hypoxia/نزف

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Detection of tissue hypoxia by arteriovenous gradient for PCO2 and pH in anesthetized dogs during progressive hemorrhage.

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The present study tested the hypothesis that, during acute bleeding, the development of tissue hypoxia might be reflected by an abrupt widening in arteriovenous gradient for PCO2 (AV PCO2) and for pH (AV pH) as accurately as by an increase in blood lactate levels. Twenty-four anesthetized

Phosphoramidon does not inhibit endogenous endothelin-1 release stimulated by hemorrhage, cytokines and hypoxia in rats.

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The role of phosphoramidon-sensitive endothelin converting enzyme in the release of endogenous endothelin-1 was investigated in anesthetized rats. Intravenous infusion of phosphoramidon 0.3 mg/kg/min did not suppress the release of endothelin-1 stimulated by hemorrhage or cytokines. Elevation of

Persistent gastric mucosal hypoxia and interstitial edema after hemorrhagic shock: prevention with steroid therapy.

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To define the role of the nutrient microvasculature in the pathogenesis of acute gastric mucosal erosions, a correlation was performed of changes in intracellular oxygenation (ICPO2) and intracellular potential difference (ICPD) in surface epithelial cells with the histological alterations in the

Downregulating hypoxia-inducible factor-1α expression with perfluorooctyl-bromide nanoparticles reduces early brain injury following experimental subarachnoid hemorrhage in rats.

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The aim of the present study was to investigate the effects of perfluorooctyl-bromide (PFOB) nanoparticles on hypoxia-inducible factor 1 alpha (HIF-1α) and its downstream target genes in early brain injury (EBI) after subarachnoid hemorrhage (SAH). Healthy male Sprague Dawley rats (n=100) were

Influence of long-term intermittent exposures to hypoxia on decompression-induced pulmonary haemorrhage.

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Healthy male rats were acclimatized by being placed in a decompression chamber at a simulated altitude of 18 000 feet (5486 m) for three hours daily for 84 days. The altitude acclimatized rats paired with unacclimatized rats were rapidly decompressed together. The range of decompression was

Renal lactate extraction as an indicator of tissue hypoxia in haemorrhagic hypotension.

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The interrelation between the renal cortical pO2 and renal fractional extraction of arterial lactate was investigated in dogs subjected to gradual haemorrhage up to 45-50% of their blood volume. The cortical pO2, measured by means of an implanted Silastic tube, responded immediately to graded

[Organ-specific characteristics of blood supply in the liver, kidney, and brain in acute blood loss in rats with various resistance to circulatory hypoxia].

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A marked fall in arterial blood pressure, organ blood flow rates and tissue perfusion in the liver, kidneys and brain was registered by ultrasound and laser Doppler flowmetry in rats with low (LR) and high resistance (HR) to circulatory hypoxia (average life spans less than 1.5 h and more than 3 h

Estrogen suppresses cardiac IL-6 after trauma-hemorrhage via a hypoxia-inducible factor 1 alpha-mediated pathway.

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Cardiac dysfunction is a major concern after trauma-hemorrhage, and increased IL-6 is one of the underlying causes for producing the dysfunction. Studies have shown that administration of 17beta-estradiol (estrogen) after trauma-hemorrhage normalized cardiac IL-6 levels and restored cardiac

Site-specific induction of intestinal hypoxia-inducible factor-1α after hemorrhagic shock.

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The intestine is a major target organ in hemorrhagic shock (HS)-induced tissue injury. Hypoxia-inducible factor (HIF)-1α is the primary transcription factor responsible for regulating cellular response to changes in oxygen tension. Since HS is an acute hypoxic insult, the present study examined

Early CT signs of hypoxia in patients with subarachnoid hemorrhage presenting with cardiac arrest: early CT signs in SAH patients presenting with CA.

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BACKGROUND For cardiac arrest (CA) victims, brain computed tomography (CT) may serve as a prognosticator. Loss of gray-white matter discrimination (GWMD) and sulcal edema/effacement are reliable CT signs of hypoxia, and a time window may exist for development of these signs. Most data are derived

Selective Brain Cooling Reduces Motor Deficits Induced by Combined Traumatic Brain Injury, Hypoxemia and Hemorrhagic Shock.

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Selective brain cooling (SBC) can potentially maximize the neuroprotective benefits of hypothermia for traumatic brain injury (TBI) patients without the complications of whole body cooling. We have previously developed a method that involved extraluminal cooling of common carotid arteries, and

Organ-specific characteristics of blood supply in acute hemorrhage in rats with different resistance to circulatory hypoxia.

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The present study is aimed toward a comparative real-time analysis of organ-specific characteristics of the liver, kidney and brain blood supply in the dynamics of acute massive hemorrhage in rats with different resistance to circulatory hypoxia. The survival time of experimental animals after the

Diffuse alveolar haemorrhage and severe hypoxemia from Strongyloides stercoralis hyperinfection syndrome.

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Strongyloides stercoralis hyperinfection syndrome is a rare, yet highly fatal disorder. It occurs most commonly in immunocompromised patients. We report a case of a 36-year-old Ethiopian female who presented with abdominal pain and hypotension. Shortly thereafter, she developed acute respiratory

Hypoxia from vasculitic pulmonary haemorrhage improved by prone position ventilation.

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Ventilation in the prone position is used in patients with acute respiratory distress syndrome (ARDS), although data supporting this strategy are limited, and benefit for patients with other conditions is unclear. The patient in this report had severe hypoxaemia from diffuse alveolar haemorrhage

[Hematopoietic stem cell count in mice with stimulated and suppressed erythropoiesis. I. Blood loss and acute hypoxia].

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Polypotential hemopoietic stem cell numbers were determined by means of the splenic colony-forming unit (CFU-S) method in bone marrow and spleen of CBA mice in different periods after bleeding and acute hypoxia. After these treatments, radioactive isotope (59Fe) uptake by erythroid cells, considered

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