Resistance To The Airflow
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Investigation on the nasal airflow characteristics of anterior nasal cavity stenosis
We used a computational fluid dynamics (CFD) model to study the inspiratory airflow profiles of patients with anterior nasal cavity stenosis who underwent curative surgery, by comparing pre- and postoperative airflow characteristics. Twenty patients with severe anterior nasal cavity stenosis, including one case of bilateral stenosis, underwent computed tomog
Braz J Med Biol Res. Publicado em: 01/08/2016
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2. Evaluation of multidrug resistance-1 gene C>T polymorphism frequency in patients with asthma
OBJECTIVES:Asthma is a chronic inflammatory lung disease characterized by bronchial hyperresponsiveness and airflow obstruction. Genetic and oxidative stress factors, in addition to pulmonary and systemic inflammatory processes, play a pivotal role in the pathogenesis of asthma. The products of the multidrug resistance-1 gene protect lung tissue from oxidati
Clinics. Publicado em: 2015-10
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3. Correlação da composição corporal com a função pulmonar e com a força muscular respiratória em indivíduos com a Trissomia 21 no Distrito Federal
Introduction: Overweight and respiratory malfunctions are frequently found in Trysomy 21 bearers. Such disturbances are potentially able to lead to conditions which endanger the quality of life of affected individuals, thus aggravating their physical health and excluding them from social interaction. Purpose: the purpose of this academic essay was to investi
Publicado em: 2009
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4. Efeitos dos filtros trocadores de calor e umidade sobre a mecânica respiratória / Effects of the heat and moiusture exchangers filters on respiratory mechanics
Os filtros HME são dispositivos que combinam propriedades de umidificação com propriedades de retenção bacterianas através de membranas que, desta forma, protegem pacientes mecanicamente ventilados. Objetivou-se analisar, em um modelo experimental, os efeitos de diferentes marcas de filtros HME, em diferentes tempos de uso, sobre a mecânica respirató
Publicado em: 2008
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5. Laryngeal resistance in individuals with marginal velopharyngeal closure / Resistência laríngea em indivíduos com fechamento velofaríngeo marginal
Objective: To investigate whether patients with marginal velopharyngeal dysfunction modify the laryngeal resistance as a strategy to achieve complete velopharyngeal closure. Design: Prospective analysis. Setting: Laboratory of Physiology at the Hospital for Rehabilitation of Craniofacial Anomalies - USP (HRAC-USP). Participants: 19 patients with repaired cle
Publicado em: 2007
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6. Ventilação natural e códigos de obras: uma análise das tipologias de aberturas nos edifícios de escritório em Maceió/AL
In office buildings located on hot humid climate areas, the architectonical typology could improve the regional winds entrance and minimize the energy consumption. The increase of ventilation inside the rooms depends on the architectonical typology adopted and the specifications related on the rooms openings. The rooms openings allow or make difficult to dis
Publicado em: 2006
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7. Projeto de dissipadores de calor aletados considerando o efeito do desvio do escoamento
The thermal design of air cooled heat sinks assembled on top of microprocessors is considered in this work. The heat sinks are assumed to be made longitudinal fins of rectangular cross section with a forced airflow. The cross section of the duct may be larger than of the heat sink, so that there is a bypass of the airflow between the heat sink and the walls
Publicado em: 1998
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8. Controlled trial of respiratory muscle training in chronic airflow limitation.
BACKGROUND: Whether respiratory muscle training is of benefit to patients with chronic airflow limitation is controversial. The objective of the study was to determine the effect of resistance breathing training on physiological and functional measures in patients with chronic airflow obstruction. METHODS: The design was a randomised, double blind, controlle
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9. Lung reflexes and nasal vascular resistance in the anaesthetized dog.
1. In pentobarbitone-anaesthetized dogs the nasal vasculature was perfused on both sides, and nasal vascular and airflow resistances were measured together with blood pressure, heart rate and tidal airflow. 2. Capsaicin was injected intravenously to stimulate lung C-fibre receptors, and veratrine to stimulate pulmonary stretch receptors and cardiac receptors
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10. Decrease of resistance to air flow with nasal strips as measured with the airflow perturbation device
BioMed Central.
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11. Comparison of the respiratory responses to external resistive loading and bronchoconstriction.
The effects of resistive loads applied at the mouth were compared to the effects of bronchospasm on ventilation, respiratory muscle force (occlusion pressure), and respiratory sensations in 6 normal and 11 asthmatic subjects breathing 100% O2. External resistive loads ranging from 0.65 to 13.33 cm H2O/liter per s were applied during both inspiration and expi
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12. Effects of hypercapnia and hypoxia on nasal vasculature and airflow resistance in the anaesthetized dog.
The experiments were performed on anaesthetized dogs which breathed spontaneously or were artificially ventilated and paralysed. The spontaneous nasal arterial blood flow was measured on one side of the nose while nasal vascular resistance was determined on the other side simultaneously. Nasal arterial blood flow was measured by means of an electromagnetic f