Pulmonary Gas Exchange
Mostrando 1-12 de 123 artigos, teses e dissertações.
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1. Melatonin effects on pulmonary tissue in the experimental model of Hepatopulmonary Syndrome
RESUMO Objetivo: Avaliar as alterações pulmonares de animais com Síndrome Hepatopulmonar (SHP), submetidos à ligadura de ducto biliar (LDB), bem como o efeito antioxidante da Melatonina (MEL). Métodos: Dezesseis ratos machos da espécie Wistar, divididos em quatro grupos: Sham, Grupo LDB, Grupo Sham + MEL e LDB + MEL. Foram avaliadas a histologia pulm
J. bras. pneumol.. Publicado em: 30/05/2019
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2. Eficácia e segurança da oxigenoterapia com cânula nasal de alto fluxo na insuficiência respiratória hipercápnica moderada aguda
RESUMO Objetivo: Avaliar a eficácia e a segurança da oxigenoterapia com uso de cânula nasal de alto fluxo no tratamento da insuficiência respiratória hipercápnica moderada em pacientes que não conseguem tolerar ou têm contraindicações para ventilação mecânica não invasiva. Métodos: Estudo prospectivo observacional de 13 meses envolvendo part
Rev. bras. ter. intensiva. Publicado em: 23/05/2019
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3. Age is the main factor related to expiratory flow limitation during constant load exercise
OBJECTIVE: The objective of this study was to investigate the interaction among the determinants of expiratory flow limitation (EFL), peak oxygen uptake (VO2peak), dysanapsis ratio (DR) and age during cycling at different intensities in young and middle-aged men. METHODS: Twenty-two (11 young and 11 middle-aged) men were assessed. Pulmonary function tests
Clinics. Publicado em: 29/10/2018
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4. Effect of exercise training on ventilatory efficiency in patients with heart disease: a review
The analysis of ventilatory efficiency in cardiopulmonary exercise testing has proven useful for assessing the presence and severity of cardiorespiratory diseases. During exercise, efficient pulmonary gas exchange is characterized by uniform matching of lung ventilation with perfusion. By contrast, mismatching is marked by inefficient pulmonary gas exchange,
Braz J Med Biol Res. Publicado em: 20/06/2016
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5. Evaluation of the Efficiency of the Atraumatic Endotracheal Tube in the Pulmonary-Gas Exchange: an Experimental Study
ABSTRACT OBJECTIVE: Mechanical ventilation is frequently necessary, in which case the use of an endotracheal tube is mandatory. The tube has an inflatable balloon in its distal extremity, whose aim is, among other functions, an efficient arterialization. However, serious injuries in the place of contact of the balloon with the trachea can be frequent. Some
Braz. J. Cardiovasc. Surg.. Publicado em: 2015-12
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6. Effect of hypertonic saline treatment on the inflammatory response after hydrochloric acid-induced lung injury in pigs
OBJECTIVES:Hypertonic saline has been proposed to modulate the inflammatory cascade in certain experimental conditions, including pulmonary inflammation caused by inhaled gastric contents. The present study aimed to assess the potential anti-inflammatory effects of administering a single intravenous dose of 7.5% hypertonic saline in an experimental model of
Clinics. Publicado em: 2015-08
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7. Dynamics of chest wall volume regulation during constant work rate exercise in patients with chronic obstructive pulmonary disease
This study evaluated the dynamic behavior of total and compartmental chest wall volumes [(V CW) = rib cage (V RC) + abdomen (V AB)] as measured breath-by-breath by optoelectronic plethysmography during constant-load exercise in patients with stable chronic obstructive pulmonary disease. Thirty males (GOLD stages II-III) underwent a cardiopulmonary exercise t
Braz J Med Biol Res. Publicado em: 2012-12
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8. Comparison of Celsior and Perfadex lung preservation solutions in rat lungs subjected to 6 and 12 hours of ischemia using an ex-vivo lung perfusion system
OBJECTIVE: This study evaluated the performance of lungs that were preserved with different solutions (Celsior, Perfadex or saline) in an ex vivo rat lung perfusion system. METHODS: Sixty Wistar rats were anesthetized, anticoagulated and randomized into three groups (n = 20). The rats were subjected to antegrade perfusion via the pulmonary artery with Perfad
Clinics. Publicado em: 2012-11
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9. Effect of methylprednisolone on perivascular pulmonary edema, inflammatory infiltrate, VEGF and TGF-beta immunoexpression in the remaining lungs of rats after left pneumonectomy
Pneumonectomy is associated with high rates of morbimortality, with postpneumonectomy pulmonary edema being one of the leading causes. An intrinsic inflammatory process following the operation has been considered in its physiopathology. The use of corticosteroids is related to prevention of this edema, but no experimental data are available to support this h
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-07
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10. Effect of hormone replacement on exercise cardiopulmonary reserve and recovery performance in subclinical hypothyroidism
Subclinical hypothyroidism (SH) patients present cardiopulmonary, vascular and muscle dysfunction, but there is no consensus about the benefits of levothyroxine (L-T4) intervention on cardiopulmonary performance during exercise. The aim of the present study was to investigate the effects of L-T4 on cardiopulmonary exercise reserve and recovery in SH patients
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-11
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11. Effects of experimental pulmonary hemodynamic overload on cardiovascular system and pulmonary structural and function / Efeitos da sobrecarga hemodinâmica pulmonar experimental no sistema cardiovascular e na estrutura e função pulmonar
INTRODUCTION: The pulmonary hemodynamic overload (PHO) is associates to high mortality and morbidity clinical entities as: postpneumonectomy pulmonary edema, pulmonary thromboembolism, lung transplantation and physiological situations as physical exercise. Some pathophysiological aspects related to PHO are not elucidated. OBJECTIVES: To study pulmonary and c
Publicado em: 2010
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12. Blockade of the action of nitric oxide in human septic shock increases systemic vascular resistance and has detrimental effects on pulmonary function after a short infusion of methylene blue
To investigate the role of nitric oxide in human sepsis, ten patients with severe septic shock requiring vasoactive drug therapy and mechanical ventilation were enrolled in a prospective, open, non-randomized clinical trial to study the acute effects of methylene blue, an inhibitor of guanylate cyclase. Hemodynamic and metabolic variables were measured befor
Publicado em: 2010