hyperoxia/hypoxia

Sábháiltear an nasc chuig an gearrthaisce

Roghnaigh cineál sórtála

Leathanach 1 ó 1988 torthaí

Carotid chemoreceptor function and structure in the atherosclerotic rabbit: respiratory and cardiovascular responses to hyperoxia, hypoxia and hypercapnia.

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Logáil Isteach / Cláraigh

We tested the following hypothesis: if carotid body blood flow, and hence the relationship of the frequency of discharge in chemoreceptor afferent fibres to arterial PO2, were affected by atherosclerotic change, then a modification of the control of the respiratory and cardiovascular systems might

The effect of hyperoxia, hypoxia and hypercapnia on FRC and occlusion pressure in human subjects.

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Logáil Isteach / Cláraigh

The measurement of pressure in the mouth 0.1 sec after the initiation of an occluded inspiratory effort (P0.1) has been proposed as an index of activity of medullary inspiratory neurons. If changes in FRC can be interpreted as important changes in the length-tension curve of the diaphragm or the

Mechanisms of cerebrovascular O2 sensitivity from hyperoxia to moderate hypoxia in the rat.

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Logáil Isteach / Cláraigh

Cerebrovascular dilation over PaO2 ranging from hyperoxia to moderate hypoxia is unexplained. We hypothesize that tissue acidosis is the cause. Local cortical cerebral blood flow (LCBF), tissue hydrogen ion concentration [H+]t, and tissue PO2 (PtO2) were measured with microelectrodes in the parietal

The 50/10 Oxygen-Induced Retinopathy Model Serves as a Hyperoxia and Hypoxia Model of Bronchopulmonary Dysplasia.

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Logáil Isteach / Cláraigh

Animal models of bronchopulmonary dysplasia (BPD) are mainly created by hyperoxia exposure. However, these models do not fully recapitulate BPD pathophysiology as observed in clinical practice. To find a better BPD model, we established a rat 50/10 oxygen-induced retinopathy (OIR) model and analyzed

Alterations in resting cerebrovascular regulation do not affect reactivity to hypoxia, hyperoxia, or neurovascular coupling following a SCUBA dive

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Logáil Isteach / Cláraigh

New findings: What is the central question of this study? To characterize cerebral blood flow (CBF) regulation following a single SCUBA dive to a depth of 18 m sea water with a 47-minute bottom time. What is the main finding and its

Serum troponin T values in 7-day-old hypoxia-and hyperoxia-treated, and 10-day-old ascitic and debilitated, commercial broiler chicks.

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Logáil Isteach / Cláraigh

Troponin T is a cardiac-specific protein forming part of the contractile apparatus of striated muscle, and in humans it is a new, sensitive and highly specific indicator of early myocardial damage in 'at risk' patients. Serum troponin T values were investigated in 7-day-old hypoxia- and

Improvement in oxygen tensions and pulmonary blood flow with intermittent distal aortic compression during normoxia, hypoxic hypoxia, and hyperoxia in neonatal piglets.

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Logáil Isteach / Cláraigh

METHODS We investigated the hypothesis that, in a newborn piglet during normoxia, hypoxia, and hyperoxia, increasing aortic pressure transiently by intermittent short-duration aortic compression would affect left-to-right shunting of blood and thus increase pulmonary artery blood flow, pulmonary

Enhanced hypoxia-stimulated erythropoietin production in mice with depression of erythropoiesis induced by hyperoxia.

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Logáil Isteach / Cláraigh

Current evidence suggests that a modulatory action on O(2)-dependent EPO secretion is exerted by the erythroid/precursor cell population in the erythropoietic organs through a negative feedback system. The hypothesis is based on studies of stimulated-EPO secretion performed in mice in whom the

Effects of hypoxia and hyperoxia on ventilatory kinetics during recovery from exercise.

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Logáil Isteach / Cláraigh

The purpose of this investigation was to determine the effects of breathing hyperoxic and hypoxic gas mixtures on ventilatory kinetics in the transition from submaximal exercise to rest. Eight male subjects performed three separate single blind exercise tests at 80% of their ventilatory threshold.

Perinatal hyperoxia for 14 days increases nerve conduction time and the acute unitary response to hypoxia of rat carotid body chemoreceptors.

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Logáil Isteach / Cláraigh

Hyperoxia in the immediate perinatal period, but not in adult life, is associated with a life-long impairment of the ventilatory response to acute hypoxia. This effect is attributed to a functional impairment of peripheral chemoreceptors, including a reduction in the number of chemoreceptor afferent

Multiple inert gas elimination technique for determining ventilation/perfusion distributions in rat during normoxia, hypoxia and hyperoxia.

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Logáil Isteach / Cláraigh

1. The use of the multiple inert gas elimination technique (MIGET) in quantifying ventilation/perfusion distributions (V*A/Q*) in small animals, such as the rat, may cause results to be biased due to haemodilution produced by the large volume of liquid infused intravenously. 2. We tested two methods

THE EFFECTS OF HYPOXIA, HYPEROXIA OR HYPERCAPNIA ON THE ACID-BASE DISEQUILIBRIUM IN THE ARTERIAL BLOOD OF RAINBOW TROUT

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Logáil Isteach / Cláraigh

An extracorporeal circulation in combination with a stopflow technique was used to characterize the acidbase disequilibrium in the arterial blood of rainbow trout Oncorhynchus mykiss during environmental hypoxia, hyperoxia or hypercapnia. Arterial blood was routed from the coeliac artery

Cerebral oxygenation of the cortex and striatum following normobaric hyperoxia and mild hypoxia in rats by EPR oximetry using multi-probe implantable resonators.

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Logáil Isteach / Cláraigh

Multi-site electron paramagnetic resonance (EPR) oximetry, using multi-probe implantable resonators, was used to measure the partial pressure of oxygen (pO(2)) in the brains of rats following normobaric hyperoxia and mild hypoxia. The cerebral tissue pO(2) was measured simultaneously in the cerebral

Effect of hyperoxia and hypoxia on leg blood flow and pulmonary and leg oxygen uptake at the onset of kicking exercise.

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Logáil Isteach / Cláraigh

The purpose of this study was to examine the interactions of adaptations in O2 transport and utilization under conditions of altered arterial O2 content (CaO2), during rest to exercise transitions. Simultaneous measures of alveolar (VO2alv) and leg (VO2mus) oxygen uptake and leg blood flow (LBF)

Effects of intermittent hypoxia-hyperoxia on mobility and perceived health in geriatric patients performing a multimodal training intervention: a randomized controlled trial.

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Logáil Isteach / Cláraigh

Additional benefits of passive exposures to intermittent hypoxia and hyperoxia on cognitive performance and functional exercise capacity have been demonstrated in geriatric patients who performed a multimodal training program. The main goal of the present study was to evaluate effects

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