of the airway topical immune signature, without the need for stimulation procedures (often used by other techniques). The mucosal lining fluid is sampled on a strip of filter paper placed at the anterior part of the inferior turbinate and left for 2 min of absorption. Analytes are eluted from the filter papers, and the extracted protein-based eluates are analyzed by an electrochemiluminescence-based immunoassay, allowing for the high-sensitivity quantification of low- and high-level analytes in the same sample...
August 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28807986/a-turbine-driven-ventilator-improves-adherence-to-advanced-cardiac-life-support-guidelines-during-a-cardiopulmonary-resuscitation-simulation
#4
Scott G Allen, Lara Brewer, Erik S Gillis, Nathan L Pace, Derek J Sakata, Joseph A Orr
BACKGROUND: Research has shown that increased breathing frequency during cardiopulmonary resuscitation is inversely correlated with systolic blood pressure. Rescuers often hyperventilate during cardiopulmonary resuscitation (CPR). Current American Heart Association advanced cardiac life support recommends a ventilation rate of 8 -10 breaths/min. We hypothesized that a small, turbine-driven ventilator would allow rescuers to adhere more closely to advanced cardiac life support (ACLS) guidelines...
August 14, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28804222/chemical-chaperone-of-endoplasmic-reticulum-stress-inhibits-epithelial-mesenchymal-transition-induced-by-tgf-%C3%AE-1-in-airway-epithelium-via-the-c-src-pathway
#5
Heung-Man Lee, Ju-Hyung Kang, Jae-Min Shin, Seoung-Ae Lee, Il-Ho Park
Epithelial-mesenchymal transition (EMT) is a biological process that allows epithelial cells to assume a mesenchymal cell phenotype. EMT is considered as a therapeutic target for several persistent inflammatory airway diseases related to tissue remodeling. Herein, we investigated the role of endoplasmic reticulum (ER) stress and c-Src in TGF-β1-induced EMT. A549 cells, primary nasal epithelial cells (PNECs), and inferior nasal turbinate organ cultures were exposed to 4-phenylbutylic acid (4PBA) or PP2 and then stimulated with TGF-β1...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28795409/upper-airway-surgery-for-obstructive-sleep-apnea-reduces-blood-pressure
#6
Kenny P Pang, Edward B Pang, Kathleen A Pang, Claudio Vicini, Yiong Huak Chan, Brian W Rotenberg
OBJECTIVES/HYPOTHESIS: To evaluate if upper airway surgery reduces blood pressure in patients with obstructive sleep apnea (OSA). STUDY DESIGN: Prospective series. METHODS: A prospective series of 112 consecutive OSA patients with hypertension (HTN). All patients were > 18 years old, respiratory disturbance index >5, all levels of apnea-hypopnea index (AHI), with a history of HTN treated with medication for at least 6 months. Surgical procedures included septoplasty, turbinate reduction, palate surgery, and tongue base reduction...
August 10, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28790790/an-observational-study-on-the-effects-of-aviation-turbine-fuel-and-lubricants-on-the-skin-of-indian-air-force-ground-crew-in-flying-stations
#7
S Radhakrishnan, Ajay Chopra, Debdeep Mitra, R Gnanasekaran, R Kanagaraj
BACKGROUND: Ground crew of the Air Force routinely handle aviation turbine fuel (ATF) and lubricants and a need was felt to study the adverse effects of these substances on their skin so that remedial measures could be taken to prevent these adverse effects. METHODS: A multi-centric, cross-sectional, observational study was performed at three Air Force flying stations. 109 ground crew members of the Indian Air Force (IAF) who were in direct contact with ATF and lubricants were screened for dermatological manifestations on exposed areas...
July 2017: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28774082/thermal-shock-and-oxidation-behavior-of-hipims-tialn-coatings-grown-on-ti-48al-2cr-2nb-intermetallic-alloy
#8
Claudio Badini, Silvia M Deambrosis, Elisa Padovano, Monica Fabrizio, Oxana Ostrovskaya, Enrico Miorin, Giuseppe C D'Amico, Francesco Montagner, Sara Biamino, Valentina Zin
A High Power Impulse Magnetron Sputtering (HiPIMS) method for depositing TiAlN environmental barrier coatings on the surface of Ti-48Al-2Cr-2Nb alloy was developed in view of their exploitation in turbine engines. Three differently engineered TiAlN films were processed and their performance compared. Bare intermetallic alloy coupons and coated specimens were submitted to thermal cycling under oxidizing atmosphere up to 850 °C or 950 °C, at high heating and cooling rates. For this purpose, a burner rig able to simulate the operating conditions of the different stages of turbine engines was used...
November 25, 2016: Materials
https://www.readbyqxmd.com/read/28774050/freckle-defect-formation-near-the-casting-interfaces-of-directionally-solidified-superalloys
#9
Jianping Hong, Dexin Ma, Jun Wang, Fu Wang, Baode Sun, Anping Dong, Fei Li, Andreas Bührig-Polaczek
Freckle defects usually appear on the surface of castings and industrial ingots during the directional solidification process and most of them are located near the interface between the shell mold and superalloys. Ceramic cores create more interfaces in the directionally solidified (DS) and single crystal (SX) hollow turbine blades. In order to investigate the location of freckle occurrence in superalloys, superalloy CM247 LC was directionally solidified in an industrial-sized Bridgman furnace. Instead of ceramic cores, Alumina tubes were used inside of the casting specimens...
November 16, 2016: Materials
https://www.readbyqxmd.com/read/28773064/a-combined-high-and-low-cycle-fatigue-model-for-life-prediction-of-turbine-blades
#10
Shun-Peng Zhu, Peng Yue, Zheng-Yong Yu, Qingyuan Wang
Combined high and low cycle fatigue (CCF) generally induces the failure of aircraft gas turbine attachments. Based on the aero-engine load spectrum, accurate assessment of fatigue damage due to the interaction of high cycle fatigue (HCF) resulting from high frequency vibrations and low cycle fatigue (LCF) from ground-air-ground engine cycles is of critical importance for ensuring structural integrity of engine components, like turbine blades. In this paper, the influence of combined damage accumulation on the expected CCF life are investigated for turbine blades...
June 26, 2017: Materials
https://www.readbyqxmd.com/read/28773035/incipient-fault-detection-for-rolling-element-bearings-under-varying-speed-conditions
#11
Lang Xue, Naipeng Li, Yaguo Lei, Ningbo Li
Varying speed conditions bring a huge challenge to incipient fault detection of rolling element bearings because both the change of speed and faults could lead to the amplitude fluctuation of vibration signals. Effective detection methods need to be developed to eliminate the influence of speed variation. This paper proposes an incipient fault detection method for bearings under varying speed conditions. Firstly, relative residual (RR) features are extracted, which are insensitive to the varying speed conditions and are able to reflect the degradation trend of bearings...
June 20, 2017: Materials
https://www.readbyqxmd.com/read/28772934/a-re-evaluation-of-the-causes-of-deformation-in-1cr-1mo-0-25v-steel-for-turbine-rotors-and-shafts-based-on-iso-thermal-plots-of-the-wilshire-equation-and-the-modelling-of-batch-to-batch-variation
#12
Mark Evans
The aims of this paper were to: (a) demonstrate how iso-thermal plots of the Wilshire equation can be used to identify the correct structure of this equation (which in turn enables a meaningful description of the creep mechanism involved in deformation to be made); and (b) show how a generalized specification of batch to batch variation could produce less conservative predictions of the time to failure associated with a given degree of risk. Such predictions were obtained using maximum likelihood estimation of the parameters of a generalised F distribution...
May 24, 2017: Materials
https://www.readbyqxmd.com/read/28772873/a-new-energy-critical-plane-damage-parameter-for-multiaxial-fatigue-life-prediction-of-turbine-blades
#13
Zheng-Yong Yu, Shun-Peng Zhu, Qiang Liu, Yunhan Liu
As one of fracture critical components of an aircraft engine, accurate life prediction of a turbine blade to disk attachment is significant for ensuring the engine structural integrity and reliability. Fatigue failure of a turbine blade is often caused under multiaxial cyclic loadings at high temperatures. In this paper, considering different failure types, a new energy-critical plane damage parameter is proposed for multiaxial fatigue life prediction, and no extra fitted material constants will be needed for practical applications...
May 8, 2017: Materials
https://www.readbyqxmd.com/read/28772453/idealized-vs-realistic-microstructures-an-atomistic-simulation-case-study-on-%C3%AE-%C3%AE-microstructures
#14
Aruna Prakash, Erik Bitzek
Single-crystal Ni-base superalloys, consisting of a two-phase γ/ γ ' microstructure, retain high strengths at elevated temperatures and are key materials for high temperature applications, like, e.g., turbine blades of aircraft engines. The lattice misfit between the γ and γ ' phases results in internal stresses, which significantly influence the deformation and creep behavior of the material. Large-scale atomistic simulations that are often used to enhance our understanding of the deformation mechanisms in such materials must accurately account for such misfit stresses...
January 23, 2017: Materials
https://www.readbyqxmd.com/read/28772394/thermo-mechanical-fatigue-crack-growth-of-rr1000
#15
Christopher John Pretty, Mark Thomas Whitaker, Steve John Williams
Non-isothermal conditions during flight cycles have long led to the requirement for thermo-mechanical fatigue (TMF) evaluation of aerospace materials. However, the increased temperatures within the gas turbine engine have meant that the requirements for TMF testing now extend to disc alloys along with blade materials. As such, fatigue crack growth rates are required to be evaluated under non-isothermal conditions along with the development of a detailed understanding of related failure mechanisms. In the current work, a TMF crack growth testing method has been developed utilising induction heating and direct current potential drop techniques for polycrystalline nickel-based superalloys, such as RR1000...
January 4, 2017: Materials
https://www.readbyqxmd.com/read/28749846/three-dimensional-radiologic-study-on-index-measurement-of-endonasal-endoscopic-optic-nerve-decompression
#16
Yao Zhao, Haobo Duan, Jianming Liu, Kailiang Cheng, Yingying Han, Youqiong Li
OBJECTIVE: To provide the radiologic basis for the clinical application of endonasal endoscopic optic nerve decompression (EEOND). METHODS: CTA images were used to observe the optic canal (OC) and related structures of 60 patients (120 sides) with normal nasal, paranasal sinuses, OC, and other related structures. RESULTS: Optic canal could be classified as: the canal (10 sides, 8.33%), the semicanal (25 sides, 20.83%), the impression (49 sides, 40...
July 26, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28747230/full-length-genome-sequence-analysis-of-enzootic-nasal-tumor-virus-isolated-from-goats-in-china
#17
Yapeng He, Qi Zhang, Jing Wang, Man Zhou, Mingzhe Fu, Xingang Xu
BACKGROUND: Enzootic nasal tumor virus (ENTV) is a betaretrovirus of sheep (ENTV-1) and goats (ENTV-2) associated with neoplastic transformation of epithelial cells of the ethmoid turbinate. Confirmation of the role of ENTV in the pathogenesis of enzootic nasal adenocarcinoma (ENA) has yet to be resolved due to the inability to culture the virus. Very little is known about the prevalence of this disease, particularly in China. METHODS: To evaluate the genetic diversity of ENTV-2 from Shaanxi province of China, the complete genome sequence of four isolates from Shaanxi province was determined by RT-PCR...
July 26, 2017: Virology Journal
https://www.readbyqxmd.com/read/28726745/dual-source-linear-energy-prediction-line-p-model-in-the-context-of-wsns
#18
Faisal Ahmed, Gert Tamberg, Yannick Le Moullec, Paul Annus
Energy harvesting technologies such as miniature power solar panels and micro wind turbines are increasingly used to help power wireless sensor network nodes. However, a major drawback of energy harvesting is its varying and intermittent characteristic, which can negatively affect the quality of service. This calls for careful design and operation of the nodes, possibly by means of, e.g., dynamic duty cycling and/or dynamic frequency and voltage scaling. In this context, various energy prediction models have been proposed in the literature; however, they are typically compute-intensive or only suitable for a single type of energy source...
July 20, 2017: Sensors
https://www.readbyqxmd.com/read/28721360/technical-data-for-concentrated-solar-power-plants-in-operation-under-construction-and-in-project
#19
Ugo Pelay, Lingai Luo, Yilin Fan, Driss Stitou, Mark Rood
This article presents technical data for concentrated solar power (CSP) plants in operation, under construction and in project all over the world in the form of tables. These tables provide information about plants (e.g., name of the CSP plant, country of construction, owner of the plant, aim of the plant) and their technical characteristics (e.g., CSP technology, solar power, area of the plant, presence and type of hybridization system, electricity cost, presence and type of TES, power cycle fluid, heat transfer fluid, operating temperature, operating pressure, type of turbine, type and duration of storage, etc...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28718208/quantification-of-nasal-airflow-resistance-in-english-bulldogs-using-computed-tomography-and-computational-fluid-dynamics
#20
Eric T Hostnik, Brian A Scansen, Rachel Zielinski, Samir N Ghadiali
Stenotic nares, edematous intranasal turbinates, mucosal swelling, and an elongated, thickened soft palate are common sources of airflow resistance for dogs with brachycephalic airway syndrome. Surgery has focused on enlarging the nasal apertures and reducing tissue of the soft palate. However, objective measures of surgical efficacy are lacking. Twenty-one English bulldogs without previous surgery were recruited for this prospective, pilot study. Computed tomography was performed using conscious sedation and without endotracheal intubation using a 128 multidetector computed tomography scanner...
July 17, 2017: Veterinary Radiology & Ultrasound
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