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https://www.readbyqxmd.com/read/29336124/masking-treatment-and-its-effect-on-tinnitus-parameters
#1
Ismail Aytac, Elif Baysal, Secaattin Gulsen, Koray Tumuklu, Cengiz Durucu, Lütfi Semih Mumbuc, MUzaffer Kanlikama
OBJECTIVE: Tinnitus is described as the perception of sound without any external acoustic stimulation. Any pathology of auditory pathways or any system of the human body may result with tinnitus. The pathophysiology of tinnitus accompanying the disorders of auditory system is not fully understood and there is not any particular effective treatment method has been specified. Tinnitus masking therapy has been reported as an effective treatment modality in the treatment of tinnitus. In this study, the results of tinnitus masking treatment on the parameters were evaluated prospectively...
December 1, 2017: International Tinnitus Journal
https://www.readbyqxmd.com/read/29330643/antihypertensive-medication-and-dementia-risk-in-older-adult-african-americans-with-hypertension-a-prospective-cohort-study
#2
Michael D Murray, Hugh C Hendrie, Kathleen A Lane, Mengjie Zheng, Roberta Ambuehl, Shanshan Li, Frederick W Unverzagt, Christopher M Callahan, Sujuan Gao
BACKGROUND: African Americans are especially at risk of hypertension and dementia. Antihypertensive medications reduce the risk of cardiovascular events, but may also reduce the risk of dementia. OBJECTIVE: To assess the longitudinal effects of antihypertensive medications and blood pressure on the onset of incident dementia in a cohort of African Americans. DESIGN: Prospective cohort. PARTICIPANTS: 1236 community-dwelling patients from an inner-city public health care system, aged 65 years and older, with a history of hypertension but no history of dementia, and who had at least three primary care visits and a prescription filled for any medication...
January 12, 2018: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/29328788/the-role-of-elastomeric-pumps-in-postoperative-analgesia-in-orthopaedics-and-factors-affecting-their-flow-rate
#3
Anthony Andreas Theodorides
Elastomeric pumps are mechanical devices composed of an elastomeric balloon reservoir into which the drug to be infused is stored, a protective casing (used by some manufacturers), a flow controller and a wound catheter. In orthopaedics they are used to provide continuous local infiltration analgesia. In this way patients rely less on other routes of analgesia and thus avoid their systemic side effects. Studies have shown good response to analgesia with these pumps for the first 24 hours but their benefit is not as clear at 48 and 72 hours...
December 2017: Journal of Perioperative Practice
https://www.readbyqxmd.com/read/29320155/transparent-and-waterproof-ionic-liquids-based-fibers-for-highly-durable-multifunctional-sensors-and-strain-insensitive-stretchable-conductors
#4
Song Chen, Haizhou Liu, Shuqi Liu, Pingping Wang, Songshan Zeng, Luyi Sun, Lan Liu
Ionic liquids (ILs) are regarded as ideal components in the next generation of strain sensors because their ultralow modulus can commendably circumvent or manage the mechanical mismatch in traditional strain sensors. In addition to strain sensors, stretchable conductors with strain-insensitive conductance are also indispensable in artificial systems for connecting and transporting electrons, similar to the function of blood vessels in the human body. In this work, two types of ILs-based conductive fibers were fabricated by developing hollow fibers with specific micro-scale channels which were then filled with ILs...
January 10, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29317109/the-role-of-the-2011-patients-rights-in-cross-border-health-care-directive-in-shaping-seven-national-health-systems-looking-beyond-patient-mobility
#5
Natasha Azzopardi-Muscat, Rita Baeten, Timo Clemens, Triin Habicht, Ilmo Keskimäki, Iwona Kowalska-Bobko, Anna Sagan, Ewout van Ginneken
Reports on the implementation of the Directive on the application of Patients' Rights in Cross-border Healthcare indicate that it had little impact on the numbers of patients seeking care abroad. We set out to explore the effects of this directive on health systems in seven EU Member States. Key informants in Belgium, Estonia, Finland, Germany, Malta, Poland and The Netherlands filled out a structured questionnaire. Findings indicate that the impact of the directive varied between countries and was smaller in countries where a large degree of adaptation had already taken place in response to the European Court of Justice Rulings...
January 4, 2018: Health Policy
https://www.readbyqxmd.com/read/29317060/fibromyalgia-and-unexplained-widespread-pain-the-idiopathic-cerebrospinal-pressure-dysregulation-hypothesis
#6
M Hulens, W Dankaerts, I Stalmans, A Somers, G Vansant, R Rasschaert, F Bruyninckx
Fibromyalgia (FM) is a debilitating, widespread pain disorder that is assumed to originate from inappropriate pain processing in the central nervous system. Psychological and behavioral factors are both believed to underlie the pathogenesis and complicate the treatment. This hypothesis, however, has not yet been sufficiently supported by scientific evidence and accumulating evidence supports a peripheral neurological origin of the symptoms. We postulate that FM and several unexplained widespread pain syndromes are caused by chronic postural idiopathic cerebrospinal hypertension...
January 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29289209/a-sealable-ultrathin-window-sample-cell-for-the-study-of-liquids-by-means-of-soft-x-ray-spectroscopy
#7
D Grötzsch, C Streeck, C Nietzold, W Malzer, I Mantouvalou, A Nutsch, P Dietrich, W Unger, B Beckhoff, B Kanngießer
A new sample cell concept for the analysis of liquids or solid-liquid interfaces using soft X-ray spectroscopy is presented, which enables the complete sealing of the cell as well as the transport into vacuum via, for example, a load-lock system. The cell uses pressure monitoring and active as well as passive pressure regulation systems, thereby facilitating the full control over the pressure during filling, sealing, evacuation, and measurement. The cell design and sample preparation as well as the crucial sealing procedure are explained in detail...
December 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29251570/stronger-at-depth-jamming-grippers-as-deep-sea-sampling-tools
#8
Stephen Licht, Everett Collins, Manuel Lopes Mendes, Christopher Baxter
In this work we experimentally demonstrate (a) that the holding strength of universal jamming grippers increases as a function of the jamming pressure to greater than three atmospheres, and (b) that jamming grippers can be operated in the deep sea in ambient pressures exceeding one hundred atmospheres, where such high jamming pressures can be readily achieved. Laboratory experiments in a pressurized, water-filled test cell are used to measure the holding force of a "universal" style jamming gripper as a function of the pressure difference between internal membrane pressure and ambient pressure...
December 2017: Soft Robotics
https://www.readbyqxmd.com/read/29246267/autonomic-nervous-system-functioning-related-to-nocturnal-sleep-in-patients-with-chronic-fatigue-syndrome-compared-to-tired-controls
#9
Maija Orjatsalo, Anniina Alakuijala, Markku Partinen
STUDY OBJECTIVES: Autonomic nervous system (ANS) dysfunction is common in chronic fatigue syndrome (CFS). One of the main complaints in CFS is unrefreshing sleep. We aimed to study the nocturnal cardiac ANS in different sleep stages in patients filling the 2015 Institute of Medicine CFS diagnostic criteria. METHODS: In this case series study, the nocturnal heart rate variability and blood pressure (BP) variables in polysomnography were studied in groups of patients with CFS (n = 8) and tired controls (n = 8) aged 16-49 years...
December 13, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29245186/endothelial-dysfunction-in-early-systemic-lupus-erythematosus-patients-and-controls-without-previous-cardiovascular-events
#10
Mara Taraborelli, Edoardo Sciatti, Ivano Bonadei, Vincenzo Terlizzi, Micaela Fredi, Roberta Zani, Giovanni Cancarini, Angela Tincani, Franco Franceschini, Enrico Vizzardi, Ilaria Cavazzana
OBJECTIVES: To assess the prevalence and risk factors for endothelial dysfunction detected by peripheral artery tonometry in systemic lupus erythematosus patients with early disease without cardiovascular disease and risk factors. METHODS: All the consecutive adult lupus patients, with a disease duration less than 5 years, seen in our Hospital from December 2014 to March 2016 were considered. We excluded patients with any history of cardiovascular disease or risk factors possibly affecting peripheral artery tonometry...
December 15, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/29202543/-experts-consensus-on-the-management-of-the-right-heart-function-in-critically-ill-patients
#11
X T Wang, D W Liu, H M Zhang, Y Long, X D Guan, H B Qiu, K J Yu, J Yan, H Zhao, Y Q Tang, X Ding, X C Ma, W Du, Y Kang, B Tang, Y H Ai, H W He, D C Chen, H Chen, W Z Chai, X Zhou, N Cui, H Wang, X Rui, Z J Hu, J G Li, Y Xu, Y Yang, B Ouyan, H Y Lin, Y M Li, X Y Wan, R L Yang, Y Z Qin, Y G Chao, Z Y Xie, R H Sun, Z Y He, D F Wang, Q Q Huang, D P Jiang, X Y Cao, R G Yu, X Wang, X K Chen, J F Wu, L N Zhang, M G Yin, L X Liu, S W Li, Z J Chen, Z Luo
To establish the experts consensus on the right heart function management in critically ill patients. The panel of consensus was composed of 30 experts in critical care medicine who are all members of Critical Hemodynamic Therapy Collaboration Group (CHTC Group). Each statement was assessed based on the GRADE (Grading of Recommendations Assessment, Development, and Evaluation) principle. Then the Delphi method was adopted by 52 experts to reassess all the statements. (1) Right heart function is prone to be affected in critically illness, which will result in a auto-exaggerated vicious cycle...
December 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/29197778/recovery-of-mixed-volatile-fatty-acids-from-anaerobically-fermented-organic-wastes-by-vapor-permeation-membrane-contactors
#12
Senem Aydin, Hatice Yesil, A Evren Tugtas
Volatile fatty acids (VFAs) are attractive compounds in renewable based bio-refinery industries and can be produced through anaerobic digestion of organic wastes. Nevertheless, the recovery of VFAs from anaerobically digested organic wastes is the bottleneck of the resource recovery. In this study, VFA recovery from synthetic VFA solutions and fermented organic wastes via air-filled and tertiary amine extractant-filled PTFE membranes through vapor pressure membrane contactors (VPMC) was investigated. Acetic acid was recovered with greater than 45% efficiency in all the fermented wastes...
November 22, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29187621/flight-metabolic-rate-of-locusta-migratoria-in-relation-to-oxygen-partial-pressure-in-atmospheres-of-varying-diffusivity-and-density
#13
Edward P Snelling, Rebecca Duncker, Karl K Jones, Erinn P Fagan-Jeffries, Roger S Seymour
Flying insects have the highest mass-specific metabolic rate of all animals. Oxygen is supplied to the flight muscles by a combination of diffusion and convection along the internal air-filled tubes of the tracheal system. This study measured maximum flight metabolic rate (FMR) during tethered flight in the migratory locust Locusta migratoria under varying oxygen partial pressure (PO2 ) in background gas mixtures of nitrogen (N2), sulfur hexafluoride (SF6) and helium (He), to vary O2 diffusivity and gas mixture density independently...
December 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29176452/collagen-based-fillers-as-alternatives-to-cyanoacrylate-glue-for-the-sealing-of-large-corneal-perforations
#14
Chameen Samarawickrama, Ayan Samanta, Aneta Liszka, Per Fagerholm, Oleksiy Buznyk, May Griffith, Bruce Allan
PURPOSE: To describe the use of collagen-based alternatives to cyanoacrylate glue for the sealing of acute corneal perforations. METHODS: A collagen analog comprising a collagen-like peptide conjugated to polyethylene glycol (CLP-PEG) and its chemical crosslinker were tested for biocompatibility. These CLP-PEG hydrogels, which are designed to act as a framework for corneal tissue regeneration, were then tested as potential fillers in ex vivo human corneas with surgically created full-thickness perforations...
November 22, 2017: Cornea
https://www.readbyqxmd.com/read/29176374/intraoperative-vasoplegia-methylene-blue-to-the-rescue
#15
Sharon L McCartney, Lorent Duce, Kamrouz Ghadimi
PURPOSE OF REVIEW: To evaluate the efficacy, dosing, and safety of methylene blue (MTB) in perioperative vasoplegic syndrome (VS). RECENT FINDINGS: Vasoplegic syndrome is a state of persistent hypotension with elevated cardiac output, low filling pressures, and low systemic vascular resistance (SVR). It occurs in up to 25% of patients undergoing cardiac surgery with cardiopulmonary bypass, can last up to 72 h, and is associated with a high mortality rate. MTB has been found to increase SVR and decrease vasopressor requirements in vasoplegic syndrome by inhibiting nitric oxide synthase, thus limiting the generation of nitric oxide, while inhibiting activation of soluble guanylyl cyclase and preventing vasodilation...
February 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29171669/volume-responsiveness-assessed-by-passive-leg-raising-and-a-fluid-challenge-a-critical-review-focused-on-mean-systemic-filling-pressure
#16
K Cooke, R Sharvill, S Sondergaard, A Aneman
This review applied cardiovascular principles relevant to the physiology of venous return in interpreting studies on the utility of a passive leg-raising manoeuvre to identify patients who do (responders) or do not respond to a subsequent intravenous volume challenge with an increase in cardiac output. Values for cardiac output, mean arterial and central venous pressure, and the calculated cardiovascular variables mean systemic filling pressure analogue, heart efficiency, cardiac power indexed by volume state and volume efficiency, before and after passive leg raising as well as before and after fluid volume challenge, were extracted from published studies...
November 24, 2017: Anaesthesia
https://www.readbyqxmd.com/read/29141964/acute-decompensated-pulmonary-hypertension
#17
Laurent Savale, Jason Weatherald, Xavier Jaïs, Constance Vuillard, Athénaïs Boucly, Mitja Jevnikar, David Montani, Olaf Mercier, Gerald Simonneau, Elie Fadel, Olivier Sitbon, Marc Humbert
Acute right heart failure in chronic precapillary pulmonary hypertension is characterised by a rapidly progressive syndrome with systemic congestion resulting from impaired right ventricular filling and/or reduced right ventricular flow output. This clinical picture results from an imbalance between the afterload imposed on the right ventricle and its adaptation capacity. Acute decompensated pulmonary hypertension is associated with a very poor prognosis in the short term. Despite its major impact on survival, its optimal management remains very challenging for specialised centres, without specific recommendations...
December 31, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/29131671/in-vitro-evaluation-of-evacuated-blood-collection-tubes-as-a-closed-suction-surgical-drain-reservoir
#18
Brian Heiser, E B Okrasinski, Rebecca Murray, Kelly McCord
The initial negative pressures of evacuated blood collection tubes (EBCT) and their in vitro performance as a rigid closed-suction surgical drain (CSSD) reservoir has not been evaluated in the scientific literature despite being described in both human and veterinary texts and journals. The initial negative pressures of EBCT sized 3, 6, 10, and 15 mL were measured and the stability of the system monitored. The pressure-to-volume curve as either air or water was added and maximal filling volumes were measured...
November 13, 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/29127237/metaboreflex-mediated-hemodynamic-abnormalities-in-individuals-with-coronary-artery-disease-without-overt-signs-or-symptoms-of-heart-failure
#19
Sara Magnani, Silvana Roberto, Gianmarco Sainas, Raffaele Milia, Girolamo Palazzolo, Lucia Cugusi, Virginia Pinna, Azzurra Doneddu, Seyed Alireza Hosseini Kakhak, Filippo Tocco, Giuseppe Mercuro, Antonio Crisafulli
This study was devised to investigate the effect of coronary artery disease (CAD) without overt signs of heart failure on the cardiovascular responses to muscle metaboreflex activation. We hypothesized that any CAD-induced pre-clinical systolic and/or diastolic dysfunction could impair hemodynamic response to the metaboreflex test. Twelve males diagnosed with CAD without any sign or symptoms of heart failure and 11 age-matched healthy controls (CTL) participated in the study. Subjects performed a post-exercise muscle ischemia (PEMI) test to activate the metaboreflex...
November 10, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29120621/chemical-substitution-induced-and-competitive-formation-of-6h-and-3c-perovskite-structures-in-ba3-xsrxznsb2o9-the-coexistence-of-two-perovskites-in-0-3-%C3%A2-x-%C3%A2-1-0
#20
Jing Li, Pengfei Jiang, Wenliang Gao, Rihong Cong, Tao Yang
6H and 3C perovskites are important prototype structures in materials science. We systemically studied the structural evolution induced by the Sr(2+)-to-Ba(2+) substitution to the parent 6H perovskite Ba3ZnSb2O9. The 6H perovskite is only stable in the narrow range of x ≤ 0.2, which attributes to the impressibility of [Sb2O9]. The preference of 90° Sb-O-Sb connection and the strong Sb(5+)-Sb(5+) electrostatic repulsion in [Sb2O9] are competitive factors to stabilize or destabilize the 6H structure when chemical pressure was introduced by Sr(2+) incorporation...
November 9, 2017: Inorganic Chemistry
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