Blood Volume Expansion
Mostrando 1-12 de 66 artigos, teses e dissertações.
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1. Two enteral solutions with different chloride concentrations administered by naso-ruminal route for fluid therapy in adult cattle
RESUMO: Seis vacas holandesas adultas foram utilizadas neste estudo de hidratação. Todos os animais foram submetidos previamente a 24 horas de jejum hídrico e alimentar e submetidos a ambos os tratamentos de hidratação por oito horas, em delineamento transversal 6x2. Foram realizados dois tratamentos com soluções hipotônicas balanceadas (190 mOsm/L)
Cienc. Rural. Publicado em: 22/08/2019
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2. Noradrenaline and dobutamine effects on the volume expansion with normal saline in rabbits subjected to hemorrhage
ABSTRACT PURPOSE: To evaluate the effects of dobutamine (DB), noradrenaline (NA), and their combination (NADB), on volume retention in rabbits submitted to hemorrhage. METHODS: Thirty six rabbits were randomly divided into 6 groups: SHAM, Control, Saline, DB, NA, DB+NA. All the animals, except for SHAM, were subjected to hemorrhage of 25% of the calculated
Acta Cir. Bras.. Publicado em: 2016-09
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3. Effects of catecholamines on volemic replacement with saline solution and the impact on heart rate variability in rabbits subjected to hemorrhage. A study by spectral analysis
PURPOSE: To verify the effects of different catecholamines on volemic expansion and on the autonomic nervous system in rabbits that were subjected to hemorrhage.METHODS: Twenty four rabbits subjected to hemorrhage (with a 25% loss of blood volume) and were randomly divided into four experimental groups: 1) HEMO Group underwent replacement with their own bloo
Acta Cir. Bras.. Publicado em: 2014-11
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4. The role of oxytocin in cardiovascular regulation
Studies of body volume expansion have indicated that lesions of the anteroventral third ventricle and median eminence block the release of atrial natriuretic peptide (ANP) into the circulation. Detailed analysis of the lesions showed that activation of oxytocin (OT)-ergic neurons is responsible for ANP release, and it has become clear that activation of neur
Braz J Med Biol Res. Publicado em: 18/03/2014
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5. Cortisol and 17-a-hydroxy-progesterone levels in infants with refractory hypotension born at 30 weeks of gestation or less
Refractory hypotension is frequent in very low-birth weight infants, whose hypothalamic-pituitary-adrenal axis has been suggested to be immature. The objective of the present study was to evaluate basal cortisol and 17-α-OH-progesterone in the first 36 h of life in preterm infants with and without refractory hypotension (mean arterial blood pressure below t
Publicado em: 2010
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6. GABA in the central amygdaloid nucleus modulates the electrolyte excretion and hormonal responses to blood volume expansion in rats
We investigated the involvement of GABAergic mechanisms of the central amygdaloid nucleus (CeA) in unanesthetized rats subjected to acute isotonic or hypertonic blood volume expansion (BVE). Male Wistar rats bearing cannulas unilaterally implanted in the CeA were treated with vehicle, muscimol (0.2 nmol/0.2 µL) or bicuculline (1.6 nmol/0.2 µL) in the CeA,
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-01
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7. Cortisol and 17-a-hydroxy-progesterone levels in infants with refractory hypotension born at 30 weeks of gestation or less
Refractory hypotension is frequent in very low-birth weight infants, whose hypothalamic-pituitary-adrenal axis has been suggested to be immature. The objective of the present study was to evaluate basal cortisol and 17-a-OH-progesterone in the first 36 h of life in preterm infants with and without refractory hypotension (mean arterial blood pressure below th
Brazilian Journal of Medical and Biological Research. Publicado em: 01/03/2007
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8. The role of the vagus nerve in hypertonic resuscitation of hemorrhagic shocked dogs
Previous studies have suggested a critical role for the vagi during the hypertonic resuscitation of hemorrhagic shocked dogs. Vagal blockade prevented the full hemodynamic and metabolic recovery and increased mortality. This interpretation, however, was challenged on the grounds that the blockade also abolished critical compensatory mechanisms and therefore
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-03
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9. Neuroendocrine control of body fluid homeostasis
Angiotensin II and atrial natriuretic peptide (ANP) play important and opposite roles in the control of water and salt intake, with angiotensin II promoting the intake of both and ANP inhibiting the intake of both. Following blood volume expansion, baroreceptor input to the brainstem induces the release of ANP within the hypothalamus that releases oxytocin (
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-02
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10. Nitrergic modulation of vasopressin, oxytocin and atrial natriuretic peptide secretion in response to sodium intake and hypertonic blood volume expansion
The central nervous system plays an important role in the control of renal sodium excretion. We present here a brief review of physiologic regulation of hydromineral balance and discuss recent results from our laboratory that focus on the participation of nitrergic, vasopressinergic, and oxytocinergic systems in the regulation of water and sodium excretion u
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-09
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11. Cardiovascular control in experimental diabetes
Several studies have reported impairment in cardiovascular function and control in diabetes. The studies cited in this review were carried out from a few days up to 3 months after streptozotocin administration and were concerned with the control of the circulation. We observed that early changes (5 days) in blood pressure control by different peripheral rece
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-09
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12. Oxytocin is a cardiovascular hormone
Oxytocin (OT), a nonapeptide, was the first hormone to have its biological activities established and chemical structure determined. It was believed that OT is released from hypothalamic nerve terminals of the posterior hypophysis into the circulation where it stimulates uterine contractions during parturition, and milk ejection during lactation. However, eq
Brazilian Journal of Medical and Biological Research. Publicado em: 2000-06