Pressure Low
Mostrando 1-12 de 1988 artigos, teses e dissertações.
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1. Rotational Steady Waves in a Low-pressure Region
ABSTRACT Nonlinear steady rotational waves in a low-pressure region are investigated. The problem is formulated in a simplified canonical domain through the use of a conformal mapping, which flattens the free surface. Steady waves are computed numerically using a Newton’s method and classified into three types. Besides, our results indicate that there is a
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. Prone ventilation in intubated COVID-19 patients: a systematic review and meta-analysis
Abstract Background The efficacy and safety profiles of prone ventilation among intubated Coronavirus Disease 2019 (COVID-19) patients remain unclear. The primary objective was to examine the effect of prone ventilation on the ratio of arterial partial pressure of oxygen to fraction of inspired oxygen (PaO2/FiO2) in intubated COVID-19 patients. Methods Dat
Brazilian Journal of Anesthesiology. Publicado em: 2022
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3. Cardiovascular Risk Factors in Haul Truck Operators of the Mining Sector Working a Rotational Schedule
Abstract Background: Due to the growing concern about work-related social and health aspects, occupational health and safety has become relevant. Objective: This work aims to develop a model to assist cardiovascular risk management in a team of haul truck operators, who work in rotating shifts at a mining company in Brazil. Methods: This longitudinal stud
International Journal of Cardiovascular Sciences. Publicado em: 2022
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4. Ring Fracture of Brazilian Aortic Valve Bioprostheses Using Non-Compliant High-Pressure Transcatheter Balloon, an Ex Vivo Test
ABSTRACT Introduction: Aortic valve bioprostheses ring fracture in valve-in-valve procedures has shown low complication rates and presents as an option in the treatment of patients at high risk for conventional surgery, avoiding high transvalvular gradients, which are associated with increased mortality. Some prostheses available in the market cannot be fra
Brazilian Journal of Cardiovascular Surgery. Publicado em: 2022
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5. Orthostatic changes in blood pressure and survival in elderly cardiopaths
SUMMARY OBJECTIVE: The objective of this study was to analyze the association between orthostatic changes in blood pressure and mortality in elderly cardiopath patients. METHODS: A cohort of 455 elderly cardiopath patients, monitored at a referral outpatient cardiology clinic in Pernambuco, Brazil, from October 2015 to July 2018. The exposure groups were f
Revista da Associação Médica Brasileira. Publicado em: 2022
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6. Wideband Acoustic Absorbance in Otosclerosis: Does Stapedotomy Restore Normal Tympanic Cavity Function?
Abstract Introduction Otosclerosis is characterized by the fixation of the stapes to the oval window, thereby impairing acoustic signal absorbance. A commonly used surgical technique for improving hearing in cases of otosclerosis is stapedotomy. However, it is unclear whether this surgery restores all the physical characteristics of the tympano-ossicular sy
International Archives of Otorhinolaryngology. Publicado em: 2022
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7. In utero myelomeningocele repair and high-risk bladder pattern. a prospective study
ABSTRACT Objectives High-risk bladder pattern can be defined by Urodynamic Evaluation (UE) as overactive bladder with detrusor leak point pressure higher than 40 cmH2O and/or higher filling pressures also above 40 cmH2O. We wanted to evaluate response to treatment in myelomeningocele patients operated in utero in this subgroup. Patients and Methods From ou
International braz j urol. Publicado em: 2022
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8. Physical Activity and Cardiovascular Risk Factors in Children: a Meta-Analysis Update
Abstract Background Obesity and overweight in childhood can increase the risk of developing cardiovascular disease throughout live. Objectives This study provides an update of a meta-analysis of randomized clinical trials (RCT) published in 2014, to assess the effects of physical activity interventions on preventing cardiovascular risk factors in childho
International Journal of Cardiovascular Sciences. Publicado em: 2022
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9. Development of a ceramic membrane for emulsion water-diesel treatment
Abstract The purpose of this study was the development of a low-cost ceramic tubular membrane, using inexpensive materials, namely natural clay, and graphite as a porogenic agent. Such a low-cost membrane can be used as filters or porous supports for the preparation of multilayer ceramic membranes. Extrusion was used as a shape-forming method for this purpos
Cerâmica. Publicado em: 2022
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10. Gas permeability and compressive strength evaluation of porous Al2O3 supported membrane
Abstract The aim was to investigate the feasibility of using a device to characterize permeability in porous substrates with low gas flux. Al2O3 supports were prepared by dry pressing using 1 to 3 wt% of polyethylene glycol (PEG) as a pore-forming agent. The green body was partially sintered at 1300 ºC. CO2 gas was used to measure both the pressure loss and
Cerâmica. Publicado em: 2022
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11. Braden scale has low reliability in different patients under care in intensive care unit
SUMMARY OBJECTIVE: The aim of this study was to assess the inter-reliability of the Braden scale and its subscales for different patients assisted in the intensive care unit. We hypothesized that the Braden scale has low reliability in different populations. METHODS: This reliability study involved the Braden scale in intensive care unit of a hospital. A t
Revista da Associação Médica Brasileira. Publicado em: 2022
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12. SYNTHESIS OF GLYCEROL-FLUORINATED TRIAZOLE DERIVATIVES AND EVALUATION OF THEIR FUNGICIDAL ACTIVITY
The control of fungal species in agriculture is mainly conducted with the use of contact or systemic fungicides. However, environmental and human health concerns and increased resistance of fungal species to existing fungicides have increased the pressure on researchers to find new active ingredients for fungal control which present low toxicity to non-targe
Química Nova. Publicado em: 2022