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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 35 (1977), S. 241-246 
    ISSN: 1432-0584
    Keywords: Blutgerinnungsfaktoren ; Brandblasen ; Permeabilität (Kapillardurchlässigkeit) ; Coagulation factors ; Burn blisters ; Permeability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Following clotting factor assays were performed on the fluid of burn blisters of 11 patients with severe burns: Fibrinogen levels, Factor II, V, X and XIII, thrombin time, fibrin split products, plasminogen, antithrombin III, IgA, IgM, IgG, ethanol gelation test and total proteins. The results showed, that a quantity of Factor II, X and XIII, antithrombin III, plasminogen and IgG had left the circulation. On the contrary we found only small concentrations of Factor V, fibrinogen, IgM and IgA in the fluid of burn blisters. This distribution suggested that the losses of plasma proteins into the burn blisters were correlated to their concentration and their molecular weight. The decrease of plasma coagulation proteins during the first days after severe burns was probably partly due to losses through the walls of the vessels, because of the increased capillary permeability.
    Notes: Zusammenfassung Bei 11 Patienten werden folgende Untersuchungen des Brandblaseninhaltes durchgeführt: Fibrinogen, F.II, F.V, F.X und F.XIII, Fibrinogen-Fibrin-Spaltprodukte, Thrombinzeit, Plasminogen, Antithrombin III, IgA, IgM, IgG, Äthanol-Test und Gesamteiweiß. Die Ergebnisse zeigen, daß nach thermischem Trauma beträchtliche Mengen der Faktoren II, X und XIII, Antithrombin III, Plasminogen und IgG das Gefäßsystem verlassen, während F.V, Fibrinogen, IgM und IgA nur im geringen Ausmaß in der Blasenflüssigkeit nachweisbar sind. Nach diesem Verteilungsmuster der Brandblasenproteine muß angenommen werden, daß ihr Austritt aus dem Intravasalraum entsprechend ihrer Plasmakonzentration und Molekülgröße erfolgt. Der Abfall von Gerinnungsfaktoren bei Verbrennungspatienten in den ersten Tagen ihrer Erkrankung läßt sich somit zum Teil durch Verluste aus dem Gefäßsystem infolge der Permeabilitätssteigerung erklären.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Surveys in geophysics 17 (1996), S. 347-360 
    ISSN: 1573-0956
    Keywords: Ultrasonic waves ; Attenuation ; Velocity ; Microstructure ; Thermal cracking ; Local fluid flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The frequency dependent mechanism of local fluid flow was found to be the decisive absorption and dispersion mechanism in fluid containing sandstones. In the ultrasonic frequency range local fluid flow and grain surface effects control the behaviour of highly porous and highly permeable rock if a pore fluid is present. Both mechanisms depend less on macroscopic rock parameters like porosity and permeability than essentially on microscopic parameters like crack size, crack density and grain contact properties. To demonstrate directly the important influence of the microstructure on the rock elastic and anelastic properties the microstructure of a sandstone was artificially changed by thermal cracking. The cracked rock exhibits a clearly changed behaviour at low uniaxial as well as at high hydrostatic pressure despite small changes of porosity and permeability. Fluid effects increase due to cracking. The experimental results are explained by means of a rock, model and local fluid flow. These results emphasize that it is the microstructure which controls the elastic and anelastic rock behaviour, even at high hydrostatic pressure.
    Type of Medium: Electronic Resource
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