Hyperoxic
Mostrando 1-12 de 92 artigos, teses e dissertações.
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1. Expression dynamics of caveolin-1 in fibroblasts of newborn rats with chronic lung disease and its impact on lung fibroblast proliferation
Abstract Purpose: To evaluate the changes of caveolin-1 in lung fibroblasts in newborn Wistar rats when exposed to hyperoxic conditions, as well as lung fibroblasts cell cycle. Methods: One hundred newborn Wistar rats were randomly divided (50 rats/group) into experimental and control groups, exposed to hyperoxic conditions or normal air, respectively. Th
Acta Cir. Bras.. Publicado em: 2017-05
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2. Update on Middle Ear Barotrauma after Hyperbaric Oxygen Therapy?Insights on Pathophysiology
Introduction Middle ear barotrauma is the most common side effect of hyperbaric oxygen therapy. Knowledge and understanding of its pathophysiology are crucial for an accurate diagnosis and proper decision making about treatment and prevention. Objective Describe up-to-date information on pathophysiology of middle ear barotrauma after hyperbaric oxygen t
Int. Arch. Otorhinolaryngol.. Publicado em: 2014-04
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3. Effect of hyperbaric hepatic hyperoxia on the liver of rats submitted to intermittent ischemia/reperfusion injury
PURPOSE: To determine the effect of hyperbaric hyperoxia as hepatic preconditioning on hepatocellular integrity in rats submitted to intermittent hepatic ischemia/reperfusion injury. METHODS: Twenty male Wistar rats were divided into 4 groups (SHAM, I/R, HBO-I/R and CONTROL). The surgical technique consisted of total clamping of the hepatic pedicle for 15 m
Acta Cir. Bras.. Publicado em: 2014
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4. Hyperoxic preconditioning in partial liver ischemia
PURPOSE: To evaluate the effect of the hyperbaric oxygen (HBO) treatment as a pre-conditioning for I/R effects in the liver ischemia. METHODS: Fifty-seven male Wistar rats (260-300g) were submitted to the following procedures: SHAM; I/R, rats submitted to I/R, consisting of partial ischemia of 70% of the liver for 90 minutes followed by 15 minutes of reperf
Acta Cir. Bras.. Publicado em: 2014
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5. Effect of hyperoxia on the intestinal IgA secretory component in neonatal rats and on intestinal epithelial cells in vitro
Oxygen therapy is essential for the treatment of some neonatal critical care conditions but its extrapulmonary effects have not been adequately investigated. We therefore studied the effects of various oxygen concentrations on intestinal epithelial cell function. In order to assess the effects of hyperoxia on the intestinal immunological barrier, we studied
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-11
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6. Lung morphometry, collagen and elastin content: changes after hyperoxic exposure in preterm rabbits
INTRODUCTION: Elastic and collagen fiber deposition increases throughout normal lung development, and this fiber network significantly changes when development of the lung is disturbed. In preterm rats and lambs, prolonged hyperoxic exposure is associated with impaired alveolization and causes significant changes in the deposition and structure of elastic fi
Clinics. Publicado em: 2009-11
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7. Efeitos da indução de hiperóxia no tecido pulmonar de ratos wistar
The aim of this study was to evaluate the 100% oxygen concentration effects in Wistar rats lung tissue after 72 hours of exposition. Twelve male rats with mean weight 21015,9g, 60 to 90 days of age was studied, at random distributed in two groups with 6 animals. Control group remained in adaption phase conditions, and Hyperoxic group was submitted to inhalat
Publicado em: 2008
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8. Avaliação da eficacia de diferentes compostos nos modelos in vitro e in vivo da leishmaniose sob diferentes condições de oxigenio / Efficacy of different compounds in leishmaniasis in vitro and in vivo models under different oxygen tensions
L. amazonensis, a species transmitted mainly in the Amazon region, which is associated with localized cutaneous lesions and chemotherapy remains the mainstay for the control of leishmaniasis, as effective vaccines have yet to be developed. In this context, there is an intense search for potential new synthetic compounds and natural products for the treatment
Publicado em: 2007
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9. Structural alterations of rat carotid body exposed to hyperbaric oxygenation / Alterações estruturais de corpos carotídeos de ratos expostos à hiperoxigenação hiperbárica
We sough to confirm the existence of structural alterations in rat carotid bodies exposed to hyperoxia that could explain the attenuation of the ventilatory hypoxic drive (HD) by hyperoxic conditions described in the literature. We also tested the hypothesis of there being a deviation of blood flow toward intraglomic capillaries in situations of hyperbaric o
Publicado em: 2006
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10. Chemoreflex modulation by hypoxia and hypercapnia through submaximal exercise in heart failure patients / "Modulação do quimioreflexo por hipóxia e hipercapnia durante exercício submáximo na insuficiência cardíaca"
Heart failure(HF) dyspnea is complex with potential enrolment of central(CC) and peripheric chemoreceptors(PC).We investigated CC and CP behavior through submaximal exercise in 15 HF patients and 7 normal subjects in treadmill 6-minute cardiopulmonary walking tests:isocapnic hypoxia(HPO), hypercapnia hyperoxic(HCP) and room air.HPO increased:ventilation(VE)
Publicado em: 2005
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11. Development of peripheral chemoreceptor function in infants with chronic lung disease and initially lacking hyperoxic response.
Ten preterm infants with chronic lung disease (CLD) and undeveloped peripheral chemoreceptor function, described as ventilatory response to hyperoxia, were investigated, according to an individual protocol. Each infant was followed up until the response to hyperoxic inhalation had been observed on two occasions. Each examination consisted of overnight record
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12. The role of endotoxin in protection of adult rats from oxygen-induced lung toxicity.
Adult rats show evidence of severe lung damage after 72h of continuous exposure to hyperoxia (96-98% O2). Treatment of adult rats with a solution of Plasmanate, inadvertently contaminated with endotoxin-producing organisms, or with purified endotoxin itself markedly altered the lung toxicity associated with hyperoxic exposure (survival in treated animals = 1