Search Results
Results 751 - 800 of 1138
< 11 12 13 14 15 16 17 18 19 20 21 >
Bhatia R K - - 1987
The determinants of plasma colloid osmotic pressure were studied in 32 patients with preeclampsia and their matched control subjects. Although plasma colloid osmotic pressure was significantly related to preeclampsia, its severity, and proteinuria, it was most highly correlated with an elevated fibronectin level, suggesting that endothelial injury, rather than proteinuria, ...
Anderson S E - - 1987
To resolve discrepancies between models used to calculate myocardial capillary solute permeability we measured tissue-fluid pressure (Pi), perfusion pressure (Pp), and heart weight continuously after a step change in the NaCl or inulin concentration of crystalloid solutions perfusing isolated rabbit hearts. Linear regression analysis of the mean values for near ...
Havill A M - - 1987
The rate and sequence of interstitial and alveolar fluid removal from the lung after the occurrence of pulmonary edema were examined. Rats were given intraperitoneal injections of 20 mg/kg alpha-naphthylthiourea (ANTU), resulting in an increased permeability edema with alveolar flooding. Animals were killed at intervals between 2 and 48 hours ...
Poole C J - - 1987
The osmotic and cardiovascular control of arginine vasopressin (AVP) secretion, and the effect of this hormone on cardiovascular regulation were assessed both in normal controls and in subjects with tetraplegia. Infusion of hypertonic saline caused a marked rise in blood pressure in the tetraplegics but not in the normal controls. ...
Naich M - - 1987
The mean haemolymph volume in a copper-tolerant, intermoult (C2-C4) adult (more than a year old) Orconectes virilis, as determined by [14C-carboxylic] inulin dilution method, ranged from 61.17 microliters in females (mean wet body weight = 4.34 g; mean carapace length = 4.43 cm) to 61.79 microliters in males (mean wet ...
Rackow E C - - 1987
We compared the effect of crystalloid to colloid fluid infusion on extravascular lung water (EVLW) in hypoproteinemic dogs. Plasmapheresis was used to decrease plasma colloid osmotic pressure (COP) to less than 40% of its base-line level. Five animals were then infused with 0.9% sodium chloride (saline), five with 5% human ...
Sheffield C L - - 1987
Dialysis of human red blood cells using a hypotonic solution and a commercial kidney dialysis unit followed by ultrafiltration through 0.1 micron pore hollow fibers provides an easily managed method for isolation of lipid-free hemoglobin. High pressure liquid chromatography analysis of lipid-free hemoglobin (LFHB) indicates 99-100% protein purity. Sodium dodecyl ...
Aukland K - - 1987
The effect on colloid osmotic pressure (COP) of heparinizing body fluids was estimated with a low compliant osmometer, using Diaflo PM-30 or PM-10 membranes (Amicon, Lexington, Mass., USA). It was found that collecting and storing samples in preheparinized glass capillaries may increase COP by up to 4.0 mmHg. Measurements on ...
Pitkänen J - - 1987
Thermal skin injury is accompanied by rapid and excessive oedema formation implicating a dramatic increase in the transcapillary fluid transport. In order to clarify the pressure changes occurring across the microvasculature after a thermal skin injury we have measured colloid osmotic pressures (COP) in interstitial fluid (COPi) of injured and ...
Miki K - - 1987
Extracellular fluid volume (ECF, [125I]iothalamate space), blood volume (BV, 51Cr-labeled erythrocyte space), and hematocrit were measured continuously to study the kinetics of fluid movements between intracellular, interstitial, and plasma compartments during water immersion (WI) at 38 degrees C in seven splenectomized and acutely nephrectomized dogs. ECF and plasma volume (PV) ...
Richardson W N - - 1987
Transvascular fluid flux was induced in six isolated blood-perfused canine lobes by increasing and decreasing hydrostatic inflow pressure (Pi). Fluid flux was followed against the change in concentration of an impermeable tracer (Blue Dextran) measured directly with a colorimetric device. The time course of fluid flux was biphasic with an ...
Oian P - - 1987
Transcapillary fluid dynamics in the follicular and luteal phase in women without symptoms of premenstrual syndrome were studied. Interstitial colloid osmotic pressure was measured by the "wick" method and interstitial hydrostatic pressure by the "wick-in-needle" method in subcutaneous tissue on the thorax and ankle. From follicular to luteal phase, the ...
Mellander S - - 1987
A venous microcannulation technique applied to the cat gastrocnemius muscle was developed which, based on morphological and functional demonstrations of anastomotic connections between two supplying segmental vascular circuits at the level of capillaries and/or post-capillary venules, seems to permit continuous recordings of hydrostatic pressure (denoted Pcvenule) transmitted from such anastomoses, ...
Nonami H - - 1987
Turgor measured with a miniature pressure probe was compared to that measured with an isopiestic thermocouple psychrometer in mature regions of soybean (Glycine max [L.] Merr.) stems. The probe measured turgor directly in cells of intact stems whereas the psychrometer measured the water potential and osmotic potential of excised stem ...
Lai-Fook S J - - 1987
The mechanical properties of the perivascular interstitium surrounding large pulmonary blood vessels are defined in terms of interstitial fluid pressure, interstitial compliance, and interstitial hydraulic resistance. Interstitial pressure is one of the main forces which determine liquid filtration across the microvascular barrier. Interstitial compliance is a measure of the ability ...
Shumko J Z - - 1987
The principal focus of this study was to evaluate the hypothesis that increased interstitial fluid pressures served to stimulate de novo vesicle formation in pulmonary capillary endothelium. Direct measurements of interstitial fluid pressures within the alveolar septa pose great technical difficulty. The pleural space and subpleural capillaries are easily accessible, ...
Nguyen H N - - 1986
Colloid osmotic pressure is a principal regulator of capillary fluid exchange. Alterations in colloid osmotic pressure in preeclamptic patients, as well as significant peripartum changes in colloid osmotic pressure in normotensive patients, are reported. In a study of 72 normotensive and preeclamptic patients, peripartum colloid osmotic pressure, serum albumin, and ...
Avron B - - 1986
Trophozoites of Entamoeba invadens IP-1 can be induced to encyst in simple solutions composed of semipermeable constituents (buffer, salts, or sugars) provided that their osmotic pressure is in the range of 60-160 mosmol/kg. Optimal yield of mature cysts was obtained when the osmotic pressure of the medium was 110 mosmol/kg. ...
Jones M M - - 1986
Plasma colloid osmotic pressure acts to retain fluid in the intravascular space. Intravenous crystalloids have been identified as one of the major factors contributing to the consistent peripartum decline in colloid osmotic pressure. This study was undertaken to compare the effect of two crystalloid infusions (1000 and 2000 mL Plasma-Lyte ...
Jivegård L - - 1986
The cystic duct was ligated and gallstones were implanted into the gallbladder in cats. Five to eighteen weeks later the hydrostatic pressure in the gallbladder lumen was measured after laparotomy, and fluid transport across the gallbladder epithelium was studied and compared to the microscopic gallbladder morphology. Instead of the normal ...
Seem E - - 1986
Starling forces (interstitial fluid pressure, plasma- and interstitial fluid colloid osmotic pressures) were measured in the subcutaneous tissue of legs in 22 patients with deep venous thrombosis (DVT). For comparison, measurements were obtained in the contralateral leg and in healthy controls as well. Interstitial fluid pressure (Pif) was measured with ...
Wisner D H - - 1986
The appropriate intravenous therapy for injured patients is controversial. Use of colloid-containing solutions has been advocated in an attempt to maintain intravascular colloid osmotic pressure, minimize pulmonary oedema and draw fluid out of areas of contused lung. Studies of animals with lymph fistulas in the lung do not support such ...
Bomberger R A - - 1986
To determine optimal fluid management after elective aortic surgery we compared postoperative administration of 5% dextrose Ringer's lactate solution (102 patients) with 5% dextrose half-normal saline solution (80 patients). For 72 hours after operation, intravenous fluids were titrated to maintain urine output between 50 and 100 ml/hr. The group receiving ...
Tzeghai G - - 1986
A mathematical model is presented herein to determine the effect of convection on macromolecular transport across an artery wall due to transmural or osmotic pressure differences. The model is based on an extension of the leaky junction-cell turnover model of Weinbaum et al. (1985) to take into account a combined ...
Wiig H - - 1986
Local interstitial fluid volume (IFV) and pressure (IFP) were used to estimate interstitial compliance (= delta IFV/delta IFP) in skin and skeletal muscle of normotensive (NT) and renal hypertensive rats (HT). The IFV was measured as the extravascular 51Cr-EDTA space, and IFP with micropipettes (tip diameter 2-4 microns) connected to ...
Kari R K - - 1986
Stings from scorpions (Buthus tamulus) produce acute myocarditis and can result in death in children and adults. Acute myocarditis was induced in anaesthetised dogs by intravenous injection of 4 mg/kg venom (Buthus tamulus). Myocarditis was confirmed by ECG. Blood was collected before and 30 minutes after venom treatment and processed ...
Cousineau D - - 1986
The effect of neuronal uptake inhibition on basal interstitial release of norepinephrine in the canine heart was examined by use of the multiple tracer dilution-bulk balance technique. A kinetic model incorporating the effects of flow, capillary permeability-surface product for norepinephrine, the interstitial uptake rate constant for neurotransmitter, and plasma norepinephrine ...
Hogan R D - - 1986
Lymphatic luminal pressure and interstitial fluid pressure (IFP) were measured simultaneously in the bat's wing with two servo-null micropressure systems during interstitial fluid volume expansion induced by direct interstitial infusion. Lymphatic baseline pressure, pulsatile pressure, and IFP were elevated by the interstitial infusion. Transmural pressure gradients occurred only transiently. The ...
Simpson I A - - 1986
Ultrafiltration was performed in nine patients with congestive cardiac failure that was refractory to conventional medical treatment. A mean of 12 X 7 litres of fluid was removed, and there was a sustained symptomatic improvement in all patients. Weight loss continued after ultrafiltration and a sustained increase in serum sodium ...
Light R W - - 1986
The purpose of this study was to determine whether changes in pulmonary function after therapeutic thoracentesis are related to the pleural pressure or to changes in pleural pressure during thoracentesis. Spirometry was obtained before and 24 h after thoracentesis in 26 patients. Pleural pressures were measured with a U-shaped manometer ...
Fauchald P - - 1986
The aim was to study the transcapillary fluid balance in dialysis patients during and after ultrafiltration. Plasma and subcutaneous interstitial fluid (wick technique) colloid osmotic pressure, plasma volume (I125-albumin space) and extracellular fluid volume (radiosulfate space) were measured in nine patients on maintenance hemodialysis before (pre-dialysis state) and after (dry-weight ...
Oian P - - 1986
The fluid transport between the plasma and interstitial fluid compartment is governed by the Starling forces, i.e. the capillary pressure (Pc), interstitial fluid hydrostatic pressure (Pi) and colloid osmotic pressure in plasma (COPp) and interstitial fluid (COPi). Interstitial fluid was collected from subcutaneous tissue on the thorax and ankle by ...
Mori M - - 1986
Effects of dibutyryl-cyclic AMP (db-cAMP) and cyclic AMP (cAMP) when microinjected into the hypothalamic paraventricular nucleus (PVN) in a water-loaded and ethanol-anesthetized rat on the rate of urine outflow, urine osmotic pressure and other visceral functions were investigated. The microinjection of db-cAMP decreased the rate of urine outflow with concomitant ...
Koike T I - - 1986
Hypo- and hyperosmotic NaCl were infused intravenously to examine osmotic release of arginine vasotocin (AVT) in anesthetized, acutely cardiac-denervated chickens and in conscious, chronically denervated birds. Mean arterial blood pressure was consistently higher in denervated compared to sham-operated chickens but heart rates were similar in experimental and control groups. Plasma ...
Schmid M - - 1986
In order to study the influence of the colloid osmotic pressure on albumin and total liver protein synthesis, rat hepatocytes were isolated by collagenase perfusion and incubated in Krebs-Ringer-buffer for 4 h. The colloid osmotic pressure produced by different bovine serum albumin (BSA) or dextran 60 concentrations varied from 3 ...
Hahn R - - 1986
Absorption of irrigating fluid is common during transurethral resection (TUR) of the prostate. Eleven patients were monitored peroperatively during TUR with measurements of bladder pressure, arterial blood pressure, central venous pressure and determinations of serum sodium as well as fluid balance. A rapid massive irrigating fluid absorption occurred in one ...
Schneiderman R - - 1986
We studied the effects of mechanical and osmotic compression on sulphate incorporation into glycosaminoglycans of human femoral head cartilage. We found that both mechanical and osmotic compression produce the same lowering of sulphate uptake relative to uncompressed controls. It appears that this effect is not associated with changes in solute ...
Koomans H A - - 1986
We have studied the role of adjustments of tissue-fluid colloid osmotic pressure (COP) in the maintenance of the blood volume in 10 patients with the nephrotic syndrome before and after diuretic treatment until dry weight. A mean weight reduction of 13.5 +/- 6.4 kg was attended by a fall in ...
Wiig H - - 1986
Interstitial fluid pressure (IFP), i.e., the pressure in a saline-filled tube brought into contact with the interstitium, has been measured in cats with two "acute" [micropipettes and wick-in-needle (WIN)] and two chronic (perforated and porous capsules) methods. In a control situation, similar pressures of -1.5 and -1.6 mm Hg were ...
Dunn C D - - 1986
Squirrel monkeys, restrained in lower body positive pressure (LBPP) chambers in attempts to model the space flight-induced hematological consequences of a cephalad fluid shift, showed a decrease in red blood cell mass which was largely independent of actual LBPP. The only LBPP-specific hematological effect was an alteration in red blood ...
Ramires J A - - 1986
Cardiogenic oedema results from an increase in capillary hydrostatic pressure (either pulmonary or systemic). This increase produces a reduction in the plasma colloidosmotic pressure-capillary pressure gradient, facilitating the accumulation of fluid in the interstitial space and reducing the circulating plasmatic volume. The administration of diuretics to patients with acute ventricular ...
Hori K - - 1986
In order to elucidate further the mechanisms of central necrosis formation and drug delivery into tumor tissue, the interstitial fluid pressure in the normal subcutis and in rat ascites hepatoma AH109A and AH272 tumors was measured by means of a modified diffusion chamber technique. Using our apparatus for determining tissue ...
Karlinsky J - - 1986
Transudative pleural effusion developed after plasmapheresis in a patient with Waldenström's macroglobulinemia and hyperviscosity. When albumin was added to the apheresis, the effusion resolved. We therefore suspect that rapid removal of high-molecular-weight IgM led to an abrupt decrease in intravascular colloid oncotic pressure and transudation of fluid into the pleural ...
Greenleaf J E - - 1986
The mechanism for the apparent decrease in body fluid volume in astronauts during spaceflight remains obscure. The widespread postulate that the hypohydration is the result of the Henry-Gauer reflex, a diuresis caused by inhibition of vasopressin secretion resulting from increased left and perhaps right atrial (central) venous pressure, has not ...
Lai-Fook S J - - 1986
Recent research in pulmonary physiology, anatomy, and mechanics have clarified our general understanding of liquid and solute transport through the lung. Fluid crosses the microvascular endothelial membrane at a rate that depends on gradients in the transmembrane hydrostatic and osmotic pressures and the conductance of the permeable membrane. Under normal ...
Twardowski Z J - - 1986
Intraabdominal pressures were measured during natural activities in 6 men, age 24-62 years, treated with continuous ambulatory peritoneal dialysis. The pressures were measured with a pressure transducer secured at the level of the umbilicus in the supine, sitting, and upright positions with 0-3 liters intraperitoneal fluid during talking, coughing, straining, ...
Fauchald P - - 1985
In 13 patients with heart failure colloid osmotic pressure in plasma (IIp) and in subcutaneous interstitial fluid from thorax (IIi) (wick technique), plasma volume (PV) and interstitial fluid volume (IFV) were measured and correlated to haemodynamic parameters (cardiac index (CI) and right atrial pressure (RAP]. In seven patients with anasarca ...
Wiig H - - 1985
Interstitial fluid pressure was measured in nine isolated perfused rabbit lungs with the servonull micropipette method. Bevelled glass micropipettes, with tip diameter 2-6 micrometers (o.d.) were inserted 2-6 mm into the left lung. At alveolar pressures of 3 to 5 cm H2O we found mean interstitial fluid pressures of 1.0 ...
Johnson A K - - 1985
The periventricular tissue surrounding the anteroventral third ventricle (AV3V) is critically involved in the maintenance of normal body fluid balance and distribution. The present review examines the anatomical, neurochemical, and functional relationship of the AV3V with neural systems subserving body fluid homeostasis. In particular, the nature of AV3V afferents from ...
Wiig H - - 1985
Interstitial fluid pressure (IFP) in cats was measured with four techniques, i.e., hollow perforated and porous polyethylene capsules, wick in needle (WIN), and micropipettes. During control conditions, skin IFP of -1.5 +/- 0.4 (SD) mmHg (n = 53) was obtained with micropipettes, whereas pressures recorded in subcutis with perforated and ...
< 11 12 13 14 15 16 17 18 19 20 21 >