Hypercarbia
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Prone position and extracorporeal membrane oxygenation in acute respiratory distress syndrome
Resumo Introdução: A síndrome do desconforto respiratório agudo trata-se de um processo inflamatório decorrente de uma variedade de doenças críticas, que resulta em edema proteico não hidrostático do parênquima pulmonar. O que determina hipoxemia refratária, lesão alveolar difusa, diminuição da complacência e hipercarbia secundária a perda d
Fisioter. mov.. Publicado em: 21/10/2019
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2. Hypercarbic cardiorespiratory reflexes in the facultative air-breathing fish jeju (Hoplerythrinus unitaeniatus): the role of branchial CO2 chemoreceptors.
The aim of the present study was determine the roles that externally versus internally oriented CO2/H+ - sensitive chemoreceptors might play in promoting cardiorespiratory responses to environmental hypercarbia in the air-breathing fish.
The Journal of Experimental Biology. Publicado em: 2011
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3. Participação dos núcleos da rafe nas respostas cardiorespiratórias à hipóxia e hipercarbia em sapos / Role of the raphe nuclei in the ventilatory and cardiovascular response to hypoxia and hipercarbia in toads
The raphe nuclei are brainstem cell groups and the main cell type is serotonergic. In adult anurans electrical or chemical stimulation of the medullary raphe has no effect on ventilation, whereas in mammals depending on the specific site of stimulation, an excitatory or inhibitory response is elicited. In mammals the medullary raphe participate in the ventil
Publicado em: 2010
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4. Repercussões nos gases sanguíneos de recém-nascidos prematuros com síndrome do desconforto respiratório e sob ventilação mecânica convencional após ajuste no tempo inspiratório em função da constante de tempo
Were evaluated twenty-five neonates with less than 2000 grams of birth weight and gestational age lesser than thirty-five weeks, diagnosed with respiratory distress syndrome, on conventional mechanical ventilation, treated with exogenous surfactant and were at first seventy-two hours of life. With the use of a pneumotachometer associated to ventilator were p
Publicado em: 2006
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5. Effect of carbon dioxide inhalation on the pattern of gaseous metabolism in ischaemic zones of the primate cortex1: An experimental study of the `intracerebral steal' phenomenon in baboons
The cortical circulation of the baboon has been studied during ischaemia produced by middle cerebral occlusion. Evidence of reactive hyperaemia did not occur in hypercapnia. Metabolic studies as a whole present evidence of increased interference with gaseous metabolism during hypercarbic occlusion, despite raised venous pO2 during hypercarbia. The significan
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6. Spinal cord blood flow in dogs: the effect of blood pressure
A study has been made into the effects of blood pressure on the spinal cord blood flow. Under conditions of normoxia and normocarbia a well-functioning autoregulation was present between 150-60 mmHg. Below 60 mmHg the flow decreased with reductions in pressure. In individual dogs, autoregulation was sometimes present to 40 mmHg. Under conditions of hypoxia o
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7. Depression of Ventilation by Dopamine in Man: EVIDENCE FOR AN EFFECT ON THE CHEMORECEPTOR REFLEX
Dopamine is present in the carotid body and has been postulated to be an inhibitory neurotransmitter. The purpose of this study was to determine the effects of dopamine on ventilation in man and to examine its mechanism of action. Dopamine (0.5-10 μg/kg per min) was infused in eight normal men at different levels of arterial chemoreceptor activity, produced
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8. Vascular reactivity in the primate brain after acute cryogenic injury.
The effects of an acute cryogenic injury on cerebral flow (CBF) and cerebral vascular reactivity were studied in 12 anaesthetised, ventilated baboons. Autoregulation, defined in this study as intact with a greater than 20% change in cerebrovascular resistance in response to a change in cerebral perfusion pressure, was tested before the lesion by arterial hyp
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9. Prostaglandin E1 increases survival with extended anhepatic phase during liver transplantation.
OBJECTIVE: The authors investigated the intraoperative treatment effects of Prostaglandin E1 (PGE1) for extension of the anhepatic phase and improvement of survival in a rat liver transplant model. BACKGROUND: Cross-clamping the inferior vena cava and the portal vein during liver transplantation causes severe pathophysiologic changes during surgery. The time
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10. Magnetic resonance imaging of perfusion using spin inversion of arterial water.
A technique has been developed for proton magnetic resonance imaging (MRI) of perfusion, using water as a freely diffusable tracer, and its application to the measurement of cerebral blood flow (CBF) in the rat is demonstrated. The method involves labeling the inflowing water proton spins in the arterial blood by inverting them continuously at the neck regio
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11. Laparoscopic Heller myotomy and fundoplication for achalasia.
OBJECTIVE: The goal of this study was to review the authors' results with laparoscopic cardiomyotomy and partial fundoplication for achalasia. SUMMARY BACKGROUND DATA: Pneumatic dilatation and botulinum toxin (BOTOX) injection of the lower esophageal sphincter largely have replaced cardiomyotomy for treatment of achalasia. After a brief experience with a tho
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12. Contribution of oxygen-sensitive neurons of the rostral ventrolateral medulla to hypoxic cerebral vasodilatation in the rat.
1. We sought to determine whether hypoxic stimulation of neurons of the rostral ventrolateral reticular nucleus (RVL) would elevate regional cerebral blood flow (rCBF) in anaesthetized paralysed rats. 2. Microinjection of sodium cyanide (NaCN; 150-450 pmol) into the RVL rapidly (within 1-2 s), transiently, dose-dependently and site-specifically elevated rCBF