نتایج جستجو برای: capillary tissue exchange
تعداد نتایج: 1126028 فیلتر نتایج به سال:
The coronary capillary ow is analyzed theoretically based on continuum mechanics. The capillary is a long, elastic and permeable vessel loaded externally by tissue pressure. It is subject to possible periodic length changes, together with adjacent myocites. Capillary ow is driven by arteriolar-venular pressure di erence. Ultra ltration, due to transmural hydrostatic and osmotic gradients is inc...
The postarteriolar response of capillary transport and microvascular flow distribution to muscle contraction and to adenosine was measured by the indicator dilution technique in isolated dog gracilis muscles perfused with blood at controlled flows. A model of dual circulation was used to analyze the partition of microvascular flow. The extraction (E) of 125I-iodoantipyrine (IAp) served as an in...
The HPLC/MS system, in which a monolithic silica capillary column is directly connected to an electronspray-ionization mass spectrometer, showed superior performance at high mobile phase linear velocity. A two-dimensional (2D) HPLC/MS system was established, using an ion-exchange particle-packed capillary column at the first dimension and a monolithic silica capillary column at the second dimen...
This review will summarize current knowledge on the role of the extracellular matrix (ECM) in general and on the interstitial fluid pressure (P(if)) in particular with regard to their importance in transcapillary exchange. The fluid volume in the interstitial space is normally regulated within narrow limits by automatic re-adjustment of the interstitial hydrostatic and colloid osmotic pressures...
Micromorphological changes in skeletal muscle vascular remodeling due to denervation, aging or tumour growth have been investigated recently. Naturally, quantitative imaging of the capillary bed and the determination of microstructural parameters in healthy and pathological tissue might prove beneficial for potential therapeutic interventions. Susceptibility differences of capillaries and surro...
The pathophysiology of cerebral ischemia is traditionally understood in relation to reductions in cerebral blood flow (CBF). However, a recent reanalysis of the flow-diffusion equation shows that increased capillary transit time heterogeneity (CTTH) can reduce the oxygen extraction efficacy in brain tissue for a given CBF. Changes in capillary morphology are typical of conditions predisposing t...
A micro-capillary film has been developed that offers the potential for an at-line analytical tool for rapid aggregate analysis during biopharmaceutical antibody production. A non-porous walled micro-capillary film (NMCF) with cation exchange functionality was demonstrated to act as a chromatography medium that could be operated with high linear fluid velocities and was highly resistant to bloc...
"Vascular" artifacts can have substantial effects on human cerebral blood flow values calculated by using arterial spin tagging approaches. One vascular artifact arises from the contribution of "tagged" arterial water spins to the observed change in brain water MR signal. This artifact can be reduced if large bipolar gradients are used to "crush" the MR signal from moving arterial water spins. ...
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