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Stranica 1 iz 295 rezultatima
Stimulation of the dopamine 1 receptor increases lung edema clearance.
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We previously reported that lung edema clearance was stimulated by dopamine (DA). The purpose of this study was to determine whether the DA-mediated stimulation of edema clearance occurs via an adrenergic or dopaminergic regulation of alveolar epithelial Na, K-ATPase. When isolated perfused rat
Dopamine restores lung ability to clear edema in rats exposed to hyperoxia.
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Exposure to hyperoxia causes lung injury, decreases active sodium transport and lung edema clearance in rats. Dopamine (DA) increases lung edema clearance by stimulating vectorial Na+ flux and Na, K-ATPase function in rat alveolar epithelium. This study was designed to test whether DA (10(-)5 M)
Dopamine inhibits pulmonary edema through the VEGF-VEGFR2 axis in a murine model of acute lung injury.
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The neurotransmitter dopamine and its dopamine receptor D2 (D2DR) agonists are known to inhibit vascular permeability factor/vascular endothelial growth factor (VEGF)-mediated angiogenesis and vascular permeability. Lung injury is a clinical syndrome associated with increased microvascular
The effects of dopamine on edema formation in two models of traumatic brain injury.
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The risk of vasopressors worsening cerebral edema has been raised. Previously we have reported that dopamine was able to restore cerebral blood flow in a model of monotonically rising intracranial pressure. In this study the effects of dopamine on cortical contusion and diffuse injury with secondary
The pulmonary vascular effects of dopamine, dobutamine, and isoproterenol in unilobar pulmonary edema in dogs.
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Although catecholamine inotropic drugs are often used to support the circulation of critically ill patients with hypoxemic respiratory failure, their effect on the pulmonary circulation and on gas exchange is incompletely understood. In order to improve our understanding of the effects of these
Regulation of lung edema clearance by dopamine.
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In the kidney, dopamine inhibits Na,K-ATPase, which results in natriuresis because less Na+ is reabsorbed by the proximal and distal tubules. In contrast, dopamine stimulates Na,K-ATPase activity in the alveolar epithelium, leading to increased alveolar fluid reabsorption. Importantly, dopamine
[Comparative studies of urinary electrolyte excretion, the renin-angiotensin-aldosterone system and plasma dopamine-beta-hydroxylase activity in patients with idiopathic edema and normal subjects during the menstrual cycle (author's transl)].
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The changes of circumferential size of legs, urine output, the amount of urinary Na and K excretion, tubular rejection fraction of Na (TRF Na), urinary Na/K ratio, plasma renin activity (PRA), plasma aldosterone concentration (PAC), the amount of urinary aldosterone excretion (UAE) and plasma
Responses of plasma immunoreactive atrial natriuretic factor, aldosterone and urinary dopamine to salt-loading in a patient with severe idiopathic edema.
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A patient with severe idiopathic edema and long history of diuretic abuse had, in response to salt loading, an inability to increase urinary sodium excretion associated with a paradoxical response (decrease) of urinary dopamine excretion, a non suppressible aldosterone and non stimulable
Influence of norepinephrine and dopamine on cortical perfusion, EEG activity, extracellular glutamate, and brain edema in rats after controlled cortical impact injury.
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Following traumatic brain injury, catecholamines given to ameliorate cerebral perfusion may induce brain damage via cerebral arteriolar constriction and increased neuronal excitation. In the present study the acute effects of norepinephrine and dopamine on pericontusional cortical perfusion (rCBF),
Effect of dopamine on platelet activating factor induced-pulmonary edema in isolated and perfused rabbit lungs.
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The effect of dopamine over pulmonary edema induced by PAF was studied. Thirty preparations of rabbit lungs were used: six control preparations (CP), six PAF preparations (PP) in which we injected a dose of 1 microg/kg of rabbit weight and eighteen dopamine preparations (DAP) divided in three groups
Effects of dopamine on posttraumatic cerebral blood flow, brain edema, and cerebrospinal fluid glutamate and hypoxanthine concentrations.
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OBJECTIVE
Dopamine is often used in the treatment of traumatic brain injury to maintain cerebral perfusion pressure. However, it remains unclear whether dopamine contributes to secondary brain injury caused by vasoconstriction and resulting diminished cerebral perfusion. The present study
Catecholamine excretion in "idiopathic" edema: decreased dopamine excretion, a pathogenic factor?
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In 16 women with idiopathic edema, urinary dopamine excretion was decreased when compared to control women (146 +/- 13 SE ng/ml/m2 vs. 212 +/- 32, P less than 0.05 in the supine position and 140 +/- 9 vs. 199 +/- 20, P less than 0.005 combined values of supine and recumbent positions) and was also
Intratracheal dopamine attenuates pulmonary edema and improves survival after ventilator-induced lung injury in rats.
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BACKGROUND
Clearance of alveolar oedema depends on active transport of sodium across the alveolar-epithelial barrier. beta-Adrenergic agonists increase clearance of pulmonary oedema, but it has not been established whether beta-agonist stimulation achieves sufficient oedema clearance to improve
[Fluorometric determination of levarterenol, epinephrine and dopamine in the urine of rats with carrageenan edema and adjuvant arthritis].
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After adsorption-chromatographic separation (using aluminium oxide) and chemical conversion to the corresponding trihydroxyindole derivatives, epinephrine, levarterenol and dopamine were determined fluorometrically in urine from rats. In case of carrageenin oedema, as well as during the secondary
Improving survival by increasing lung edema clearance: is airspace delivery of dopamine a solution?
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In this issue of Critical Care Chamorro-Marin and coworkers provide new evidence that dopamine instilled into airspaces is beneficial in a rat model of ventilator-induced lung injury. This study is important because it is the first to explore the effects of dopamine on survival, albeit short term.
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