plasma volume

Preeclampsia is associated with enhanced sympathetic activity as well as subnormal plasma volume. Meanwhile, in over 50% of these complicated pregnancies, the subnormal plasma volume has been found to persist for a prolonged period after ..

We tested whether the opioid antagonist naloxone affects responses to plasma volume expansion (PVE) in conscious rabbits. Under basal conditions, naloxone (6 mg x kg-(1) plus 0.3 mg x kg(-1) x min(-1) i.v...

..Tracer-dilution experiments showed increased plasma volume in KO...

Endothelial dysfunction and a subnormal plasma volume predispose to preeclampsia...

..synthetic colloid hydroxyethyl starch (HES 130 kD) and a crystalloid regimen with Ringer's solution (RS) on plasma volume (PV) maintenance as well as on systemic and regional hemodynamics...

..Additionally, the test-retest reliability of the heart rate (HR) and plasma volume changes (deltaPV) response was also evaluated.

..3 months (range, 3-9 months) to normalize thyroid function. The mean reductions of body weight and estimated plasma volume were 1.8+/-1.0 kg (P=0.002) and 8.5% (P<0.001), respectively...

..CHO) supplementation immediately after exercise each day during aerobic training facilitated plasma volume (PV) expansion and thermoregulatory and cardiovascular adaptations in older men...

..Creatinine (CR), urea, haemoglobin (Hb), haematocrit (Hct) and plasma volume (PV) were investigated in 16 male ultramarathon cyclists during the 1st Race Across the Alps in 2001 (distance:..

..We hypothesized that restoring plasma volume with salt tablets and water after 12 days of head-down bed rest would result in an absence of hemodynamic and ..

Atrial natriuretic peptide (ANP) acts acutely to reduce plasma volume by at least 3 mechanisms: increased renal excretion of salt and water, vasodilation, and increased vascular permeability...

..During exercise, plasma volume (PV) decreased by 5.7 +/- 0.7 and 7. 0 +/- 0...

To determine the time course of plasma volume expansion in early pregnancy.

Salt loading of patients with orthostatic-related syncope has been shown to increase plasma volume and orthostatic tolerance and to decrease baroreceptor sensitivity...

Albumin infusions transiently increase plasma volume (PV) and oncotic pressure, and may restore diuretic responsiveness in nephrotic edema...

..hormones, such as aldosterone and estradiol, either preceding or concomitant with the onset of the reduced plasma volume described in these women...

..b>Plasma volume (PV) and blood volume (BV) decreased at altitude but increased when OI and SI returned to sea level...

..were acquired before and after administration of Gd-DTPA-albumin to obtain parametric maps of fractional plasma volume (fpv) and transendothelial permeability (Kps)...

..colloid osmotic pressures (plasma/interstitial fluid), haematocrit [s-albumin/protein] were recorded and plasma volume measured together with tissue perfusion during normothermia, cooling and stable hypothermia (coloured ..

To determine whether plasma volume determined by the indocyanine green (ICG) dilution method (PV-ICG) is equally accurate independently of its disappearance rate from plasma in the critically ill.

..However, the effect of plasma volume on outcome has not been evaluated...

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Erythropoietin (Epo) has been suggested to affect plasma volume, and would thereby possess a mechanism apart from erythropoiesis to increase arterial oxygen content...

..colloid preparations, one a high molecular weight and the other a low molecular weight preparation, on the plasma volume changes over time...

To compare the new hydroxyethyl starch HES 130/0.4 (Voluven) and the standard HES 200/0.5 (pentastarch) regarding effectiveness for plasma volume substitution and safety of large volumes in heart surgery.

..The purpose of the present study was to compare approximated IDVG, derived from just two blood samples, versus original IDVG, and to test whether approximated IDVG is an acceptable alternative measure of IDVG in the intensive care unit...

To determine whether the initial distribution volume of glucose (IDVG) rather than plasma volume or blood volume is correlated better with cardiac output during the 4 days following major surgery.

..IDVG and plasma volume were calculated after measuring cardiac index (CI), central venous pressure, and pulmonary artery wedge ..

To investigate a technique using 20% albumin for measurement of plasma volume in critically ill patients.

..The purpose of this study was to describe changes in initial distribution volume of glucose, plasma volume determined by the indocyanine green dilution method (PV-ICG), and thoracic fluid content by thoracic ..

..Pre-eclampsia is a multisystem disorder, peculiar to and frequent in human pregnancy. It remains a leading cause of maternal and neonatal morbidity and mortality. Hemodynamic disturbances are the most prominent features of the syndrome...

..9%, 2.2%, and 2.3%, respectively (P < 0.05). Percentile increase in plasma volume calculated from Hb and Hct before and after induction was 4%...

Potential overestimation of plasma volume (PV) determination by the conventional indocyanine green (ICG) dilution method (PV-ICG) can occur when generalized capillary protein leakage is present, because ICG binds to proteins...

..To determine whether indocyanine green (ICG) and glucose dilutions can detect generalized capillary protein leakage in septic patients without requiring repeated measurements...

..measurement of the concentration of hormones and other biomarkers in pregnant subjects is influenced by plasma volume expansion (PVE)...

..Decreased plasma volume was rarely seen in any of the disease categories...

..clearance with ANP treatment accounts for at most 30% of whole body clearance required for ANP to regulate plasma volume. Skin microcirculation responded to ANP similarly...

..In pregnant rats, 5-HTP lowered plasma volume (control: 22+/-1.1; 5-HTP: 17+/-0.7 mL; P<0...

..Red blood cell volume and plasma volume were determined by using chromium-51-labeled erythrocytes and iodine-125-labeled albumin, respectively, in ..

..01), and increased plasma volume (25 +/- 10%; P < 0.01) with a stable sodium concentration...

During pregnancy, there is a marked plasma volume expansion due to renal sodium retention...

The aim was to evaluate the cardiodynamic adjustment during 4 days of prolonged exercises and to check if the plasma volume (PV) expansion which is observed generally during such events plays a role in this adaptation...

..In virgin and pregnant animals, A-779 administration had no effect on blood pressure, plasma volume, blood volume, or urinary electrolytes...

..that sodium excretion is controlled by neurohumoral mechanisms that are quite resistant to acute changes in plasma volume and colloid osmotic pressure and are not down-regulated within 2 h...

..tHb-mass and plasma volume were measured using the CO-rebreathing method...

..Unlike hydrochlorothiazide, exercise training can improve insulin resistance and aerobic capacity in older hypertensive people...

..This was attributed to the significantly augmented fluid volume state already present at rest in late gestation...

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The aim of this study was to determine the effect of acute plasma volume expansion on arterial blood-gas status during 6...

..05), respectively]. Haemoglobin and haematocrit were increased after 24 h and plasma volume decreased after 48 h of HDT (P < 0.05)...

..The present study on the rat aims at evaluating the change in plasma volume after 2.5 h from a state of hyper- and hypovolemia...

..the necessity of taking pre-analytical precautions to avoid possible suspicious results coming from major plasma volume changes caused notably by dehydration...

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AIM: The purpose of this study was to examine the effect of plasma volume (PV) expansion, induced by 1 single bout of high intensity exercise, on venous capacitance...

To compare plasma lactate concentration recovery kinetics when measured and corrected for variations in plasma volume between children and adults.

..in [SID]a, secondary to lower [Cl-]a and [Lac-]a; and second, to a reduction in [Atot]a, due to greater plasma volume and less plasma water flux (Jv) into leg muscle (P<0.05)...

..However, the absence of a significant plasma volume expansion together with hypernatremia and increased plasma osmolality suggest a considerable degree of ..

A negative fluid balance during bed rest (BR) is accompanied by decreased plasma volume (PV) which contributes to cardiovascular deconditioning.

..Total body water (TBW, measured by isotope dilution) and plasma volume (PV, calculated from the haemoglobin and the haematocrit) were measured in a control group (Co, n=9) and a ..

..ECS exerted a 44 hPa pressure at the ankle. Blood lactate concentrations, hematocrit, and plasma volume were measured after a 60-min rest and every 20 min during recovery...

..15) defines equivalent relative submaximal intensities in these environmental conditions...

..There were no significant changes in blood or plasma volume for any groups over the 12 wk...

..H), blood viscosity (etab), plasma viscosity (etapl), index of erythrocyte rigidity (Tk), changes in plasma volume (DeltaPV), pulmonary diffusing capacity (DLco), and arteriolized blood gas (PaO2) were measured before and ..

..Hormone concentrations were determined by radioimmunoassays. Glomerular filtration rate and plasma volume were determined by standard methods...

..HSS and D40 infusions induced a significant increase in relative plasma volume reaching 134.9+/-2.8 and 125.0+/-1.9%, respectively at the end of fluid infusion...

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Pregnancy induces a smaller rise in plasma volume in formerly preeclamptic women with a pre-existent subnormal plasma volume than in their counterparts with a normal plasma volume...

..This study evaluated sodium and fluid balance disturbances in anorexia nervosa...

..samples were drawn before and 15, 30, 45, and 60 min after the beginning of exercise to measure variations in plasma volume, osmolality, and concentrations in arginine vasopressin (AVP), atrial natriuretic factor (ANF), plasma renin ..

..b>Plasma volume decreased 10.1% following resistance exercise. This occurred in parallel with an increase of 5.6%, 5.4% and 6...

..As a result, the genomic action of ALD may be affected more by the sweat Na+ variation than by the rapidly non-genomic action during exercise in humans...

..Thus the splanchnic and renal vascular beds neither directly contribute to nor attenuate postexercise hypotension...

..The combination of high/low G-load with low/high intensity exercise will determine the optimal protocol for prevention of cardiovascular deconditioning, myatrophy, and osteoporosis...

In formerly preeclamptic women with a low plasma volume, the recurrence rate of preeclampsia is higher than in women with a normal prepregnant plasma volume...

..Therefore, one of the questions asked in this study were if movement between the two defined body positions produces similar changes when employing Protocol X vs. Protocol Y...

..932, p=0.007). The changes in ventricular volume caused by dehydration were much larger than those seen in day-to-day fluctuations in a normally hydrated healthy control subject...

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To evaluate changes in plasma volume (deltaPV) during exercise in patients with single ventricular physiology with cyanosis; post-Fontan patients; and in patients after right ventricular outflow tract reconstruction (RVOTR).

..These results suggest that in ambient environmental conditions, fluid ingestion alone has a negligible effect on circulating neutrophil and LPS-stimulated neutrophil degranulation responses to prolonged exercise...

..Measures of performance (ODT time), fluid retention, urine output, blood plasma volume changes, and sweat loss were obtained prior to and during the ODT in both the glycerol and placebo conditions...

The effect of a high (H) and a low (L) rate of post-exercise fluid consumption on plasma volume and fluid balance restoration was investigated...

..42 +/- 0.06 vs. 0.44 +/- 0.08 kg) were not changed. The higher resting and exercise T(in) and delayed onset of SBF and SR suggest a centrally mediated elevation in the thermoregulatory set point during bed rest exposure...

..Basal sympathetic nervous system (SNS) activity and alpha-adrenergic vascular sensitivity are significant physiological correlates of ANS support of BP in this population...

..In addition, the WR measured at VT1, VT2 and VO(2)peak varies with the ramp slope and should be utilized cautiously when prescribing training or evaluating performance...

..005) in body temperature, urine specific gravity, hematocrit, and hemoglobin (calculated 8% decrease in plasma volume) as well as decreased body mass (p < 0.005). 1RM was decreased following D (111.4 +/- 7...

We measured central venous pressure (CVP); plasma volume (PV); urine volume rate (UVR); renal excretion of sodium (UNa); and renal clearances of creatinine, sodium, and osmolality before and after acute volume infusion to test the ..

..heart rate (HR), stroke volume (SV), cardiac output (CO), total peripheral resistance (TPR) and measures of plasma volume. Three groups of normal volunteers (n = 56) were studied supine, before and during increasing levels of ..

To investigate the hypothesis that a reduction in plasma volume (PV) induced by diuretic administration would result in an increase in the fluid and electrolyte hormonal response to exercise, ten untrained males (VO(2) peak = 3.96 +/- 0...

..LPS)-induced endotoxemia, increased intrasplenic fluid efflux contributes to a reduction in plasma volume. We hypothesized that splenic sympathetic nerve activity (SSNA), which increases during endotoxemia, limits ..

To investigate the role of an increase in plasma volume (PV), characteristically observed with short-term endurance training, on the endocrine response to prolonged moderate intensity exercise, eight untrained males (VO2 peak = 3...

..Control subjects experienced no changes in their professional training and routine daily activities. Plasma volume (PV), urinary and plasma sodium (Na) and potassium (K), plasma osmolality, plasma protein, whole blood ..

..each condition, changes in serum protein, albumin, and electrolytes (Cl-, Na+, K+); total body water (TBW); plasma volume (PV); and interstitial (ISF), extracellular (ECF), and intracellular (ICF) fluids were determined...

..ACTH) were collected at days 120, 125, and 130; fetal and maternal blood pressure and heart rate and maternal plasma volume were measured at days 120 and 130...

..Many paradoxes and questions remain, however. Although body mass, extracellular fluid volume, and plasma volume are reduced during spaceflight and remain so at landing, the changes in total body water are comparatively ..

..The pregnancy-related physiology is characterized by a 50% increase in plasma volume and a 25% increase in erythrocyte volume...

..To assess clinical and neurohumoral response to posture, physical exercise, and ascites treatment in patients with Child-Pugh C liver cirrhosis and tense ascites...

..After the initial head-up tilt the decrease in the CBV is caused by further reduction in plasma volume as shown by increase in haematocrite and unchanged distribution of labeled red blood cells...

..The most interesting one is that based on the simultaneous administration of plasma volume expansion and vasoconstrictors. The second is transjugular intrahepatic porto-systemic shunt...

..In hot environments, the American football uniform predisposes athletes to exertional heat exhaustion or exercise-induced hyperthermia at the threshold for heat stroke (rectal temperature [T(re)] > 39 degrees C)...

..To compare the efficacy of crystalloid (Normal saline) and colloid (polymer from degraded Gelatin in saline Haemaccel) intravenous fluid in restoration of circulating volume in children with septic shock...

..We have found that reduction in maternal cortisol results in a deficiency in the normal expansion of maternal plasma volume. This model also causes reduced fetal blood pressure and increased incidence of fetal hypoxia and fetal and ..

..We have found that reduction in maternal cortisol results in a deficiency in the normal expansion of maternal plasma volume. This model also causes reduced fetal blood pressure and increased incidence of fetal hypoxia and fetal and ..

..Maximal O2 uptake (VO2max); circulating plasma volume and Hct at rest and heavy exercise. 2...

..Long term studies will examine the effects of hyponatremia on ovine AF volume, maternal plasma volume and umbilical and uterine blood flows in both normal and oligohydramnios ovine pregnancies...

..Long term studies will examine the effects of hyponatremia on ovine AF volume, maternal plasma volume and umbilical and uterine blood flows in both normal and oligohydramnios ovine pregnancies...

..We have found low plasma volume in the majority of patients with POTS. This can trigger the sympathetic activation that drives the tachycardia...

..The work should help defining the physiological role of CNT renin in sodium balance, plasma volume and arterial pressure regulation...

..HU results in a central movement of body fluid, diuresis and natriuresis, resulting in a decrease in plasma volume. We have observed that rats increase ingestion of saline solution during 24h HU...

..Moreover, profuse sweating that occurs during heat stress contributes to impaired blood pressure control if plasma volume is sufficiently reduced...

..Moreover, profuse sweating that occurs during heat stress contributes to impaired blood pressure control if plasma volume is sufficiently reduced...

..We suggested that low prepregnancy plasma volume was an important marker for those at risk and that volume expansion was the critical pregnancy specific ..

..transient hyperhomocysteinemia, serum and urinary measures of iron stores and oxidative stress, red cell and plasma volume, regional arterial wall shear stress, and erythropoietin levels will be obtained before and after the assigned ..

..One feature is a pre-pregnancy phenotype that includes reduced plasma volume, elevated sympathetic tone, reduced utenne blood flow and enhanced platelet activation...

..combining very low temperatures with total exsanguination and blood substitution with BioTime's FDA-approved plasma volume expander Hextend(r)...

..such that the female offspring may not appropriately reset their plasma osmolality and adequately expand their plasma volume during their subsequent pregnancies...

..These studies will be carried out in the basal state and during plasma volume expansion in order to augment sodium excretion...

..in neural regulation of blood pressure, while dopamine (DA) plays an important depressor role via renal and plasma volume mechanisms. Dopaminebeta-hydroxylase (DBH) is the enzyme responsible for the conversion of DA to NE...

Early in normal human pregnancy, maternal plasma osmolality decreases and plasma volume increases...

..Changes in blood pressure, plasma volume, osmolality and the concentration of circulating hormones all influence the activity of vasopressin neurons in ..