نتایج جستجو برای: hypovolemia

تعداد نتایج: 1126  

Journal: :Hawaii medical journal 2010
Takashi Hato Roland Ng

BACKGROUND We are often left with the differential diagnosis of syndrome of inappropriate antidiuretic hormone secretion (SIADH) versus hypovolemic hyponatremia. It is difficult to tell who will respond to isotonic saline infusion and who will not, if the urine sodium value is not completely suppressed (>10 mEq/L). AIM To examine the diagnostic accuracy of the urine sodium value. DESIGN A r...

Journal: :American journal of physiology. Heart and circulatory physiology 2008
M Lindenberger H Olsen T Länne

Acute hemorrhage is a leading cause of death in trauma, and women are more susceptible to hypovolemic circulatory stress than men. The mechanisms underlying the susceptibility are not clear, however. The aim of the present study was to examine the compensatory mechanisms to defend central blood volume during experimental hypovolemia in women and men. Twenty-two women (23.1 +/- 0.4 yr) and 16 me...

2016
Michael Joubert Dimitri Bellevre Damien Legallois Nicolas Elie Laurent Coulbault Stéphane Allouche Alain Manrique M.Faadiel Essop

AIMS The aim of the study was to assess the early features of diabetic cardiomyopathy using cardiac magnetic resonance within the first week after streptozotocin injection in mice. We focused on the relationship between left ventricular function and hypovolemia markers in diabetic animals compared to a hypovolemic rodent model. METHODS AND RESULTS Swiss mice were randomized into control (grou...

Journal: :The Journal of trauma 2008
Gregory S H Chan Paul M Middleton Branko G Celler Lu Wang Nigel H Lovell

BACKGROUND Change in cardiac preload caused by mild hypovolemia can alter left ventricular ejection time (LVET) without noticeable change in blood pressure (BP). Previously our group has explored a novel method of LVET monitoring using a noninvasive finger photoplethysmographic pulse oximetry wave form. The current study investigated the ability of photoplethysmographic pulse oximetry wave form...

Journal: :Pain physician 2009
Jeffrey Huang

TO THE EDITOR: I read with interest, the case report describing acute renal failure during spinal cord stimulation trial (1). The authors attributed the episode of acute renal failure to spinal cord stimulation. They speculated that decreased renal blood flow and peripheral vasodilation from sympathetic blockade by spinal cord stimulation contributed to acute renal failure. The effects of spina...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2005
Qi Fu Sarah Witkowski Kazunobu Okazaki Benjamin D Levine

We tested the hypothesis that women have blunted sympathetic neural responses to orthostatic stress compared with men, which may be elicited under hypovolemic conditions. Muscle sympathetic nerve activity (MSNA) and hemodynamics were measured in eight healthy young women and seven men in supine position and during 6 min of 60 degrees head-up tilt (HUT) under normovolemic and hypovolemic conditi...

2013
Dongmei Wu Jeffrey A. Kraut William M. Abraham

INTRODUCTION Acute metabolic acidosis impairs cardiovascular function and increases the mortality of critically ill patients. However, the precise mechanism(s) underlying these effects remain unclear. We hypothesized that targeting pH-regulatory protein, Na(+)/H(+) exchanger (NHE1) could be a novel approach for the treatment of acute metabolic acidosis. The aim of the present study was to exami...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2017
Victoria L Kay Justin D Sprick Caroline A Rickards

Resistance breathing improves tolerance to central hypovolemia induced by lower body negative pressure (LBNP), but this is not related to protection of anterior cerebral blood flow [indexed by mean middle cerebral artery velocity (MCAv)]. We hypothesized that inspiratory resistance breathing improves tolerance to central hypovolemia by maintaining cerebral oxygenation (ScO2), and protecting cer...

Journal: :American journal of physiology. Heart and circulatory physiology 2008
Indu Taneja Marvin S Medow June L Glover Neeraj K Raghunath Julian M Stewart

Our prior studies indicated that postural fainting relates to splanchnic hypervolemia and thoracic hypovolemia during orthostasis. We hypothesized that thoracic hypovolemia causes excessive sympathetic activation, increased respiratory tidal volume, and fainting involving the pulmonary stretch reflex. We studied 18 patients 13-21 yr old, 11 who fainted within 10 min of upright tilt (fainters) a...

2000
Uwe Kreimeier

Fluid imbalance can arise due to hypovolemia, normovolemia with maldistribution of fluid, and hypervolemia. Trauma is among the most frequent causes of hypovolemia, with its often profuse attendant blood loss. Another common cause is dehydration, which primarily entails loss of plasma rather than whole blood. The consequences of hypovolemia include reduction in circulating blood volume, lower v...

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