The Experts below are selected from a list of 135 Experts worldwide ranked by ideXlab platform
D. C. White - One of the best experts on this subject based on the ideXlab platform.
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Warming Blood before transfusion. Does immersion warming change Blood Composition
Anaesthesia, 2007Co-Authors: R. J. Marks, B. D. Minty, D. C. WhiteAbstract:The practice of warming Blood for transfusion by immersion in a water bath has been studied. Blood, 3 days after collection, with CPD-adenine anticoagulant, was warmed at 25 degrees C, 37 degrees C and 45 degrees C for up to 2 hours. The procedure was repeated after 2 and 4 weeks' storage at 4 degrees C. Only trivial biochemical and morphological changes resulted from warming. Within these limits, immersion warming of Blood appears to be a reasonable alternative to using a Blood-warming coil. Other aspects of immersion warming are discussed.
R. J. Marks - One of the best experts on this subject based on the ideXlab platform.
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Warming Blood before transfusion. Does immersion warming change Blood Composition
Anaesthesia, 2007Co-Authors: R. J. Marks, B. D. Minty, D. C. WhiteAbstract:The practice of warming Blood for transfusion by immersion in a water bath has been studied. Blood, 3 days after collection, with CPD-adenine anticoagulant, was warmed at 25 degrees C, 37 degrees C and 45 degrees C for up to 2 hours. The procedure was repeated after 2 and 4 weeks' storage at 4 degrees C. Only trivial biochemical and morphological changes resulted from warming. Within these limits, immersion warming of Blood appears to be a reasonable alternative to using a Blood-warming coil. Other aspects of immersion warming are discussed.
Keizo Shiraki - One of the best experts on this subject based on the ideXlab platform.
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Water drinking causes a biphasic change in Blood Composition in humans
Pflugers Archiv : European journal of physiology, 2001Co-Authors: Yutaka Endo, R Torii, Fumio Yamazaki, Sueko Sagawa, Katsuya Yamauchi, Yuka Tsutsui, Toshihito Morikawa, Keizo ShirakiAbstract:To investigate precisely the fluid shifts associated with water drinking in humans, we measured continuously Blood density and plasma electrolyte concentrations using the mechanical oscillator technique and ion-selective electrodes, respectively, in healthy young volunteers before (10 min) and after (48 min) water drinking for a period of 2 min. Beat-by-beat Blood pressure was also monitored throughout the experiment. Drinking 1 l tap water caused a transient increase in Blood density immediately after the drinking episode (from 1051.1+/-0.5 g/l before drinking to 1051.8+/-0.5 g/l 4 min after the start of drinking, P
Stuart Egginton - One of the best experts on this subject based on the ideXlab platform.
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Differential effect of cold acclimation on Blood Composition in rats and hamsters.
Journal of comparative physiology. B Biochemical systemic and environmental physiology, 2001Co-Authors: Durmus Deveci, P.c.w. Stone, Stuart EggintonAbstract:Male rats and hamsters were exposed to a progressively lower air temperature and shorter photoperiod to simulate the onset of winter. Normothermic hamsters had a higher haematological oxygen carrying capacity (OCC) and coagulability (shorter prothrombin time and activated partial thromboplastin time) than rats. Cold acclimation significantly increased the OCC of rats, which parallels an increased metabolic rate, while no differences were observed in hamsters. Red cell transit time through filters was faster in the acclimated rats but not in hamsters, reflecting the lower mean cell volume due to a decreased rate of clearance from the circulation. Platelet counts were significantly lower in both cold-acclimated rats and hamsters, and there was a significant leucopenia in rats, which would reduce the degree of microvascular blockade. Whole Blood viscosity, plasma viscosity, and serum osmolarity showed little change in either species. However, whole Blood viscosity was significantly lower in cold-acclimated hamsters than control hamsters at the lowest shear rate tested (0.95 s(-1)). Interestingly, plasma viscosity and serum osmolarity were significantly lower in hamsters exposed to low temperatures for a shorter period (4 weeks), and may reflect the development of a reduced coagulability. These data suggest that Blood Composition in hamsters contributes to an innate tolerance of low temperatures, maintaining tissue perfusion under hypothermic conditions and aiding arousal from hibernation.
Kent D. Dunlap - One of the best experts on this subject based on the ideXlab platform.
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External and internal influences on indices of physiological stress: II. Seasonal and size-related variations in Blood Composition in free-living lizards, Sceloporus occidentalis.
The Journal of experimental zoology, 1995Co-Authors: Kent D. DunlapAbstract:Seasonal changes in Blood Composition (plasma osmolality, total plasma protein, hematocrit) in two free-living populations of fence lizards, Sceloporus occidentalis, one living in a very arid environment (Pearblossom, CA) and another in a milder desert (Bend, OR), were analyzed. In this analysis, two features of reptilian physiology and ecology were incorporated: ontogenetic variation in Blood Composition and seasonal variation in body-size distribution. The population living in the arid environment, but not the mild environment, exhibited significant seasonal changes in Blood Composition: mean plasma osmolality increased (345 +/- 4 to 356 +/- 3 mOsmol/kg) and mean plasma protein (4.19 +/- 0.20 to 3.34 +/- 0.14 g/dl) and hematocrit decreased (43.8 +/- 0.3 to 31.6 +/- 0.4) from April to August. These changes suggested that the physiological condition of the California population was affected by seasonal changes in the external environment. However, among individuals, a significant portion of the variation in Blood Composition was associated with an internal factor, body size. Larger lizards had higher osmolality, total protein, and hematocrit than smaller lizards in all seasons. In addition, the mean body size of active lizards decreased from April to August in California, but not Oregon. Because the body-size distribution of active lizards in California shifted between seasons, changes in mean population values of these Blood parameters probably do not accurately reflect changes that occur within individuals and therefore may be misleading in assessing the physiological consequences of drought.
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External and Internal Influences on Indices of Physiological Stress: 11. Seasonal and Size-Related Variations in Blood Composition in Free-Living
1995Co-Authors: Kent D. DunlapAbstract:Seasonal changes in Blood Composition (plasma osmolality, total plasma protein, hematocrit) in two free-living populations of fence lizards, Sceloporus occidentalis, one living in a very arid environment (Pearblossom, CA) and another in a milder desert (Bend, OR), were ana- lyzed. In this analysis, two features of reptilian physiology and ecology were incorporated: ontoge- netic variation in Blood Composition and seasonal Variation in body-size distribution. The population living in the a rid environment, but not the mild environment, exhibited significant seasonal changes in Blood Composition: mean plasma osmolality increased (345 f 4 to 356 f 3 mOsmoVkg) and mean plasma protein (4.19 0.20 to 3.34 f 0.14 g/dl) and hematocrit decreased (43.8 * 0.3 to 31.6 2 0.4) from April to August. These changes suggested that the physiological condition of the California population was affected by seasonal changes in the external environment. However, among indi- viduals, a significant portion of the variation in Blood Composition was associated with an internal factor, body size. Larger lizards had higher osmolality, total protein, and hematocrit than smaller lizards in all seasons, In addition, the mean body size of active lizards decreased from April to August in California, but not Oregon. Because the body-size distribution of active lizards in Cali- fornia shifted between seasons, changes in mean population values of these Blood parameters probably do not accurately reflect changes that occur within individuals and therefore may be misleading in assessing the physiological consequences of drought. o 199~i Wiley-Liss, Inc.